USAP-DC

{"dp_type": "Project", "free_text": "Database"}

[{"awards": "1344502 Ducklow, Hugh; 1142158 Cheng, Chi-Hing; 2224611 Schofield, Oscar; 1440435 Ducklow, Hugh; None TBD; 2026045 Schofield, Oscar; 1543383 Postlethwait, John; 0636696 DeVries, Arthur", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": null, "datasets": null, "date_created": "Tue, 11 Mar 2025 00:00:00 GMT", "description": "Since 1990, Palmer LTER (PAL) research has been guided by the hypothesis that variability in the polar marine ecosystem is mechanistically coupled to changes in the annual advance, retreat and spatial extent of sea ice. Since that time, the hypothesis has been modified to incorporate climate migration, i.e. the displacement of a cold, dry polar climate by a warm, moist climate regime in the northern component of the PAL region, producing fundamental changes in food web structure and elemental cycling. The observed northern changes are affecting all trophic levels and elemental cycling, and the primary mechanism of change involves match-mismatch dynamics. The proposed research builds on previous findings, with a new emphasis on process studies and modeling to elucidate the mechanistic links between teleconnections, climate change, physical oceanographic forcing and ecosystem dynamics. The proposed research will examine the hypothesis that regional warming and sea ice decline associated with historical and on-going climate migration in the northern part of the study area have altered key phenological relationships, leading to changes in species distributions, increasing trophic mismatches and changes in habitat, food availability, ecosystem dynamics and biogeochemical cycling. Through targeted process studies linked to numerical model simulations, the research also will test the hypothesis that deep cross-shelf canyons characterizing the core study region are focal areas for ecosystem processes that result in predictable, elevated food resources for top-predators. The effort includes the addition of 3 new PIs: a zooplankton ecologist with expertise in biogeochemical fluxes, a phytoplankton ecologist focusing on bio-optics and autonomous observations using gliders, and a numerical simulation modeler specializing in coupled global models of ocean circulation, plankton ecology and biogeochemical cycles. The program will add trace metal sampling and analysis, moored physical oceanographic sensors, a moored sediment trap in the south, drifting sediment traps and stable carbon (del 13C) and nitrogen (del 15N) isotope analyses. Missions lasting up to 45 days using gliders deployed before, during and after summer cruises will, along with moorings and satellite remote sensing of sea ice, ocean color, sea surface temperatures and wind fields, greatly extend the observational program in space and time. Since its inception, PAL has been a leader in Information Management to enable knowledge-building within and beyond the Antarctic, oceanographic and LTER communities. PAL has designed and deployed a new information infrastructure with a relational database architecture to facilitate data distribution and sharing. The Education and Outreach program capitalizes on the public\u0027s fascination with Antarctica to promote scientific literacy from kindergarten students to adult citizens concerned with climate change and environmental sustainability. Through communicating results to the public and working with scientific assessment bodies (e.g., IPCC) and Antarctic Treaty parties to protect Earth\u0027s last frontier, PAL researchers contribute to the national scientific agenda and the greater public benefit.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Antarctica; Cryonotothenioid; R/V LMG; Bellingshausen Sea; Southern Ocean; Notothenioid; FISHERIES", "locations": "Bellingshausen Sea; Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Organisms and Ecosystems; Antarctic Integrated System Science; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Integrated System Science; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Corso, Andrew; Desvignes, Thomas; McDowell, Jan; Cheng, Chi-Hing; Biesack, Ellen; Steinberg, Deborah; Hilton, Eric", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V LMG", "repositories": null, "science_programs": "LTER", "south": -90.0, "title": "LTER Palmer, Antarctica (PAL): Land-Shelf-Ocean Connectivity, Ecosystem Resilience and Transformation in a Sea-Ice Influenced Pelagic Ecosystem", "uid": "p0010494", "west": -180.0}, {"awards": "2224760 Gooseff, Michael", "bounds_geometry": "POINT(162.87 -77)", "dataset_titles": "EDI Data Portal: McMurdo Dry Valleys LTER", "datasets": [{"dataset_uid": "200379", "doi": "", "keywords": null, "people": null, "repository": "Environmental Data Initiative (EDI)", "science_program": null, "title": "EDI Data Portal: McMurdo Dry Valleys LTER", "url": "https://portal.edirepository.org/nis/browseServlet?searchValue=MCM"}], "date_created": "Tue, 14 Nov 2023 00:00:00 GMT", "description": "Non-technical Abstract The McMurdo Dry Valleys LTER seeks to understand how changes in the temporal variability of ecological connectivity interact with existing landscape legacies to alter the structure and functioning of this extreme polar desert ecosystem. This research has broad implications, as it will help us to understand how natural ecosystems respond to ongoing anthropogenic global change. At the same time, this project also serves an important educational and outreach function, providing immersive research and educational experiences to students and artists from diverse backgrounds, and helping to ensure a diverse and well-trained next generation of leaders in polar ecosystem science and stewardship. Ultimately, the results of this project will help us to better understand and prepare for the effects of climate change and develop scientific insights that are relevant far beyond Antarctic ecosystems. The McMurdo Dry Valleys (MDVs) make up an extreme polar desert ecosystem in the largest ice-free region of Antarctica. The organisms in this ecosystem are generally small. Bacteria, microinvertebrates, cyanobacterial mats, and phytoplankton can be found across the streams, soils, glaciers, and ice-covered lakes. These organisms have adapted to the cold and arid conditions that prevail outside of lakes for all but a brief period in the austral summer when the ecosystem is connected by liquid water. In the summer when air temperatures rise barely above freezing, soils warm and glacial meltwater flows through streams into the open moats of lakes. Most biological activity across the landscape occurs in summer. Through the winter, or polar night (6 months of darkness), glaciers, streams, and soil biota are inactive until sufficient light, heat, and liquid water return, while lake communities remain active all year. Over the past 30 years, the MDVs have been disturbed by cooling, heatwaves, floods, rising lake levels, as well as permafrost and lake ice thaw. Considering the clear ecological responses to this variation in physical drivers, and climate models predicting further warming and more precipitation, the MDV ecosystem sits at a threshold between the current extreme cold and dry conditions and an uncertain future. This project seeks to determine how important the legacy of past events and conditions versus current physical and biological interactions shape the current ecosystem. Four hypotheses will be tested, related to 1) whether the status of specific organisms are indicative ecosystem stability, 2) the relationship between legacies of past events to current ecosystem resilience (resistance to big changes), 3) carryover of materials between times of high ecosystem connectivity and activity help to maintain ecosystem stability, and 4) changes in disturbances affect how this ecosystem persists through the annual polar night (i.e., extended period of dark and cold). Technical Abstract In this iteration of the McMurdo LTER project (MCM6), the project team will test ecological connectivity and stability theory in a system subject to strong physical drivers (geological legacies, extreme seasonality, and contemporary climate change) and driven by microbial organisms. Since microorganisms regulate most of the world\u2019s critical biogeochemical functions, these insights will be relevant far beyond polar ecosystems and will inform understanding and expectations of how natural and managed ecosystems respond to ongoing anthropogenic global change. MCM6 builds on previous foundational research, both in Antarctica and within the LTER network, to consider the temporal aspects of connectivity and how it relates to ecosystem stability. The project will examine how changes in the temporal variability of ecological connectivity interact with the legacies of the existing landscape that have defined habitats and biogeochemical cycling for millennia. The project team hypothesizes that the structure and functioning of the MDV ecosystem is dependent upon legacies and the contemporary frequency, duration, and magnitude of ecological connectivity. This hypothesis will be tested with new and continuing monitoring, experiments, and analyses of long-term datasets to examine: 1) the stability of these ecosystems as reflected by sentinel taxa, 2) the relationship between ecological legacies and ecosystem resilience, 3) the importance of material carryover during periods of low connectivity to maintaining biological activity and community stability, and 4) how changes in disturbance dynamics disrupt ecological cycles through the polar night. Tests of these hypotheses will occur in field and modeling activities using new and long-term datasets already collected. New datasets resulting from field activities will be made freely available via widely-known online databases (MCM LTER and EDI). The project team has also developed six Antarctic Core Ideas that encompass themes from data literacy to polar food webs and form a consistent thread across the education and outreach activities. Building on past success, collaborations will be established with teachers and artists embedded within the science teams, who will work to develop educational modules with science content informed by direct experience and artistic expression. Undergraduate mentoring efforts will incorporate computational methods through a new data-intensive scientific training program for MCM REU students. The project will also establish an Antarctic Research Experience for Community College Students at CU Boulder, to provide an immersive educational and research experience for students from diverse backgrounds in community colleges. MCM LTER will continue its mission of training and mentoring students, postdocs, and early career scientists as the next generation of leaders in polar ecosystem science and stewardship. Historically underrepresented participation will be expanded at each level of the project. To aid in these efforts, the project has established Education \u0026 Outreach and Diversity, Equity, and Inclusion committees to lead, coordinate, support, and integrate these activities through all aspects of MCM6. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 162.87, "geometry": "POINT(162.87 -77)", "instruments": null, "is_usap_dc": true, "keywords": "COMMUNITY DYNAMICS; ABLATION ZONES/ACCUMULATION ZONES; SOIL TEMPERATURE; DIATOMS; FIELD INVESTIGATION; PERMANENT LAND SITES; BUOYS; GROUND-BASED OBSERVATIONS; SEDIMENTS; SNOW WATER EQUIVALENT; SPECIES/POPULATION INTERACTIONS; WATER-BASED PLATFORMS; FIXED OBSERVATION STATIONS; VIRUSES; PHYTOPLANKTON; ACTIVE LAYER; FIELD SURVEYS; RADIO TRANSMITTERS; DATA COLLECTIONS; ECOLOGICAL DYNAMICS; LANDSCAPE; GROUND WATER; SNOW/ICE CHEMISTRY; LAND-BASED PLATFORMS; ANIMALS/INVERTEBRATES; ECOSYSTEM FUNCTIONS; HUMIDITY; GEOCHEMISTRY; SURFACE WINDS; RIVERS/STREAM; GLACIER MASS BALANCE/ICE SHEET MASS BALANCE; SNOW; LAND RECORDS; ATMOSPHERIC PRESSURE; SURFACE TEMPERATURE; ATMOSPHERIC RADIATION; BACTERIA/ARCHAEA; AIR TEMPERATURE; GLACIERS; SNOW/ICE TEMPERATURE; SOIL CHEMISTRY; METEOROLOGICAL STATIONS; WATER QUALITY/WATER CHEMISTRY; TERRESTRIAL ECOSYSTEMS; MOORED; PROTISTS; STREAMFLOW STATION; Dry Valleys; LAKE/POND; LAKE ICE; SNOW DEPTH; AQUATIC ECOSYSTEMS; SNOW DENSITY; FIELD SITES", "locations": "Dry Valleys", "north": -77.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Gooseff, Michael N.; Adams, Byron; Barrett, John; Diaz, Melisa A.; Doran, Peter; Dugan, Hilary A.; Mackey, Tyler; Morgan-Kiss, Rachael; Salvatore, Mark; Takacs-Vesbach, Cristina; Zeglin, Lydia H.", "platforms": "LAND-BASED PLATFORMS; LAND-BASED PLATFORMS \u003e FIELD SITES; LAND-BASED PLATFORMS \u003e FIELD SITES \u003e DATA COLLECTIONS; LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION; LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS; LAND-BASED PLATFORMS \u003e FIELD SITES \u003e RADIO TRANSMITTERS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e FIXED OBSERVATION STATIONS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e GROUND-BASED OBSERVATIONS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e METEOROLOGICAL STATIONS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e STREAMFLOW STATION; WATER-BASED PLATFORMS; WATER-BASED PLATFORMS \u003e BUOYS; WATER-BASED PLATFORMS \u003e BUOYS \u003e MOORED; WATER-BASED PLATFORMS \u003e BUOYS \u003e MOORED \u003e BUOYS", "repo": "Environmental Data Initiative (EDI)", "repositories": "Environmental Data Initiative (EDI)", "science_programs": "LTER", "south": -77.0, "title": "LTER: MCM6 - The Roles of Legacy and Ecological Connectivity in a Polar Desert Ecosystem", "uid": "p0010440", "west": 162.87}, {"awards": "2301363 Kurth, Andrew; 2301362 Lazzara, Matthew", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "AMRC Automatic Weather Station project data, 1980 - present (ongoing).", "datasets": [{"dataset_uid": "200414", "doi": "10.48567/1hn2-nw60", "keywords": null, "people": null, "repository": "Antarctic Meteorological Research and Data Center", "science_program": null, "title": "AMRC Automatic Weather Station project data, 1980 - present (ongoing).", "url": "https://amrdcdata.ssec.wisc.edu/group/about/automatic-weather-station-project"}], "date_created": "Fri, 20 Oct 2023 00:00:00 GMT", "description": "The Antarctic Automatic Weather Station (AWS) program is a long-term automated surface weather observing network measuring key standard meteorological parameters, including temperature, humidity, wind speed and direction, barometric pressure, solar radiation, and snow accumulation. Observations from the network support weather forecasting, science research, and educational activities, and all data collected are made available to the public. This project will continue to maintain and operate the existing network. These data provide some of the only available weather observations in this very remote portion of the Earth. To ensure fidelity, observations are reviewed and checked for errors by a combination of automated methods and expert review, enabling the data to be used in a wide range of research areas. The project will be overseen by a team of scientists, researchers, and students, and a newly created AWS Advisory Board will provide independent input and guidance. The activities for this project will be focused on the continued operation of the AWS network, establishment of an AWS Advisory Board, student engagement and outreach activities. This project will continue to maintain the AWS systems while upgrading the real-time processing of meteorological data from the AWS network. The team will continue to adapt to changes communication methods to ensure that data is distributed widely and in a timely manner. Prior NSF investments in the Polar Climate and Weather Station (PCWS) are leveraged to develop a robust production version that can be reliably used year-round in Antarctica. AWS observations will be quality-controlled and placed into a database where the public will be able to search and select subsets of observations. To resolve conflicting radiation shield setups for temperature observations, the team plans to test different radiation shields (with and without aspiration) deployed for one year at South Pole Station. The project will be advised by an independent group of diverse peers through a newly developed AWS Advisory Board. The team will incorporate students from all levels in all aspects of the project, including in the research design, engineering and productions of the PCWS, and in field deployments. A concerted effort to engage the public will be undertaken via scaled-up interactions with television meteorologists from several states across the US to bring Antarctica to the public. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "AIR TEMPERATURE; HUMIDITY; SURFACE WINDS; INCOMING SOLAR RADIATION; Antarctica; SURFACE PRESSURE", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "paleo_time": null, "persons": "Lazzara, Matthew; Welhouse, Lee J; Mikolajczyk, David", "platforms": null, "repo": "Antarctic Meteorological Research and Data Center", "repositories": "Antarctic Meteorological Research and Data Center", "science_programs": null, "south": -90.0, "title": "Collaborative Research: The Automatic Weather Station Program: Antarctic Meteorological Sentinel Service 2024-2027", "uid": "p0010439", "west": -180.0}, {"awards": "2203176 Cimino, Megan; 2203177 Steinberg, Deborah", "bounds_geometry": "POLYGON((-80 -60,-77 -60,-74 -60,-71 -60,-68 -60,-65 -60,-62 -60,-59 -60,-56 -60,-53 -60,-50 -60,-50 -61,-50 -62,-50 -63,-50 -64,-50 -65,-50 -66,-50 -67,-50 -68,-50 -69,-50 -70,-53 -70,-56 -70,-59 -70,-62 -70,-65 -70,-68 -70,-71 -70,-74 -70,-77 -70,-80 -70,-80 -69,-80 -68,-80 -67,-80 -66,-80 -65,-80 -64,-80 -63,-80 -62,-80 -61,-80 -60))", "dataset_titles": null, "datasets": null, "date_created": "Thu, 10 Aug 2023 00:00:00 GMT", "description": "This project is co-funded by a collaboration between the Directorate for Geosciences and Office of Advanced Cyberinfrastructure to support Artificial Intelligence/Machine Learning and open science activities in the geosciences. Machine learning model will be used in this project to predict the distributions of five zooplankton species in the western Antarctic Peninsula (wAP) based on oceanographic properties. The project will take advantage of a long-term series collected by the Palmer Long-Term Ecological Research (LTER) program that collects annual data on physics, chemistry, phytoplankton (or food), zooplankton and predators (seabirds, whales and seals). By analyzing this dataset and combining it with other data collected by national and international programs, this project will provide understanding and prediction of zooplankton distribution and abundance in the wAP. The machine learning models will be based on environmental properties extracted from remote sensing images thus providing ecosystem knowledge as it decreases human footprint in Antarctica. The relationship between species distribution and habitat are key for distinguishing natural variability from climate impacts on zooplankton and their predators. This research benefits NSF mission by expanding fundamental knowledge of Antarctic systems, biota, and processes as well as aligning with data and sample reuse strategies in Polar Research. The project will benefit society by supporting two female early-career scientists, a post-doctoral fellow and a graduate student. Polar literacy will be promoted through an existing partnership with Out Of School activities that target Science, Technology, Engineering and Mathematics (STEM) education, expected to reach 120,000 students from under-represented minorities in STEM annually. The project will also contribute to evaluate the ecosystem in the proposed Marine Protected Area in the wAP, subject to krill fishery. Results will be made available publicly through an interactive web application. The Principal Investigators propose to address three main questions: 1) Can geomorphic features, winter preconditioning and summer ocean conditions be used to predict the austral summer distribution of zooplankton species along the wAP? 2) What are the spatial and temporal patterns in modeled zooplankton species distribution along the wAP? And 3) What are the patterns of overlap in zooplankton and predator species? The model will generate functional relationships between zooplankton distribution and environmental variables and provide Zooplankton Distribution Models (ZDMs) along the Antarctic Peninsula. The Palmer LTER database will be combined with the NOAA AMLR data for the northern wAP, and KRILLBASE, made public by the British Antarctic Survey\u2019s Polar Data Center. This project will generate 1) annual environmental spatial layers on the Palmer LTER resolution grid within the study region, 2) annual species-specific standardized zooplankton net data from different surveys, 3) annual species-specific predator sightings on a standardized grid, and 4) ecological model output. Ecological model output will include annual predictions of zooplankton species distributions, consisting of 3-dimensional fields (x,y,t) for the 5 main zooplankton groups, including Antarctic krill, salps and pteropods. Predictions will be derived from merging in situ survey data with environmental data, collected in situ or by remote sensing. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": -50.0, "geometry": "POINT(-65 -65)", "instruments": null, "is_usap_dc": true, "keywords": "ANIMAL ECOLOGY AND BEHAVIOR; PELAGIC; BIRDS; SPECIES/POPULATION INTERACTIONS; ANIMALS/INVERTEBRATES; Antarctic Peninsula", "locations": "Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Cimino, Megan; Steinberg, Deborah", "platforms": null, "repositories": null, "science_programs": null, "south": -70.0, "title": "Collaborative Research: Harvesting Long-term Survey Data to Develop Zooplankton Distribution Models for the Antarctic Peninsula", "uid": "p0010429", "west": -80.0}, {"awards": "1542902 Chereskin, Teresa; 2001646 Chereskin, Teresa", "bounds_geometry": "POLYGON((-68 -54,-66.7 -54,-65.4 -54,-64.1 -54,-62.8 -54,-61.5 -54,-60.2 -54,-58.9 -54,-57.6 -54,-56.3 -54,-55 -54,-55 -55,-55 -56,-55 -57,-55 -58,-55 -59,-55 -60,-55 -61,-55 -62,-55 -63,-55 -64,-56.3 -64,-57.6 -64,-58.9 -64,-60.2 -64,-61.5 -64,-62.8 -64,-64.1 -64,-65.4 -64,-66.7 -64,-68 -64,-68 -63,-68 -62,-68 -61,-68 -60,-68 -59,-68 -58,-68 -57,-68 -56,-68 -55,-68 -54))", "dataset_titles": "Joint Archive for shipboard ADCP data; World Ocean Database", "datasets": [{"dataset_uid": "200355", "doi": "", "keywords": null, "people": null, "repository": "NCEI", "science_program": null, "title": "World Ocean Database", "url": "https://www.nodc.noaa.gov/OC5/SELECT/dbsearch/dbsearch.html"}, {"dataset_uid": "200354", "doi": "", "keywords": null, "people": null, "repository": "NCEI", "science_program": null, "title": "Joint Archive for shipboard ADCP data", "url": "https://uhslc.soest.hawaii.edu/sadcp/"}], "date_created": "Fri, 03 Mar 2023 00:00:00 GMT", "description": "Part 1: On frequent crossings of the Drake Passage on the US Antarctic vessel ARSV Laurence M. Gould, a range of underway measurements are taken. These data represent one of the few repeat year around shipboard measurements in the Southern Ocean. With close to two decades of data now available, the primary science objectives of this proposal are to continue to analyze the Drake Passage time series. Part 2: Some of the analyses are (1) describe and relate the seasonal and long-term ocean energy distribution to wind, buoyancy and topographic forcing and sinks, and (2) describe and relate seasonal and long-term changes in the ACC fronts, water masses and upwelling to biogeochemical and climate variability. High-resolution, near-repeat Expendable Bathythermograph (XBT) and Acoustic Doppler Current Profiler (ADCP) transect sampling in Drake Passage is thus used to study modes of variability in ocean temperature, salinity, currents and backscatter in the Antarctic Circumpolar Current (ACC) on seasonal to interannual time frames, and on space scales from current cores to eddies. This project is a continuation of the longstanding support for collecting the ADCP and other underway data on USAP vessels, such as the ASRV Laurence M Gould This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": -55.0, "geometry": "POINT(-61.5 -59)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e XBT; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e ADCP", "is_usap_dc": true, "keywords": "R/V LMG; Drake Passage; WATER TEMPERATURE; Antarctic Circumpolar Current; Heat Flux", "locations": "Drake Passage", "north": -54.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Chereskin, Teresa; Sprintall, Janet", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V LMG", "repo": "NCEI", "repositories": "NCEI", "science_programs": null, "south": -64.0, "title": "High Resolution Underway Air-Sea Observations in Drake Passage for Climate Science", "uid": "p0010409", "west": -68.0}, {"awards": "2220968 Stewart, Andrew; 2220969 Manucharyan, Georgy", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": null, "datasets": null, "date_created": "Sun, 07 Aug 2022 00:00:00 GMT", "description": "The world ocean is continuously in motion, and a large fraction of this motion takes the form of \"eddies\", nearly-horizontal swirls of water spanning tens to hundreds of kilometers. These eddies affect the ocean by mediating large-scale currents, redistributing heat, and supplying nutrients to oceanic ecosystems. Consequently, the ocean science community has historically invested substantial effort in characterizing the properties and impact of these eddies. In polar regions, the sea ice cover inhibits observations of eddies, and the relatively small horizontal size of the eddies hampers computer simulations of their behavior. Nonetheless, previous studies have identified an active population of eddies beneath the Arctic sea ice and shown that these eddies play a crucial role in maintaining the large-scale circulation in the Arctic seas. However, there has been no systematic attempt to study such eddies under Antarctic sea ice, leaving a significant gap in our understanding of eddies and their contribution to the large-scale ocean circulation around Antarctica. The proposed research combines multiple approaches to improve our understanding of the eddy dynamics. Statistical characterizations of the sub-sea ice eddy field will be derived using hydrographic observations under Antarctic sea ice from Argo floats and instrumented seals. High-resolution global ocean and sea ice models will be used to track the simulated eddies back to their formation sites to identify the eddy formation mechanisms. Theoretical calculations will be conducted to test the hypothesis that the eddies primarily originate from hydrodynamic instabilities associated with subsurface density gradients. These theoretical, modeling, and data analysis approaches will be combined to estimate the eddies\u0027 contribution to lateral tracer transports and their impact on mean circulations of the near-Antarctic ocean. The proposed work will facilitate future scientific endeavors by providing publicly-available databases of detected eddy properties. This project will support the research of several junior scientists: an undergraduate student, two graduate students, and an early-career faculty member. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Antarctica; OCEAN CURRENTS", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Stewart, Andrew; Bianchi, Daniele", "platforms": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Collaborative Research: Characteristics and Origins of Eddies beneath Antarctic Sea Ice", "uid": "p0010366", "west": -180.0}, {"awards": "2147553 Rotella, Jay; 2147554 Chen, Nancy; 1640481 Rotella, Jay", "bounds_geometry": "POLYGON((162 -74.95,162.8 -74.95,163.6 -74.95,164.4 -74.95,165.2 -74.95,166 -74.95,166.8 -74.95,167.6 -74.95,168.4 -74.95,169.2 -74.95,170 -74.95,170 -75.295,170 -75.64,170 -75.985,170 -76.33,170 -76.67500000000001,170 -77.02000000000001,170 -77.36500000000001,170 -77.71000000000001,170 -78.055,170 -78.4,169.2 -78.4,168.4 -78.4,167.6 -78.4,166.8 -78.4,166 -78.4,165.2 -78.4,164.4 -78.4,163.6 -78.4,162.8 -78.4,162 -78.4,162 -78.055,162 -77.71000000000001,162 -77.36500000000001,162 -77.02000000000001,162 -76.67500000000001,162 -76.33,162 -75.985,162 -75.64,162 -75.295,162 -74.95))", "dataset_titles": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2023 Antarctic field season", "datasets": [{"dataset_uid": "601837", "doi": "10.15784/601837", "keywords": "AMD; Amd/Us; Antarctica; Cryosphere; McMurdo Sound; Population Dynamics; USA/NSF; USAP-DC; Weddell Seal", "people": "Rotella, Jay", "repository": "USAP-DC", "science_program": null, "title": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2023 Antarctic field season", "url": "https://www.usap-dc.org/view/dataset/601837"}], "date_created": "Sun, 07 Aug 2022 00:00:00 GMT", "description": "Part 1: Non-technical description This is a continuation of a long-term population dynamics study (1978-present) using an intensive mark-recapture tagging of Weddell seals in Erebus Bay, Antarctica. Past work has become a global model for population studies of large animals. Results have documented strong annual variation in reproduction, abundance, and population composition. This program will add components to evaluate the demographic role of immigrant mothers, evaluate possible drivers of annual variation in overall population dynamics, assess genetic differences between immigrant and locally born mothers, and document patterns of gene flow among seal colonies in the Ross Sea region. These new aspects will focus on understanding of population structure, function, and genetics and provide key information for predicting how the seal population will respond to environmental change. The addition of genetic approaches will advance available data for multiple groups in multiple countries working on Weddell Seals. This work includes an early career scientists training program for faculty university graduate and undergraduate students and well as a defined program for data sharing. The research is paired with active education and outreach programs, social media, websites, educational resources, videos and high-profile public lecture activities. The informal science education program will expand on the project\u2019s successful efforts at producing and delivering short-form videos that have been viewed over 1.6 million times to date. In addition, the education program will add new topics such as learning about seals using genomics and how seals respond to a changing world to a multimedia-enhanced electronic book about the project\u2019s long-term research on Weddell seals, which will be freely available to the public early in the project. Part 2: Technical description Reliable predictions are needed for how populations of wild species, especially those at high latitudes, will respond to future environmental conditions. This study will use a strategic extension of the long-term demographic research program that has been conducted annually on the Erebus Bay population of Weddell seals since 1978 to help meet that need. Recent analyses of the study population indicate strong annual variation in reproduction, abundance, and population composition. The number of new immigrant mothers that join the population each year has recently grown such that most new mothers are now immigrants. Despite the growing number of immigrants, the demographic importance and geographic origins of immigrants are unknown. The research will (1) add new information on drivers of annual variation in immigrant numbers, (2) compare and combine information on the vital rates and demographic role of immigrant females and their offspring with that of locally born females, and (3) add genomic analyses that will quantify levels of genetic variation in and gene flow among the study population and other populations in the Ross Sea. The project will continue the long-term monitoring of the population at Erebus Bay and characterize population dynamics and the role of immigration using a combination of mark-recapture analyses, stochastic population modeling, and genomic analyses. The study will continue to provide detailed data on individual seals to other science teams, educate and mentor individuals in the next generation of ecologists, introduce two early-career, female scientists to Antarctic research, and add genomics approaches to the long-term population study of Erebus Bay Weddell seals. The research will be complemented with a robust program of training and an informal science education program. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 170.0, "geometry": "POINT(166 -76.67500000000001)", "instruments": null, "is_usap_dc": true, "keywords": "SPECIES/POPULATION INTERACTIONS; McMurdo Sound", "locations": "McMurdo Sound", "north": -74.95, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Rotella, Jay; Chen, Nancy", "platforms": null, "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.4, "title": "Collaborative Research: The Drivers and Role of Immigration in the Dynamics of the Largest Population of Weddell Seals in Antarctica under Changing Conditions", "uid": "p0010361", "west": 162.0}, {"awards": "1744771 Balco, Gregory", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "5 million year transient Antarctic ice sheet model run with \"desensitized\" marine ice margin instabilities; 5 million year transient Antarctic ice sheet model run with \"sensitized\" marine ice margin instabilities", "datasets": [{"dataset_uid": "601601", "doi": "10.15784/601601", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "people": "Halberstadt, Anna Ruth; Balco, Gregory; Buchband, Hannah", "repository": "USAP-DC", "science_program": null, "title": "5 million year transient Antarctic ice sheet model run with \"desensitized\" marine ice margin instabilities", "url": "https://www.usap-dc.org/view/dataset/601601"}, {"dataset_uid": "601602", "doi": "10.15784/601602", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "people": "Buchband, Hannah; Balco, Gregory; Halberstadt, Anna Ruth", "repository": "USAP-DC", "science_program": null, "title": "5 million year transient Antarctic ice sheet model run with \"sensitized\" marine ice margin instabilities", "url": "https://www.usap-dc.org/view/dataset/601602"}], "date_created": "Tue, 21 Jun 2022 00:00:00 GMT", "description": "The purpose of this project is to use geological data that record past changes in the Antarctic ice sheets to test computer models for ice sheet change. The geologic data mainly consist of dated glacial deposits that are preserved above the level of the present ice sheet, and range in age from thousands to millions of years old. These provide information about the size, thickness, and rate of change of the ice sheets during past times when the ice sheets were larger than present. In addition, some of these data are from below the present ice surface and therefore also provide some information about past warm periods when ice sheets were most likely smaller than present. The primary purpose of the computer model is to predict future ice sheet changes, but because significant changes in the size of ice sheets are slow and likely occur over hundreds of years or longer, the only way to determine whether these models are accurate is to test their ability to reproduce past ice sheet changes. The primary purpose of this project is to carry out such a test. The research team will compile relevant geologic data, in some cases generate new data by dating additional deposits, and develop methods and software to compare data to model simulations. In addition, this project will (i) contribute to building and sustaining U.S. science capacity through postdoctoral training in geochronology, ice sheet modeling, and data science, and (ii) improve public access to geologic data and model simulations relevant to ice sheet change through online database and website development. Technical aspects of this project are primarily focused on the field of cosmogenic-nuclide exposure-dating, which is a method that relies on the production of rare stable and radio-nuclides by cosmic-ray interactions with rocks and minerals exposed at the Earth\u0027s surface. Because the advance and retreat of ice sheets results in alternating cosmic-ray exposure and shielding of underlying bedrock and surficial deposits, this technique is commonly used to date and reconstruct past ice sheet changes. First, this project will contribute to compiling and systematizing a large amount of cosmogenic-nuclide exposure age data collected in Antarctica during the past three decades. Second, it will generate additional geochemical data needed to improve the extent and usefulness of measurements of stable cosmogenic nuclides, cosmogenic neon-21 in particular, that are useful for constraining ice-sheet behavior on million-year timescales. Third, it will develop a computational framework for comparison of the geologic data set with existing numerical model simulations of Antarctic ice sheet change during the past several million years, with particular emphasis on model simulations of past warm periods, for example the middle Pliocene ca. 3-3.3 million years ago, during which the Antarctic ice sheets are hypothesized to have been substantially smaller than present. Fourth, guided by the results of this comparison, it will generate new model simulations aimed at improving agreement between model simulations and geologic data, as well as diagnosing which processes or parameterizations in the models are or are not well constrained by the data. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "BERYLLIUM-10 ANALYSIS; AMD; ICE SHEETS; GLACIATION; Amd/Us; LABORATORY; USA/NSF; Antarctica; ALUMINUM-26 ANALYSIS; USAP-DC", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "paleo_time": null, "persons": "Balco, Gregory", "platforms": "OTHER \u003e PHYSICAL MODELS \u003e LABORATORY", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements", "uid": "p0010342", "west": -180.0}, {"awards": "2032029 Gerken, Sarah", "bounds_geometry": "POLYGON((-70 -62,-68.5 -62,-67 -62,-65.5 -62,-64 -62,-62.5 -62,-61 -62,-59.5 -62,-58 -62,-56.5 -62,-55 -62,-55 -62.8,-55 -63.6,-55 -64.4,-55 -65.2,-55 -66,-55 -66.8,-55 -67.6,-55 -68.4,-55 -69.2,-55 -70,-56.5 -70,-58 -70,-59.5 -70,-61 -70,-62.5 -70,-64 -70,-65.5 -70,-67 -70,-68.5 -70,-70 -70,-70 -69.2,-70 -68.4,-70 -67.6,-70 -66.8,-70 -66,-70 -65.2,-70 -64.4,-70 -63.6,-70 -62.8,-70 -62))", "dataset_titles": "Expedition Data of NBP2303; Invertebrate Zoology", "datasets": [{"dataset_uid": "200386", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data of NBP2303", "url": "https://www.rvdata.us/search/cruise/NBP2303"}, {"dataset_uid": "200385", "doi": "", "keywords": null, "people": null, "repository": "Alabama Museum of Natural History, University of Alabama, Tuscaloosa", "science_program": null, "title": "Invertebrate Zoology", "url": "https://arctos.database.museum/"}], "date_created": "Mon, 13 Jun 2022 00:00:00 GMT", "description": "Ocean communities play an important role in determining the natural and human impacts of global change. The most conspicuous members of those communities are generally large vertebrates such as marine mammals and sea birds. But smaller animals often determine how the changes impact those charismatic animals. In the Antarctic, where some of the most dramatic physical changes are taking place, we do not know much about what small animals exist. This project will sample the sub-Antarctic and three different Antarctic seas with a hope of identifying, quantifying and discovering the variation in species of a group of small invertebrates. Comma shrimp, also called cumaceans, are rarely seen elsewhere but may be common and important in the communities of these locations. Antarctic sampling traditionally used gear that was not very effective at catching cumaceans so we do not know what species exist there and how common they are. This study will utilize modern sampling methods that will allow comma shrimp to be sampled. This will lead to discoveries about the diversity and abundance of comma shrimp, as well as their relationship to other invertebrate species. Major impacts of this work will be an enhancement of museum collections, the development of description of all the comma shrimp of Antarctica including new and unnamed species. Those contributions may be especially important as we strive to understand what drives the dynamics of charismatic vertebrates and fisheries that are tied to Antarctic food webs. This project will collect cumaceans from benthic samples from Argentinian waters, Bransfield Strait, and the Weddell Sea using benthic sleds. Specimens will be fixed in 95% ethanol and preserved in 95% ethanol and 5% glycerin to preserve both morphology and DNA. The specimens will form the basis for a monograph synthesizing current knowledge on the Subantarctic and Antarctic Cumacea, including diagnoses of all species, descriptions of new species, additional description for currently unknown life stages of known species, and vouchered gene sequences for all species collected. The monograph will include keys to all families, genera and species known from the region. Monographic revisions that include identification resources are typically useful for decades to a broad spectrum of other scientists. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": -55.0, "geometry": "POINT(-62.5 -66)", "instruments": null, "is_usap_dc": true, "keywords": "AMD; NSF/USA; ANIMALS/INVERTEBRATES; SHIPS; USAP-DC; NBP2303; Weddell Sea; Amd/Us; Antarctic Peninsula", "locations": "Antarctic Peninsula; Weddell Sea", "north": -62.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Gerken, Sarah", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e SHIPS", "repo": "R2R", "repositories": "Alabama Museum of Natural History, University of Alabama, Tuscaloosa; R2R", "science_programs": null, "south": -70.0, "title": "RAPID: Monographing the Antarctic and Subantarctic Cumacea", "uid": "p0010338", "west": -70.0}, {"awards": "1443637 Zakon, Harold", "bounds_geometry": null, "dataset_titles": "Evolutionary analysis of transient receptor potential (TRP) channels in notothenioid fishes; Functional characterization of temperature activated ion channels from Antarctic fishes; TagSeq tissue specific expression data for Antarctic Harpagifer antarcticus and tropical African cichlid Astatotilapia (Haplochromis) burtoni", "datasets": [{"dataset_uid": "200292", "doi": "10.18738/T8/NXGNEI", "keywords": null, "people": null, "repository": "Texas Data Repository", "science_program": null, "title": "Evolutionary analysis of transient receptor potential (TRP) channels in notothenioid fishes", "url": "https://doi.org/10.18738/T8/NXGNEI"}, {"dataset_uid": "200293", "doi": "", "keywords": null, "people": null, "repository": "GenBank", "science_program": null, "title": "TagSeq tissue specific expression data for Antarctic Harpagifer antarcticus and tropical African cichlid Astatotilapia (Haplochromis) burtoni", "url": "https://www.ncbi.nlm.nih.gov/bioproject/PRJNA758918"}, {"dataset_uid": "601695", "doi": "10.15784/601695", "keywords": "Antarctica; Notothenioid; Southern Ocean", "people": "York, Julia", "repository": "USAP-DC", "science_program": null, "title": "Functional characterization of temperature activated ion channels from Antarctic fishes", "url": "https://www.usap-dc.org/view/dataset/601695"}], "date_created": "Fri, 03 Jun 2022 00:00:00 GMT", "description": "This project studies how the proteins of the nerves and muscles of fish that live in Antarctica function in the cold, which should provide information on the function of these same proteins in all animals, including humans. These proteins, called ion channels, open and close to allow ions (atoms or molecules with electrical charge) to flow into or out of cells which causes the electrical activity of nerves and muscles. Mutations that influence this process are the basis of numerous human disorders such as epilepsy, heart arrhythmias, and muscle paralysis. Thus, it is important to understand what parts of the proteins govern these transitions. The speed with which channels open and close depends on temperature. Human ion channels transition slowly when we are cold, which is why we become numb in the cold. Yet Antarctic fish, called icefish, are active at freezing temperatures that drastically limit the activity of human ion channels. The investigators have evidence that specific alterations in the icefishs\u0027 ion channels allow their channels to operate differently in the cold and they will use gene discovery and biophysical methods to test how these changes alter the transitions of icefish proteins at different temperatures. The project will also further the NSF goals of training new generations of scientists and of making scientific discoveries available to the general public. The gene discovery analysis will be done by undergraduate students including those from a minority-serving university and the investigators will develop a new course which will also serve students at that institution and elsewhere. In addition, the investigators will participate in educational outreach events with the general public as well as with groups with special needs. Notothenioid fishes are one of the most successful groups of vertebrates in Antarctica. Notothens have adaptations to the freezing water they inhabit and this project will study how their voltage-gated ion channels (VGICs) function in the cold. The molecular movements of ion channels are severely impaired by cold, yet notothens function at temperatures that would paralyze the nerves and muscles of \"cold-blooded\" temperate zone animals. Surprisingly, no biophysical or molecular investigations have been conducted on notothen VGICs. The investigators have preliminary data that amino acid substitutions occur at sites in VGICs that are evolutionarily conserved from fruit flies to humans. Some of these sites are known to impact channel function and the role of others in channel transitioning are unknown. The results from studying them will provide novel information also applicable to non-notothen, perhaps even human, VGICs as well as providing insights into how VGICs adapt to the cold. The project will biophysically characterize notothen VGICs using voltage-clamp techniques will and compare their properties over a range of temperatures to the same channel from two temperate zone fish. The role of unique notothen amino acid substitutions will be characterized by mutagenesis. One specific aim will be a project in which undergraduates mine notothen sequence databases to identify other potential amino acid substitutions in VGICs that might facilitate adaptation to the cold.", "east": null, "geometry": null, "instruments": null, "is_usap_dc": true, "keywords": "Amd/Us; USAP-DC; USA/NSF; FIELD INVESTIGATION; AMD; FISHERIES", "locations": null, "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Zakon, Harold", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION", "repo": "Texas Data Repository", "repositories": "GenBank; Texas Data Repository; USAP-DC", "science_programs": null, "south": null, "title": "Analysis of Voltage-gated Ion Channels in Antarctic Fish", "uid": "p0010331", "west": null}, {"awards": "1744835 Wagner, Till; 1744800 Adcroft, Alistair", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Model of iceberg drift and decay including breakup", "datasets": [{"dataset_uid": "601510", "doi": "10.15784/601510", "keywords": "Antarctica; Footloose Mechanism; Iceberg Breakup; Iceberg Decay; Model; Southern Ocean", "people": "England, Mark; Wagner, Till", "repository": "USAP-DC", "science_program": null, "title": "Model of iceberg drift and decay including breakup", "url": "https://www.usap-dc.org/view/dataset/601510"}], "date_created": "Tue, 18 Jan 2022 00:00:00 GMT", "description": "Icebergs are a component of the Antarctic climate system, yet a comprehensive representation of their dynamics in climate models has remained elusive. Representing the role of icebergs in global climate models (GCMs) poses a formidable challenge to the scientific community. The most striking shortcoming of current iceberg models is arguably that they do not represent giant tabular icebergs, even though giant icebergs carry most of the freshwater stored in icebergs in the Southern Ocean. This lack of large icebergs in models is mostly due to the difficulties associated with adequately modeling iceberg decay. In particular, fracturing and breakup are not typically considered in iceberg models, despite being dominant iceberg decay processes. Investigators are to address these issues using a hierarchy of iceberg models, ranging from an idealized analytical model to a comprehensive GCM, in concert with recent observational data. The main objective of this study is to develop a new iceberg model that: (i) accounts for iceberg breakup and fracturing processes that have been neglected to date, (ii) improves on the representation of iceberg decay processes that were considered in previous models, (iii) explicitly represents large tabular icebergs. The primary broader impact of the proposed work will be through a K-12 teacher workshop series showcasing this project as an example of how scientists develop physical models. Ongoing changes in the California K-12 science standards will enable the teachers to creatively use this material in their classrooms. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Amd/Us; ICEBERGS; USA/NSF; Southern Ocean; AMD; USAP-DC; COMPUTERS", "locations": "Southern Ocean", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Wagner, Till; Eisenman, Ian", "platforms": "OTHER \u003e MODELS \u003e COMPUTERS", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Modeling Giant Icebergs and Their Decay", "uid": "p0010290", "west": -180.0}, {"awards": "1951500 Jenouvrier, Stephanie", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Data from: Individual life histories: Neither slow nor fast, just diverse; Evo-Demo Hyperstate Matrix Model Code Repository; Hyperstate matrix model reveals the influence of personality on demography; Individual life histories: neither slow nor fast, just diverse; Plastic Behaviour Buffers Climate Variability in the Wandering Albatross; Strong winds reduce foraging success in albatrosses; Subtropical anticyclone impacts life-history traits of a marine top predator; The impact of boldness on demographic rates and lifehistory outcomes in the wandering albatross", "datasets": [{"dataset_uid": "200459", "doi": "https://doi.org/10.5281/zenodo.13881532", "keywords": null, "people": null, "repository": "ZENODO", "science_program": null, "title": "Strong winds reduce foraging success in albatrosses", "url": "https://zenodo.org/records/13881532"}, {"dataset_uid": "601770", "doi": "10.15784/601770", "keywords": "Antarctica; Cryosphere; Demography; Sub-Antarctic", "people": "Joanie, Van de Walle; Jenouvrier, Stephanie", "repository": "USAP-DC", "science_program": null, "title": "The impact of boldness on demographic rates and lifehistory outcomes in the wandering albatross", "url": "https://www.usap-dc.org/view/dataset/601770"}, {"dataset_uid": "200458", "doi": "https://doi.org/10.5061/dryad.3bk3j9kpm", "keywords": null, "people": null, "repository": "DRYAD", "science_program": null, "title": "Individual life histories: neither slow nor fast, just diverse", "url": "https://doi.org/10.6084/m9.figshare.c.6181063."}, {"dataset_uid": "200457", "doi": " https://zenodo.org/doi/10.5281/zenodo.10887354", "keywords": null, "people": null, "repository": "ZENODO", "science_program": null, "title": "Plastic Behaviour Buffers Climate Variability in the Wandering Albatross", "url": "https://zenodo.org/records/14290546"}, {"dataset_uid": "200456", "doi": "", "keywords": null, "people": null, "repository": "GITHUB", "science_program": null, "title": "Subtropical anticyclone impacts life-history traits of a marine top predator", "url": "https://github.com/fledge-whoi/Alba_Mascarene-High"}, {"dataset_uid": "200455", "doi": "", "keywords": null, "people": null, "repository": "GITHUB", "science_program": null, "title": "Hyperstate matrix model reveals the influence of personality on demography", "url": "https://github.com/fledge-whoi/HyperstateWApopulationmodel"}, {"dataset_uid": "200454", "doi": "", "keywords": null, "people": null, "repository": "GITHUB", "science_program": null, "title": "Evo-Demo Hyperstate Matrix Model Code Repository", "url": "https://github.com/fledge-whoi/Eco-EvoHyperstateModel"}, {"dataset_uid": "200453", "doi": "10.5061/dryad.3bk3j9kpm", "keywords": null, "people": null, "repository": "Dryad", "science_program": null, "title": "Data from: Individual life histories: Neither slow nor fast, just diverse", "url": "https://doi.org/10.5061/dryad.3bk3j9kpm"}], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "Part I: Nontechnical description: This award represents a collaborative geoscience research effort between US NSF and UK Natural Environment Research Council (NERC) researchers with efforts in each nation funded by their respective countries (Dear Colleague Letter NSF 16-132). The research will focus on understanding the links between behavior, ecology, and evolution in a Southern Ocean wandering albatross population in response to global changes in climate and in exploitation of natural resources. The most immediate response of animals to global change typically is behavioral, and this work will provide a more comprehensive understanding of how differences individual bird behavior affect evolution and adaptation for the population under changing environments. Characterization of albatross personality, life-history traits, and population dynamics collected over long time scales will be used to develop robust forecasting of species persistence in the face of future global changes. The results of this project will feed into conservation and management decisions for endangered Southern Ocean species. The work will also be used to provide specific research training at all levels, including a postdoctoral scholar, graduate students and K-12 students. It will also support education for the public about impacts from human-induced activities on our polar ecosystems using animations, public lectures, printed and web media. Part II: Technical description Past research has shown that individual animal personalities range over a continuum of behavior, such that some individuals are consistently more aggressive, more explorative, and bolder than others. How the phenotypic distributions of personality and foraging behavior types within a population is created and maintained by ecological (demographic and phenotypic plasticity) and evolutionary (heritability) processes remain an open question. Differences in personality traits determine how individuals acquire resources and how they allocate these to reproduction and survival. Although some studies have found different foraging behaviors or breeding performances between personality types, none have established the link between personality differences in foraging behaviors and life histories (both reproduction and survival, and their covariations) in the context of global change. Furthermore, plasticity in foraging behaviors is not considered in the pace-of-life syndrome, which has potentially hampered our ability to find covariation between personality and life history trade-off. This project will fill these knowledge gaps and develop an eco-evolutionary model of the complex interactions among individual personality and foraging plasticity, heritability of personality and foraging behaviors, life history strategies, population dynamics in a changing environment (fisheries and climate) using a long-term database consisting of ~1,800 tagged wandering albatross seabirds (Diomedea exulans) with defined individual personalities and life history traits breeding in the Southern Ocean. Climate projections from IPCC atmospheric-oceanic global circulation models will be used to provide projections of population structure under future global change conditions. Specifically, the team will (1) characterize the differences in life history strategies along the shy-bold continuum of personalities and across environmental conditions; (2) develop the link between phenotypic plasticity in foraging effort and personality; (3) characterize the heritability of personality and foraging behaviors; (4) develop a stochastic eco-evolutionary model to predict population growth rates in a changing environment. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "USAP-DC; AMD; ECOLOGICAL DYNAMICS; OCEAN TEMPERATURE; USA/NSF; Antarctica; FIELD INVESTIGATION; SPECIES/POPULATION INTERACTIONS; PENGUINS; Amd/Us", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Integrated System Science", "paleo_time": null, "persons": "Jenouvrier, Stephanie; Patrick, Samantha", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION", "repo": "ZENODO", "repositories": "Dryad; DRYAD; GITHUB; USAP-DC; ZENODO", "science_programs": null, "south": -90.0, "title": "NSFGEO-NERC: Integrating Individual Personality Differences in the Evolutionary Ecology of a Seabird in the Rapidly Changing Polar Environment", "uid": "p0010283", "west": -180.0}, {"awards": "2138556 Halberstadt, Anna Ruth", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "5 million year transient Antarctic ice sheet model run with \"desensitized\" marine ice margin instabilities; 5 million year transient Antarctic ice sheet model run with \"sensitized\" marine ice margin instabilities", "datasets": [{"dataset_uid": "601601", "doi": "10.15784/601601", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "people": "Halberstadt, Anna Ruth; Balco, Gregory; Buchband, Hannah", "repository": "USAP-DC", "science_program": null, "title": "5 million year transient Antarctic ice sheet model run with \"desensitized\" marine ice margin instabilities", "url": "https://www.usap-dc.org/view/dataset/601601"}, {"dataset_uid": "601602", "doi": "10.15784/601602", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "people": "Buchband, Hannah; Balco, Gregory; Halberstadt, Anna Ruth", "repository": "USAP-DC", "science_program": null, "title": "5 million year transient Antarctic ice sheet model run with \"sensitized\" marine ice margin instabilities", "url": "https://www.usap-dc.org/view/dataset/601602"}], "date_created": "Tue, 09 Nov 2021 00:00:00 GMT", "description": "Geologic data provide crucial insights into Antarctic Ice Sheet dynamics; for example, progressive exposure of mountain peaks emerging from the ice sheet reveal ice elevation changes, and the past \u2018footprint\u2019 of marine-based ice sheets is imprinted on the seafloor. Numerical ice sheet simulations can link these geologic records in space and time to make larger-scale inferences about continent-wide ice sheet evolution. This work integrates both marine and terrestrial geologic datasets with numerical simulations to investigate Antarctic Ice Sheet behavior (and contribution to global sea level) throughout the last deglaciation, ~20,000 years ago until present. Specifically, this research addresses two issues regarding the relationship between simulations and data and their use in reconstructing past ice-sheet behavior: (1) Geologic records from the modern seafloor suggest significantly earlier retreat of marine-based ice compared to terrestrial records of mountain peak exposure (ice thinning). Computer experiments investigate several hypotheses for this mismatch in timing. (2) Exposure age data (terrestrial measurements recording ice elevation changes) are often interpreted to reflect ice dynamics hundreds of kilometers away from the study site. This work uses simulations to explore the linkage between ice elevation changes \u2018upstream\u2019 as glaciers flow through mountainous regions and ice dynamics further \u2018downstream\u2019 where ice contacts the ocean. This work will produce a publicly available, customizable, and easily accessible toolkit for comparing simulations and data, including a database of geologic records to use as constraints. The project is interdisciplinary, bridging a communication gap between the ice-sheet simulations and geologic data-collecting communities. This project combines numerical simulations and geologic data to explore fundamental knowledge gaps regarding the interpretation and use of marine and terrestrial datasets. This work will produce an ensemble of continent-wide coupled ice sheet and glacial isostatic adjustment simulations, constrained with comprehensive existing geologic data, to reproduce a history of deglacial Antarctic Ice Sheet evolution that is compatible with the geologic record as well as glaciologically and gravitationally self-consistent. Comparison between simulations and data is improved through high-resolution nested ice sheet modeling techniques, which provide unprecedented context for exposure age data generally located in regions of complex topography. Numerical simulations will be performed with systematically varied parameters and boundary conditions, and can thus support an investigation of (1) chronological mismatches between terrestrial thinning and marine ice sheet retreat during the mid-Holocene, and (2) how marine grounding-line dynamics are propagated upstream to coastal outlet glaciers and further interior under a variety of different scenarios. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Antarctic Ice Sheet; GLACIERS/ICE SHEETS; USAP-DC; USA/NSF; MODELS; AMD; Amd/Us", "locations": "Antarctic Ice Sheet", "north": -60.0, "nsf_funding_programs": "Post Doc/Travel", "paleo_time": null, "persons": "Halberstadt, Anna Ruth", "platforms": "OTHER \u003e MODELS \u003e MODELS", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "OPP-PRF: High-resolution Nested Antarctic Ice Sheet Modeling to Reconcile Marine and Terrestrial Geologic Data", "uid": "p0010278", "west": -180.0}, {"awards": "2230824 Nitsche, Frank; 1936530 Carbotte, Suzanne", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": null, "datasets": null, "date_created": "Fri, 05 Nov 2021 00:00:00 GMT", "description": "Samples and data obtained by researchers working in Antarctica are valuable, unique assets which typically require a substantial and expensive logistical effort to acquire. Preservation of these data increases the return on the significant public investment for acquisition, enabling future re-use for new analyses, and ensure that data behind scientific publications are available for others to review. The US Antarctic Program Data Center (USAP-DC) will provide an open-disciplinary hybrid repository for project metadata and the diverse research data obtained from the Antarctic region by NSF funded researchers for which other data repositories do not exist. In addition, a Project Catalog will provide a single online resource for the US Antarctic scientific community to manage information about their research activities and will link project metadata to the various distributed repositories where Antarctic data resides. In doing so, the USAP-DC will follow community best practices and standards to ensure data are citable, shareable, and discoverable. It will also facilitate registration of data descriptions into the Antarctic Master Directory to meet US goals for data sharing under the International Antarctic Treaty. With full open access to interfaces to search for and download data, USAP-DC will make a wide range of data products resulting from NSF funded research in Antarctica available not only to the research community but also to the broader public. The data center is operated using community standards for metadata and data access which helps ensure data re-usability into the future. The new Project catalog, which is designed to support consolidation of information on research products of USAP awards over the lifetime of a project, will make it simpler for NSF program managers, but also for individual researchers and especially larger collaborative research groups to keep track of datasets and related information produced as part of their projects. Through tutorials and meetings at conferences USAP-DC will contribute to raise awareness and inform the research community, especially new investigators about data management best practices. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "USA/NSF; Antarctica; Amd/Us; PALEOCLIMATE RECONSTRUCTIONS; GLACIERS/ICE SHEETS; COMPUTERS; ICE CORE RECORDS; SNOW/ICE; Database; ECOLOGICAL DYNAMICS; USAP-DC; OCEAN CHEMISTRY; AMD", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Polar Cyberinfrastructure; Polar Cyberinfrastructure", "paleo_time": null, "persons": "Carbotte, Suzanne; Tinto, Kirsty; Nitsche, Frank O.", "platforms": "OTHER \u003e MODELS \u003e COMPUTERS", "repositories": null, "science_programs": null, "south": -90.0, "title": "Supporting Antarctic Research with Ongoing Operations and Development of the USAP-DC Project Catalog and Data Repository", "uid": "p0010274", "west": -180.0}, {"awards": "1745043 Simkins, Lauren; 1745055 Stearns, Leigh", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Circum-Antarctic grounding-line sinuosity; Elevation transects from Pine Island Bay; Pennell Trough, Ross Sea bathymetry and glacial landforms", "datasets": [{"dataset_uid": "601484", "doi": "10.15784/601484", "keywords": "Antarctica; Bed Roughness; Bed Slope; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Pinning Points", "people": "Riverman, Kiya; Stearns, Leigh; Simkins, Lauren", "repository": "USAP-DC", "science_program": null, "title": "Circum-Antarctic grounding-line sinuosity", "url": "https://www.usap-dc.org/view/dataset/601484"}, {"dataset_uid": "601474", "doi": "10.15784/601474", "keywords": "Antarctica; Bathymetry; Elevation; Geomorphology; Glacial History; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marine Geoscience; NBP1502; Pennell Trough; Ross Sea; R/v Nathaniel B. Palmer", "people": "Simkins, Lauren; Prothro, Lindsay; Anderson, John; Greenwood, Sarah; Eareckson, Elizabeth; Munevar Garcia, Santiago", "repository": "USAP-DC", "science_program": null, "title": "Pennell Trough, Ross Sea bathymetry and glacial landforms", "url": "https://www.usap-dc.org/view/dataset/601474"}, {"dataset_uid": "601774", "doi": "10.15784/601774", "keywords": "Antarctica; Bed Roughness; Cryosphere; Geomorphology; Pine Island Bay", "people": "Munevar Garcia, Santiago", "repository": "USAP-DC", "science_program": null, "title": "Elevation transects from Pine Island Bay", "url": "https://www.usap-dc.org/view/dataset/601774"}], "date_created": "Tue, 28 Sep 2021 00:00:00 GMT", "description": "Current ice mass loss in Antarctica is largely driven by changes at glacier grounding lines, where inland ice transitions from being grounded to floating in the ocean. The rate and pattern of glacier retreat in these circumstances is thought to be controlled by the terrain under the ice. This project incorporates evidence of past ice-retreat events and other field data, such as grounding-line positions and dates, subglacial topography, and meltwater features, into numerical models of ice flow to investigate the influence that grounding-line processes and subglacial topography have on glacier retreat rates over the past 15,000 years. Recent observations suggest that Antarctic ice mass loss is largely driven by perturbations at or near the grounding line. However, the lack of information on subglacial and grounding-line environments causes large uncertainties in projections of mass loss and sea-level rise. This project will integrate geologic data from the deglaciated continental shelf into numerical models of varying complexity from one to three-dimensions. Rarely do numerical ice-sheet models of Antarctica have multiple constraints on dynamics over the past ~15,000 years (a period that spans the deglaciation of the Antarctic continental shelf since the Last Glacial Maximum). The geologic constraints include grounding-line positions, deglacial chronologies, and information on grounding line-ice shelf processes. The models will be used to investigate necessary perturbations and controls that meet the geological constraints. The multidisciplinary approach of merging geologic reconstructions of paleo-ice behavior with numerical models of ice response will allow the research team to test understanding of subglacial controls on grounding-line dynamics and assess the stability of modern grounding lines. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "MARINE SEDIMENTS; USAP-DC; Amd/Us; GLACIERS; BATHYMETRY; GLACIAL LANDFORMS; Antarctica; AMD; USA/NSF; R/V NBP", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "paleo_time": null, "persons": "Simkins, Lauren; Stearns, Leigh; Anderson, John; van der Veen, Cornelis", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations", "uid": "p0010269", "west": -180.0}, {"awards": "1656126 Koppers, Anthony", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "OSU Marine and Geology Repository", "datasets": [{"dataset_uid": "200245", "doi": null, "keywords": null, "people": null, "repository": "OSU-MGR", "science_program": null, "title": "OSU Marine and Geology Repository", "url": "https://osu-mgr.org/"}], "date_created": "Fri, 10 Sep 2021 00:00:00 GMT", "description": "Nontechnical Description The Antarctic core collection, curated at Florida State University since 1963, is one of the world?s premier marine geology collections. Consisting of irreplaceable sediment cores, this archive has greatly advanced the understanding of the Earth system, past and present, and will remain critical to future studies of the Earth. Given Oregon State University?s (OSU) leadership in marine research and long track record providing state-of-the-art curatorial services through the OSU Marine and Geology Repository, this facility will provide world-class curatorial stewardship of the Antarctic core collection for decades to come. The Antarctic core collection will be co-located and co-managed with the current OSU collection in a single modern repository and analytical facility. The combined collection will contain more than 30 km of refrigerated sediment core from the world?s oceans and will be housed in a new 33,000 SFT facility purchased in 2009 by OSU and upgraded in 2016-17. The total refrigerated space can hold both collections comfortably and has at least five decades of expansion space. The co-location and co-management of these two collections, paired with a modern suite of analytical facilities, will lead to greater collaboration, cross-pollination of ideas, and availability of enhanced technical services and capabilities for a growing user group that increasingly relies on marine sediments. The facility will employ a comprehensive community interaction plan that takes advantage of the new OSU Marine and Geology Repository building with a 32-person seminar room, its large 1,044 square foot core lab, and ten adjoining analytical laboratories, which will provide scientific and experiential learning opportunities for students, the general public, and the Earth Sciences research community. The facility will organize small group meetings, sampling parties and summer schools that will complement ongoing support for teaching, training and learning through the use of the repository in graduate, undergraduate, and K-12 classes and Research Experience for Undergraduate programs. The repository is open to the general public for tours and presentations, and the data products derived from the facility will be disseminated via the repository website at http://osu-mgr.org/ and other national databases. Technical Description The Antarctic and the Southern Ocean National Collection of Rock and Sediment Cores currently housed at Florida State University will be relocated to Oregon State University (OSU) and housed along with the OSU Marine and Geology Repository. Oregon State University investigators will co-manage the Antarctic core collection and the Marine and Geology Repository as a single modern repository and analytical facility. The combined collection will be housed a new 33,000 square foot building with refrigerated space that can hold both collections with approximately five decades of expansion space. The co-location and co-management of these two collections offers unique curatorial synergies, cost savings, and improved capabilities to support both the research and educational needs of a wider marine and Antarctic communities. The facility will house a 32-person seminar room, a large 1,044 square foot core lab that allows layout, inspection and examination of cores, and adjoining analytical laboratories that will provide quantitative analysis as well as experiential learning opportunities for students.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e CORERS \u003e SEDIMENT CORERS", "is_usap_dc": true, "keywords": "Dredge Samples; MARINE SEDIMENTS; Amd/Us; AMD; SHIPS; USAP-DC; Antarctica; USA/NSF; Sediment Core", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Instrumentation and Support", "paleo_time": null, "persons": "Koppers, Anthony; Stoner, Joseph", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e SHIPS", "repo": "OSU-MGR", "repositories": "OSU-MGR", "science_programs": null, "south": -90.0, "title": "Curatorial Stewardship of the Antarctic and the Southern Ocean National Collection of Rock and Sediment Cores at the OSU Marine and Geology Repository", "uid": "p0010262", "west": -180.0}, {"awards": "0739480 Grunow, Anne; 1141906 Grunow, Anne; 9910267 Grunow, Anne; 0440695 Grunow, Anne; 2137467 Grunow, Anne; 2436582 Grunow, Anne; 1643713 Grunow, Anne", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Marine Geoscience Data System - cruise links; Polar Rock Repository; SESAR sample registration", "datasets": [{"dataset_uid": "200359", "doi": "", "keywords": null, "people": null, "repository": "PRR", "science_program": null, "title": "Polar Rock Repository", "url": "http://research.bpcrc.osu.edu/rr/"}, {"dataset_uid": "200241", "doi": "", "keywords": null, "people": null, "repository": "SESAR", "science_program": null, "title": "SESAR sample registration", "url": "https://www.geosamples.org/about/services#igsnregistration"}, {"dataset_uid": "200242", "doi": "", "keywords": null, "people": null, "repository": "MGDS", "science_program": null, "title": "Marine Geoscience Data System - cruise links", "url": "https://www.marine-geo.org/"}, {"dataset_uid": "200243", "doi": "", "keywords": null, "people": null, "repository": "PRR", "science_program": null, "title": "Polar Rock Repository", "url": "https://prr.osu.edu/"}], "date_created": "Thu, 09 Sep 2021 00:00:00 GMT", "description": "Non-Technical Abstract: The Polar Rock Repository (PRR) at The Ohio State University provides a unique resource for researchers studying the polar regions by offering free access to geological samples and data. This project seeks support to continue expanding and managing the collection, which is vital for scientific studies and planning fieldwork in Antarctica. Over the next five years, the repository plans to add tens of thousands of new samples and images, making it easier for researchers to study polar geology without the high cost and environmental impact of traveling to remote Antarctic locations. The PRR also supports education and outreach by providing hands-on resources for schools, colleges, and the public, including a \"Polar Rock Box\" program that brings real Antarctic samples into classrooms. This work ensures the preservation of important scientific materials and makes them accessible to a broad community, advancing understanding of our planet\u2019s polar regions. Technical Abstract: The Polar Rock Repository (PRR) at The Ohio State University serves as a critical resource for polar earth science research, offering no-cost loans of geological samples and comprehensive metadata to the scientific community. This proposal seeks funding to support the continued curation, expansion, and management of the PRR, alongside its educational and outreach initiatives. Over the next five years, the PRR anticipates acquiring approximately 15,000 new samples, including those from major drilling operations (RAID, Winkie drill cores) and polar cruises. The repository also aims to significantly grow its archives of images, petrographic thin sections, and mineral separates. By preserving these physical and digital assets in a discoverable online database, the PRR fosters transparency, reproducibility, and accessibility in polar research, fulfilling Antarctic data management mandates. The intellectual merit lies in enabling cutting-edge scientific analyses through freely available samples and metadata. Broader impacts include reduced environmental costs of Antarctic research, enhanced educational opportunities, and outreach to a diverse audience through initiatives like the \"Polar Rock Box\" program. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "USAP-DC; FIELD SURVEYS; Pacific Ocean; ROCKS/MINERALS/CRYSTALS; GLACIATION; AMD; Weddell Sea; Scotia Sea; TECTONICS; Antarctica; Southern Ocean; Amd/Us; USA/NSF; Amundsen Sea", "locations": "Pacific Ocean; Amundsen Sea; Scotia Sea; Weddell Sea; Antarctica; Southern Ocean", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "paleo_time": null, "persons": "Grunow, Anne", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS", "repo": "PRR", "repositories": "MGDS; PRR; SESAR", "science_programs": null, "south": -90.0, "title": "Continuing Operations Proposal: \r\nThe Polar Rock Repository as a Resource for Earth Systems Science\r\n", "uid": "p0010259", "west": -180.0}, {"awards": "2103032 Schmittner, Andreas", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": null, "datasets": null, "date_created": "Thu, 09 Sep 2021 00:00:00 GMT", "description": "This project investigates Antarctic ice-ocean interactions of the last 20,000 years. The Antarctic ice sheet is an important component of Earth\u2019s climate system, as it interacts with the atmosphere, the surrounding Southern Ocean, and the underlaying solid Earth. The ice sheet is also the largest potential contributor to future sea-level rise and a major uncertainty in climate projections. Climate change may trigger instabilities that may lead to fast and irreversible collapse of parts of the ice sheet. However, little is known about how interactions between the Antarctic ice sheet and the rest of the climate system affect its behavior, climate, and sea level, partly because most climate models currently do not have fully-interactive ice-sheet components. The project team will construct a numerical climate model that includes an interactive Antarctic ice sheet, improving computational infrastructure for research. The model code will be made freely available to the public on a code-sharing site. In addition, the team will synthesize paleoclimate data and compare these with model simulations. This model-data comparison will test three scientific hypotheses regarding past changes in deep-ocean circulation, ice sheet, carbon, and sea level. The project will contribute to a better understanding of ice-ocean interactions and past climate variability. The project will test ideas that ice-ocean interactions have been important for setting deep ocean circulation and carbon storage during the Last Glacial Maximum and subsequent deglaciation. The new model will consist of three existing and well-tested components: (1) an isotope-enabled climate-carbon cycle model of intermediate complexity; (2) a model of the combined Antarctic ice sheet, solid Earth, and sea level; and (3) an iceberg model. The coupling will include ocean-temperature effects on basal melting of ice shelves; freshwater fluxes from the ice sheet to the ocean; and calving, transport and melting of icebergs. Once constructed and optimized, the model will be applied to simulate the Last Glacial Maximum and subsequent deglaciation. Differences between model versions with full, partial, or no coupling will be used to investigate the effects of ice-ocean interactions on the Meridional Overturning Circulation, deep ocean carbon storage, and ice-sheet fluctuations. Paleoclimate data synthesis will include temperature, carbon and nitrogen isotopes, radiocarbon ages, protactinium-thorium ratios, neodymium isotopes, carbonate ion, dissolved oxygen, relative sea level, and terrestrial cosmogenic ages into one multi-proxy database with a consistent updated chronology. The project will support an early-career scientist, one graduate student, undergraduate students, and new and ongoing national and international collaborations. Outreach activities in collaboration with a local science museum will benefit rural communities in Oregon by improving their climate literacy. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "ICE CORE RECORDS; Amd/Us; USA/NSF; OCEAN TEMPERATURE; GLACIERS/ICE SHEETS; BIOGEOCHEMICAL CYCLES; MODELS; AMD; United States Of America; OCEAN CURRENTS; ICEBERGS; PALEOCLIMATE RECONSTRUCTIONS", "locations": "United States Of America", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "paleo_time": null, "persons": "Schmittner, Andreas; Haight, Andrew ; Clark, Peter", "platforms": "OTHER \u003e MODELS \u003e MODELS", "repositories": null, "science_programs": null, "south": -90.0, "title": "Investigating Antarctic Ice Sheet-Ocean-Carbon Cycle Interactions During the Last Deglaciation", "uid": "p0010256", "west": -180.0}, {"awards": "1644155 Twining, Benjamin", "bounds_geometry": "POLYGON((78 -68.4,78.05 -68.4,78.1 -68.4,78.15 -68.4,78.2 -68.4,78.25 -68.4,78.3 -68.4,78.35 -68.4,78.4 -68.4,78.45 -68.4,78.5 -68.4,78.5 -68.419,78.5 -68.438,78.5 -68.457,78.5 -68.476,78.5 -68.495,78.5 -68.514,78.5 -68.533,78.5 -68.552,78.5 -68.571,78.5 -68.59,78.45 -68.59,78.4 -68.59,78.35 -68.59,78.3 -68.59,78.25 -68.59,78.2 -68.59,78.15 -68.59,78.1 -68.59,78.05 -68.59,78 -68.59,78 -68.571,78 -68.552,78 -68.533,78 -68.514,78 -68.495,78 -68.476,78 -68.457,78 -68.438,78 -68.419,78 -68.4))", "dataset_titles": "Flow cytometry enumeration of virus-like and bacteria-like abundance in Ace, Deep, \u0026 Organic lakes (Antarctica)", "datasets": [{"dataset_uid": "601626", "doi": "10.15784/601626", "keywords": "Ace Lake; Antarctica; Deep Lake; Organic Lake; Vestfold Hills", "people": "Twining, Benjamin; Martinez-Martinez, Joaquin", "repository": "USAP-DC", "science_program": null, "title": "Flow cytometry enumeration of virus-like and bacteria-like abundance in Ace, Deep, \u0026 Organic lakes (Antarctica)", "url": "https://www.usap-dc.org/view/dataset/601626"}], "date_created": "Fri, 06 Aug 2021 00:00:00 GMT", "description": "Viruses are prevalent in aquatic environments where they reach up to five hundred million virus particles in a teaspoon of water. Ongoing discovery of viruses seems to confirm current understanding that all forms of life can host and be infected by viruses and that viruses are one of the largest reservoirs of unexplored genetic diversity on Earth. This study aims to better understand interactions between specific viruses and phytoplankton hosts and determine how these viruses may affect different algal groups present within lakes of the Vestfold Hills, Antarctica. These lakes (Ace, Organic and Deep)were originally derived from the ocean and contain a broad range of saline conditions with a similarly broad range of physicochemical characteristics resulting from isolation and low external influence for thousands of years. These natural laboratories allow examination of microbial processes and interactions that would be difficult to characterize elsewhere on earth. The project will generate extensive genomic information that will be made freely available. The project will also leverage the study of viruses and the genomic approaches employed to advance the training of undergraduate students and to engage and foster an understanding of Antarctic science and studies of microbes during a structured informal education program in Maine for the benefit of high school students. By establishing the dynamics and interactions of (primarily) specific dsDNA virus groups in different habitats with different redox conditions throughout seasonal and inter annual cycles the project will learn about the biotic and abiotic factors that influence microbial community dynamics. This project does not require fieldwork in Antarctica. Instead, the investigators will leverage already collected and archived samples from three lakes that have concurrent measures of physicochemical information. Approximately 2 terabyte of Next Generation Sequencing (NGS) (including metagenomes, SSU rRNA amplicons and single virus genomes) will be generated from selected available samples through a Community Science Program (CSP) funded by the Joint Genome Institute. The investigators will employ bioinformatics to interrogate those sequence databases. In particular, they will focus on investigating the presence, phylogeny and co-occurrence of polintons, polinton-like viruses, virophages and large dsDNA phytoplankton viruses as well as of their putative eukaryotic microbial hosts. Bioinformatic analyses will be complemented with quantitative digital PCR and microbial association network analysis to detect specific virus?virus?host interactions from co-occurrence spatial and temporal patterns. Multivariate analysis and network analyses will also be performed to investigate which abiotic factors most closely correlate with phytoplankton and virus abundances, temporal dynamics, and observed virus-phytoplankton associations within the three lakes. The results of this project will improve understanding of phytoplankton and their viruses as vital components of the carbon cycle in Antarctic, marine-derived aquatic environments, and likely in any other aquatic environment. Overall, this work will advance understanding of the genetic underpinnings of adaptations in unique Antarctic environments.", "east": 78.5, "geometry": "POINT(78.25 -68.495)", "instruments": null, "is_usap_dc": true, "keywords": "LABORATORY; AMD; USAP-DC; VIRUSES; Vestfold Hills; Amd/Us; FIELD SURVEYS; USA/NSF", "locations": "Vestfold Hills", "north": -68.4, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Twining, Benjamin; Martinez-Martinez, Joaquin", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS; OTHER \u003e PHYSICAL MODELS \u003e LABORATORY", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.59, "title": "Viral control of microbial communities in Antarctic lakes", "uid": "p0010237", "west": 78.0}, {"awards": "1746087 Tarrant, Ann", "bounds_geometry": "POLYGON((-80 -60,-77.5 -60,-75 -60,-72.5 -60,-70 -60,-67.5 -60,-65 -60,-62.5 -60,-60 -60,-57.5 -60,-55 -60,-55 -61,-55 -62,-55 -63,-55 -64,-55 -65,-55 -66,-55 -67,-55 -68,-55 -69,-55 -70,-57.5 -70,-60 -70,-62.5 -70,-65 -70,-67.5 -70,-70 -70,-72.5 -70,-75 -70,-77.5 -70,-80 -70,-80 -69,-80 -68,-80 -67,-80 -66,-80 -65,-80 -64,-80 -63,-80 -62,-80 -61,-80 -60))", "dataset_titles": "Calanoides acutus: Transcriptome and gene expression data; BioProject PRJNA757455; Calanus propinquus: Transcriptome and gene expression data; BioProject PRJNA669816; Expedition data of LMG1901; Rhincalanus gigas: Transcriptome and gene expression data; BioProject PRJNA666170", "datasets": [{"dataset_uid": "200283", "doi": "", "keywords": null, "people": null, "repository": "NCBI", "science_program": null, "title": "Calanus propinquus: Transcriptome and gene expression data; BioProject PRJNA669816", "url": "https://www.ncbi.nlm.nih.gov/bioproject/PRJNA669816"}, {"dataset_uid": "200125", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of LMG1901", "url": "https://www.rvdata.us/search/cruise/LMG1901"}, {"dataset_uid": "200284", "doi": "", "keywords": null, "people": null, "repository": "NCBI", "science_program": null, "title": "Calanoides acutus: Transcriptome and gene expression data; BioProject PRJNA757455", "url": "https://www.ncbi.nlm.nih.gov/bioproject/?term=PRJNA757455"}, {"dataset_uid": "200239", "doi": "", "keywords": null, "people": null, "repository": "NCBI", "science_program": null, "title": "Rhincalanus gigas: Transcriptome and gene expression data; BioProject PRJNA666170", "url": "https://www.ncbi.nlm.nih.gov/bioproject/PRJNA666170"}], "date_created": "Fri, 06 Aug 2021 00:00:00 GMT", "description": "Animals in the polar oceans have adapted to dramatic seasonal changes in day length, food availability, and ice cover, as well as to consistently cold waters. This project focuses on the adaptations of copepods - small animals that live in the water column and are an important food source to many different predators. The field studies will take place in the western Antarctic Peninsula, an environment and ecosystem that is rapidly changing. Antarctic copepods have developed particular feeding and behavioral strategies to survive in their very seasonal environment, however it is not known how each of these species will respond to environmental change. The overall goal of this project is to examine and compare these adaptations across species and to understand how each species responds to short-term changes in food availability. The project contains three main objectives: the first objective is to compare the sets of genes across species, especially looking at genes related to storage of energy from food. The second objective is to measure and compare the responses of copepods to changes in food availability. The third objective is to determine how variation across the western Antarctic Pensinsula habitat affects the feeding condition of the copepods. To make the data more useful to the broader research community, a database will be developed enabling easy comparison of genetic information between copepod species. This project will provide hands-on training opportunities to graduate and undergraduate student and will seek to recruit students from underrepresented groups. Results and scientific concepts will be shared through outreach activities, including an expedition blog, a series of interactive animations, and public presentations. Polar marine organisms have adapted to dramatic seasonal changes in photoperiod, light intensity, and ice cover, as well as to cold but stable thermal environments. The western Antarctic Peninsula, the focal region for the field studies, has experienced rapid warming and ice melt. While it is difficult to predict exactly how physical conditions in this region will change, effects on species distributions have already been documented. Large Antarctic copepods in the families Calanidae and Rhincalanidae are dominant components of the mesozooplankton that use different metabolic and behavioral strategies to optimize their use of a highly seasonal food supply. The overall goal of this project is to leverage molecular approaches to examine the physiological and metabolic adaptations at the individual and species level. The project focuses on three main objectives: the first objective is to characterize the gene complement and stage-specific gene expression patterns in Antarctic copepods within an evolutionary context. The second objective is to measure and compare the physiological and molecular responses of juvenile copepods to variable feeding conditions. The third objective is to characterize metabolic variation within natural copepod populations. The metabolically diverse Antarctic copepods also provide an excellent opportunity to compare mechanisms regulating energy storage and utilization and to test hypotheses regarding the roles of specific genes. The field studies will aim to utilize information from an ongoing long term research program (the Palmer Long-Term Ecological Research), which complements the ongoing program and provides extensive context for this project. To make the data more useful to the research community, a database will be developed facilitating comparison of transcriptomes between copepod species. This project will provide hands-on training opportunities to graduate and undergraduate students. Efforts will be made to recruit students who are members of underrepresented minorities. Results and scientific concepts will be broadly disseminated through an expedition blog, a series of interactive animations, and public presentations. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": -55.0, "geometry": "POINT(-67.5 -65)", "instruments": null, "is_usap_dc": true, "keywords": "ARTHROPODS; AMD; PELAGIC; USA/NSF; USAP-DC; PLANKTON; West Antarctic Shelf; Amd/Us; SHIPS", "locations": "West Antarctic Shelf", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Tarrant, Ann", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e SHIPS", "repo": "NCBI", "repositories": "NCBI; R2R", "science_programs": null, "south": -70.0, "title": "Physiological Ecology of \"Herbivorous\" Antarctic Copepods", "uid": "p0010239", "west": -80.0}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": "POLYGON((-65.3 -63.3,-65 -63.3,-64.7 -63.3,-64.4 -63.3,-64.1 -63.3,-63.8 -63.3,-63.5 -63.3,-63.2 -63.3,-62.9 -63.3,-62.6 -63.3,-62.3 -63.3,-62.3 -63.47,-62.3 -63.64,-62.3 -63.81,-62.3 -63.98,-62.3 -64.15,-62.3 -64.32,-62.3 -64.49,-62.3 -64.66,-62.3 -64.83,-62.3 -65,-62.6 -65,-62.9 -65,-63.2 -65,-63.5 -65,-63.8 -65,-64.1 -65,-64.4 -65,-64.7 -65,-65 -65,-65.3 -65,-65.3 -64.83,-65.3 -64.66,-65.3 -64.49,-65.3 -64.32,-65.3 -64.15,-65.3 -63.98,-65.3 -63.81,-65.3 -63.64,-65.3 -63.47,-65.3 -63.3))", "dataset_titles": "18 SSU rDNA type sequences for Notoxcellia coronata (nov. sp.); 18 SSU rDNA type sequences for Notoxcellia picta (nov. sp.); Expedition Data of LMG1805; Fish pictures and skin pathology of X-cell infection in Trematomus scotti.; Gonad and skin histology of Trematomus loennbergii infected by Notoxcellia sp.; Histopathology of X-cell xenomas in Trematomus scotti and Nototheniops larseni.; In situ hybridization of X-cell and host fish 18S SSU rRNA in alternate sections of tumor xenomas.; Metagenomic analysis of apparently healthy and tumor samples using Kaiju software ; microMRI analyses of Trematomus scotti Tsco_18_08 with X-cell xenomas; Morphological and pathological data of Trematomus scotti specimens captured on May 30th, 2018 in Andvord Bay.; Morphological, fecundity, and age data of Trematomus scotti from Andvord Bay and the Weddell Sea.; Nomenclatural Act for the genus Notoxcellia; Nomenclatural Act for the species Notoxcellia coronata; Nomenclatural Act for the species Notoxcellia picta; Phylogenetic Analysis of Notoxcellia species.; Phylogenetic Analysis of Notoxcellia species, including novel Ross Sea specimen; Raw Illumina sequencing reads from skin tumors and visually healthy skins from Trematomus scotti and Nototheniops larseni; Similarity matrices of Notoxcellia spp.; Temperature profiles at five fishing locations on the West Antarctic Peninsula during austral fall 2018.; Trematomus scotti mt-co1 sequence alignment.; Trematomus scotti with X-cell xenomas", "datasets": [{"dataset_uid": "601917", "doi": "10.15784/601917", "keywords": "Alveolata; Antarctic; Cryosphere; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "people": "Devine, Jennifer; Desvignes, Thomas; Postlethwait, John; P\u00e9ron, Clara", "repository": "USAP-DC", "science_program": null, "title": "Similarity matrices of Notoxcellia spp.", "url": "https://www.usap-dc.org/view/dataset/601917"}, {"dataset_uid": "200254", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data of LMG1805", "url": "https://www.rvdata.us/search/cruise/LMG1805"}, {"dataset_uid": "200443", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data of LMG1805", "url": "https://doi.org/10.7284/907930"}, {"dataset_uid": "601892", "doi": "10.15784/601892", "keywords": "Antarctica; Biota; CO1; COX1; Cryonotothenioid; Cryosphere; Genetic Sequences; LMG1805; MT-CO1; Nototheniidae; Notothenioid; Population Genetics", "people": "Schiavon, Luca ; Postlethwait, John; Desvignes, Thomas; Papetti, Chiara", "repository": "USAP-DC", "science_program": null, "title": "Trematomus scotti mt-co1 sequence alignment.", "url": "https://www.usap-dc.org/view/dataset/601892"}, {"dataset_uid": "601893", "doi": "10.15784/601893", "keywords": "Age; Antarctica; Biota; Cryonotothenioid; Cryosphere; Fecundity; Growth; Length; Nototheniidae; Oceans; Otolith; Reproduction; Weight", "people": "Lucassen, Magnus; Streeter, Margaret; Le Francois, Nathalie; Grondin, Jacob; Valdivieso, Alejandro; Sguotti, Camilla; Postlethwait, John; La Mesa, Mario; Detrich, H. William; Mark, Felix C; Riginella, Emilio; Papetti, Chiara; Desvignes, Thomas; Cal\u00ec, Federico", "repository": "USAP-DC", "science_program": null, "title": "Morphological, fecundity, and age data of Trematomus scotti from Andvord Bay and the Weddell Sea.", "url": "https://www.usap-dc.org/view/dataset/601893"}, {"dataset_uid": "200383", "doi": "", "keywords": null, "people": null, "repository": "ZooBank", "science_program": null, "title": "Nomenclatural Act for the species Notoxcellia coronata", "url": "https://zoobank.org/NomenclaturalActs/194d91b2-e268-4238-89e2-385819f2c35b"}, {"dataset_uid": "601539", "doi": "10.15784/601539", "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "people": "Postlethwait, John; Desvignes, Thomas", "repository": "USAP-DC", "science_program": null, "title": "In situ hybridization of X-cell and host fish 18S SSU rRNA in alternate sections of tumor xenomas.", "url": "https://www.usap-dc.org/view/dataset/601539"}, {"dataset_uid": "601538", "doi": "10.15784/601538", "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "people": "Desvignes, Thomas; Postlethwait, John; Lauridsen, Henrik", "repository": "USAP-DC", "science_program": null, "title": "microMRI analyses of Trematomus scotti Tsco_18_08 with X-cell xenomas", "url": "https://www.usap-dc.org/view/dataset/601538"}, {"dataset_uid": "601537", "doi": "10.15784/601537", "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "people": "Desvignes, Thomas; Postlethwait, John; Varsani, Arvind; Kraberger, Simona ; Fontenele, Rafaela S. ", "repository": "USAP-DC", "science_program": null, "title": "Metagenomic analysis of apparently healthy and tumor samples using Kaiju software ", "url": "https://www.usap-dc.org/view/dataset/601537"}, {"dataset_uid": "601536", "doi": "10.15784/601536", "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "people": "Desvignes, Thomas; Postlethwait, John; Murray, Katrina N. ; Kent, Michael L. ", "repository": "USAP-DC", "science_program": null, "title": "Histopathology of X-cell xenomas in Trematomus scotti and Nototheniops larseni.", "url": "https://www.usap-dc.org/view/dataset/601536"}, {"dataset_uid": "601915", "doi": "10.15784/601915", "keywords": "Alveolata; Antarctic; Cryosphere; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "people": "Postlethwait, John; Desvignes, Thomas; P\u00e9ron, Clara; Devine, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Phylogenetic Analysis of Notoxcellia species, including novel Ross Sea specimen", "url": "https://www.usap-dc.org/view/dataset/601915"}, {"dataset_uid": "601916", "doi": "10.15784/601916", "keywords": "Alveolata; Antarctica; Cryosphere; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Ross Sea; Xcellidae", "people": "Postlethwait, John; Desvignes, Thomas; P\u00e9ron, Clara; Devine, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Gonad and skin histology of Trematomus loennbergii infected by Notoxcellia sp.", "url": "https://www.usap-dc.org/view/dataset/601916"}, {"dataset_uid": "601501", "doi": "10.15784/601501", "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Biota; Notoxcellia Coronata; Notoxcellia Picta; Oceans; Perkinsozoa; Xcellidae", "people": "Postlethwait, John; Desvignes, Thomas; Varsani, Arvind", "repository": "USAP-DC", "science_program": null, "title": "Phylogenetic Analysis of Notoxcellia species.", "url": "https://www.usap-dc.org/view/dataset/601501"}, {"dataset_uid": "601496", "doi": "10.15784/601496", "keywords": "Andvord Bay; Antarctica; Fish", "people": "Desvignes, Thomas; Postlethwait, John; Lauridsen, Henrik", "repository": "USAP-DC", "science_program": null, "title": "Fish pictures and skin pathology of X-cell infection in Trematomus scotti.", "url": "https://www.usap-dc.org/view/dataset/601496"}, {"dataset_uid": "601495", "doi": "10.15784/601495", "keywords": "Antarctica; Antarctic Peninsula", "people": "Desvignes, Thomas", "repository": "USAP-DC", "science_program": null, "title": "Temperature profiles at five fishing locations on the West Antarctic Peninsula during austral fall 2018.", "url": "https://www.usap-dc.org/view/dataset/601495"}, {"dataset_uid": "601494", "doi": "10.15784/601494", "keywords": "Andvord Bay; Antarctica; Fish", "people": "Postlethwait, John; Le Francois, Nathalie; Desvignes, Thomas; Lauridsen, Henrik", "repository": "USAP-DC", "science_program": null, "title": "Morphological and pathological data of Trematomus scotti specimens captured on May 30th, 2018 in Andvord Bay.", "url": "https://www.usap-dc.org/view/dataset/601494"}, {"dataset_uid": "200262", "doi": "", "keywords": null, "people": null, "repository": "MorphoSource", "science_program": null, "title": "Trematomus scotti with X-cell xenomas", "url": "https://www.morphosource.org/projects/000405843?locale=en"}, {"dataset_uid": "200275", "doi": "", "keywords": null, "people": null, "repository": "GenBank", "science_program": null, "title": "18 SSU rDNA type sequences for Notoxcellia coronata (nov. sp.)", "url": "https://www.ncbi.nlm.nih.gov/nuccore/OL630144"}, {"dataset_uid": "200276", "doi": "", "keywords": null, "people": null, "repository": "GenBank", "science_program": null, "title": "18 SSU rDNA type sequences for Notoxcellia picta (nov. sp.)", "url": "https://www.ncbi.nlm.nih.gov/nuccore/OL630145"}, {"dataset_uid": "200277", "doi": "", "keywords": null, "people": null, "repository": "NCBI SRA", "science_program": null, "title": "Raw Illumina sequencing reads from skin tumors and visually healthy skins from Trematomus scotti and Nototheniops larseni", "url": "https://www.ncbi.nlm.nih.gov/bioproject/?term=PRJNA789574"}, {"dataset_uid": "200382", "doi": "", "keywords": null, "people": null, "repository": "ZooBank", "science_program": null, "title": "Nomenclatural Act for the genus Notoxcellia", "url": "https://zoobank.org/NomenclaturalActs/5cf9609e-0111-4386-8518-bd50b5bdde0e"}, {"dataset_uid": "200384", "doi": "", "keywords": null, "people": null, "repository": "ZooBank", "science_program": null, "title": "Nomenclatural Act for the species Notoxcellia picta", "url": "https://zoobank.org/NomenclaturalActs/31062dd2-7202-47fa-86e0-7be5c55ac0e2"}], "date_created": "Thu, 01 Jul 2021 00:00:00 GMT", "description": "Antarctica\u2019s native animals face increasing stressors from warming oceans. A key unanswered question is how Antarctic life will respond. If warmer waters contribute to fish disease susceptibility, then iconic Antarctic predators they support, including penguins, seals, and killer whales, will suffer. A recent scientific cruise on the Antarctic peninsula encountered a population of crowned notothen fish that were plagued by pink, wart-like tumors that covered 10% to 30% of the body surface on about a third of the animals. Similar tumors had not previously been reported, suggesting that this might be a new disease that threatens Antarctic fish. The goal of proposed work is to identify the biological origins of the tumor and how it affects cell function and organismal physiology. The work is potentially transformative because it studies what might be a harbinger of Antarctic fish responses to global climate change. The project has several Broader Impacts. First, it will publicize the tumors. Because Antarctic researchers have never reported a tumor epidemic, the community must become aware of the outbreak and the tumor\u2019s distinct diagnostic features. Second, dissemination of project results will stir further research to determine if this is an isolated event or is becoming a general phenomenon, and thus a broad concern for Antarctic ecosystems. Third, assays the project develops to detect the disease will enhance research infrastructure. Finally, work will broaden the nation\u2019s scientific workforce by providing authentic research experiences for high school students and undergraduates from groups underrepresented in scientific research. The overall goal of proposed work is to identify the biological origins of the neoplasia and how it affects cell function and physiology. Aim 1 is to identify the pathogenic agent. Aim 1a is to test the hypothesis that a virus causes the neoplasia by isolating and sequencing viral nucleic acids from neoplasias and from animals that are not visibly affected. Aim 1b is to test neoplasias for bacteria, fungi, protozoa, or invertebrate parasites not present in healthy skin. Aim 2 is to learn how the disease alters the biology of affected cells. Aim 2a is to examine histological sections of affected and control tissues to see if the neoplasias are similar to previously reported skin diseases in temperate water fishes. Aim 2b is to examine the function of neoplastic cells by RNA-seq transcriptomics to identify genes that are differentially expressed in neoplasias and normal skin. Achieving these Aims will advance knowledge by identifying the causes and consequences of an outbreak of neoplasias in Antarctic fish. Proposed work is significant because it is the first to investigate a neoplasia cluster in Antarctic fish. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": -62.3, "geometry": "POINT(-63.8 -64.15)", "instruments": null, "is_usap_dc": true, "keywords": "FIELD SURVEYS; Andvord Bay; Amd/Us; PROTISTS; BENTHIC; FISH; Dallmann Bay; USAP-DC; NSF/USA; AMD", "locations": "Andvord Bay; Dallmann Bay", "north": -63.3, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Postlethwait, John; Varsani, Arvind; Desvignes, Thomas", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS", "repo": "USAP-DC", "repositories": "GenBank; MorphoSource; NCBI SRA; R2R; USAP-DC; ZooBank", "science_programs": null, "south": -65.0, "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "uid": "p0010221", "west": -65.3}, {"awards": "1640481 Rotella, Jay", "bounds_geometry": "POLYGON((162 -75,162.8 -75,163.6 -75,164.4 -75,165.2 -75,166 -75,166.8 -75,167.6 -75,168.4 -75,169.2 -75,170 -75,170 -75.38,170 -75.76,170 -76.14,170 -76.52,170 -76.9,170 -77.28,170 -77.66,170 -78.03999999999999,170 -78.42,170 -78.8,169.2 -78.8,168.4 -78.8,167.6 -78.8,166.8 -78.8,166 -78.8,165.2 -78.8,164.4 -78.8,163.6 -78.8,162.8 -78.8,162 -78.8,162 -78.42,162 -78.03999999999999,162 -77.66,162 -77.28,162 -76.9,162 -76.52,162 -76.14,162 -75.76,162 -75.38,162 -75))", "dataset_titles": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2017 Antarctic field season; Demographic data for Weddell Seal colonies in Erebus Bay through the 2023 Antarctic field season", "datasets": [{"dataset_uid": "601837", "doi": "10.15784/601837", "keywords": "AMD; Amd/Us; Antarctica; Cryosphere; McMurdo Sound; Population Dynamics; USA/NSF; USAP-DC; Weddell Seal", "people": "Rotella, Jay", "repository": "USAP-DC", "science_program": null, "title": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2023 Antarctic field season", "url": "https://www.usap-dc.org/view/dataset/601837"}, {"dataset_uid": "200300", "doi": " https://doi.org/10.15784/601125 ", "keywords": null, "people": null, "repository": "USAP-DC", "science_program": null, "title": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2017 Antarctic field season", "url": "https://www.usap-dc.org/view/dataset/601125"}], "date_created": "Thu, 24 Jun 2021 00:00:00 GMT", "description": "The consequences of variation in maternal effects on the ability of offspring to survive, reproduce, and contribute to future generations has rarely been evaluated in polar marine mammals. This is due to the challenges of having adequate data on the survival and reproductive outcomes for numerous offspring born in diverse environmental conditions to mothers with known and diverse sets of traits. This research project will evaluate the survival and reproductive consequences of early-life environmental conditions and variation in offspring traits that are related to maternal attributes (e.g. birth date, birth mass, weaning mass, and swimming behavior) in a population of individually marked Weddell seals in the Ross Sea. Results will allow an evaluation of the importance of different types of individuals to the Weddell Seal\u0027s population sustenance and better assessments of factors contributing to the population dynamics in the past and into the future. The project allows for documentation of specific individual seal\u0027s unique histories and provisioning of such information to the broader science community that seeks to study these seals, educating graduate and undergraduate ecology students, producing science-outreach videos, and developing a multi-media iBook regarding the project\u0027s science activities, goals and outcomes. The research has the broad objective of evaluating the importance of diverse sources of variation in pup characteristics to survival and reproduction. The study will (1) record birth dates, body mass metrics, and time spent in the water for multiple cohorts of pups (born to known-age mothers) in years with different environmental conditions; (2) mark all pups born in the greater Erebus Bay study area and conduct repeated surveys to monitor fates of these pups through the age of first reproduction; and (3) use analyses specifically designed for data on animals that are individually marked and resighted each year to evaluate hypotheses about how variation in birth dates, pup mass, time spent in the water by pups, and environmental conditions relate to variation in early-life survival and recruitment for those pups. The research will also allow the documentation of the population status that will contribute to the unique long-term database for the local population that dates back to 1978.", "east": 170.0, "geometry": "POINT(166 -76.9)", "instruments": null, "is_usap_dc": true, "keywords": "AMD; ANIMAL ECOLOGY AND BEHAVIOR; Amd/Us; FIELD INVESTIGATION; Ross Sea; USA/NSF; USAP-DC", "locations": "Ross Sea", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Rotella, Jay; Garrott, Robert", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.8, "title": "The consequences of maternal effects and environmental conditions on offspring success in an Antarctic predator", "uid": "p0010198", "west": 162.0}, {"awards": "1443556 Thomson, Stuart; 1443342 Licht, Kathy", "bounds_geometry": null, "dataset_titles": "Apatite (U-Th)/He and TREE Data Central Transantarctic Mountains", "datasets": [{"dataset_uid": "601462", "doi": "10.15784/601462", "keywords": "Antarctica; Beardmore Glacier; Erosion; Landscape Evolution; Shackleton Glacier; Transantarctic Mountains; (U-Th)/He", "people": "He, John; Hemming, Sidney R.; Licht, Kathy; Reiners, Peter; Thomson, Stuart", "repository": "USAP-DC", "science_program": null, "title": "Apatite (U-Th)/He and TREE Data Central Transantarctic Mountains", "url": "https://www.usap-dc.org/view/dataset/601462"}], "date_created": "Wed, 09 Jun 2021 00:00:00 GMT", "description": "Antarctica is almost entirely covered by ice, in places over two miles thick. This ice hides a landscape that is less well known than the surface of Mars and represents one of Earth\u0027s last unexplored frontiers. Ice-penetrating radar images provide a remote glimpse of this landscape including ice-buried mountains larger than the European Alps and huge fjords twice as deep as the Grand Canyon. The goal of this project is to collect sediment samples derived from these landscapes to determine when and under what conditions these features formed. Specifically, the project seeks to understand the landscape in the context of the history and dynamics of the overlying ice sheet and past mountain-building episodes. This project accomplishes this goal by analyzing sand collected during previous sea-floor drilling expeditions off the coast of Antarctica. This sand was supplied from the continent interior by ancient rivers when it was ice-free over 34 million year ago, and later by glaciers. The project will also study bedrock samples from rare ice-free parts of the Transantarctic Mountains. The primary activity is to apply multiple advanced dating techniques to single mineral grains contained within this sand and rock. Different methods and minerals yield different dates that provide insight into how Antarctica?s landscape has eroded over the many tens of millions of years during which sand was deposited offshore. The dating techniques that are being developed and enhanced for this study have broad application in many branches of geoscience research and industry. The project makes cost-effective use of pre-existing sample collections housed at NSF facilities including the US Polar Rock Repository, the Gulf Coast Core Repository, and the Antarctic Marine Geology Research Facility. The project will contribute to the STEM training of two graduate and two undergraduate students, and includes collaboration among four US universities as well as international collaboration between the US and France. The project also supports outreach in the form of a two-week open workshop giving ten students the opportunity to visit the University of Arizona to conduct STEM-based analytical work and training on Antarctic-based projects. Results from both the project and workshop will be disseminated through presentations at professional meetings, peer-reviewed publications, and through public outreach and media. The main objective of this project is to reconstruct a chronology of East Antarctic subglacial landscape evolution to understand the tectonic and climatic forcing behind landscape modification, and how it has influenced past ice sheet inception and dynamics. Our approach focuses on acquiring a record of the cooling and erosion history contained in East Antarctic-derived detrital mineral grains and clasts in offshore sediments deposited both before and after the onset of Antarctic glaciation. Samples will be taken from existing drill core and marine sediment core material from offshore Wilkes Land (100\u00b0E-160\u00b0E) and the Ross Sea. Multiple geo- and thermo-chronometers will be employed to reconstruct source region cooling history including U-Pb, fission-track, and (U-Th)/He dating of zircon and apatite, and 40Ar/39Ar dating of hornblende, mica, and feldspar. This offshore record will be augmented and tested by applying the same methods to onshore bedrock samples in the Transantarctic Mountains obtained from the US Polar Rock Repository and through fieldwork. The onshore work will additionally address the debated incision history of the large glacial troughs that cut the range, now occupied by glaciers draining the East Antarctic Ice Sheet. This includes collection of samples from several age-elevation transects, apatite 4He/3He thermochronometry, and Pecube thermo-kinematic modeling. Acquiring an extensive geo- and thermo-chronologic database will also provide valuable new information on the poorly known ice-hidden geology and tectonics of subglacial East Antarctica that has implications for improving supercontinent reconstructions and understanding continental break-up.", "east": null, "geometry": null, "instruments": null, "is_usap_dc": true, "keywords": "LABORATORY; LANDSCAPE; AGE DETERMINATIONS; FIELD INVESTIGATION; GLACIAL PROCESSES; Transantarctic Mountains; USA/NSF; Thermochronology; Amd/Us; USAP-DC; TRACE ELEMENTS; Provenance Analysis; AMD; LANDFORMS; GLACIAL LANDFORMS", "locations": "Transantarctic Mountains", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "paleo_time": null, "persons": "Thomson, Stuart; Reiners, Peter; Licht, Kathy", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION; OTHER \u003e PHYSICAL MODELS \u003e LABORATORY", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Collaborative Research: East Antarctic Glacial Landscape Evolution (EAGLE): A Study using Combined Thermochronology, Geochronology and Provenance Analysis", "uid": "p0010188", "west": null}, {"awards": "1541285 Tauxe, Lisa", "bounds_geometry": "POLYGON((162.144 -77.2233,162.8676 -77.2233,163.5912 -77.2233,164.3148 -77.2233,165.0384 -77.2233,165.762 -77.2233,166.4856 -77.2233,167.2092 -77.2233,167.9328 -77.2233,168.6564 -77.2233,169.38 -77.2233,169.38 -77.34097,169.38 -77.45864,169.38 -77.57631,169.38 -77.69398,169.38 -77.81165,169.38 -77.92932,169.38 -78.04699,169.38 -78.16466,169.38 -78.28233,169.38 -78.4,168.6564 -78.4,167.9328 -78.4,167.2092 -78.4,166.4856 -78.4,165.762 -78.4,165.0384 -78.4,164.3148 -78.4,163.5912 -78.4,162.8676 -78.4,162.144 -78.4,162.144 -78.28233,162.144 -78.16466,162.144 -78.04699,162.144 -77.92932,162.144 -77.81165,162.144 -77.69398,162.144 -77.57631,162.144 -77.45864,162.144 -77.34097,162.144 -77.2233))", "dataset_titles": "Four-Dimensional paleomagnetic dataset: Late Neogene paleodirection and paleointensity results from the Erebus Volcanic Province, Antarctica", "datasets": [{"dataset_uid": "200162", "doi": "", "keywords": null, "people": null, "repository": "Magnetics Infomation Consortiums MagIC", "science_program": null, "title": "Four-Dimensional paleomagnetic dataset: Late Neogene paleodirection and paleointensity results from the Erebus Volcanic Province, Antarctica", "url": "https://www2.earthref.org/MagIC/16912/14b%20cd18-4c33-858e-de5eab74c528"}], "date_created": "Mon, 24 Aug 2020 00:00:00 GMT", "description": "The geomagnetic field is decreasing rapidly, leading some to propose that it will undergo collapse followed by a return to its usual strength but in the opposite direction, a phenomenon known as a \"polarity reversal\" which happened last approximately 800,000 years ago. Such a collapse would have a potentially devastating effect on the ability of the magnetic field to shield us from cosmic ray bombardment, placing our electrical grid at grave risk, among other things. The probability of such a drastic event happening depends on the average strength of the magnetic field. If the average is approximately equal to the present field (as many researchers assume), then the fact that the field is dropping rapidly would be more alarming than if the magnetic field is quite a bit higher than average, as implied by the current data for the ancient magnetic field from Antarctica. The argument over the average field strength stems from the difficulty of its estimation. The new approach advocated for in this proposal will allow researchers to obtain a robust data set for high southerly latitudes which will greatly enhance confidence in estimates of the average ancient field strength, contributing to our ability to assess the likelihood of catastrophic collapse of the geomagnetic field. The difficulty in estimating the average magnetic field strength over the past five million years is apparent when one examines data for ancient field strength as a function of latitude. Directions of the geomagnetic field have been well approximated by an axial dipole (bar magnetic) at the center of the Earth that is aligned with the spin axis. But the signal of such an axial geomagnetic dipole, whereby the field strength doubles from the equator to the poles, is not readily apparent in the database of field strength estimates from the last five million years. There are several possible explanations for this troubling failure: 1) combining data from different ages with possibly different average intensities leads to an inappropriate comparison of field states, 2) there is a depression of field strength at high latitude, perhaps reflecting the role of the `tangent cylinder?, or 3) there is noise and/or bias introduced by poor selection criteria or poor experimental design. The latter is a likely explanation as published data from the 1960 lava flow on Hawaii display the entire range of intensity values observed on the Earth\u0027s surface today, yet samples from this lava flow should all have one distinct value. This proposal benefits from the development of new experimental methods, better field strategies and a new approach to data selection that will allow accurate estimation of the ancient field strength through a comprehensive field campaign to collect lava flow samples from previously studied outcrops targeting the most promising material. These will be analyzed using the most robust experimental protocol and subjected to rigorous selection criteria proven to reject inaccurate results, leading to both accurate and precise estimates of ancient field strength.", "east": 169.38, "geometry": "POINT(165.762 -77.81165)", "instruments": null, "is_usap_dc": true, "keywords": "McMurdo; PALEOMAGNETISM; LABORATORY", "locations": "McMurdo", "north": -77.2233, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Tauxe, Lisa; Staudigel, Hubertus", "platforms": "OTHER \u003e PHYSICAL MODELS \u003e LABORATORY", "repo": "Magnetics Infomation Consortiums MagIC", "repositories": "Magnetics Infomation Consortiums MagIC", "science_programs": null, "south": -78.4, "title": "Finding the Missing Geomagnetic Dipole Signal in Global Pleointensity Data: Revisiting the High Southerly Latitudes", "uid": "p0010122", "west": 162.144}, {"awards": "0125252 Padman, Laurence; 0125602 Padman, Laurence", "bounds_geometry": "POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.1617,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.1386,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))", "dataset_titles": "Antarctic Tide Gauge Database, version 1; AntTG_Database_Tools; CATS2008: Circum-Antarctic Tidal Simulation version 2008; CATS2008_v2023: Circum-Antarctic Tidal Simulation 2008, version 2023; pyTMD; TMD_Matlab_Toolbox_v2.5", "datasets": [{"dataset_uid": "601235", "doi": "10.15784/601235", "keywords": "Antarctica; Inverse Modeling; Model Data; Ocean Currents; Sea Surface; Tidal Models; Tides", "people": "Erofeeva, Svetlana; Padman, Laurence; Howard, Susan L.", "repository": "USAP-DC", "science_program": null, "title": "CATS2008: Circum-Antarctic Tidal Simulation version 2008", "url": "https://www.usap-dc.org/view/dataset/601235"}, {"dataset_uid": "601358", "doi": "10.15784/601358", "keywords": "Antarctica; Oceans; Sea Surface Height; Tide Gauges; Tides", "people": "King, Matt; Padman, Laurence; Howard, Susan L.", "repository": "USAP-DC", "science_program": null, "title": "Antarctic Tide Gauge Database, version 1", "url": "https://www.usap-dc.org/view/dataset/601358"}, {"dataset_uid": "200158", "doi": "", "keywords": null, "people": null, "repository": "GitHub", "science_program": null, "title": "pyTMD", "url": "https://github.com/tsutterley/pyTMD"}, {"dataset_uid": "200156", "doi": "", "keywords": null, "people": null, "repository": "GitHub", "science_program": null, "title": "AntTG_Database_Tools", "url": "https://github.com/EarthAndSpaceResearch/AntTG_Database_Tools"}, {"dataset_uid": "200157", "doi": "", "keywords": null, "people": null, "repository": "GitHub", "science_program": null, "title": "TMD_Matlab_Toolbox_v2.5", "url": "https://github.com/EarthAndSpaceResearch/TMD_Matlab_Toolbox_v2.5"}, {"dataset_uid": "601772", "doi": "10.15784/601772", "keywords": "Antarctica; Cryosphere; Inverse Modeling; Model Data; Ocean Currents; Oceans; Sea Surface; Southern Ocean; Tide Model; Tides", "people": "Sutterley, Tyler; Howard, Susan L.; Greene, Chad A.; Padman, Laurence; Erofeeva, Svetlana", "repository": "USAP-DC", "science_program": null, "title": "CATS2008_v2023: Circum-Antarctic Tidal Simulation 2008, version 2023", "url": "https://www.usap-dc.org/view/dataset/601772"}], "date_created": "Tue, 07 Jul 2020 00:00:00 GMT", "description": "The ocean tide is a large component of total variability of ocean surface height and currents in the seas surrounding Antarctica, including under the floating ice shelves. Maximum tidal height range exceeds 7 m (near the grounding line of Rutford Ice Stream) and maximum tidal currents exceed 1 m/s (near the shelf break in the northwest Ross Sea). Tides contribute to several important climate and ecosystems processes including: ocean mixing, production of dense bottom water, flow of warm Circumpolar Deep Water onto the continental shelves, melting at the bases of ice shelves, fracturing of the ice sheet near a glacier or ice stream\u2019s grounding line, production and decay of sea ice, and sediment resuspension. Tide heights and, in particular, currents can change as the ocean background state changes, and as the geometry of the coastal margins of the Antarctic Ice Sheet varies through ice shelf thickness changes and ice-front and grounding-line advances or retreats. For satellite-based studies of ocean surface height and ice shelf thickness changes, tide heights are a source of substantial noise that must be removed. Similarly, tidal currents can also be a substantial noise signal when trying to estimate mean ocean currents from short-term measurements such as from acoustic Doppler current profilers mounted on ships and CTD rosettes. Therefore, tide models play critical roles in understanding current and future ocean and ice states, and as a method for removing tides in various measurements. A paper in Reviews of Geophysics (Padman, Siegfried and Fricker, 2018, see list of project-related publications below) provides a detailed review of tides and tidal processes around Antarctica.\r\n\nThis project provides a gateway to tide models and a database of tide height coefficients at the Antarctic Data Center, and links to toolboxes to work with these models and data.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e GAUGES \u003e TIDE GAUGES", "is_usap_dc": true, "keywords": "Tide Gauges; OCEAN CURRENTS; Sea Surface Height; USAP-DC; GLACIER MOTION/ICE SHEET MOTION; Tides; Antarctica; MODELS; FIELD INVESTIGATION", "locations": "Antarctica", "north": -40.231, "nsf_funding_programs": "Arctic System Science; Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Howard, Susan L.; Padman, Laurence; Erofeeva, Svetlana; King, Matt", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION; OTHER \u003e MODELS \u003e MODELS", "repo": "USAP-DC", "repositories": "GitHub; USAP-DC", "science_programs": null, "south": -90.0, "title": "Ocean Tides around Antarctica and in the Southern Ocean", "uid": "p0010116", "west": -180.0}, {"awards": "1744570 Galloway, Aaron; 1744550 Amsler, Charles; 1744584 Klein, Andrew; 1744602 Iken, Katrin", "bounds_geometry": "POLYGON((-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-60 -61.772,-60 -62.544,-60 -63.316,-60 -64.088,-60 -64.86,-60 -65.632,-60 -66.404,-60 -67.176,-60 -67.948,-60 -68.72,-61 -68.72,-62 -68.72,-63 -68.72,-64 -68.72,-65 -68.72,-66 -68.72,-67 -68.72,-68 -68.72,-69 -68.72,-70 -68.72,-70 -67.948,-70 -67.176,-70 -66.404,-70 -65.632,-70 -64.86,-70 -64.088,-70 -63.316,-70 -62.544,-70 -61.772,-70 -61))", "dataset_titles": "Average global horizontal solar irradiance at study sites; Carbon and nitrogen isotope data along a gradient at the Antarctic Peninsula; Chemical composition data for Desmarestia menziesii; Chemical composition data for Himantothallus grandifolius; Chemical composition data for Iridaea ; Chemical composition data for Sarcopeltis antarctica ; Computed fetch for project study sites; Five year mean annual and summer sea ice concentration grids for the Western Antarctic Peninsula from AMSR2, National Ice Center Charts and the Sea Ice Index ; Gridded sea ice concentrations from National Ice Center (NIC) Charts 2014-2019 for Western Antarctic Peninsula ; Initial release of code and data associated with Whippo et al. (2024) Fatty acid profiles and stable isotope composition of Antarctic macroalgae: A baseline for a combined biomarker approach in food web studies.; Landsat Sea Ice/Cloud classifications surrounding project study sites; Latitude and longitude data for project study sites; LMG1904 expedition data; Macroalgal species collected along horizontal transect components ; Modelled Solar Irradiance for Western Antarctic Pennisula; Sea Ice Concentration Timeseries for study sites; Underwater transect videos used for community analyses; Underwater video transect community analysis data; VIIRS KD(490) diffuse attenuation coefficients for study sites", "datasets": [{"dataset_uid": "601610", "doi": "10.15784/601610", "keywords": "Antarctica; Antarctic Peninsula; Benthic Communities; Biota; Macroalgae; Macroinvertebrates; Oceans; Video Transects", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Underwater transect videos used for community analyses", "url": "https://www.usap-dc.org/view/dataset/601610"}, {"dataset_uid": "200402", "doi": "10.5281/zenodo.10524919", "keywords": null, "people": null, "repository": "Zendo", "science_program": null, "title": "Initial release of code and data associated with Whippo et al. (2024) Fatty acid profiles and stable isotope composition of Antarctic macroalgae: A baseline for a combined biomarker approach in food web studies.", "url": "https://zenodo.org/records/10524920"}, {"dataset_uid": "200147", "doi": "10.7284/908260", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "LMG1904 expedition data", "url": "https://www.rvdata.us/search/cruise/LMG1904"}, {"dataset_uid": "601330", "doi": "10.15784/601330", "keywords": "Antarctica; Antarctic Peninsula; Biota; LMG1904; R/v Laurence M. Gould; Sample Location", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Latitude and longitude data for project study sites", "url": "https://www.usap-dc.org/view/dataset/601330"}, {"dataset_uid": "601619", "doi": "10.15784/601619", "keywords": "Antarctica; Antarctic Peninsula; Benthic Communities; Biota; Macroalgae; Macroinvertebrates; Oceans; Video Transects", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Underwater video transect community analysis data", "url": "https://www.usap-dc.org/view/dataset/601619"}, {"dataset_uid": "601639", "doi": "10.15784/601639", "keywords": "Antarctica; Antarctic Peninsula; Biota; Fetch; LMG1904; R/v Laurence M. Gould", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Computed fetch for project study sites", "url": "https://www.usap-dc.org/view/dataset/601639"}, {"dataset_uid": "601640", "doi": "10.15784/601640", "keywords": "Antarctica; Biota; Diffuse Attenuation Coefficient; LMG1904; R/v Laurence M. Gould; Turbidity", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "VIIRS KD(490) diffuse attenuation coefficients for study sites", "url": "https://www.usap-dc.org/view/dataset/601640"}, {"dataset_uid": "601641", "doi": "10.15784/601641", "keywords": "Antarctica; Average Global Horizontal Solar Irradiance; Biota; LMG1904; R/v Laurence M. Gould", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Average global horizontal solar irradiance at study sites", "url": "https://www.usap-dc.org/view/dataset/601641"}, {"dataset_uid": "601642", "doi": "10.15784/601642", "keywords": "Antarctica; Antarctic Peninsula; Biota; LMG1904; R/v Laurence M. Gould; Sea Ice Concentration", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Sea Ice Concentration Timeseries for study sites", "url": "https://www.usap-dc.org/view/dataset/601642"}, {"dataset_uid": "601643", "doi": "10.15784/601643", "keywords": "Antarctica; Antarctic Peninsula; LMG1904; National Ice Center Charts; R/v Laurence M. Gould; Sea Ice Concentration", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Gridded sea ice concentrations from National Ice Center (NIC) Charts 2014-2019 for Western Antarctic Peninsula ", "url": "https://www.usap-dc.org/view/dataset/601643"}, {"dataset_uid": "601649", "doi": "10.15784/601649", "keywords": "Antarctica; Antarctic Peninsula; LMG1904; National Ice Center Charts; Sea Ice Concentration", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Five year mean annual and summer sea ice concentration grids for the Western Antarctic Peninsula from AMSR2, National Ice Center Charts and the Sea Ice Index ", "url": "https://www.usap-dc.org/view/dataset/601649"}, {"dataset_uid": "601651", "doi": "10.15784/601651", "keywords": "Antarctica; Antarctic Peninsula; Biota; GIS; GIS Data; LMG1904; R/v Laurence M. Gould; Solar Radiation", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Modelled Solar Irradiance for Western Antarctic Pennisula", "url": "https://www.usap-dc.org/view/dataset/601651"}, {"dataset_uid": "601653", "doi": "10.15784/601653", "keywords": "Antarctica; Antarctic Peninsula; Biota; Carbon; Carbon Isotopes; LMG1904; Nitrogen Isotopes; Oceans", "people": "Iken, Katrin", "repository": "USAP-DC", "science_program": null, "title": "Carbon and nitrogen isotope data along a gradient at the Antarctic Peninsula", "url": "https://www.usap-dc.org/view/dataset/601653"}, {"dataset_uid": "601654", "doi": "10.15784/601654", "keywords": "Antarctica; Antarctic Peninsula; GIS; LANDSAT; LMG1904; Remote Sensing; R/v Laurence M. Gould", "people": "Klein, Andrew", "repository": "USAP-DC", "science_program": null, "title": "Landsat Sea Ice/Cloud classifications surrounding project study sites", "url": "https://www.usap-dc.org/view/dataset/601654"}, {"dataset_uid": "601725", "doi": "10.15784/601725", "keywords": "Antarctica; Antarctic Peninsula", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Macroalgal species collected along horizontal transect components ", "url": "https://www.usap-dc.org/view/dataset/601725"}, {"dataset_uid": "601882", "doi": "10.15784/601882", "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Macroalgae", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Chemical composition data for Desmarestia menziesii", "url": "https://www.usap-dc.org/view/dataset/601882"}, {"dataset_uid": "601883", "doi": "10.15784/601883", "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Macroalgae", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Chemical composition data for Himantothallus grandifolius", "url": "https://www.usap-dc.org/view/dataset/601883"}, {"dataset_uid": "601884", "doi": "10.15784/601884", "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Macroalgae", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Chemical composition data for Iridaea ", "url": "https://www.usap-dc.org/view/dataset/601884"}, {"dataset_uid": "601885", "doi": "10.15784/601885", "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Macroalgae", "people": "Amsler, Charles", "repository": "USAP-DC", "science_program": null, "title": "Chemical composition data for Sarcopeltis antarctica ", "url": "https://www.usap-dc.org/view/dataset/601885"}], "date_created": "Thu, 04 Jun 2020 00:00:00 GMT", "description": "The western Antarctic Peninsula has become a model for understanding cold water communities and how they may be changing in Antarctica and elsewhere. Brown macroalgae (seaweeds) form extensive undersea forests in the northern portion of this region where they play a key role in providing both physical structure and a food (carbon) source for shallow water communities. Yet between Anvers Island (64 degrees S latitude) and Adelaide Island (67 S latitude) these macroalgae become markedly less abundant and diverse. This is probably because the habitat to the south is covered by more sea ice for a longer period, and the sea ice reduces the amount of light that reaches the algae. The reduced macroalgal cover undoubtedly impacts other organisms in the food web, but the ways in which it alters sea-floor community processes and organization is unknown. This project will quantitatively document the macroalgal communities at multiple sites between Anvers and Adelaide Islands using a combination of SCUBA diving, video surveys, and algal collections. Sea ice cover, light levels, and other environmental parameters on community structure will be modelled to determine which factors have the largest influence. Impacts on community structure, food webs, and carbon flow will be assessed through a mixture of SCUBA diving and video surveys. Broader impacts include the training of graduate students and a postdoctoral researcher, as well as numerous informal public education activities including lectures, presentations to K-12 groups, and a variety of social media-based outreach. Macroalgal communities are more abundance and diverse to the north along the Western Antarctic Peninsula, perhaps due to the greater light availability that is associated with shorter period of sea-ice cover. This project will determine the causes and community level consequence of this variation in algal community structure. First, satellite data on sea ice extent and water turbidity will be used to select study sites between 64 S and 69 S where the extent of annual sea ice cover is the primary factor influencing subsurface light levels. Then, variations in macroalgal cover across these study sites will be determined by video line-transect surveys conducted by SCUBA divers. The health, growth, and physiological status of species found at the different sites will be determined by quadrat sampling. The relative importance of macroalgal-derived carbon to the common invertebrate consumers in the foodweb will be assessed with stable isotope and fatty acid biomarker techniques. This will reveal how variation in macroalgal abundance and species composition across the sea ice cover gradient impacts sea floor community composition and carbon flow throughout the food web. In combination, this work will facilitate predictions of how the ongoing reductions in extent and duration of sea ice cover that is occurring in the region as a result of global climate change will impact the structure of nearshore benthic communities. This award reflects NSF\u0027s statutory mission and has been deemed worthy of support through evaluation using the Foundation\u0027s intellectual merit and broader impacts review criteria.", "east": -60.0, "geometry": "POINT(-65 -64.86)", "instruments": null, "is_usap_dc": true, "keywords": "COASTAL; R/V LMG; MACROALGAE (SEAWEEDS); BENTHIC; USAP-DC; Antarctic Peninsula", "locations": "Antarctic Peninsula", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Amsler, Charles; McClintock, James; Iken, Katrin; Galloway, Aaron; Klein, Andrew", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V LMG", "repo": "USAP-DC", "repositories": "R2R; USAP-DC; Zendo", "science_programs": null, "south": -68.72, "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "uid": "p0010104", "west": -70.0}, {"awards": "9725374 Bell, Robin", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "AWI processed ship-based Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990); BGR processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990); CNES processed Gravimeter Data from the Antarctica (Continent) assembled as part of the ADGRAV Data Compilation (1990); Japanese processed Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990); Norwegian Processed ship-based Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990); Russian processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "datasets": [{"dataset_uid": "601281", "doi": null, "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; Ship", "people": "Bell, Robin; Damaske, Detlef", "repository": "USAP-DC", "science_program": null, "title": "BGR processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "url": "https://www.usap-dc.org/view/dataset/601281"}, {"dataset_uid": "601280", "doi": null, "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; PMGRE Il-38", "people": "Andrianov, Sergei; Bell, Robin", "repository": "USAP-DC", "science_program": null, "title": "Russian processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "url": "https://www.usap-dc.org/view/dataset/601280"}, {"dataset_uid": "601279", "doi": null, "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity", "people": "Tronstad, Stein; Bell, Robin", "repository": "USAP-DC", "science_program": null, "title": "Norwegian Processed ship-based Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "url": "https://www.usap-dc.org/view/dataset/601279"}, {"dataset_uid": "601278", "doi": null, "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience", "people": "Biancale, Richard; Bell, Robin", "repository": "USAP-DC", "science_program": null, "title": "CNES processed Gravimeter Data from the Antarctica (Continent) assembled as part of the ADGRAV Data Compilation (1990)", "url": "https://www.usap-dc.org/view/dataset/601278"}, {"dataset_uid": "601277", "doi": null, "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; R/v Polarstern; Weddell Sea", "people": "Jokat, Wilfred; Bell, Robin", "repository": "USAP-DC", "science_program": null, "title": "AWI processed ship-based Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "url": "https://www.usap-dc.org/view/dataset/601277"}, {"dataset_uid": "601282", "doi": null, "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; Ship", "people": "Bell, Robin; Nogi, Yasufumi", "repository": "USAP-DC", "science_program": null, "title": "Japanese processed Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "url": "https://www.usap-dc.org/view/dataset/601282"}], "date_created": "Mon, 13 Apr 2020 00:00:00 GMT", "description": "9725374 Bell The goal of this project is to develop a Web-based Antarctic gravity database to globally facilitate scientific use of gravity data in Antarctic studies. This compilation will provide an important new tool to the Antarctic Earth science community from the geologist placing field observations in a regional context to the seismologist studying continental scale mantle structure. The gravity database will complement the parallel projects underway to develop new continental bedrock (BEDMAP) and magnetic (ADMAP) maps of Antarctica. An international effort will parallel these ongoing projects in contacting the Antarctic geophysical community, identifying existing data sets, agreeing upon protocols for the use of data contributed to the database and finally assembling a new continental scale gravity map. The project has three principal stages. The first stage will be to investigate the accuracy and resolution of currently available high resolution satellite derived gravity data and quantify spatial variations in both accuracy and resolution. The second stage of this project will be to develop an interactive method of accessing existing satellite, shipboard, land based, and airborne gravity data via a Web based interface. The Lamont-Doherty Earth Observatory RIDGE Multi-beam bathymetry database will be used as a template for this project. The existing online RIDGE database allows users to access the raw data, the gridded data and raster images of the seafloor topography. A similar structure will be produced for the existing Antarctic gravity data. The third stage of this project will be to develop an international program to compile existing gravity data south of 60 S. This project will be discussed with leaders of both the ADMAP and BEDMAP efforts and the appropriate working groups of SCAR. A preliminary map of existing gravity data will be presented at the Antarctic Earth Science meeting in Wellington in 1999. A gravity working group meeting will be held in conjunction with the Wellington meeting to reach a consensus on the protocols for placing data into the database. By the completion of the project, existing gravity data will be identified and international protocols for placing this data in the on-line database will have been defined. The process of archiving the gravity data into the database will be an ongoing project as additional data become available.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "NOT APPLICABLE; Antarctica; USAP-DC; GRAVITY FIELD", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Bell, Robin; Small, Christopher", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "The Development of a New Generation Gravity Map of Antarctica", "uid": "p0010092", "west": -180.0}, {"awards": "1443470 Aydin, Murat", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "South Pole ice core (SPC14) discrete methane data; SP19 Gas Chronology; SPC14 carbonyl sulfide, methyl chloride, and methyl bromide measurements from South Pole, Antarctica", "datasets": [{"dataset_uid": "601270", "doi": "10.15784/601270", "keywords": "Antarctica", "people": "Aydin, Murat", "repository": "USAP-DC", "science_program": "SPICEcore", "title": "SPC14 carbonyl sulfide, methyl chloride, and methyl bromide measurements from South Pole, Antarctica", "url": "https://www.usap-dc.org/view/dataset/601270"}, {"dataset_uid": "601380", "doi": "10.15784/601380", "keywords": "Antarctica; Ch4; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ice Core Stratigraphy; Methane; South Pole; SPICEcore", "people": "Epifanio, Jenna", "repository": "USAP-DC", "science_program": "SPICEcore", "title": "SP19 Gas Chronology", "url": "https://www.usap-dc.org/view/dataset/601380"}, {"dataset_uid": "601381", "doi": "10.15784/601381", "keywords": "Antarctica; Ch4; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Ice Core Records; Methane; South Pole; SPICEcore", "people": "Winski, Dominic A.; Epifanio, Jenna; Brook, Edward J.; Buizert, Christo; Kreutz, Karl; Aydin, Murat; Edwards, Jon S.; Sowers, Todd A.; Kahle, Emma; Steig, Eric J.; Osterberg, Erich; Fudge, T. J.; Hood, Ekaterina; Kalk, Michael; Ferris, David G.; Kennedy, Joshua A.; Severinghaus, Jeffrey P.", "repository": "USAP-DC", "science_program": "SPICEcore", "title": "South Pole ice core (SPC14) discrete methane data", "url": "https://www.usap-dc.org/view/dataset/601381"}], "date_created": "Thu, 26 Mar 2020 00:00:00 GMT", "description": "In the past, Earth\u0027s climate underwent dramatic changes that influenced physical, chemical, geological, and biological processes on a global scale. Such changes left an imprint in Earth\u0027s atmosphere, as shown by the variability in abundances of trace gases like carbon dioxide and methane. In return, changes in the atmospheric trace gas composition affected Earth\u0027s climate. Studying compositional variations of the past atmosphere helps us understand the history of interactions between global biogeochemical cycles and Earth?s climate. The most reliable information on past atmospheric composition comes from analysis of air entrapped in polar ice cores. This project aims to generate ice-core records of relatively short-lived, very-low-abundance trace gases to determine the range of past variability in their atmospheric levels and investigate the changes in global biogeochemical cycles that caused this variability. This project measures three such gases: carbonyl sulfide, methyl chloride, and methyl bromide. Changes in carbonyl sulfide can indicate changes in primary productivity and photosynthetic update of carbon dioxide. Changes in methyl chloride and methyl bromide significantly impact natural variability in stratospheric ozone. In addition, the processes that control atmospheric levels of methyl chloride and methyl bromide are shared with those controlling levels of atmospheric methane. The measurements will be made in the new ice core from the South Pole, which is expected to provide a 40,000-year record. The primary focus of this project is to develop high-quality trace gas records for the entire Holocene period (the past 11,000 years), with additional, more exploratory measurements from the last glacial period including the period from 29,000-36,000 years ago when there were large changes in atmospheric methane. Due to the cold temperatures of the South Pole ice, the proposed carbonyl sulfide measurements are expected to provide a direct measure of the past atmospheric variability of this gas without the large hydrolysis corrections that are necessary for interpretation of measurements from ice cores in warmer settings. Furthermore, we will test the expectation that contemporaneous measurements from the last glacial period in the deep West Antarctic Ice Sheet Divide ice core will not require hydrolysis loss corrections. With respect to methyl chloride, we aim to verify and improve the existing Holocene atmospheric history from the Taylor Dome ice core in Antarctica. The higher resolution of our measurements compared with those from Taylor Dome will allow us to derive a more statistically significant relationship between methyl chloride and methane. With respect to methyl bromide, we plan to extend the existing 2,000-year database to 11,000 years. Together, the methyl bromide and methyl chloride records will provide strong measurement-based constraints on the natural variability of stratospheric halogens during the Holocene period. In addition, the methyl bromide record will provide insight into the correlation between methyl chloride and methane during the Holocene period due to common sources and sinks.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "NOT APPLICABLE; CARBONYL SULFIDE; HALOCARBONS AND HALOGENS; TRACE GASES/TRACE SPECIES; Antarctic; USAP-DC", "locations": "Antarctic", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "paleo_time": null, "persons": "Aydin, Murat", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core", "uid": "p0010089", "west": -180.0}, {"awards": "1443371 Fountain, Andrew", "bounds_geometry": "POLYGON((160.2 -77.1,160.57 -77.1,160.94 -77.1,161.31 -77.1,161.68 -77.1,162.05 -77.1,162.42 -77.1,162.79 -77.1,163.16 -77.1,163.53 -77.1,163.9 -77.1,163.9 -77.196,163.9 -77.292,163.9 -77.388,163.9 -77.484,163.9 -77.58,163.9 -77.676,163.9 -77.772,163.9 -77.868,163.9 -77.964,163.9 -78.06,163.53 -78.06,163.16 -78.06,162.79 -78.06,162.42 -78.06,162.05 -78.06,161.68 -78.06,161.31 -78.06,160.94 -78.06,160.57 -78.06,160.2 -78.06,160.2 -77.964,160.2 -77.868,160.2 -77.772,160.2 -77.676,160.2 -77.58,160.2 -77.484,160.2 -77.388,160.2 -77.292,160.2 -77.196,160.2 -77.1))", "dataset_titles": "McMurdo Dry Valleys LTER: A digital archive of human activity in the McMurdo Dry Valleys, Antarctica from 1902 to present", "datasets": [{"dataset_uid": "200086", "doi": "10.6073/pasta/0725cbd31f2af4bca2c6ad145e38dd3a", "keywords": null, "people": null, "repository": "EDI", "science_program": null, "title": "McMurdo Dry Valleys LTER: A digital archive of human activity in the McMurdo Dry Valleys, Antarctica from 1902 to present", "url": "https://doi.org/10.6073/pasta/0725cbd31f2af4bca2c6ad145e38dd3a"}], "date_created": "Thu, 21 Nov 2019 00:00:00 GMT", "description": "Beginning with the discovery of a \"curious valley\" in 1903 by Captain Scott, the McMurdo Dry Valleys (MDV) in Antarctica have been impacted by humans, although there were only three brief visits prior to 1950. Since the late 1950\u0027s, human activity in the MDV has become commonplace in summer, putting pressure on the region\u0027s fragile ecosystems through camp construction and inhabitation, cross-valley transport on foot and via vehicles, and scientific research that involves sampling and deployment of instruments. Historical photographs, put alongside information from written documentation, offer an invaluable record of the changing patterns of human activity in the MDV. Photographic images often show the physical extent of field camps and research sites, the activities that were taking place, and the environmental protection measures that were being followed. Historical photographs of the MDV, however, are scattered in different places around the world, often in private collections, and there is a real danger that many of these photos may be lost, along with the information they contain. This project will collect and digitize historical photographs of sites of human activity in the MDV from archives and private collections in the United States, New Zealand, and organize them both chronologically and spatially in a GIS database. Sites of past human activities will be re-photographed to provide comparisons with the present, and re-photography will assist in providing spatial data for historical photographs without obvious location information. The results of this analysis will support effective environmental management into the future. The digital photo archive will be openly available through the McMurdo Dry Valleys Long Term Ecological Research (MCM LTER) website (www.mcmlter.org), where it can be used by scientists, environmental managers, and others interested in the region. The central question of this project can be reformulated as a hypothesis: Despite an overall increase in human activities in the MDV, the spatial range of these activities has become more confined over time as a result of an increased awareness of ecosystem fragility and efforts to manage the region. To address this hypothesis, the project will define the spatial distribution and temporal frequency of human activity in the MDV. Photographs and reports will be collected from archives with polar collections such as the National Archives of New Zealand in Wellington and Christchurch and the Byrd Polar Research Center in Ohio. Private photograph collections will be accessed through personal connections, social media, advertisements in periodicals such as The Polar Times, and other means. Re-photography in the field will follow established techniques and will create benchmarks for future research projects. The spatial data will be stored in an ArcGIS database for analysis and quantification of the human footprint over time in the MDV. The improved understanding of changing patterns of human activity in the MDV provided by this historical photo archive will provide three major contributions: 1) a fundamentally important historic accounting of human activity to support current environmental management of the MDV; 2) defining the location and type of human activity will be of immediate benefit in two important ways: a) places to avoid for scientists interested in sampling pristine landscapes, and, b) targets of opportunity for scientists investigating the long-term environmental legacy of human activity; and 3) this research will make an innovative contribution to knowledge of the environmental history of the MDV.", "east": 163.9, "geometry": "POINT(162.05 -77.58)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "CONTAMINANT LEVELS/SPILLS; Antarctica; NOT APPLICABLE; USAP-DC", "locations": "Antarctica", "north": -77.1, "nsf_funding_programs": "Antarctic Integrated System Science", "paleo_time": null, "persons": "Fountain, Andrew; Howkins, Adrian", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "EDI", "repositories": "EDI", "science_programs": null, "south": -78.06, "title": "Collaborative Research: Assessing Changing Patterns of Human Activity in the McMurdo Dry Valleys using Digital Photo Archives", "uid": "p0010066", "west": 160.2}, {"awards": "1443248 Hall, Brenda; 1443346 Stone, John", "bounds_geometry": "POLYGON((-174 -84.2,-172.4 -84.2,-170.8 -84.2,-169.2 -84.2,-167.6 -84.2,-166 -84.2,-164.4 -84.2,-162.8 -84.2,-161.2 -84.2,-159.6 -84.2,-158 -84.2,-158 -84.36,-158 -84.52,-158 -84.68,-158 -84.84,-158 -85,-158 -85.16,-158 -85.32,-158 -85.48,-158 -85.64,-158 -85.8,-159.6 -85.8,-161.2 -85.8,-162.8 -85.8,-164.4 -85.8,-166 -85.8,-167.6 -85.8,-169.2 -85.8,-170.8 -85.8,-172.4 -85.8,-174 -85.8,-174 -85.64,-174 -85.48,-174 -85.32,-174 -85.16,-174 -85,-174 -84.84,-174 -84.68,-174 -84.52,-174 -84.36,-174 -84.2))", "dataset_titles": "Cosmogenic nuclide data from glacial deposits along the Liv Glacier coast; Ice-D Antarctic Cosmogenic Nuclide database - site DUNCAN; Ice-D Antarctic Cosmogenic Nuclide database - site MAASON; Liv and Amundsen Glacier Radiocarbon Data", "datasets": [{"dataset_uid": "601226", "doi": "10.15784/601226", "keywords": "Antarctica; Be-10; Beryllium-10; Cosmogenic; Cosmogenic Dating; Cosmogenic Radionuclides; Deglaciation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Liv Glacier; Rocks; Ross Ice Sheet; Surface Exposure Dates; Transantarctic Mountains", "people": "Stone, John", "repository": "USAP-DC", "science_program": null, "title": "Cosmogenic nuclide data from glacial deposits along the Liv Glacier coast", "url": "https://www.usap-dc.org/view/dataset/601226"}, {"dataset_uid": "200087", "doi": "", "keywords": null, "people": null, "repository": "ICE-D", "science_program": null, "title": "Ice-D Antarctic Cosmogenic Nuclide database - site MAASON", "url": "https://version2.ice-d.org/antarctica/nsf/"}, {"dataset_uid": "200088", "doi": "", "keywords": null, "people": null, "repository": "ICE-D", "science_program": null, "title": "Ice-D Antarctic Cosmogenic Nuclide database - site DUNCAN", "url": "https://version2.ice-d.org/antarctica/nsf/"}, {"dataset_uid": "601208", "doi": "10.15784/601208", "keywords": "Antarctica; Carbon; Glaciology; Holocene; Radiocarbon; Ross Embayment; Ross Sea; Transantarctic Mountains", "people": "Hall, Brenda", "repository": "USAP-DC", "science_program": null, "title": "Liv and Amundsen Glacier Radiocarbon Data", "url": "https://www.usap-dc.org/view/dataset/601208"}], "date_created": "Thu, 05 Sep 2019 00:00:00 GMT", "description": "The response of the Antarctic Ice Sheet to future climatic changes is recognized as the greatest uncertainty in projections of future sea level. An understanding of past ice fluctuations affords insight into ice-sheet response to climate and sea-level change and thus is critical for improving sea-level predictions. This project will examine deglaciation of the southern Ross Sea over the past few thousand years to document oscillations in Antarctic ice volume during a period of relatively stable climate and sea level. We will help quantify changes in ice volume, improve understanding of the ice dynamics responsible, and examine the implications for future sea-level change. The project will train future scientists through participation of graduate students, as well as undergraduates who will develop research projects in our laboratories. Previous research indicates rapid Ross Sea deglaciation as far south as Beardmore Glacier early in the Holocene epoch (which began approximately 11,700 years before present), followed by more gradual recession. However, deglaciation in the later half of the Holocene remains poorly constrained, with no chronological control on grounding-line migration between Beardmore and Scott Glaciers. Thus, we do not know if mid-Holocene recession drove the grounding line rapidly back to its present position at Scott Glacier, or if the ice sheet withdrew gradually in the absence of significant climate forcing or eustatic sea level change. The latter possibility raises concerns for future stability of the Ross Sea grounding line. To address this question, we will map and date glacial deposits on coastal mountains that constrain the thinning history of Liv and Amundsen Glaciers. By extending our chronology down to the level of floating ice at the mouths of these glaciers, we will date their thinning history from glacial maximum to present, as well as migration of the Ross Sea grounding line southwards along the Transantarctic Mountains. High-resolution dating will come from Beryllium-10 surface-exposure ages of erratics collected along elevation transects, as well as Carbon-14 dates of algae within shorelines from former ice-dammed ponds. Sites have been chosen specifically to allow close comparison of these two dating methods, which will afford constraints on Antarctic Beryllium-10 production rates.", "east": -158.0, "geometry": "POINT(-166 -85)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "GLACIERS/ICE SHEETS; NOT APPLICABLE; Antarctica; ICE SHEETS; USAP-DC", "locations": "Antarctica", "north": -84.2, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "paleo_time": null, "persons": "Hall, Brenda; Stone, John", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "USAP-DC", "repositories": "ICE-D; USAP-DC", "science_programs": null, "south": -85.8, "title": "Collaborative Research: High-resolution Reconstruction of Holocene Deglaciation in the Southern Ross Embayment", "uid": "p0010053", "west": -174.0}, {"awards": "1643735 Li, Yun; 1643901 Zhang, Weifeng; 2021245 Li, Yun", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Dynamic fine-scale sea-icescape shapes adult emperor penguin foraging habitat in East Antarctica; Monthly Stratification Climatology (1978-2021) in Antarctic Coastal Polynyas", "datasets": [{"dataset_uid": "601209", "doi": "10.15784/601209", "keywords": "Animal Behavior Observation; Antarctica; Biota; East Antarctica; GPS; Oceans; Penguin; Southern Ocean", "people": "Pinaud, David; Wienecke, Barbara; Kirkwood, Roger; Ropert-Coudert, Yan; Resinger, Ryan; Jonsen, Ian; Porter-Smith, Rick; Barbraud, Christophe; Ji, Rubao; Jenouvrier, Stephanie; Sumner, Michael; Bost, Charles-Andr\u00e9; Labrousse, Sara; Fraser, Alexander; Tamura, Takeshi", "repository": "USAP-DC", "science_program": null, "title": "Dynamic fine-scale sea-icescape shapes adult emperor penguin foraging habitat in East Antarctica", "url": "https://www.usap-dc.org/view/dataset/601209"}, {"dataset_uid": "601628", "doi": "10.15784/601628", "keywords": "Antarctic; Antarctica; Antarctic Coastal Polynyas; Polynya", "people": "Zhang, Weifeng; Shunk, Nathan; Li, Yun", "repository": "USAP-DC", "science_program": null, "title": "Monthly Stratification Climatology (1978-2021) in Antarctic Coastal Polynyas", "url": "https://www.usap-dc.org/view/dataset/601628"}], "date_created": "Wed, 07 Aug 2019 00:00:00 GMT", "description": "During winter, sea-ice coverage along the Antarctic coast is punctuated by numerous polynyas--isolated openings of tens to hundreds of kilometer wide. These coastal polynyas are hotspots of sea ice production and the primary source regions of the bottom water in the global ocean. They also host high levels of biological activities and are the feeding grounds of Emperor penguins and marine mammals. The polynyas are a key component of the Antarctic coastal system and crucial for the survival of penguins and many other species. These features also differ dramatically from each other in timing of formation, duration, phytoplankton growth season, and overall biological productivity. Yet, the underlying reasons for differences among them are largely unknown. This project studies the fundamental biophysical processes at a variety of polynyas, examines the connection between the physical environment and the phytoplankton and penguin ecology, and investigates the mechanisms behind polynya variability. The results of this interdisciplinary study will provide a context for interpretation of field measurements in Antarctic coastal polynyas, set a baseline for future polynya studies, and examine how polynya ecosystems may respond to local and large-scale environmental changes. The project will include educational and outreach activities that convey scientific messages to a broad audience. It aims to increase public awareness of the interconnection between large-scale environmental change and Antarctic coastal systems. The main objectives of this study are to form a comprehensive understanding of the temporal and spatial variability of Antarctic coastal polynyas and the physical controls of polynya ecosystems. The project takes an interdisciplinary approach and seeks to establish a modeling system centered on the Regional Ocean Modeling System. This system links the ice and ocean conditions to the plankton ecology and penguin population. Applications of the modeling system in representative polynyas, in conjunction with analysis of existing observations, will determine the biophysical influences of individual forcing factors. In particular, this study will test a set of hypothesized effects of winds, offshore water intrusion, ice-shelf melting, sea-ice formation, glacier tongues, and ocean stratification on the timing of polynya phytoplankton bloom and the overall polynya biological productivity. The project will also examine how changing polynya state affects penguin breeding success, adult survival, and population growth. The team will conduct idealized sensitivity analysis to explore implications of forcing variability, including local and large-scale environmental change, on Antarctic coastal ecosystems.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Southern Ocean; Animal Behavior; Penguin; FIELD INVESTIGATION; USAP-DC; COASTAL; PENGUINS; SEA ICE; Antarctica; OCEAN MIXED LAYER", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "paleo_time": null, "persons": "Zhang, Weifeng; Ji, Rubao; Jenouvrier, Stephanie; Maksym, Edward; Li, Yun", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Collaborative Research: Polynyas in Coastal Antarctica (PICA): Linking Physical Dynamics to Biological Variability", "uid": "p0010044", "west": -180.0}, {"awards": "1543412 Reinfelder, John", "bounds_geometry": null, "dataset_titles": "16S rRNA gene libraries of krill gut microbial communities; Microbial gene libraries of krill gut microbial communities", "datasets": [{"dataset_uid": "200024", "doi": "", "keywords": null, "people": null, "repository": "NCBI GenBank", "science_program": null, "title": "Microbial gene libraries of krill gut microbial communities", "url": "https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fbioproject%2F531145\u0026amp;data=02%7C01%7Creinfeld%40envsci.rutgers.edu%7C7e30a0192dc748ab271408d6b9d57d08%7Cb92d2b234d35447093ff69aca6632ffe%7C1%7C0%7C636900723909188941\u0026amp;sdata=G6cNg4bBHzeikrWSCYITcT6XS3NLWwjQ1yNdwtrALPc%3D\u0026amp;reserved=0"}, {"dataset_uid": "601171", "doi": "10.15784/601171", "keywords": "Antarctica; Biota; Krill; LTER Palmer Station; Microbiome; Oceans; Southern Ocean", "people": "Reinfelder, John", "repository": "USAP-DC", "science_program": "LTER", "title": "16S rRNA gene libraries of krill gut microbial communities", "url": "https://www.usap-dc.org/view/dataset/601171"}], "date_created": "Sun, 31 Mar 2019 00:00:00 GMT", "description": "Marine food webs can concentrate monomethylmercury (MMHg), a neurotoxin in mammals, in upper trophic level consumers. Despite their remoteness, coastal Antarctic marine ecosystems accumulate and biomagnify MMHg to levels observed at lower latitudes and in the Arctic. Marine sediments and other anoxic habitats in the oceans are typical areas where methylation of mercury occurs and these are likely places where MMHg is being produced. Krill, and more specifically their digestive tracts, may be a previously unaccounted for site where the production of MMHg may be occurring in the Antarctic. If monomethylmercury production is occurring in krill, current views regarding bioaccumulation in the food web and processes leading to the production and accumulation of mercury in the Antarctic Ocean could be better informed, if not transformed. This project will conduct a preliminary assessment of the krill gut microbiomes, the microbiome\u0027s genomic content and potential for production of monomethyl mercury by detecting the genes involved in mercury transformations. By analyzing the krill gut microbiome, the project will provide insights regarding animal-microbe interactions and their potential role in globally important biogeochemical cycles. This project will conduct a preliminary assessment of the krill gut microbiomes, the microbiomes genomic content and potential for production of monomethylmercury. The diversity and metabolic profiles of microorganisms in krill digestive tracts will be evaluated using massively parallel Illumina DNA sequencing technology to produce 16S rRNA gene libraries and assembled whole metagenomes. The project will also quantify the abundance and expression of Hg methylation genes, hgcAB, and identify their taxonomic affiliations in the microbiome communities. Environmental metagenomes, 16S rRNA gene inventories produced from this project will provide the polar science community with valuable databases and experimental tools with which to examine coastal Antarctic microbial ecology and biogeochemistry. The project will seek to provide a wider window into the diversity of extremophile microbial communities and the identification of potentially unique and useful bioactive compounds. In addition to public education and outreach. This project will train graduate students and provide educational and outreach opportunities at the participating institutions", "east": -68.2816, "geometry": "POINT(-69.09295 -66.8017)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "USAP-DC; Antarctica; NOT APPLICABLE; BACTERIA/ARCHAEA", "locations": "Antarctica", "north": -65.8708, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Schaefer, Jeffra; Reinfelder, John; Barkar, T.", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "NCBI GenBank", "repositories": "NCBI GenBank; USAP-DC", "science_programs": "LTER", "south": -67.7326, "title": "Methylmercury in Antarctic Krill Microbiomes", "uid": "p0010023", "west": -69.9043}, {"awards": "1457577 Wise, Sherwood", "bounds_geometry": null, "dataset_titles": null, "datasets": null, "date_created": "Thu, 21 Feb 2019 00:00:00 GMT", "description": "This proposal would provide funding for continued operation of the Antarctic Marine Geology Research Facility (AMGRF) at Florida State University. This facility is the NSF repository of sediment cores from the ocean floor surrounding Antarctica, and makes sediment cores available to the entire scientific community, providing the equipment and knowledge necessary for scientists to collect samples for specialized measurements. The sediments provide a record of past climate, ocean circulation, and ice sheet history, and were recovered at great cost using piston cores deployed from research vessels and rotary coring from drilling platforms. The funding supports a curator, an assistant curator, and a student work force from FSU. This staff supports visiting scientists, manages the collections and the equipment used for core characterization and sampling, and maintain data bases. The AMGRF houses a unique collection of sediment cores from the Southern Oceans and has served in this role for the past 50 years. The Antarctic Marine Geology Research Facility (AMGRF) at Florida State University, the NSF repository of Southern Ocean piston- and drill-cores, has been conducting marine geological research and providing numerous services to the Antarctic and Earth Science Community in its present building for the past 50 years. This proposal requests operating funds to (a) continue provide these services, (b) manage archives and databases, (c) complete necessary upgrades of the AMGRF Cold-Room, and (d) continue our education and outreach programs for students and the general public. The AMGRF archives and curates more than 23,000 m of cored sediment (over 7,000 cores) collected by United States Antarctic Program (USAP) vessels. The Facility also archives and curates some 5,500 m of rotary-cored material from international programs such as ANDRILL. The standard core processing services include core splitting, Multi-Sensor Track analyses, core photography, whole-core x-rays, etc., core description publications (macroscopic and microscopic), and core sampling. Facility personnel also provide curatorial support services to field-based projects upon request. Analytical equipment at the AMGRF serves the research needs of Facility personnel (for the generation of detailed core descriptions), NSF Principal Investigators involved with the United States Antarctic Program (USAP), and qualified users from the scientific community in the U.S. and beyond. This equipment provides users of the Facility with the necessary tools to rapidly and objectively analyze the piston cores and drill cores sent to the Facility each year. The AMGRF maintains a core and sample database with the latest map-sample search capabilities that can be accessed through the continuously upgraded Facility website. This searchable database contains basic information about all the cores stored at the facility, as well as information on samples taken from 1964 to the present. In addition to the sediment core archives the AMGRF also keeps archives of ship and deck-logs, a collection of ca. 862,000 microscope slides, and a library of AMGRF related publications. Facility personnel routinely provide tours and lectures for students and the general public.", "east": null, "geometry": null, "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "MARINE SEDIMENTS; USAP-DC; NOT APPLICABLE; Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Salters, Vincent", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repositories": null, "science_programs": null, "south": null, "title": "Curation of National Antarctic Sediment Collections", "uid": "p0010014", "west": null}, {"awards": "1142115 Dunbar, Nelia", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "No data submitted yet, but submission to Antarctic tephra database is planned", "datasets": [{"dataset_uid": "002571", "doi": "", "keywords": null, "people": null, "repository": "in progress", "science_program": null, "title": "No data submitted yet, but submission to Antarctic tephra database is planned", "url": "http://www.tephrochronology.org/AntT/about.html"}], "date_created": "Sun, 10 Jun 2018 00:00:00 GMT", "description": "Dunbar/1142115 This award supports a project to investigate the extremely rich volcanic record in the WAIS Divide ice core as part of this ongoing tephrochronology research in Antarctica. Ice cores in Polar Regions offer unparalleled records of earth\u0027s climate over the past 500,000 years. Accurate chronology of individual ice cores and chronological correlations between different ice cores is critically important to the interpretation of the climate record. The field of Antarctic tephrochronology has been progressing steadily, and is on the cusp of having a fully integrated tephra framework for large parts of the continent. Major advances in this field have been made due to the acquisition of a number of ice cores with strong volcanic records, improvement of analytical techniques and better characterization of source eruptions due in part to through studies of englacial tephra from several major blue ice areas. The intellectual merit of this work is that the tephrochonological studies will provide independently dated time-stratigraphic markers in the ice core, particularly for the deepest ice, linking tephra layers between the WAIS Divide core and the Siple Dome core which will allow detailed comparisons to be made of coastal and inland climate. It will also contribute to a better understanding of eruption magnitude, dispersal patterns and geochemical evolution of West Antarctic volcanoes. The work will also contribute to a new tephra dataset to the literature for use in future ice core studies. The broader impacts of this project fall into the areas of education, outreach and international cooperation. This project will employ one New Mexico Tech graduate student, but will also be featured in outreach programs for NMT undergraduates, as well as teacher and student groups and outreach for the general public in New Mexico. NMT is an Hispanic serving institution (25% Hispanic students) and also found by NSF to rank 15th nationwide in \"baccalaureate-origin\" institutions for doctoral recipients in science and engineering, thereby having a disproportionately large effect on producing Hispanic scientists and engineers. However, probably the most significant broader impact of this project will be the continued efforts of the PI in fostering and promoting of international cooperation in the tephra-in-ice community. Dunbar has been collaborating with European tephra researchers for a number of years, sharing data and working collaboratively on tephra correlations, and these activities have lead to, and will continue to promote, forward progress in integrating the Antarctic tephrochronology record. This proposal does not require field work in the Antarctic.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "NOT APPLICABLE; USAP-DC", "locations": null, "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "paleo_time": null, "persons": "Dunbar, Nelia", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "in progress", "repositories": "in progress", "science_programs": null, "south": -90.0, "title": "Tephrochronology of the WAIS Divide Ice Core: Linking Ice Cores through Volcanic Records", "uid": "p0000338", "west": -180.0}, {"awards": "1246353 Anderson, John", "bounds_geometry": "POLYGON((-180 -74,-144.9 -74,-109.8 -74,-74.7 -74,-39.6 -74,-4.5 -74,30.6 -74,65.7 -74,100.8 -74,135.9 -74,171 -74,171 -74.3,171 -74.6,171 -74.9,171 -75.2,171 -75.5,171 -75.8,171 -76.1,171 -76.4,171 -76.7,171 -77,135.9 -77,100.8 -77,65.7 -77,30.6 -77,-4.5 -77,-39.6 -77,-74.7 -77,-109.8 -77,-144.9 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -77,180 -76.7,180 -76.4,180 -76.1,180 -75.8,180 -75.5,180 -75.2,180 -74.9,180 -74.6,180 -74.3,180 -74,180 -74,180 -74,180 -74,180 -74,180 -74,180 -74,180 -74,180 -74,180 -74,-180 -74))", "dataset_titles": "Circum-Antarctic grounding-line sinuosity; NBP1502A Cruise Core Data; NBP1502 Cruise Geophysics and underway data; Pennell Trough, Ross Sea bathymetry and glacial landforms", "datasets": [{"dataset_uid": "601484", "doi": "10.15784/601484", "keywords": "Antarctica; Bed Roughness; Bed Slope; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Pinning Points", "people": "Riverman, Kiya; Stearns, Leigh; Simkins, Lauren", "repository": "USAP-DC", "science_program": null, "title": "Circum-Antarctic grounding-line sinuosity", "url": "https://www.usap-dc.org/view/dataset/601484"}, {"dataset_uid": "601474", "doi": "10.15784/601474", "keywords": "Antarctica; Bathymetry; Elevation; Geomorphology; Glacial History; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marine Geoscience; NBP1502; Pennell Trough; Ross Sea; R/v Nathaniel B. Palmer", "people": "Simkins, Lauren; Prothro, Lindsay; Anderson, John; Greenwood, Sarah; Eareckson, Elizabeth; Munevar Garcia, Santiago", "repository": "USAP-DC", "science_program": null, "title": "Pennell Trough, Ross Sea bathymetry and glacial landforms", "url": "https://www.usap-dc.org/view/dataset/601474"}, {"dataset_uid": "000245", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "NBP1502 Cruise Geophysics and underway data", "url": "https://www.rvdata.us/search/cruise/NBP1502"}, {"dataset_uid": "601083", "doi": "10.15784/601083", "keywords": "Antarctica; Chemistry:sediment; Chemistry:Sediment; Geochronology; Marine Geoscience; Marine Sediments; NBP1502; R/v Nathaniel B. Palmer; Sediment Core", "people": "Prothro, Lindsay; Simkins, Lauren; Anderson, John", "repository": "USAP-DC", "science_program": null, "title": "NBP1502A Cruise Core Data", "url": "https://www.usap-dc.org/view/dataset/601083"}], "date_created": "Tue, 06 Feb 2018 00:00:00 GMT", "description": "Intellectual Merit: The PI hypothesizes that bedforms found in the Central and Joides troughs can be interpreted as having been formed by rapid retreat, and possible collapse of an ice stream that occupied this area. To test this hypothesis, the PI proposes to conduct a detailed marine geological and geophysical survey of Central and Joides Troughs in the western Ross Sea. This project will bridge gaps between the small and isolated areas previously surveyed and will acquire a detailed sedimentological record of the retreating grounding line. The PI will reconstruct the retreat history of the Central and Joides troughs to century-scale resolution using radiocarbon dating methods and by looking at geomorphic features that are formed at regular time intervals. Existing multibeam, deep tow side-scan sonar, and core data will provide a framework for this research. The western Ross Sea is an ideal study area to investigate a single ice stream and the dynamics controlling its stability, including interactions between both East and West Antarctic Ice Sheets. Broader impacts: This proposal includes a post-doc, a graduate and two undergraduate students. The post-doc is involved with teaching an in-service K-12 teacher development and training course at Rice University for high-need teachers with a focus on curriculum enhancement. The project fosters collaboration for the PI and students with researchers at Louisiana State University and international colleagues at the Institute for Paleobiology at the Polish Academy of Sciences. The results from this project could lead to a better understanding of ice sheet and ice stream stability. This project will yield implications for society\u0027s understanding of climate change, as this work improves understanding of the behavior of ice sheets and their links to global climate.", "east": 179.99, "geometry": "POINT(175.495 -75.5)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e CORERS \u003e CORING DEVICES; IN SITU/LABORATORY INSTRUMENTS \u003e CORERS \u003e SEDIMENT CORERS; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e CARBON ANALYZERS", "is_usap_dc": true, "keywords": "AMD; Amd/Us; USAP-DC; USA/NSF; R/V NBP; NBP1502", "locations": null, "north": -74.0, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Anderson, John", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "USAP-DC", "repositories": "R2R; USAP-DC", "science_programs": null, "south": -77.0, "title": "Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum.", "uid": "p0000395", "west": 171.0}, {"awards": "1141906 Grunow, Anne", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Rock Samples", "datasets": [{"dataset_uid": "000224", "doi": "", "keywords": null, "people": null, "repository": "PRR", "science_program": null, "title": "Rock Samples", "url": "http://research.bpcrc.osu.edu/rr/"}], "date_created": "Tue, 07 Nov 2017 00:00:00 GMT", "description": "Project Summary Intellectual Merit: The United States Polar Rock Repository (USPRR) was established to curate and loan geologic samples from polar regions to researchers and educators. OPP established the USPRR in part to avoid redundant sample collection and thus reduce the environmental impact of polar research. The USPRR also provides the research community with an important resource for developing new research projects. The USPRR acquires rock collections through donations from institutions and scientists and makes these samples available as no-cost loans for research, education and museum exhibits. Sample metadata is available in an on-line database. The database also includes rock property information, such as magnetic susceptibility and specific gravity, which are useful for geophysical studies. Researchers may request samples for analysis using an online request form. The USPRR fulfills several data management directives, including the Scientific Committee on Antarctic Research, Antarctic Data Management directive of providing free, full and open access to both metadata and the samples. The intellectual merit of the USPRR lies in the global dissemination of scientific information to researchers. Broader impacts: The broader impacts of the USPRR include lessening environmental impacts resulting from redundant fieldwork in Polar Regions. The USPRR provides educational information about Antarctica via the website, by visiting the repository or borrowing a \"USPRR rock box\". Working at the repository provides students with opportunities to learn about the geology of Antarctica as well as doing research, learning new skills in digital imaging, curation and database management.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Grunow, Anne", "platforms": "Not provided", "repo": "PRR", "repositories": "PRR", "science_programs": null, "south": -90.0, "title": "Continuing Operations Proposal: The United States Polar Rock Repository as a Research Tool for Understanding Antarctica\u0027s Geological Evolution", "uid": "p0000387", "west": -180.0}, {"awards": "1341712 Hallet, Bernard", "bounds_geometry": "POLYGON((160.9 -76.7,161.08 -76.7,161.26 -76.7,161.44 -76.7,161.62 -76.7,161.8 -76.7,161.98 -76.7,162.16 -76.7,162.34 -76.7,162.52 -76.7,162.7 -76.7,162.7 -76.79,162.7 -76.88,162.7 -76.97,162.7 -77.06,162.7 -77.15,162.7 -77.24,162.7 -77.33,162.7 -77.42,162.7 -77.51,162.7 -77.6,162.52 -77.6,162.34 -77.6,162.16 -77.6,161.98 -77.6,161.8 -77.6,161.62 -77.6,161.44 -77.6,161.26 -77.6,161.08 -77.6,160.9 -77.6,160.9 -77.51,160.9 -77.42,160.9 -77.33,160.9 -77.24,160.9 -77.15,160.9 -77.06,160.9 -76.97,160.9 -76.88,160.9 -76.79,160.9 -76.7))", "dataset_titles": "Long-term rock abrasion study in the Dry Valleys", "datasets": [{"dataset_uid": "601060", "doi": "10.15784/601060", "keywords": "Antarctica; Dry Valleys; Geology/Geophysics - Other; Rocks", "people": "Hallet, Bernard; Sletten, Ronald S.; Malin, Michael", "repository": "USAP-DC", "science_program": null, "title": "Long-term rock abrasion study in the Dry Valleys", "url": "https://www.usap-dc.org/view/dataset/601060"}], "date_created": "Fri, 13 Oct 2017 00:00:00 GMT", "description": "Paragraph for Public Audiences: Many of the natural processes that modify the landscape inhabited by humans occur over very long timescales, making them difficult to observe. Exceptions include rare catastrophic events such as earthquakes, volcanic eruptions, and floods that occur on short timescales. Many significant processes that affect the land and landscape that we inhabit operate on time scales imperceptible to humans. One of these processes is wind transport of sand, with related impacts to exposed rock surfaces and man-made objects, including buildings, windshields, solar panels and wind-farm turbine blades. The goal of this project is to gain an understanding of wind erosion processes over long timescales, in the Antarctic Dry Valleys, a cold desert environment where there were no competing processes (such as rain and vegetation) that might mask the effects. The main objective is recovery of rock samples that were deployed in 1983/1984 at 11 locations in the Antarctic Dry Valleys, along with measurements on the rock samples and characterization of the sites. In the late 1980\u0027s and early 1990\u0027s some of these samples were returned and indicated more time was needed to accumulate information about the timescales and impacts of the wind erosion processes. This project will allow collection of the remaining samples from this experiment after 30 to 31 years of exposure. The field work will be carried out during the 2014/15 Austral summer. The results will allow direct measurement of the abrasion rate and hence the volumes and timescales of sand transport; this will conclude the longest direct examination of such processes ever conducted. Appropriate scaling of the results may be applied to buildings, vegetation (crops), and other aspects of human presence in sandy and windy locations, in order to better determine the impact of these processes and possible mitigation of the impacts. The project is a collaborative effort between a small business, Malin Space Science Systems (MSSS), and the University of Washington (UW). MSSS will highlight this Antarctic research on its web site, by developing thematic presentations describing our research and providing a broad range of visual materials. The public will be engaged through daily updates on a website and through links to material prepared for viewing in Google Earth. UW students will be involved in the laboratory work and in the interpretation of the results. Technical Description of Project: The goal of this project is to study the role of wind abrasion by entrained particles in the evolution of the McMurdo Dry Valleys in the Transantarctic Mountains. During the 1983 to 1984 field seasons, over 5000 rock targets were installed at five heights facing the 4 cardinal directions at 10 locations (with an additional site containing fewer targets) to study rates of physical weathering due primarily to eolian abrasion. In addition, rock cubes and cylinders were deployed at each site to examine effects of chemical weathering. The initial examination of samples returned after 1, 5, and 10 years of exposure, showed average contemporary abrasion rates consistent with those determined by cosmogenic isotope studies, but further stress that \"average\" should not be interpreted as meaning \"uniform.\" The samples will be characterized using mass measurements wtih 0.01 mg precision balances, digital microphotography to compare the evolution of their surface features and textures, SEM imaging to examine the micro textures of abraded rock surfaces, and optical microscopy of thin sections of a few samples to examine the consequences of particle impacts extending below the abraded surfaces. As much as 60-80% of the abrasion measured in samples from 1984-1994 appears to have occurred during a few brief hours in 1984. This is consistent with theoretical models that suggest abrasion scales as the 5th power of wind velocity. The field work will allow return of multiple samples after three decades of exposure, which will provide a statistical sampling (beyond what is acquired by studying a single sample), and will yield the mass loss data in light of complementary environmental and sand kinetic energy flux data from other sources (e.g. LTER meteorology stations). This study promises to improve insights into one of the principal active geomorphic process in the Dry Valleys, an important cold desert environment, and the solid empirical database will provide general constraints on eolian abrasion under natural conditions.", "east": 162.7, "geometry": "POINT(161.8 -77.15)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -76.7, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Hallet, Bernard; Sletten, Ronald S.", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6, "title": "Collaborative Proposal: Decades-long Experiment on Wind-Driven Rock Abrasion in the Ice-Free Valleys, Antarctica", "uid": "p0000074", "west": 160.9}, {"awards": "1142007 Kurbatov, Andrei", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Antarctic Ice Core Tephra Analysis; Antarctic Tephra Data Base AntT static web site", "datasets": [{"dataset_uid": "601052", "doi": "10.15784/601052", "keywords": "Antarctica; Geochemistry; Geochronology; Glaciology; Intracontinental Magmatism; IntraContinental Magmatism; Sample/collection Description; Sample/Collection Description; Tephra", "people": "Dunbar, Nelia; Kurbatov, Andrei V.", "repository": "USAP-DC", "science_program": null, "title": "Antarctic Tephra Data Base AntT static web site", "url": "https://www.usap-dc.org/view/dataset/601052"}, {"dataset_uid": "601038", "doi": "10.15784/601038", "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Intracontinental Magmatism; IntraContinental Magmatism; Tephra", "people": "Kurbatov, Andrei V.", "repository": "USAP-DC", "science_program": "SPICEcore", "title": "Antarctic Ice Core Tephra Analysis", "url": "https://www.usap-dc.org/view/dataset/601038"}], "date_created": "Fri, 06 Oct 2017 00:00:00 GMT", "description": "Many key questions in climate research (e.g. relative timing of climate events in different geographic areas, climate-forcing mechanisms, natural threshold levels in the climate system) are dependent on accurate reconstructions of the temporal and spatial distribution of past rapid climate change events in continental, atmospheric, marine and polar realms. This collaborative interdisciplinary research project aims to consolidate, into a single user-friendly database, information about volcanic products detected in Antarctica. By consolidating information about volcanic sources, and physical and geochemical characteristics of volcanic products, this systematic data collection approach will improve the ability of researchers to identify volcanic ash, or tephra, from specific volcanic eruptions that may be spread over large areas in a geologically instantaneous amount of time. Development of this database will assist in the identification and cross-correlation of time intervals in various paleoclimate archives that contain volcanic layers from often unknown sources. The AntT project relies on a cyberinfrastructure framework developed in house through NSF funded CDI-Type I: CiiWork for data assimilation, interpretation and open distribution model. In addition to collection and integration of existing information about volcanic products, this project will focus on filling the information gaps about unique physico-chemical characteristics of very fine (\u003c3 micrometer) volcanic particles (cryptotephra) that are present in Antarctic ice cores. This component of research will involve improving analytical methodology for detecting cryptotephra layers in ice, and will train a new generation of scientists to apply an array of modern state?of?the-art instrumentation available to the project team. The recognized importance of tephra in establishing a chronological framework for volcanic and sedimentary successions has already resulted in the development of robust regional tephrochronological frameworks (e.g. Europe, Kamchatka, New Zealand, Western North America). The AntT project will provide this framework for Antarctic tephrochronology, as needed for precise correlation records between Antarctic ice cores (e.g. WAIS Divide, RICE, ITASE) and global paleoclimate archives. The results of AntT will be of particular significance to climatologists, paleoclimatologists, atmospheric chemists, geochemists, climate modelers, solar-terrestrial physicists, environmental statisticians, and policy makers for designing solutions to mitigate or cope with likely future impacts of climate change events on modern society.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "is_usap_dc": true, "keywords": "NOT APPLICABLE", "locations": null, "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "paleo_time": null, "persons": "Hartman, Laura; Wheatley, Sarah D.; Kurbatov, Andrei V.", "platforms": "OTHER \u003e NOT APPLICABLE \u003e NOT APPLICABLE", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Collaborative Research: Developing an Antarctic Tephra Database for Interdisciplinary Paleoclimate Research (AntT)", "uid": "p0000328", "west": -180.0}, {"awards": "1142122 Miller, Nathan", "bounds_geometry": "POLYGON((166.163 -76.665,166.2635 -76.665,166.364 -76.665,166.4645 -76.665,166.565 -76.665,166.6655 -76.665,166.766 -76.665,166.8665 -76.665,166.967 -76.665,167.0675 -76.665,167.168 -76.665,167.168 -76.782,167.168 -76.899,167.168 -77.016,167.168 -77.133,167.168 -77.25,167.168 -77.367,167.168 -77.484,167.168 -77.601,167.168 -77.718,167.168 -77.835,167.0675 -77.835,166.967 -77.835,166.8665 -77.835,166.766 -77.835,166.6655 -77.835,166.565 -77.835,166.4645 -77.835,166.364 -77.835,166.2635 -77.835,166.163 -77.835,166.163 -77.718,166.163 -77.601,166.163 -77.484,166.163 -77.367,166.163 -77.25,166.163 -77.133,166.163 -77.016,166.163 -76.899,166.163 -76.782,166.163 -76.665))", "dataset_titles": "Antarctic emerald rockcod have the capacity to compensate for warming when uncoupled from CO2-acidification; Physiological and biochemical measurements on Antarctic dragonfish (Gymnodraco acuticeps) from McMurdo Sound; Physiological and biochemical measurements on juvenile Antarctic rockcod (Trematomus bernacchii) from McMurdo Sound; Thermal windows and metabolic performance curves in a developing Antarctic fish", "datasets": [{"dataset_uid": "601025", "doi": "10.15784/601025", "keywords": "Antarctica; Biota; Fish; McMurdo Sound; Oceans; Ross Sea; Southern Ocean", "people": "Miller, Nathan; Todgham, Anne; Davis, Brittany; Flynn, Erin", "repository": "USAP-DC", "science_program": null, "title": "Physiological and biochemical measurements on juvenile Antarctic rockcod (Trematomus bernacchii) from McMurdo Sound", "url": "https://www.usap-dc.org/view/dataset/601025"}, {"dataset_uid": "601040", "doi": "10.15784/601040", "keywords": "Antarctica; Biota; Fish; McMurdo Sound; Oceans; Ross Sea; Sample/collection Description; Sample/Collection Description; Southern Ocean", "people": "Miller, Nathan; Todgham, Anne", "repository": "USAP-DC", "science_program": null, "title": "Thermal windows and metabolic performance curves in a developing Antarctic fish", "url": "https://www.usap-dc.org/view/dataset/601040"}, {"dataset_uid": "601039", "doi": "10.15784/601039", "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; CTD Data; Fish; McMurdo Sound; Ocean Acidification; Oceans; Physical Oceanography; Ross Sea; Southern Ocean", "people": "Miller, Nathan; Todgham, Anne", "repository": "USAP-DC", "science_program": null, "title": "Antarctic emerald rockcod have the capacity to compensate for warming when uncoupled from CO2-acidification", "url": "https://www.usap-dc.org/view/dataset/601039"}, {"dataset_uid": "601026", "doi": "10.15784/601026", "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; CTD Data; Fish; McMurdo Sound; Ocean Acidification; Oceans; Physical Oceanography; Ross Sea; Southern Ocean", "people": "Davis, Brittany; Flynn, Erin; Miller, Nathan; Todgham, Anne", "repository": "USAP-DC", "science_program": null, "title": "Physiological and biochemical measurements on Antarctic dragonfish (Gymnodraco acuticeps) from McMurdo Sound", "url": "https://www.usap-dc.org/view/dataset/601026"}], "date_created": "Tue, 15 Aug 2017 00:00:00 GMT", "description": "Ocean acidification and increased temperatures are projected to be the primary impacts of global climate change on polar marine ecosystems over the next century. While recent research has focused on the effects of these drivers on calcifying organisms, less is known about how these changes may affect vertebrates. This research will focus on two Antarctic fishes, Trematomus bernacchii and Pagothenia borchgrevinki. Fish eggs and larvae will be collected in McMurdo Sound and reared under different temperature and pH regimes. Modern techniques will be used to examine subsequent changes in physiology, growth, development and gene expression over both short and long timescales. The results will fill a missing gap in our knowledge about the response of non-calcifying organisms to projected changes in pH and temperature. Results will be widely disseminated through publications as well as through presentations at national and international meetings; raw data will also be made available through open-access, web-based databases. This project will support the research and training of three graduate and three undergraduate students. As well, this project will foster the development of two modules on climate change and ocean acidification for an Introduction to Biology course.", "east": 167.168, "geometry": "POINT(166.6655 -77.25)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -76.665, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Miller, Nathan; Todgham, Anne", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.835, "title": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes", "uid": "p0000411", "west": 166.163}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": "POINT(149 -80)", "dataset_titles": "1970s - 1980s Kooyman-Billups TDR Dive Records from Weddell Seals in McMurdo Sound; Cortisol levels in Weddell seal fur; Seasonal Dive Data ; Specimen logs and observations from Weddell Seal colonies in Erebus Bay, 2013-2017; Weddell Seal Heat Flux Dataset; Weddell seal iron dynamics and oxygen stores across lactation; Weddell seal metabolic hormone data; Weddell Seal Molt Phenology Dataset; Weddell Seal Molt Survey Data; Weddell seal summer diving behavior", "datasets": [{"dataset_uid": "601560", "doi": "10.15784/601560", "keywords": "Antarctica; Biota; Diving Behavior; McMurdo Sound; Weddell Seal", "people": "Tsai, EmmaLi", "repository": "USAP-DC", "science_program": null, "title": "1970s - 1980s Kooyman-Billups TDR Dive Records from Weddell Seals in McMurdo Sound", "url": "https://www.usap-dc.org/view/dataset/601560"}, {"dataset_uid": "601587", "doi": "10.15784/601587", "keywords": "Aerobic; Antarctica; Dive Capacity; Iron; McMurdo Sound; Weddell Seal", "people": "Shero, Michelle", "repository": "USAP-DC", "science_program": null, "title": "Weddell seal iron dynamics and oxygen stores across lactation", "url": "https://www.usap-dc.org/view/dataset/601587"}, {"dataset_uid": "601840", "doi": "10.15784/601840", "keywords": "Antarctica; Cryosphere; Hormones; McMurdo Sound; Ross Sea; Weddell Seal", "people": "Kirkham, Amy", "repository": "USAP-DC", "science_program": null, "title": "Weddell seal metabolic hormone data", "url": "https://www.usap-dc.org/view/dataset/601840"}, {"dataset_uid": "601338", "doi": "10.15784/601338", "keywords": "Animal Behavior Observation; Antarctica; Biota; McMurdo Sound; Ross Sea; Seal Dive Data; Weddell Seal", "people": "Burns, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Seasonal Dive Data ", "url": "https://www.usap-dc.org/view/dataset/601338"}, {"dataset_uid": "601027", "doi": "10.15784/601027", "keywords": "Antarctica; Biota; McMurdo Sound; Oceans; Ross Sea; Sample/collection Description; Sample/Collection Description; Seals", "people": "Burns, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Specimen logs and observations from Weddell Seal colonies in Erebus Bay, 2013-2017", "url": "https://www.usap-dc.org/view/dataset/601027"}, {"dataset_uid": "601271", "doi": "10.15784/601271", "keywords": "Antarctica; Heat Flux; Infrared Thermography; Physiological Conditions; Surface Temperatures; Thermoregulation; Weddell Seal", "people": "Walcott, Skyla", "repository": "USAP-DC", "science_program": null, "title": "Weddell Seal Heat Flux Dataset", "url": "https://www.usap-dc.org/view/dataset/601271"}, {"dataset_uid": "601131", "doi": "10.15784/601131", "keywords": "Antarctica; B-292-M; Biota; Ross Sea; Seals; Southern Ocean; Weddell Seal", "people": "Burns, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Weddell Seal Molt Phenology Dataset", "url": "https://www.usap-dc.org/view/dataset/601131"}, {"dataset_uid": "601137", "doi": "10.15784/601137", "keywords": "Antarctica; Biota; Ross Sea; Seals; Southern Ocean; Weddell Seal", "people": "Beltran, Roxanne; Burns, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Weddell seal summer diving behavior", "url": "https://www.usap-dc.org/view/dataset/601137"}, {"dataset_uid": "601134", "doi": "10.15784/601134", "keywords": "Antarctica; Biota; Cortisol; Fur; Ross Sea; Seals; Southern Ocean; Visual Observations; Weddell Seal", "people": "Burns, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Cortisol levels in Weddell seal fur", "url": "https://www.usap-dc.org/view/dataset/601134"}, {"dataset_uid": "601133", "doi": "10.15784/601133", "keywords": "Antarctica; Biota; Ross Sea; Seals; Visual Observations; Weddell Seal", "people": "Burns, Jennifer", "repository": "USAP-DC", "science_program": null, "title": "Weddell Seal Molt Survey Data", "url": "https://www.usap-dc.org/view/dataset/601133"}], "date_created": "Wed, 24 May 2017 00:00:00 GMT", "description": "Marine mammals that inhabit high latitude environments have evolved unique mechanisms to execute a suite of energetically-costly life history events (CLHEs) within a relatively short timeframe when conditions are most favorable. Understanding the intrinsic and extrinsic factors that regulate CLHEs is particularly important in species such as Weddell seals, as both reproduction and molt are associated with large reductions in foraging effort, and the timing and outcome of each appears linked with the other. The long-term mark recapture program on Erebus Bay\u0027s Weddell seals provides a unique opportunity to examine CLHEs in a known-history population. The proposed work will monitor physiological condition, pregnancy status, and behavior at various times throughout the year to determine if molt timing is influenced by prior reproductive outcome, and if it, in turn, influences future reproductive success. These data will then be used to address the demographic consequences of trade-offs between CLHEs in Weddell seals. The impact of environmental conditions and CLHE timing on population health will also be modeled so that results can be extended to other climates and species. An improved understanding of the interactions between CLHEs and the environment is important in predicting the response of organisms from higher trophic levels to climate change. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. This project will support the research and training of graduate students and a post-doctoral researcher and will further foster an extensive public outreach collaboration.", "east": 165.0, "geometry": "POINT(165 -77)", "instruments": null, "is_usap_dc": true, "keywords": "FIELD INVESTIGATION; USAP-DC; Seal Dive Data; Weddell Seal", "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Burns, Jennifer", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD INVESTIGATION", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "uid": "p0000229", "west": 165.0}, {"awards": "1141978 Foreman, Christine", "bounds_geometry": "POLYGON((160 -76,160.1 -76,160.2 -76,160.3 -76,160.4 -76,160.5 -76,160.6 -76,160.7 -76,160.8 -76,160.9 -76,161 -76,161 -76.1,161 -76.2,161 -76.3,161 -76.4,161 -76.5,161 -76.6,161 -76.7,161 -76.8,161 -76.9,161 -77,160.9 -77,160.8 -77,160.7 -77,160.6 -77,160.5 -77,160.4 -77,160.3 -77,160.2 -77,160.1 -77,160 -77,160 -76.9,160 -76.8,160 -76.7,160 -76.6,160 -76.5,160 -76.4,160 -76.3,160 -76.2,160 -76.1,160 -76))", "dataset_titles": "FT-ICR MS Metadata; Respiration Metadata; UPLC-Q-TOF data of Cotton Glacier exometabolites", "datasets": [{"dataset_uid": "601089", "doi": "10.15784/601089", "keywords": "Antarctica; Biota; Exometabolites; Mass Spectrometry; Microbes; Microbiology", "people": "Foreman, Christine; Tigges, Michelle; Bothner, Brian", "repository": "USAP-DC", "science_program": null, "title": "UPLC-Q-TOF data of Cotton Glacier exometabolites", "url": "https://www.usap-dc.org/view/dataset/601089"}, {"dataset_uid": "601077", "doi": "10.15784/601077", "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; Fluorescence Spectroscopy; Mass Spectrometry", "people": "Foreman, Christine; D\u0027Andrilli, Juliana", "repository": "USAP-DC", "science_program": null, "title": "FT-ICR MS Metadata", "url": "https://www.usap-dc.org/view/dataset/601077"}, {"dataset_uid": "601076", "doi": "10.15784/601076", "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; Fluorescence Spectroscopy; Mass Spectrometry", "people": "Foreman, Christine; Smith, Heidi", "repository": "USAP-DC", "science_program": null, "title": "Respiration Metadata", "url": "https://www.usap-dc.org/view/dataset/601076"}], "date_created": "Tue, 25 Apr 2017 00:00:00 GMT", "description": "Uncovering the dynamics of dissolved organic matter (DOM) is central to an understanding of the global carbon cycle, as organic material from lakes, streams, oceans and soils passes through this pool. DOM acts as a key energy source for microbes in many ecosystems and therefore can affect regional nutrient cycling patterns. For example, preliminary results suggest that organisms isolated from a supraglacial stream on Cotton Glacier, Antarctica, may be important in DOM cycling in this relatively simple, low temperature system. However, little is known about the functional attributes of the microbes that interact with DOM in the environment. This project will use state-of-the-art genomics, proteomics and metabolomics approaches to understand the mechanisms by which two microbial isolates, CG3 and CG9_1, affect DOM cycling. Liquid chromatography-mass spectrometry will also be used to better characterize the microbially-derived DOM from this ecosystem. This project will support the research and training of one undergraduate and two graduate students. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. Understanding the relationship between cold-adapted microbial metabolisms and DOM pools is important as more than 90% of the Earth?s oceans are below 5 degrees Celsius.", "east": 161.0, "geometry": "POINT(160.5 -76.5)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -76.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Foreman, Christine; Bothner, Brian", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica", "uid": "p0000408", "west": 160.0}, {"awards": "0539578 Alley, Richard; 0539232 Cuffey, Kurt", "bounds_geometry": "POINT(112.083 -79.467)", "dataset_titles": "Grain Size Full Population Dataset from WDC06A Core; Temperature Profile of the West Antarctic Ice Sheet Divide Deep Borehole; Temperature Reconstruction at the West Antarctic Ice Sheet Divide; Updated (2017) bubble number-density, size, shape, and modeled paleoclimate data; WAIS Divide Ice Core Vertical Thin Section Low-resolution Digital Imagery; WAIS Divide Surface and Snow-pit Data, 2009-2013; WDC 06A Mean Grain Size Data", "datasets": [{"dataset_uid": "609654", "doi": "10.7265/N5GM858X", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Photo/video; Photo/Video; Thin Sections; WAIS Divide; WAIS Divide Ice Core", "people": "Cravens, Eric D.", "repository": "USAP-DC", "science_program": "WAIS Divide Ice Core", "title": "WAIS Divide Ice Core Vertical Thin Section Low-resolution Digital Imagery", "url": "https://www.usap-dc.org/view/dataset/609654"}, {"dataset_uid": "609655", "doi": "10.7265/N5VX0DG0", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Grain Size; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "people": "Cravens, Eric D.; Fitzpatrick, Joan", "repository": "USAP-DC", "science_program": null, "title": "Grain Size Full Population Dataset from WDC06A Core", "url": "https://www.usap-dc.org/view/dataset/609655"}, {"dataset_uid": "601079", "doi": "10.15784/601079", "keywords": "Antarctica; Atmosphere; AWS; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Meteorology; Physical Properties; Snow Pit; Temperature; WAIS Divide; WAIS Divide Ice Core; Weatherstation", "people": "Fegyveresi, John; Alley, Richard", "repository": "USAP-DC", "science_program": "WAIS Divide Ice Core", "title": "WAIS Divide Surface and Snow-pit Data, 2009-2013", "url": "https://www.usap-dc.org/view/dataset/601079"}, {"dataset_uid": "609656", "doi": "10.7265/N5MC8X08", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Grain Size; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "people": "Fitzpatrick, Joan; Cravens, Eric D.", "repository": "USAP-DC", "science_program": null, "title": "WDC 06A Mean Grain Size Data", "url": "https://www.usap-dc.org/view/dataset/609656"}, {"dataset_uid": "609550", "doi": "10.7265/N5V69GJW", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Temperature; WAIS Divide; WAIS Divide Ice Core", "people": "Cuffey, Kurt M.; Clow, Gary D.", "repository": "USAP-DC", "science_program": null, "title": "Temperature Profile of the West Antarctic Ice Sheet Divide Deep Borehole", "url": "https://www.usap-dc.org/view/dataset/609550"}, {"dataset_uid": "600377", "doi": "10.15784/600377", "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Nitrogen; Paleoclimate; Temperature; WAIS Divide; WAIS Divide Ice Core", "people": "Cuffey, Kurt M.", "repository": "USAP-DC", "science_program": "WAIS Divide Ice Core", "title": "Temperature Reconstruction at the West Antarctic Ice Sheet Divide", "url": "https://www.usap-dc.org/view/dataset/600377"}, {"dataset_uid": "601224", "doi": "10.15784/601224", "keywords": "Antarctic; Antarctica; Bubble Number Density; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Records; NSF-ICF Microtome and Photography Stage; Paleoclimate; Physical Properties; Snow/ice; Snow/Ice; WAIS Divide Ice Core; West Antarctic Ice Sheet", "people": "Voigt, Donald E.; Fitzpatrick, Joan; Spencer, Matthew; Alley, Richard; Fegyveresi, John", "repository": "USAP-DC", "science_program": "WAIS Divide Ice Core", "title": "Updated (2017) bubble number-density, size, shape, and modeled paleoclimate data", "url": "https://www.usap-dc.org/view/dataset/601224"}], "date_created": "Thu, 12 Jan 2017 00:00:00 GMT", "description": "0539578\u003cbr/\u003eAlley \u003cbr/\u003eThis award supports a five-year collaborative project to study the physical-properties of the planned deep ice core and the temperature of the ice in the divide region of the West Antarctic Ice Sheet. The intellectual merit of the proposed research is to provide fundamental information on the state of the ice sheet, to validate the integrity of the climate record, to help reconstruct the climate record, and to understand the flow state and history of the ice sheet. This information will initially be supplied to other investigators and then to the public and to appropriate databases, and will be published in the refereed scientific literature. The objectives of the proposed research are to aid in dating of the core through counting of annual layers, to identify any exceptionally warm intervals in the past through counting of melt layers, to learn as much as possible about the flow state and history of the ice through measurement of size, shape and arrangements of bubbles, clathrate inclusions, grains and their c-axes, to identify any flow disturbances through these indicators, and to learn the history of snow accumulation and temperature from analyses of bubbles and borehole temperatures combined with flow modeling and use of data from other collaborators. These results will then be synthesized and communicated. Failure to examine cores can lead to erroneous identification of flow features as climate changes, so careful examination is required. Independent reconstruction of accumulation rate provides important data on climate change, and improves confidence in interpretation of other climate indicators. Borehole temperatures are useful recorders of temperature history. Flow state and history are important in understanding climate history and potential contribution of ice to sea-level change. By contributing to all of these and additional issues, the proposed research will be of considerable value. The broader impacts of the research include making available to the public improved knowledge on societally central questions involving abrupt climate change and sea-level rise. The project will also contribute to the education of advanced students, will utilize results in education of introductory students, and will make vigorous efforts in outreach, informal science education, and supplying information to policy-makers as requested, thus contributing to a more-informed society.", "east": 112.083, "geometry": "POINT(112.083 -79.467)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PHOTON/OPTICAL DETECTORS \u003e CAMERAS \u003e CAMERA; IN SITU/LABORATORY INSTRUMENTS \u003e TEMPERATURE/HUMIDITY SENSORS \u003e THERMISTORS \u003e THERMISTORS", "is_usap_dc": true, "keywords": "LABORATORY; WAIS Divide; Ice Core; Temperature Profiles; FIELD SURVEYS; Bubble Number Density; GROUND-BASED OBSERVATIONS; Wais Divide-project", "locations": "WAIS Divide", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "paleo_time": null, "persons": "Fitzpatrick, Joan; Alley, Richard; Fegyveresi, John; Clow, Gary D.; Cuffey, Kurt M.; Cravens, Eric D.", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e GROUND-BASED OBSERVATIONS; OTHER \u003e PHYSICAL MODELS \u003e LABORATORY", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "uid": "p0000038", "west": 112.083}, {"awards": "1246320 Kruckenberg, Seth", "bounds_geometry": "POINT(-144.75 -76.53)", "dataset_titles": null, "datasets": null, "date_created": "Mon, 19 Sep 2016 00:00:00 GMT", "description": "Intellectual Merit: The PI proposes an investigation of mantle xenoliths entrained within a suite of ~1.4 Ma mafic volcanic centers in the Fosdick Mountains, Antarctica. These recently entrained mantle xenoliths offer a unique opportunity to characterize the West Antarctic lithospheric mantle that has been subject to active modification from Cretaceous to Present by plate-boundary processes, such as orthogonal to oblique plate convergence, intracontinental rifting, continental breakup, and Neogene volcanism. These volcanic centers derive from heterogeneous mantle sources and host a compositionally diverse suite of mantle xenoliths that have varied mineral assemblages and microstructures. The proposed research has two complementary goals: to assess structural and compositional heterogeneity within the upper mantle and the variability of intrinsic and extrinsic variables at a variety of lithospheric levels; and to use textural and compositional characterization of the xenolith suite to elucidate possible causes of heterogeneous seismic anisotropy within the Marie Byrd Land mantle lithosphere and inform competing hypotheses explaining the active volcanism, thermal anomaly, and slow seismic velocities beneath West Antarctica. Furthermore, characterization of samples of the mantle beneath West Antarctica provides a type of \u0027ground truth\u0027 in support of contemporary ANET/POLENET seismology research that seeks to determine mantle composition, temperature, and sources of seismic anisotropy. Broader impacts: The PI is in his first-year as a tenure track faculty member at Boston College. A postdoctoral researcher will be trained in EBSD techniques, interdisciplinary polar research, and the mentoring of undergraduate investigators. Two Boston College undergraduates will participate in the research and a priority will be placed on selecting underrepresented minorities and first-generation college students. An existing sample suite assembled over more than 20 years of NSF sponsored field work, will be used. The PI will create a digital database for microstructural, textural, and xenolith data for rapid dissemination to the international Antarctic community.", "east": -144.75, "geometry": "POINT(-144.75 -76.53)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -76.53, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Kruckenberg, Seth", "platforms": "Not provided", "repositories": null, "science_programs": null, "south": -76.53, "title": "Integrated Evaluation of Mantle Xenoliths from the Fosdick Mountains, Antarctica", "uid": "p0000400", "west": -144.75}, {"awards": "1141877 Aronson, Richard", "bounds_geometry": "POLYGON((-111.18 -49.98,-105.429 -49.98,-99.678 -49.98,-93.927 -49.98,-88.176 -49.98,-82.425 -49.98,-76.674 -49.98,-70.923 -49.98,-65.172 -49.98,-59.421 -49.98,-53.67 -49.98,-53.67 -52.826,-53.67 -55.672,-53.67 -58.518,-53.67 -61.364,-53.67 -64.21,-53.67 -67.056,-53.67 -69.902,-53.67 -72.748,-53.67 -75.594,-53.67 -78.44,-59.421 -78.44,-65.172 -78.44,-70.923 -78.44,-76.674 -78.44,-82.425 -78.44,-88.176 -78.44,-93.927 -78.44,-99.678 -78.44,-105.429 -78.44,-111.18 -78.44,-111.18 -75.594,-111.18 -72.748,-111.18 -69.902,-111.18 -67.056,-111.18 -64.21,-111.18 -61.364,-111.18 -58.518,-111.18 -55.672,-111.18 -52.826,-111.18 -49.98))", "dataset_titles": "Climate Change and Predatory Invasion of the Antarctic Benthos; Expedition Data; Material properties of the exoskeleton of Paralomis birsteini", "datasets": [{"dataset_uid": "601109", "doi": "10.15784/601109", "keywords": "Antarctica; Biota; Callinectes; Exoskeleton; Fish; Glaciers/ice Sheet; Glaciers/Ice Sheet; Paralomis", "people": "Steffel, Brittan", "repository": "USAP-DC", "science_program": null, "title": "Material properties of the exoskeleton of Paralomis birsteini", "url": "https://www.usap-dc.org/view/dataset/601109"}, {"dataset_uid": "600385", "doi": "10.15784/600385", "keywords": "Antarctica; Antarctic Peninsula; Anvers Island; Benthos; Biota; Camera Tow; LMG1502; Marguerite Bay; NBP1002; NBP1310; Oceans; Photo/video; Photo/Video; Sample/collection Description; Sample/Collection Description; Southern Ocean", "people": "Aronson, Richard", "repository": "USAP-DC", "science_program": null, "title": "Climate Change and Predatory Invasion of the Antarctic Benthos", "url": "https://www.usap-dc.org/view/dataset/600385"}, {"dataset_uid": "001417", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP1310"}, {"dataset_uid": "600171", "doi": "10.15784/600171", "keywords": "Antarctica; Antarctic Peninsula; Anvers Island; Benthos; Biota; Camera Tow; LMG1502; Marguerite Bay; NBP1002; NBP1310; Oceans; Photo/video; Photo/Video; Sample/collection Description; Sample/Collection Description; Southern Ocean", "people": "Aronson, Richard", "repository": "USAP-DC", "science_program": null, "title": "Climate Change and Predatory Invasion of the Antarctic Benthos", "url": "https://www.usap-dc.org/view/dataset/600171"}], "date_created": "Wed, 14 Sep 2016 00:00:00 GMT", "description": "Elevated temperatures and ocean acidification are both threatening the Southern Ocean. The effects of these environmental changes are poorly understood, but preliminary data suggest that they are driving a biological invasion. Specifically, large populations of skeleton-crushing king crabs, Paralomis birsteini, have been detected off Marguerite Bay on the West Antarctic Peninsula. These crabs appear to be invading the continental shelf region where benthic communities have evolved in the absence of such top-predators. Thus, this invasion could result in a wholesale restructuring of the Antarctic benthic ecosystem. The proposed work seeks to document this invasion and better understand the effects of the introduction of P. birsteini on the ecology of this region. A towed underwater vehicle will be used to photographically image communities, and communities with and without P. birsteini will be compared quantitatively. Additionally, crabs will trapped and various aspects of their morphology and physiology will be assessed. This research is unique in that it will document a biological invasion in real-time and it will therefore enhance our general understandings of the drivers of invasion and resilience in biological communities. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. This project will support the research and training of undergraduate and graduate students and will foster an international collaboration with British scientists. Researchers on this project will participate in outreach thorough the development of K-12 curricular materials.", "east": -53.67, "geometry": "POINT(-82.425 -64.21)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e CTD; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e FLUOROMETERS; IN SITU/LABORATORY INSTRUMENTS \u003e RECORDERS/LOGGERS \u003e AWS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e GPS \u003e GPS; EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e ECHO SOUNDERS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e MBES; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e THERMOSALINOGRAPHS", "is_usap_dc": true, "keywords": "R/V NBP; Not provided", "locations": null, "north": -49.98, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Aronson, Richard", "platforms": "Not provided; WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "USAP-DC", "repositories": "R2R; USAP-DC", "science_programs": null, "south": -78.44, "title": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos", "uid": "p0000303", "west": -111.18}, {"awards": "1141326 Rotella, Jay", "bounds_geometry": "POLYGON((163.1 -70.3,163.59 -70.3,164.08 -70.3,164.57 -70.3,165.06 -70.3,165.55 -70.3,166.04 -70.3,166.53 -70.3,167.02 -70.3,167.51 -70.3,168 -70.3,168 -70.98,168 -71.66,168 -72.34,168 -73.02,168 -73.7,168 -74.38,168 -75.06,168 -75.74,168 -76.42,168 -77.1,167.51 -77.1,167.02 -77.1,166.53 -77.1,166.04 -77.1,165.55 -77.1,165.06 -77.1,164.57 -77.1,164.08 -77.1,163.59 -77.1,163.1 -77.1,163.1 -76.42,163.1 -75.74,163.1 -75.06,163.1 -74.38,163.1 -73.7,163.1 -73.02,163.1 -72.34,163.1 -71.66,163.1 -70.98,163.1 -70.3))", "dataset_titles": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2017 Antarctic field season", "datasets": [{"dataset_uid": "601125", "doi": "10.15784/601125", "keywords": "Antarctica; Biota; Sea Ice", "people": "Rotella, Jay", "repository": "USAP-DC", "science_program": null, "title": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2017 Antarctic field season", "url": "https://www.usap-dc.org/view/dataset/601125"}], "date_created": "Mon, 08 Feb 2016 00:00:00 GMT", "description": "Abstract The Erebus Bay population of Weddell seals in Antarctica?s Ross Sea is the most southerly breeding population of mammal in the world, closely associated with persistent shore-fast ice, and one that has been intensively studied since 1968. The resulting long-term database, which includes data for 20,586 marked individuals, contains detailed population information that provides an excellent opportunity to study linkages between environmental conditions and demographic processes in the Antarctic. The population?s location is of special interest as the Ross Sea is one of the most productive areas of the Southern Ocean, one of the few pristine marine environments remaining on the planet, and, in contrast to the Antarctic Peninsula and Arctic, is undergoing a gradual lengthening of the sea-ice season. The work to be continued here capitalizes on (1) long-term data for individual seals and their polar environment; (2) experience collecting and analyzing data from the extensive study population; and (3) recent statistical advances in hierarchical modeling that allow for rigorous treatment of individual heterogeneity (in mark-recapture and body mass data) and inclusion of diverse covariates hypothesized to explain variation in fitness components. Covariates to be considered include traits of individuals and their mothers and environmental conditions throughout life. The study will continue to (1) provide detailed data on known-age individuals to other science projects and (2) educate and mentor the next generation of ecologists through academic and professional training and research experiences.", "east": 168.0, "geometry": "POINT(165.55 -73.7)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -70.3, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Rotella, Jay; Garrott, Robert", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.1, "title": "The Demographic Consequences of Environmental Variability and Individual Heterogeneity in Life-history Tactics of a Long-lived Antarctic Marine Predator", "uid": "p0000299", "west": 163.1}, {"awards": "1142018 Arrigo, Kevin", "bounds_geometry": "POLYGON((-75.8 -61.08,-74.457 -61.08,-73.114 -61.08,-71.771 -61.08,-70.428 -61.08,-69.085 -61.08,-67.742 -61.08,-66.399 -61.08,-65.056 -61.08,-63.713 -61.08,-62.37 -61.08,-62.37 -61.684,-62.37 -62.288,-62.37 -62.892,-62.37 -63.496,-62.37 -64.1,-62.37 -64.704,-62.37 -65.308,-62.37 -65.912,-62.37 -66.516,-62.37 -67.12,-63.713 -67.12,-65.056 -67.12,-66.399 -67.12,-67.742 -67.12,-69.085 -67.12,-70.428 -67.12,-71.771 -67.12,-73.114 -67.12,-74.457 -67.12,-75.8 -67.12,-75.8 -66.516,-75.8 -65.912,-75.8 -65.308,-75.8 -64.704,-75.8 -64.1,-75.8 -63.496,-75.8 -62.892,-75.8 -62.288,-75.8 -61.684,-75.8 -61.08))", "dataset_titles": "Adaptive Responses of Phaeocystis Populations in Antarctic Ecosystems; Expedition Data", "datasets": [{"dataset_uid": "001417", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP1310"}, {"dataset_uid": "600161", "doi": "10.15784/600161", "keywords": "Antarctica; Antarctic Peninsula; Biota; Chlorophyll; CTD Data; NBP1310; NBP1409; Oceans; Physical Oceanography; Phytoplankton; Sea Surface; Southern Ocean", "people": "Arrigo, Kevin", "repository": "USAP-DC", "science_program": null, "title": "Adaptive Responses of Phaeocystis Populations in Antarctic Ecosystems", "url": "https://www.usap-dc.org/view/dataset/600161"}], "date_created": "Mon, 11 Jan 2016 00:00:00 GMT", "description": "Global climate change is having significant effects on areas of the Southern Ocean, and a better understanding of this ecosystem will permit predictions about the large-scale implications of these shifts. The haptophyte Phaeocystis antarctica is an important component of the phytoplankton communities in this region, but little is known about the factors controlling its distribution. Preliminary data suggest that P. antarctica posses unique adaptations that allow it to thrive in regions with dynamic light regimes. This research will extend these results to identify the physiological and genetic mechanisms that affect the growth and distribution of P. antarctica. This work will use field and laboratory-based studies and a suite of modern molecular techniques to better understand the biogeography and physiology of this key organism. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. This project will support the research and training of two graduate students and will foster an established international collaboration with Dutch scientists. Researchers on this project will participate in outreach programs targeting K12 teachers as well as high school students.", "east": -62.37, "geometry": "POINT(-69.085 -64.1)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e CTD; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e FLUOROMETERS; IN SITU/LABORATORY INSTRUMENTS \u003e RECORDERS/LOGGERS \u003e AWS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e GPS \u003e GPS; EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e ECHO SOUNDERS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e MBES; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e THERMOSALINOGRAPHS", "is_usap_dc": true, "keywords": "R/V NBP; Not provided", "locations": null, "north": -61.08, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Arrigo, Kevin", "platforms": "Not provided; WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "R2R", "repositories": "R2R; USAP-DC", "science_programs": null, "south": -67.12, "title": "Collaborative Research: Adaptive Responses of Phaeocystis Populations in Antarctic Ecosystems", "uid": "p0000446", "west": -75.8}, {"awards": "1063592 Arrigo, Kevin", "bounds_geometry": "POLYGON((-75.8 -61.08,-74.457 -61.08,-73.114 -61.08,-71.771 -61.08,-70.428 -61.08,-69.085 -61.08,-67.742 -61.08,-66.399 -61.08,-65.056 -61.08,-63.713 -61.08,-62.37 -61.08,-62.37 -61.684,-62.37 -62.288,-62.37 -62.892,-62.37 -63.496,-62.37 -64.1,-62.37 -64.704,-62.37 -65.308,-62.37 -65.912,-62.37 -66.516,-62.37 -67.12,-63.713 -67.12,-65.056 -67.12,-66.399 -67.12,-67.742 -67.12,-69.085 -67.12,-70.428 -67.12,-71.771 -67.12,-73.114 -67.12,-74.457 -67.12,-75.8 -67.12,-75.8 -66.516,-75.8 -65.912,-75.8 -65.308,-75.8 -64.704,-75.8 -64.1,-75.8 -63.496,-75.8 -62.892,-75.8 -62.288,-75.8 -61.684,-75.8 -61.08))", "dataset_titles": null, "datasets": null, "date_created": "Mon, 11 Jan 2016 00:00:00 GMT", "description": "Phaeocystis antarctica is capable of forming blooms that are denser and more extensive than any other member of the Southern Ocean phytoplankton community. The factors that enable P Antarctica to dominate its competitors are not clear but are likely related to its colonial lifestyle. The goal of the project is to map all the reactions in metabolic pathways that are key to defining the ecological niche of Phaeocystis antarctica by developing a Pathway/Genome Database (PGDB) using Pathway Tools software. The investigators will assign proteins and enzymes to key pathways in P. Antarctica, continually improve and edit the database as the full Phaeocystis genome comes online, and host the database on the BioCyc webpage. The end product will be the first database for a eukaryotic phytoplankton genome where researchers can query extant metabolic pathways and place new proteins and enzymes of interest within metabolic networks. The risk is that a substantial percentage of catalytic enzymes may belong to pathways that are poorly characterized. The science impact is to link genomes to metabolic potential in the context of Phaeocystis life history but also in comparison to other organisms across the tree of life. The education and outreach includes work with a high school teacher and intern and curriculum development.", "east": -62.37, "geometry": "POINT(-69.085 -64.1)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -61.08, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Arrigo, Kevin", "platforms": "Not provided", "repositories": null, "science_programs": null, "south": -67.12, "title": "Application for an Early-concept Grant for Exploratory Reasearch (EAGER) to develop a Pathway/Genome Database (PGDB) for the Southern Ocean Haptophyte Phaeocystis Antarctica.", "uid": "p0000445", "west": -75.8}, {"awards": "1321782 Costa, Daniel", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets", "datasets": [{"dataset_uid": "600137", "doi": "10.15784/600137", "keywords": "Animal Tracking; Antarctica; Biota; Oceans; Sample/collection Description; Sample/Collection Description; Seals; Southern Ocean", "people": "Costa, Daniel", "repository": "USAP-DC", "science_program": null, "title": "Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets", "url": "https://www.usap-dc.org/view/dataset/600137"}], "date_created": "Wed, 03 Jun 2015 00:00:00 GMT", "description": "Identifying the basic habitat requirements of Antarctic predators is fundamental to understanding how they will respond to the human-induced challenges of commercial fisheries and climate change. This understanding can only be achieved if the underlying linkages to physical processes are related to animal movements. As part of the international Retrospective Analysis of Antarctic Tracking Data (RAATD) organized by the SCAR Expert Group of Birds and Marine Mammals, this research will collate and synthesize tracking data from crabeater seals, Lobodon carcinophagus, and Weddell seals, Leptonychotes weddelli. These data will be combined with all available data from the Southern Ocean that has been collected by researchers from Norway, United Kingdom, Germany, Australia and the USA. These data will be analyzed using a common analytical approach and synthesized into a synoptic view of these two species across the Southern Ocean. The diving and movement patterns will be examined for each species. As well, the total home range and core habitat utilization patterns for each species and region will be determined. This study will develop global habitat maps for each species based on physical and biological attributes of their \"hot-spots\" and then overlay all the species specific maps to identify multi-species areas of ecological significance. Broader impacts include support and training for a postdoctoral scholar, the production of a publicly available database and the participation in an international data synthesis effort.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Costa, Daniel", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets", "uid": "p0000346", "west": -180.0}, {"awards": "0944557 Marsh, Adam", "bounds_geometry": "POINT(166 78)", "dataset_titles": "Environmental Genomics of an Antarctic Polychaete #SRP040946", "datasets": [{"dataset_uid": "000223", "doi": "", "keywords": null, "people": null, "repository": "NCBI GenBank", "science_program": null, "title": "Environmental Genomics of an Antarctic Polychaete #SRP040946", "url": "https://www.ncbi.nlm.nih.gov/sra/?term=SRP040946"}], "date_created": "Tue, 13 Jan 2015 00:00:00 GMT", "description": "Genome-enabled biology provides a foundation for understanding the genetic basis of organism-environment interactions. . The research project links gene expression, genome methylation, and metabolic rates to assess the mechanisms of environmental adaptation (temperature) across multiple generations in a polar, and closely related temperate, polychaete. By comparing these two species, the research will assess how a polar environment shapes responses to environmental stress. This work will produce: 1) a database of full transcriptome (gene specific) profiling data for the polar polychaete cultured at two temperatures; 2) the contribution of genome methylation to the suppression of gene transcription activities; 3) the linkage between shifts in mRNA pools and total cellular activities (as ATP consumption via respiration); 4) an assessment of the inheritance of patterns of gene expression and metabolic activities across three generations; and 5) a simple demographic model of the polar polychaete population dynamics under normal and \u0027global-warming\u0027 temperature scenarios. Broader impacts include two outreach activities. The first is a mentoring program, where African-American undergraduate students spend 1.5 years working on a research project with a UD faculty member (2 summers plus their senior academic year). The second is a children\u0027s display activity at UD?s School of Marine Science \"Coast Day\".", "east": 166.0, "geometry": "POINT(166 -78)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -78.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Marsh, Adam G.", "platforms": "Not provided", "repo": "NCBI GenBank", "repositories": "NCBI GenBank", "science_programs": null, "south": -78.0, "title": "Environmental Genomics in an Antarctic polychaete", "uid": "p0000355", "west": 166.0}, {"awards": "0944489 Williams, Trevor", "bounds_geometry": "POLYGON((-55 -58,-33.2 -58,-11.4 -58,10.4 -58,32.2 -58,54 -58,75.8 -58,97.6 -58,119.4 -58,141.2 -58,163 -58,163 -60,163 -62,163 -64,163 -66,163 -68,163 -70,163 -72,163 -74,163 -76,163 -78,141.2 -78,119.4 -78,97.6 -78,75.8 -78,54 -78,32.2 -78,10.4 -78,-11.4 -78,-33.2 -78,-55 -78,-55 -76,-55 -74,-55 -72,-55 -70,-55 -68,-55 -66,-55 -64,-55 -62,-55 -60,-55 -58))", "dataset_titles": "History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris", "datasets": [{"dataset_uid": "600116", "doi": "10.15784/600116", "keywords": "Geochronology; George V Land; IODP U1356; IODP U1361; Marine Sediments; ODP1165; Prydz Bay; Solid Earth; Southern Ocean; Wilkes Land", "people": "Williams, Trevor; Hemming, Sidney R.", "repository": "USAP-DC", "science_program": null, "title": "History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris", "url": "https://www.usap-dc.org/view/dataset/600116"}], "date_created": "Wed, 13 Aug 2014 00:00:00 GMT", "description": "Intellectual Merit: \u003cbr/\u003eThe PIs propose to study the stability and dynamics of the East Antarctic ice sheet during the Pliocene in the area of the Wilkes and Aurora subglacial basins. Models indicate the ice sheet is most sensitive to warming in these low-lying areas. This study is important as there is very little direct evidence about which parts of the East Antarctic ice sheet became unstable under warm conditions. In a pilot study the PIs have shown that the isotopic geochemical signature of downcore ice-rafted debris (IRD) can be linked to continental source areas indicating which parts of the ice sheet reached the coast and calved IRD-bearing icebergs. Their initial results suggest rapid iceberg discharge from the Wilkes Land and Ad\u00e9lie Land coastal areas at times in the late Miocene and early Pliocene. In this study the PIs will analyze IRD from IODP sediment cores collected on the continental rise off East Antarctica. By analyzing 40Ar/39Ar ages of hornblende IRD grains, U-Pb ages of zircons, and Sm-Nd isotopes of the fine fraction of several IRD-rich layers for each core, they will be able to fingerprint continental source areas that will indicated ice extent and dynamics on East Antarctica. The PIs will also carry out detailed studies across a few of these layers to characterize the anatomy of the ice-rafting event and better understand the mechanism of ice destabilization.\u003cbr/\u003e\u003cbr/\u003eBroader impacts: \u003cbr/\u003eThe data collected will be important for scientists in a broad variety of fields. The project will involve one undergraduate student and one summer intern at LDEO, and a graduate student at Imperial College London. The project will expose to cutting edge methodologies as well as an international research team. Data from the project will be deposited in the online databases (SedDB) and all results and methods will be made available to the scientific community through publications in peer-reviewed journals and attendance at international conferences.", "east": 163.0, "geometry": "POINT(54 -68)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -58.0, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Williams, Trevor; Hemming, Sidney R.", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris", "uid": "p0000353", "west": -55.0}, {"awards": "1250208 Friedlaender, Ari", "bounds_geometry": "POLYGON((-80 -63,-78 -63,-76 -63,-74 -63,-72 -63,-70 -63,-68 -63,-66 -63,-64 -63,-62 -63,-60 -63,-60 -63.7,-60 -64.4,-60 -65.1,-60 -65.8,-60 -66.5,-60 -67.2,-60 -67.9,-60 -68.6,-60 -69.3,-60 -70,-62 -70,-64 -70,-66 -70,-68 -70,-70 -70,-72 -70,-74 -70,-76 -70,-78 -70,-80 -70,-80 -69.3,-80 -68.6,-80 -67.9,-80 -67.2,-80 -66.5,-80 -65.8,-80 -65.1,-80 -64.4,-80 -63.7,-80 -63))", "dataset_titles": "Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region", "datasets": [{"dataset_uid": "600151", "doi": "10.15784/600151", "keywords": "Antarctica; Antarctic Peninsula; Biota; Oceans; Sample/collection Description; Sample/Collection Description; Southern Ocean; Whales", "people": "Nowacek, Douglas; Johnston, David; Friedlaender, Ari", "repository": "USAP-DC", "science_program": null, "title": "Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region", "url": "https://www.usap-dc.org/view/dataset/600151"}], "date_created": "Mon, 10 Mar 2014 00:00:00 GMT", "description": "Whales play a central role in the ecology and biogeochemistry of the Southern Ocean. However, little is known regarding their distribution and behavior, in part because of challenges associated with studying these organisms from large research vessels. This research will take advantage of the unique opportunity presented by the 2012-2013 test run of the smaller, more mobile R/V Point Sur. This work will use the Point Sur to investigate humpback whales in the waters studied by the Palmer Long Term Ecological Research (LTER) Station off the Western Antarctic Peninsula (WAP). Employing a combination of long-term satellite-linked tags and short-term suction cup tags, researchers will investigate the distribution, abundance and foraging behaviors of whales in this region. Whale biogeography will then be related to quantitative surveys of krill, their primary food source. Hypotheses regarding whale distribution and foraging strategies as well as physical oceanographic features will be tested. The WAP is undergoing some of the most dramatic warming on the planet, and a better understanding of the ecology of top predators is central to developing an understanding of the impacts of this change. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. Finally, this work will be coordinated with the extensive infrastructure of the Palmer LTER site, enabling outreach and educational activities.", "east": -60.0, "geometry": "POINT(-70 -66.5)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Friedlaender, Ari; Nowacek, Douglas; Johnston, David", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LTER", "south": -70.0, "title": "RAPID: Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region", "uid": "p0000666", "west": -80.0}, {"awards": "0739515 Fagan, William", "bounds_geometry": "POLYGON((-68.383 -60.65,-66.10137 -60.65,-63.81974 -60.65,-61.53811 -60.65,-59.25648 -60.65,-56.97485 -60.65,-54.69322 -60.65,-52.41159 -60.65,-50.12996 -60.65,-47.84833 -60.65,-45.5667 -60.65,-45.5667 -61.4145,-45.5667 -62.179,-45.5667 -62.9435,-45.5667 -63.708,-45.5667 -64.4725,-45.5667 -65.237,-45.5667 -66.0015,-45.5667 -66.766,-45.5667 -67.5305,-45.5667 -68.295,-47.84833 -68.295,-50.12996 -68.295,-52.41159 -68.295,-54.69322 -68.295,-56.97485 -68.295,-59.25648 -68.295,-61.53811 -68.295,-63.81974 -68.295,-66.10137 -68.295,-68.383 -68.295,-68.383 -67.5305,-68.383 -66.766,-68.383 -66.0015,-68.383 -65.237,-68.383 -64.4725,-68.383 -63.708,-68.383 -62.9435,-68.383 -62.179,-68.383 -61.4145,-68.383 -60.65))", "dataset_titles": "Data Paper, ESA Ecology", "datasets": [{"dataset_uid": "000141", "doi": "", "keywords": null, "people": null, "repository": "Publication", "science_program": null, "title": "Data Paper, ESA Ecology", "url": "http://dx.doi.org/10.1890/13-1108.1"}], "date_created": "Fri, 17 Jan 2014 00:00:00 GMT", "description": "This five-year project seeks to characterize decadal scale changes in penguin and seabird populations on the Antarctic Peninsula, and to identify the factors driving these long-term changes. Two interconnected research activities are proposed: 1. Continued, long-term monitoring and censusing of penguin and seabird populations at \u003e117 sites throughout the Antarctic Peninsula via opportunistic ship-based data collection. 2. Synthesis and quantitative analyses of datasets detailing long-term changes in five penguin and seabird species from diverse sites throughout the Antarctic Peninsula. When complete, the penguin/seabird database will incorporate data from the Antarctic Site Inventory (ASI), the CCAMLR database, the US AMLR database, the LTER database from Palmer Station, data from British and Argentine researchers, historic census data compiled by the Scientific Committee on Antarctic Research (SCAR), and, when possible, additional privately held datasets. Additional data for temperature change, sea ice coverage, the seasonal timing and intensity of human visitation, and other factors have been gathered and will be analyzed together with population trajectories within a spatially explicit framework. The research will include hierarchical statistical analyses to characterize the long-term population dynamics of several key polar species across multiple spatial scales (sites, regions, and the Peninsula). Analyses also will focus on specific subsets of the overall database to contrast visitor impacts on paired colonies, sites, and regions that share similar environmental conditions but differ in the intensity of tourism. \u003cbr/\u003e\u003cbr/\u003eThe Broader Impacts include (1) research training and first-time Antarctic experiences for a postdoctoral researcher and several graduate students, all of whom will then be better positioned to bring their expertise in spatial and/or quantitative/theoretical ecology to bear on questions in polar research; (2) assembly and analysis of a large, multi-season database of penguin and seabird time series from the Antarctic Peninsula that will be publicly available, (3) assistance in distinguishing the impacts of tourism versus climate change on seabird populations. Under the Environmental Protocol to the Antarctic Treaty, Treaty Parties are charged with regular and effective monitoring to assess the impacts of human activities. This project will uniquely assist Parties in fulfilling this mandate.", "east": -45.5667, "geometry": "POINT(-56.97485 -64.4725)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -60.65, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Fagan, William; Lynch, Heather", "platforms": "Not provided", "repo": "Publication", "repositories": "Publication", "science_programs": null, "south": -68.295, "title": "Collaborative Research: Multispecies, Multiscale Investigations of Longterm Changes in Penguin and Seabird Populations on the Antarctic Peninsula", "uid": "p0000465", "west": -68.383}, {"awards": "1142083 Kyle, Philip", "bounds_geometry": "POINT(167.15334 -77.529724)", "dataset_titles": "Database of Erebus cave field seasons; Icequakes at Erebus volcano, Antarctica; Mount Erebus Observatory GPS data; Mount Erebus Seismic Data; Mount Erebus Thermodynamic model code; Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO); Seismic data used for high-resolution active-source seismic tomography", "datasets": [{"dataset_uid": "200032", "doi": "", "keywords": null, "people": null, "repository": "IRIS", "science_program": null, "title": "Mount Erebus Seismic Data", "url": "http://ds.iris.edu/mda/ER/"}, {"dataset_uid": "200030", "doi": "", "keywords": null, "people": null, "repository": "GitHub", "science_program": null, "title": "Database of Erebus cave field seasons", "url": "https://github.com/foobarbecue/troggle"}, {"dataset_uid": "200034", "doi": "", "keywords": null, "people": null, "repository": "IRIS", "science_program": null, "title": "Seismic data used for high-resolution active-source seismic tomography", "url": "http://ds.iris.edu/mda/ZW/?timewindow=2007-2009http://ds.iris.edu/mda/Y4?timewindow=2008-2009http://ds.iris.edu/ds/nodes/dmc/forms/assembled-data/?dataset_report_number=09-015"}, {"dataset_uid": "200031", "doi": "", "keywords": null, "people": null, "repository": "GitHub", "science_program": null, "title": "Mount Erebus Thermodynamic model code", "url": "https://github.com/kaylai/Iacovino2015_thermodynamic_model"}, {"dataset_uid": "600381", "doi": "10.15784/600381", "keywords": "Antarctica; Cable Observatory; Geology/Geophysics - Other; Infrared Imagery; Intracontinental Magmatism; IntraContinental Magmatism; MEVO; Mount Erebus; Photo/video; Photo/Video; Ross Island; Solid Earth; Thermal Camera; Volcano", "people": "Oppenheimer, Clive; Kyle, Philip", "repository": "USAP-DC", "science_program": "MEVO", "title": "Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)", "url": "https://www.usap-dc.org/view/dataset/600381"}, {"dataset_uid": "200027", "doi": "", "keywords": null, "people": null, "repository": "UNAVCO", "science_program": null, "title": "Mount Erebus Observatory GPS data", "url": "https://www.unavco.org/data/gps-gnss/data-access-methods/dai1/monument.php?mid=22083\u0026parent_link=Permanent\u0026pview=original"}, {"dataset_uid": "200033", "doi": "", "keywords": null, "people": null, "repository": "IRIS", "science_program": null, "title": "Icequakes at Erebus volcano, Antarctica", "url": "http://ds.iris.edu/mda/ZW/?timewindow=2007-2009http://ds.iris.edu/mda/Y4?timewindow=2008-2009http://ds.iris.edu/mda/ZO?timewindow=2011-2012"}], "date_created": "Tue, 03 Sep 2013 00:00:00 GMT", "description": "Intellectual Merit: Mt. Erebus is one of only a handful of volcanoes worldwide that have lava lakes with readily observable and nearly continuous Strombolian explosive activity. Erebus is also unique in having a permanent convecting lava lake of anorthoclase phonolite magma. Over the years significant infrastructure has been established at the summit of Mt. Erebus as part of the Mount Erebus Volcano Observatory (MEVO), which serves as a natural laboratory to study a wide range of volcanic processes, especially magma degassing associated with an open convecting magma conduit. The PI proposes to continue operating MEVO for a further five years. The fundamental fundamental research objectives are: to understand diffuse flank degassing by using distributed temperature sensing and gas measurements in ice caves, to understand conduit processes, and to examine the environmental impact of volcanic emissions from Erebus on atmospheric and cryospheric environments. To examine conduit processes the PI will make simultaneous observations with video records, thermal imaging, measurements of gas emission rates and gas compositions, seismic, and infrasound data. Broader impacts: An important aspect of Erebus research is the education and training of students. Both graduate and undergraduate students will have the opportunity to work on MEVO data and deploy to the field site. In addition, this proposal will support a middle or high school science teacher for two field seasons. The PI will also continue working with various media organizations and filmmakers.", "east": 167.15334, "geometry": "POINT(167.15334 -77.529724)", "instruments": "EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e IMAGING SPECTROMETERS/RADIOMETERS \u003e TIRS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e SPECTROMETERS \u003e FTIR SPECTROMETER; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e SPECTROMETERS \u003e DOAS; EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e LASER RANGING \u003e MOBLAS; IN SITU/LABORATORY INSTRUMENTS \u003e PROBES \u003e ELECTRON MICROPROBES; IN SITU/LABORATORY INSTRUMENTS \u003e PHOTON/OPTICAL DETECTORS \u003e PETROGRAPHIC MICROSCOPES; IN SITU/LABORATORY INSTRUMENTS \u003e MAGNETIC/MOTION SENSORS \u003e SEISMOMETERS \u003e SEISMOMETERS; NOT APPLICABLE \u003e NOT APPLICABLE \u003e NOT APPLICABLE; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e IMAGING SPECTROMETERS/RADIOMETERS \u003e HRDI; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e IMAGING SPECTROMETERS/RADIOMETERS \u003e TIRS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e INFRASONIC MICROPHONES; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e AMS; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e XRF; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e ICP-MS; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e ICP-ES; EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e LASER RANGING \u003e MOBLAS; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e IRGA; IN SITU/LABORATORY INSTRUMENTS \u003e PHOTON/OPTICAL DETECTORS \u003e SCANNING ELECTRON MICROSCOPES; IN SITU/LABORATORY INSTRUMENTS \u003e PRESSURE/HEIGHT METERS \u003e PRESSURE CHAMBERS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e SPECTROMETERS \u003e FTIR SPECTROMETER; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e PHOTON/OPTICAL DETECTORS \u003e MICROTOMOGRAPHY; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e SIMS; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e GAS CHROMATOGRAPHS", "is_usap_dc": true, "keywords": "Earthquakes; Vesuvius; Cosmogenic Radionuclides; Infrasonic Signals; Icequakes; Magma Shells; Phase Equilibria; Passcal; Correlation; Backscattering; Eruptive History; Degassing; Volatiles; Magma Convection; Thermodynamics; Tremors; Optech; Uv Doas; Energy Partitioning; Erebus; Cronus; Holocene; Lava Lake; Phonolite; Vagrant; Thermal Infrared Camera; Flir; USA/NSF; Mount Erebus; Active Source Seismic; GROUND-BASED OBSERVATIONS; Interferometry; Volatile Solubility; Redox State; Viscosity; Hydrogen Emission; Seismicity; Eruptions; Explosion Energy; FIELD SURVEYS; Radar Spectra; OBSERVATION BASED; Seismic Events; Strombolian Eruptions; Anorthoclase; Ice Caves; Iris; VOLCANO OBSERVATORY; Melt Inclusions; Ftir; Alkaline Volcanism; Tomography; TLS; Volcanic Gases; ANALYTICAL LAB", "locations": "Vesuvius; Cronus; Vagrant; Mount Erebus; Passcal", "north": -77.529724, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": "PHANEROZOIC \u003e CENOZOIC \u003e QUATERNARY \u003e HOLOCENE", "persons": "Kyle, Philip; Oppenheimer, Clive; Chaput, Julien; Jones, Laura; Fischer, Tobias", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e GROUND-BASED OBSERVATIONS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e VOLCANO OBSERVATORY; OTHER \u003e MODELS \u003e OBSERVATION BASED; OTHER \u003e PHYSICAL MODELS \u003e ANALYTICAL LAB", "repo": "IRIS", "repositories": "GitHub; IRIS; UNAVCO; USAP-DC", "science_programs": "MEVO", "south": -77.529724, "title": "Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)", "uid": "p0000383", "west": 167.15334}, {"awards": "0823101 Ducklow, Hugh", "bounds_geometry": null, "dataset_titles": "Expedition Data; Expedition data of LMG1301", "datasets": [{"dataset_uid": "002731", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of LMG1301", "url": "https://www.rvdata.us/search/cruise/LMG1301"}, {"dataset_uid": "001425", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/LMG1301"}], "date_created": "Mon, 24 Jun 2013 00:00:00 GMT", "description": "Since 1990, Palmer LTER (PAL) research has been guided by the hypothesis that variability in the polar marine ecosystem is mechanistically coupled to changes in the annual advance, retreat and spatial extent of sea ice. Since that time, the hypothesis has been modified to incorporate climate migration, i.e. the displacement of a cold, dry polar climate by a warm, moist climate regime in the northern component of the PAL region, producing fundamental changes in food web structure and elemental cycling. The observed northern changes are affecting all trophic levels and elemental cycling, and the primary mechanism of change involves match-mismatch dynamics. The proposed research builds on previous findings, with a new emphasis on process studies and modeling to elucidate the mechanistic links between teleconnections, climate change, physical oceanographic forcing and ecosystem dynamics. The proposed research will examine the hypothesis that regional warming and sea ice decline associated with historical and on-going climate migration in the northern part of the study area have altered key phenological relationships, leading to changes in species distributions, increasing trophic mismatches and changes in habitat, food availability, ecosystem dynamics and biogeochemical cycling. Through targeted process studies linked to numerical model simulations, the research also will test the hypothesis that deep cross-shelf canyons characterizing the core study region are focal areas for ecosystem processes that result in predictable, elevated food resources for top-predators. The effort includes the addition of 3 new PIs: a zooplankton ecologist with expertise in biogeochemical fluxes, a phytoplankton ecologist focusing on bio-optics and autonomous observations using gliders, and a numerical simulation modeler specializing in coupled global models of ocean circulation, plankton ecology and biogeochemical cycles. The program will add trace metal sampling and analysis, moored physical oceanographic sensors, a moored sediment trap in the south, drifting sediment traps and stable carbon (del 13C) and nitrogen (del 15N) isotope analyses. Missions lasting up to 45 days using gliders deployed before, during and after summer cruises will, along with moorings and satellite remote sensing of sea ice, ocean color, sea surface temperatures and wind fields, greatly extend the observational program in space and time. \u003cbr/\u003e\u003cbr/\u003eSince its inception, PAL has been a leader in Information Management to enable knowledge-building within and beyond the Antarctic, oceanographic and LTER communities. PAL has designed and deployed a new information infrastructure with a relational database architecture to facilitate data distribution and sharing. The Education and Outreach program capitalizes on the public\u0027s fascination with Antarctica to promote scientific literacy from kindergarten students to adult citizens concerned with climate change and environmental sustainability. Through communicating results to the public and working with scientific assessment bodies (e.g., IPCC) and Antarctic Treaty parties to protect Earth\u0027s last frontier, PAL researchers contribute to the national scientific agenda and the greater public benefit.", "east": null, "geometry": null, "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e PROFILERS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e GPS \u003e GPS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e XBT", "is_usap_dc": false, "keywords": "R/V LMG", "locations": null, "north": null, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Ducklow, Hugh", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V LMG", "repo": "R2R", "repositories": "R2R", "science_programs": "LTER", "south": null, "title": "Palmer, Antarctica Long Term Ecological Research Project", "uid": "p0000874", "west": null}, {"awards": "0636543 Murray, Alison; 0636319 Shaw, Timothy; 0636723 Helly, John; 0636440 Long, David", "bounds_geometry": "POLYGON((-55 -52,-53.5 -52,-52 -52,-50.5 -52,-49 -52,-47.5 -52,-46 -52,-44.5 -52,-43 -52,-41.5 -52,-40 -52,-40 -53.3,-40 -54.6,-40 -55.9,-40 -57.2,-40 -58.5,-40 -59.8,-40 -61.1,-40 -62.4,-40 -63.7,-40 -65,-41.5 -65,-43 -65,-44.5 -65,-46 -65,-47.5 -65,-49 -65,-50.5 -65,-52 -65,-53.5 -65,-55 -65,-55 -63.7,-55 -62.4,-55 -61.1,-55 -59.8,-55 -58.5,-55 -57.2,-55 -55.9,-55 -54.6,-55 -53.3,-55 -52))", "dataset_titles": "Antarctic Iceberg Tracking Database; Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean; Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "datasets": [{"dataset_uid": "000134", "doi": "", "keywords": null, "people": null, "repository": "PI website", "science_program": null, "title": "Antarctic Iceberg Tracking Database", "url": "http://www.scp.byu.edu/data/iceberg/database1.html"}, {"dataset_uid": "600067", "doi": "10.15784/600067", "keywords": "Antarctica; NBP0902; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "people": "Helly, John", "repository": "USAP-DC", "science_program": null, "title": "Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "url": "https://www.usap-dc.org/view/dataset/600067"}, {"dataset_uid": "600065", "doi": "10.15784/600065", "keywords": "Biota; Geochemistry; NBP0902; Oceans; Physical Oceanography; Sea Ice; Southern Ocean; Weddell Sea", "people": "Murray, Alison", "repository": "USAP-DC", "science_program": null, "title": "Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "url": "https://www.usap-dc.org/view/dataset/600065"}, {"dataset_uid": "600064", "doi": "10.15784/600064", "keywords": "Biota; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Oceans; Sea Ice; Sea Surface; Southern Ocean; Weddell Sea", "people": "Twining, Benjamin; Shaw, Tim", "repository": "USAP-DC", "science_program": null, "title": "Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "url": "https://www.usap-dc.org/view/dataset/600064"}], "date_created": "Mon, 22 Nov 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions:1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -40.0, "geometry": "POINT(-47.5 -58.5)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -52.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Twining, Benjamin; Shaw, Tim; Long, David; Murray, Alison; Helly, John", "platforms": "Not provided", "repo": "PI website", "repositories": "PI website; USAP-DC", "science_programs": null, "south": -65.0, "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "p0000511", "west": -55.0}, {"awards": "0632389 Murray, Alison; 0632278 Ducklow, Hugh", "bounds_geometry": "POLYGON((-77 -62,-75.5 -62,-74 -62,-72.5 -62,-71 -62,-69.5 -62,-68 -62,-66.5 -62,-65 -62,-63.5 -62,-62 -62,-62 -62.7,-62 -63.4,-62 -64.1,-62 -64.8,-62 -65.5,-62 -66.2,-62 -66.9,-62 -67.6,-62 -68.3,-62 -69,-63.5 -69,-65 -69,-66.5 -69,-68 -69,-69.5 -69,-71 -69,-72.5 -69,-74 -69,-75.5 -69,-77 -69,-77 -68.3,-77 -67.6,-77 -66.9,-77 -66.2,-77 -65.5,-77 -64.8,-77 -64.1,-77 -63.4,-77 -62.7,-77 -62))", "dataset_titles": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "datasets": [{"dataset_uid": "600061", "doi": "10.15784/600061", "keywords": "Antarctica; Antarctic Peninsula; Biota; Chemistry:fluid; Chemistry:Fluid; Oceans; Southern Ocean", "people": "Grzymski, Joseph; Murray, Alison", "repository": "USAP-DC", "science_program": null, "title": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "url": "https://www.usap-dc.org/view/dataset/600061"}], "date_created": "Thu, 08 Jul 2010 00:00:00 GMT", "description": "The Western Antarctic Peninsula is experiencing one of the most rapid rates of climate warming on Earth, with an increase of 5degrees C in the mean winter temperature in 50 years. Impacts on upper trophic levels are evident, though there have been few, if any studies that have considered the impacts on bacterioplankton in the Southern Ocean. This proposal will characterize the winter bacterioplankton genome, transcriptome, and proteome and discover those features (community composition, genes up-regulated, and proteins expressed) that are essential to winter bacterioplankton survival and livelihood. We have assembled a polar ocean ecology and genomics network including strategic partnerships with Palmer LTER, the British Antarctic Survey\u0027s ocean metagenome program, US and Canadian scientists studying the Arctic Ocean genome, an Australian colleague who specialized in archaeal proteomics, and French colleagues studying Sub-Antarctic and Coastal Adelie Land marine bacterioplankton. The primary objectives of this program are: 1 Describe the differences in diversity and genomic content between austral winter and summer bacterioplankton communities. 2. Investigate the winter-time bacterioplankton growth and cellular signals (mRNA and proteins expressed) in order to understand the specific adaptations key to survival. \u003cbr/\u003e\u003cbr/\u003eOur results will extend from the Antarctic to the Arctic - as the cold, dark, carbon-limited deep seas linking these two systems have many common features. Education and outreach activities target (i) undergraduate and graduate students, hopefully including minority students recruited through the Diversity in Research in Environmental and Marine Sciences (DREAMS) Program at VIMS; (ii) a broad audience with our education and outreach partnerships with The Cousteau Society and with the Census for Antarctic Marine Life program. Data and links to external databases will be listed on the http://genex2.dri.edu website. Sequence data will be publicly accessible in GenBank and IMG-M databases.", "east": -62.0, "geometry": "POINT(-69.5 -65.5)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -62.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Murray, Alison; Grzymski, Joseph; Ducklow, Hugh", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "uid": "p0000091", "west": -77.0}, {"awards": "9530398 Anderson, Robert; 9896290 Smith, Walker; 9530382 Smith, Walker", "bounds_geometry": "POLYGON((-179.9999 -43.5646,-143.99993 -43.5646,-107.99996 -43.5646,-71.99999 -43.5646,-36.00002 -43.5646,-0.000050000000016 -43.5646,35.99992 -43.5646,71.99989 -43.5646,107.99986 -43.5646,143.99983 -43.5646,179.9998 -43.5646,179.9998 -47.013473,179.9998 -50.462346,179.9998 -53.911219,179.9998 -57.360092,179.9998 -60.808965,179.9998 -64.257838,179.9998 -67.706711,179.9998 -71.155584,179.9998 -74.604457,179.9998 -78.05333,143.99983 -78.05333,107.99986 -78.05333,71.99989 -78.05333,35.99992 -78.05333,-0.000049999999987 -78.05333,-36.00002 -78.05333,-71.99999 -78.05333,-107.99996 -78.05333,-143.99993 -78.05333,-179.9999 -78.05333,-179.9999 -74.604457,-179.9999 -71.155584,-179.9999 -67.706711,-179.9999 -64.257838,-179.9999 -60.808965,-179.9999 -57.360092,-179.9999 -53.911219,-179.9999 -50.462346,-179.9999 -47.013473,-179.9999 -43.5646))", "dataset_titles": "Expedition Data", "datasets": [{"dataset_uid": "001874", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP9802"}, {"dataset_uid": "002164", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP9604"}, {"dataset_uid": "002162", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP9604A"}, {"dataset_uid": "002138", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP9708"}], "date_created": "Tue, 04 May 2010 00:00:00 GMT", "description": "95-30398 Anderson This research project is part of the US Joint Global Ocean Flux Study (JGOFS) Southern Ocean Program aimed at (1) a better understanding of the fluxes of carbon, both organic and inorganic, in the Southern Ocean, (2) identifying the physical, ecological and biogeochemical factors and processes which regulate the magnitude and variability of these fluxes, and (3) placing these fluxes into the context of the contemporary global carbon cycle. The overall objectives of JGOFS are to determine and understand processes controlling the time-varying fluxes of carbon and associated biogenic elements, and to predict the response of marine biogeochemical processes to climate change. The Southern Ocean is critical in the global carbon cycle, as judged by its size and the physical processes which occur in it (e.g., deep and intermediate water formation), but its present quantitative role is uncertain. JGOFS objectives for the Southern Ocean study are as follows: 1) to constrain the fluxes of carbon (organic and inorganic) and to place these fluxes in the context of the contemporary carbon cycle; 2) to identify the factors and processes which regulate the magnitude and variability of primary productivity and the fate of biogenic matter; 3) to determine the response of the Southern Ocean to natural climate perturbations; and 4) to predict the response of the Southern Ocean to climate change. In order to successfully address these objectives, a large field program has been designed to provide various investigators the opportunity to test specific hypotheses which relate to these broadly-defined objectives. We expect the field test to begin in September 1996, and last through March 1998 using two ships, the R.V. Palmer, and the R.V. Thompson. As most of the investigators will use hydrographic and nutrient data from these cruises, this proposal requests funds for the support of the analysis of nutrient concentrations during these thirteen crui ses. A team of oceanographic experts from a variety of institutions has been assembled to complete these analyses; furthermore, the data will be scrutinized for errors and provided in a timely fashion to all PI\u0027s in the project, as well as to the relevant oceanographic data storage facilities. The hydrography and coring groups have been put together using the successful model for the Arabian Sea JGOFS study, and in conjunction with the nutrient data (supported under a separate proposal), will form a large portion of the Southern Ocean JGOFS database which both field investigators and modelers will use to clarify the role of the Southern Ocean in the global carbon cycle.", "east": 179.9998, "geometry": "POINT(0 -89.999)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e MSBS", "is_usap_dc": false, "keywords": "R/V NBP", "locations": null, "north": -43.5646, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Anderson, Robert; Smith, Walker; Honjo, Susumu", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "R2R", "repositories": "R2R", "science_programs": null, "south": -78.05333, "title": "Management and Scientific Service in Support of the U.S. JGOFS Southern Ocean Process Study: Hydrography, Coring and Site Survey", "uid": "p0000629", "west": -179.9999}, {"awards": "0529815 Smith, Kenneth", "bounds_geometry": "POLYGON((-68.12004 -52.65918,-65.348168 -52.65918,-62.576296 -52.65918,-59.804424 -52.65918,-57.032552 -52.65918,-54.26068 -52.65918,-51.488808 -52.65918,-48.716936 -52.65918,-45.945064 -52.65918,-43.173192 -52.65918,-40.40132 -52.65918,-40.40132 -53.972709,-40.40132 -55.286238,-40.40132 -56.599767,-40.40132 -57.913296,-40.40132 -59.226825,-40.40132 -60.540354,-40.40132 -61.853883,-40.40132 -63.167412,-40.40132 -64.480941,-40.40132 -65.79447,-43.173192 -65.79447,-45.945064 -65.79447,-48.716936 -65.79447,-51.488808 -65.79447,-54.26068 -65.79447,-57.032552 -65.79447,-59.804424 -65.79447,-62.576296 -65.79447,-65.348168 -65.79447,-68.12004 -65.79447,-68.12004 -64.480941,-68.12004 -63.167412,-68.12004 -61.853883,-68.12004 -60.540354,-68.12004 -59.226825,-68.12004 -57.913296,-68.12004 -56.599767,-68.12004 -55.286238,-68.12004 -53.972709,-68.12004 -52.65918))", "dataset_titles": "Expedition Data; Expedition data of LMG0514A", "datasets": [{"dataset_uid": "001484", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP0902"}, {"dataset_uid": "002668", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of LMG0514A", "url": "https://www.rvdata.us/search/cruise/LMG0514A"}], "date_created": "Tue, 04 May 2010 00:00:00 GMT", "description": "This project seeks to examine the importance of icebergs to the pelagic ecosystem of the North-West Weddell Sea. Atmospheric warming has been associated with retreating glaciers and the increasing prevalence of icebergs in the Southern Ocean over the last decade. The highest concentration of icebergs occurs in the NW Weddell Sea, where they drift in a clockwise pattern to the northeast, following the contours of the Antarctic Peninsula through an area dubbed \"Iceberg Alley\". Little is known about the impact of free-drifting icebergs on the pelagic ecosystem of the Weddell Sea or on the Southern Ocean as a whole. It is hypothesized that as drifting islands, icebergs of small to intermediate size (\u003c 10 km in largest dimension) impart unique physical, chemical and biological characteristics to the surrounding water. Three general questions will be asked to address this hypothesis: 1) What are the dynamics (approximate size, abundance and spatial distribution) of free-drifting icebergs on temporal scales of days to months, based on correlation of field measurements with imagery derived from satellite sensors? 2) What is the relationship between the size of free-drifting icebergs and the structure of the associated pelagic communities? 3) What is the estimated combined impact of free-drifting icebergs in the NW Weddell Sea on the biological characteristics of the pelagic zone? This interdisciplinary study will use standard oceanographic sampling coupled with unique methodology for staging shipboard data from all types of sensors and survey methods to determine the sphere of influence for a diverse set of biological factors as a function of iceberg size. The exploratory research proposed here will provide critical data on the effects of atmospheric warming in the Antarctic Peninsula region. The recent prevalence of free drifting icebergs in the Southern Ocean should have a pronounced enrichment effect on the surrounding pelagic ecosystem, altering community dynamics. Enhanced primary production associated with these icebergs could influence the global carbon cycle since the Southern Ocean is considered a major sink for excess CO2 from the atmosphere. \u003cbr/\u003eThe proposed research will include an innovative education component through the Ocean Exploration Center (OEC), whose focus is to provide a comprehensive view of the oceans, intelligible to non-scientists and researchers alike, with direct access to state-of-the-art databases and selected websites. The OEC will allow users to access content which has been classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. The results from this iceberg project will be incorporated into the Antarctic Research division of the OEC, providing databases documenting the impact of free-drifting icebergs on the surrounding pelagic ecosystem. These data then will be extrapolated to evaluate the impact of icebergs on the ecosystem of the Weddell Sea. Graduate students, undergraduates, teachers and volunteers are an important part of the proposed field and laboratory work.", "east": -40.40132, "geometry": "POINT(-54.26068 -59.226825)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e CTD; IN SITU/LABORATORY INSTRUMENTS \u003e PRESSURE/HEIGHT METERS \u003e PRESSURE SENSORS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e GPS \u003e GPS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e ADCP; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e CTD; IN SITU/LABORATORY INSTRUMENTS \u003e MAGNETIC/MOTION SENSORS \u003e GRAVIMETERS \u003e GRAVIMETERS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e GPS \u003e GPS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e ADCP", "is_usap_dc": false, "keywords": "R/V LMG; R/V NBP", "locations": null, "north": -52.65918, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Smith, Ken", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V LMG; WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "R2R", "repositories": "R2R", "science_programs": null, "south": -65.79447, "title": "Free Drifting Icebergs: Influence of Floating Islands on Pelagic Ecosystems in the Weddell Sea.", "uid": "p0000551", "west": -68.12004}, {"awards": "0234163 Beardsley, Robert", "bounds_geometry": null, "dataset_titles": "Expedition data of NBP0103; Expedition data of NBP0104", "datasets": [{"dataset_uid": "002596", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of NBP0104", "url": "https://www.rvdata.us/search/cruise/NBP0104"}, {"dataset_uid": "002657", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of NBP0104", "url": "https://www.rvdata.us/search/cruise/NBP0104"}, {"dataset_uid": "002595", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of NBP0103", "url": "https://www.rvdata.us/search/cruise/NBP0103"}], "date_created": "Tue, 04 May 2010 00:00:00 GMT", "description": "This project will complete construction of a high-quality digital bathymetry database for the Southern Ocean component of the Global Ocean Ecosystem Dynamics GLOBEC) program. Existing along-track and swath bathymetry data collected in Marguerite Bay and in the West Antarctic Peninsula shelf study, have been assembled and merged with new SeaBeam and along-track data collected during cruises of the research vessels R/V Palmer and R/V Gould in 2001 and 2002. New bathymetry data has also been obtained from other US, British, and Russian sources to extend the program database. Once the final R/V Palmer and R/V Gould cruises are completed and other data added, the program database will be closed, edited, documented and made publicly available for use by international GLOBEC investigators and by the broader geophysics community. These results will be developed in conjunction with, and will become part of a planned circum-antarctic high resolution bathymetry database.", "east": null, "geometry": null, "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e MAGNETIC/MOTION SENSORS \u003e GRAVIMETERS \u003e GRAVIMETERS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e MSBS", "is_usap_dc": false, "keywords": "R/V NBP", "locations": null, "north": null, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Beardsley, Robert", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "R2R", "repositories": "R2R", "science_programs": null, "south": null, "title": "Digital Bathymetry Database for the U.S. Southern Ocean GLOBEC Program", "uid": "p0000814", "west": null}, {"awards": "0650034 Smith, Kenneth", "bounds_geometry": null, "dataset_titles": "Expedition Data; Expedition data of NBP0806; Expedition data of NBP0902", "datasets": [{"dataset_uid": "002649", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of NBP0806", "url": "https://www.rvdata.us/search/cruise/NBP0806"}, {"dataset_uid": "002650", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of NBP0902", "url": "https://www.rvdata.us/search/cruise/NBP0902"}, {"dataset_uid": "001484", "doi": "", "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition Data", "url": "https://www.rvdata.us/search/cruise/NBP0902"}], "date_created": "Tue, 04 May 2010 00:00:00 GMT", "description": "This project seeks to examine the importance of icebergs to the pelagic ecosystem of the North-West Weddell Sea. Atmospheric warming has been associated with retreating glaciers and the increasing prevalence of icebergs in the Southern Ocean over the last decade. The highest concentration of icebergs occurs in the NW Weddell Sea, where they drift in a clockwise pattern to the northeast, following the contours of the Antarctic Peninsula through an area dubbed \"Iceberg Alley\". Little is known about the impact of free-drifting icebergs on the pelagic ecosystem of the Weddell Sea or on the Southern Ocean as a whole. It is hypothesized that as drifting islands, icebergs of small to intermediate size (\u003c 10 km in largest dimension) impart unique physical, chemical and biological characteristics to the surrounding water. Three general questions will be asked to address this hypothesis: 1) What are the dynamics (approximate size, abundance and spatial distribution) of free-drifting icebergs on temporal scales of days to months, based on correlation of field measurements with imagery derived from satellite sensors? 2) What is the relationship between the size of free-drifting icebergs and the structure of the associated pelagic communities? 3) What is the estimated combined impact of free-drifting icebergs in the NW Weddell Sea on the biological characteristics of the pelagic zone? This interdisciplinary study will use standard oceanographic sampling coupled with unique methodology for staging shipboard data from all types of sensors and survey methods to determine the sphere of influence for a diverse set of biological factors as a function of iceberg size. The exploratory research proposed here will provide critical data on the effects of atmospheric warming in the Antarctic Peninsula region. The recent prevalence of free drifting icebergs in the Southern Ocean should have a pronounced enrichment effect on the surrounding pelagic ecosystem, altering community dynamics. Enhanced primary production associated with these icebergs could influence the global carbon cycle since the Southern Ocean is considered a major sink for excess CO2 from the atmosphere. \u003cbr/\u003eThe proposed research will include an innovative education component through the Ocean Exploration Center (OEC), whose focus is to provide a comprehensive view of the oceans, intelligible to non-scientists and researchers alike, with direct access to state-of-the-art databases and selected websites. The OEC will allow users to access content which has been classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. The results from this iceberg project will be incorporated into the Antarctic Research division of the OEC, providing databases documenting the impact of free-drifting icebergs on the surrounding pelagic ecosystem. These data then will be extrapolated to evaluate the impact of icebergs on the ecosystem of the Weddell Sea. Graduate students, undergraduates, teachers and volunteers are an important part of the proposed field and laboratory work.", "east": null, "geometry": null, "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e CTD; IN SITU/LABORATORY INSTRUMENTS \u003e MAGNETIC/MOTION SENSORS \u003e GRAVIMETERS \u003e GRAVIMETERS; EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e POSITIONING/NAVIGATION \u003e GPS \u003e GPS; IN SITU/LABORATORY INSTRUMENTS \u003e PROFILERS/SOUNDERS \u003e ACOUSTIC SOUNDERS \u003e ADCP", "is_usap_dc": false, "keywords": "R/V NBP", "locations": null, "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Smith, Ken", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "R2R", "repositories": "R2R", "science_programs": null, "south": null, "title": "Free Drifting Icebergs: Influence of Floating Islands on Pelagic Ecosystems in the Weddell Sea.", "uid": "p0000840", "west": null}, {"awards": "0130525 Fraser, William", "bounds_geometry": null, "dataset_titles": "Expedition data of NBP0105", "datasets": [{"dataset_uid": "002605", "doi": null, "keywords": null, "people": null, "repository": "R2R", "science_program": null, "title": "Expedition data of NBP0105", "url": "https://www.rvdata.us/search/cruise/NBP0105"}], "date_created": "Tue, 04 May 2010 00:00:00 GMT", "description": "The potential consequence of human impact on wildlife in Antarctica has been debated for many decades. Scientists, support staff and visitors in Antarctica may have an effect on the behavior and population dynamics of marine mammals and seabirds. Since the early 1970\u0027s, shipboard tourism has expanded to the point where it is timely to address the question, using a scientific research approach. The focus of this study is to examine the potential effect of tourist activities on the Adelie Penguins (Pygoscelis adeliae) in the Antarctic Peninsula. The topic has gathered the interest and opinions of those in private industry, the scientific community, government organizations and environmental groups. A key concern is that increases in these activities may eventually overcome the ability of research to address critical issues in a timely and biologically meaningful manner. The approach to understanding how tourism might affect Adelie Penguins must involve both a study of human activity and a study of natural variability in the physical environment. The ongoing Palmer Long Term Ecological Research program focuses on the ecosystem and its components and thus addresses the issues of natural variability. This project focuses on the human dimension and continues a tourist-monitoring program begun as a pilot project near Palmer Station. This site is in a geographic location that mirrors current patterns in tourism and tourist-wildlife interactions in the western Antarctic Peninsula. It also offers a setting that provides unique opportunities for human impacts research. This includes the presence of long-term databases that document environmental variability over multiple time and space scales in both marine and terrestrial habitats, and the ability to examine potential tourist impacts as part of controlled experiments. The results of the study will have important implications to understanding interactions between climate change and ecosystem response, and for detecting, mitigating and managing the consequences of human activities such as tourism.", "east": null, "geometry": null, "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e MAGNETIC/MOTION SENSORS \u003e GRAVIMETERS \u003e GRAVIMETERS", "is_usap_dc": false, "keywords": "R/V NBP", "locations": null, "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Fraser, William; Smith, Raymond", "platforms": "WATER-BASED PLATFORMS \u003e VESSELS \u003e SURFACE \u003e R/V NBP", "repo": "R2R", "repositories": "R2R", "science_programs": null, "south": null, "title": "Monitoring the Human Impact and Environmental Variability on Adelie Penguins at Palmer Station, Antarctica", "uid": "p0000819", "west": null}, {"awards": "0808947 Hofmann, Gretchen", "bounds_geometry": "POLYGON((-180 -70,-177 -70,-174 -70,-171 -70,-168 -70,-165 -70,-162 -70,-159 -70,-156 -70,-153 -70,-150 -70,-150 -70.7,-150 -71.4,-150 -72.1,-150 -72.8,-150 -73.5,-150 -74.2,-150 -74.9,-150 -75.6,-150 -76.3,-150 -77,-153 -77,-156 -77,-159 -77,-162 -77,-165 -77,-168 -77,-171 -77,-174 -77,-177 -77,180 -77,178 -77,176 -77,174 -77,172 -77,170 -77,168 -77,166 -77,164 -77,162 -77,160 -77,160 -76.3,160 -75.6,160 -74.9,160 -74.2,160 -73.5,160 -72.8,160 -72.1,160 -71.4,160 -70.7,160 -70,162 -70,164 -70,166 -70,168 -70,170 -70,172 -70,174 -70,176 -70,178 -70,-180 -70))", "dataset_titles": "Science of Opportunity: A SGER proposal to support the development of genomic resources for Antarctic pteropods", "datasets": [{"dataset_uid": "600088", "doi": "10.15784/600088", "keywords": "Biota; Genomics; Oceans; Southern Ocean", "people": "Hofmann, Gretchen; Fabry, Victoria", "repository": "USAP-DC", "science_program": null, "title": "Science of Opportunity: A SGER proposal to support the development of genomic resources for Antarctic pteropods", "url": "https://www.usap-dc.org/view/dataset/600088"}], "date_created": "Sat, 20 Feb 2010 00:00:00 GMT", "description": "This Small Grant for Exploratory Research (SGER) will support the rapid acquisition of DNA sequence for the Antarctic pteropod Limacina helicina, a resource that would allow the development of a cDNA microarray to profile gene expression in this critical marine invertebrate in response to ocean acidification. This request would facilitate the collaboration of the PI (Hofmann), a marine molecular ecologist, with co-PI, Prof. Victoria Fabry, an expert in pteropod calcification biology, and a leader in the ocean acidification research community. Finally, the resources developed here would be shared with the polar research community and all DNA sequence data and protocols would be available via web databases. Notably, the genomic tool developed here would most likely be useful for pteropods from Antarctic and Arctic waters. The broader impacts of this project would be the development of genomic tools for a critical Antarctic marine invertebrate that is threatened by ocean acidification. In addition, these resources would be shared with the polar biology research community.", "east": -150.0, "geometry": "POINT(-175 -73.5)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -70.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Hofmann, Gretchen; Fabry, Victoria", "platforms": "Not provided", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Science of Opportunity: A SGER proposal to support the development of genomic resources for Antarctic pteropods", "uid": "p0000213", "west": 160.0}, {"awards": "0741510 Yuan, Xiaojun", "bounds_geometry": "POLYGON((-180 -69,-172 -69,-164 -69,-156 -69,-148 -69,-140 -69,-132 -69,-124 -69,-116 -69,-108 -69,-100 -69,-100 -70,-100 -71,-100 -72,-100 -73,-100 -74,-100 -75,-100 -76,-100 -77,-100 -78,-100 -79,-108 -79,-116 -79,-124 -79,-132 -79,-140 -79,-148 -79,-156 -79,-164 -79,-172 -79,180 -79,178.5 -79,177 -79,175.5 -79,174 -79,172.5 -79,171 -79,169.5 -79,168 -79,166.5 -79,165 -79,165 -78,165 -77,165 -76,165 -75,165 -74,165 -73,165 -72,165 -71,165 -70,165 -69,166.5 -69,168 -69,169.5 -69,171 -69,172.5 -69,174 -69,175.5 -69,177 -69,178.5 -69,-180 -69))", "dataset_titles": "Temperature and salinity measurements collected using XBT, XCTD from the Oden and other platforms in the Southern Oceans from 2003-2008 (NODC Accession 0053045)", "datasets": [{"dataset_uid": "000214", "doi": "", "keywords": null, "people": null, "repository": "NCEI", "science_program": null, "title": "Temperature and salinity measurements collected using XBT, XCTD from the Oden and other platforms in the Southern Oceans from 2003-2008 (NODC Accession 0053045)", "url": "https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0053045"}], "date_created": "Sat, 20 Feb 2010 00:00:00 GMT", "description": "Abstract\u003cbr/\u003e\u003cbr/\u003eThe project goal is to investigate the ocean-atmosphere-ice (OAI) interactions in the Amundsen and Ross Seas during the austral summer of 2007-08 using hydrographic measurements (CTD and XBT) in conjunction with (1) ship-based observations and satellite-derived estimates of sea ice concentration, and (2) ship-based observations and re-analyses of meteorological variables. The major scientific objectives are as follows: (1) to examine upper ocean characteristics along three transects in the Amundsen Sea and two transects in the Ross Sea within the context of ice-atmosphere variability over the preceding winter-spring season and as compared to other years where data are available; (2) to determine if there is additional evidence of increased upwelling of warm Circumpolar Deep Water onto the shelf in the Amundsen Sea and/or increased freshening in the Ross Sea as has been inferred by previous, but limited, ocean surveys in these regions; and (3) to examine the spatial variability in ocean thermal structure along the ship\u0027s track (outside the transects) to provide greater regional context and to compare with ocean XBT data collected during Oden 2006-07. A repeated temperature survey between the Amundsen and Ross Sea is particularly invaluable, given that this sector is the regional center of the high latitude OAI response to ENSO, thus providing opportunity for examining and linking regional oceanic temporal variability to global climate variability. The research will improve our understanding of the high latitude OAI response to climate change, and provide the physical context for the observed biology and geochemistry (investigated by our colleagues. Our results will be made widely available through research publications and internet-available databases, and through the strong public outreach efforts of Lamont-Doherty Earth Observatory. The outreach efforts will help increase awareness and understanding of anthropogenic climate change, melting ice, and ecosystem alteration in the highly sensitive Antarctic.", "east": -100.0, "geometry": "POINT(-147.5 -74)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -69.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Yuan, Xiaojun; Stammerjohn, Sharon", "platforms": "Not provided", "repo": "NCEI", "repositories": "NCEI", "science_programs": null, "south": -79.0, "title": "SGER: Science-of-Opportunity Aboard Icebreaker Oden: Ocean-Atmosphere-Ice Interactions and Changes", "uid": "p0000562", "west": 165.0}, {"awards": "0440414 Steig, Eric", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Stable Isotope Studies at East Antarctic US ITASE Sites", "datasets": [{"dataset_uid": "600042", "doi": "10.15784/600042", "keywords": "Antarctica; Atmosphere; Climate; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; ITASE; Meteorology; Paleoclimate; Satellite Remote Sensing; Weather Station Data", "people": "Steig, Eric J.", "repository": "USAP-DC", "science_program": "ITASE", "title": "Stable Isotope Studies at East Antarctic US ITASE Sites", "url": "https://www.usap-dc.org/view/dataset/600042"}], "date_created": "Mon, 14 Sep 2009 00:00:00 GMT", "description": "This award supports a project to obtain stable isotope profiles from shallow (\u003c100 m) ice cores from East Antarctica, to add to the growing database of environmental proxy data collected under the auspices of the \"ITASE\" (International TransAntarctic Scientific Expedition) program. In Antarctica, the instrumental record of climate is particularly short (~40 years except in a few isolated locations on the coast), and ice core proxy data are the only means available for extending this record into the past. The use of stable isotopes of water (18-O/16-O and D/H ratios) from ice cores as proxies for temperature is well established for both very short (i.e. seasonal) and long timescales (centuries, millennia). Using multivariate regression methods and shallow ice cores from West Antarctica, a reconstruction of Antarctic climate over the last ~150 years has been developed which suggests the continent has been warming, on average, at a rate of ~0.2 K/century. Further improving these reconstructions is the chief motivation for further extending the US ITASE project. Ten to fifteen shallow (~ 100 m) from Victoria Land, East Antarctica will be obtained and analyzed. The core will be collected along a traverse route beginning at Taylor Dome and ending at the South Pole. Age-depth relationships for the cores will be determined through a combination of stable isotopes, visual stratigraphy and seasonal chemical signatures and marker horizons. Reconstructions of Antarctic climate obtained from these cores will be incorporated into the global network of paleoclimate information, which has been important in science, policy and educational contexts. The project will include graduate student and postdoctoral training and field experience.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": true, "keywords": "FIELD SURVEYS", "locations": null, "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "paleo_time": null, "persons": "Steig, Eric J.", "platforms": "LAND-BASED PLATFORMS \u003e FIELD SITES \u003e FIELD SURVEYS", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Stable Isotope Studies at East Antarctic US ITASE Sites", "uid": "p0000202", "west": -180.0}, {"awards": "0741403 Sherrell, Robert", "bounds_geometry": "POLYGON((-180 -69,-172.5 -69,-165 -69,-157.5 -69,-150 -69,-142.5 -69,-135 -69,-127.5 -69,-120 -69,-112.5 -69,-105 -69,-105 -69.9,-105 -70.8,-105 -71.7,-105 -72.6,-105 -73.5,-105 -74.4,-105 -75.3,-105 -76.2,-105 -77.1,-105 -78,-112.5 -78,-120 -78,-127.5 -78,-135 -78,-142.5 -78,-150 -78,-157.5 -78,-165 -78,-172.5 -78,180 -78,178.8 -78,177.6 -78,176.4 -78,175.2 -78,174 -78,172.8 -78,171.6 -78,170.4 -78,169.2 -78,168 -78,168 -77.1,168 -76.2,168 -75.3,168 -74.4,168 -73.5,168 -72.6,168 -71.7,168 -70.8,168 -69.9,168 -69,169.2 -69,170.4 -69,171.6 -69,172.8 -69,174 -69,175.2 -69,176.4 -69,177.6 -69,178.8 -69,-180 -69))", "dataset_titles": null, "datasets": null, "date_created": "Tue, 10 Mar 2009 00:00:00 GMT", "description": "Abstract\u003cbr/\u003e\u003cbr/\u003eThe research objective is (1) to determine the distributions and dynamics of a full suite of bioactive trace metals in dissolved and suspended particulate forms, along sampling transects of the Amundsen and Ross Seas. And (2) to test the sensitivity of overall cellular metal stoichiometry (metal/carbon ratios) to natural gradients in species assemblage and Fe availability. Our earlier findings from a single Ross Sea station and from a Drake Passage crossing suggest that Fe-limited phytoplankton cells are unusually enriched in Zn, Cu and Cd relative to biomass carbon, with strong implications for the biogeochemical cycling of these elements relative to carbon fluxes in the Southern Ocean. In collaboration with other researchers on the cruise, we will also measure metal stoichiometry of cells exposed to predicted 2010 temperature and carbon dioxide levels in shipboard incubation studies, as a window into possible effects of climate change on metals biogeochemistry in these regions. This proposal will support close international collaborations and lasting infrastructure development as US and Swedish scientists, and more importantly, their students, work toward shared the shared goal of understanding a region that is experiencing one of the fastest rates of climate change on the globe. Trace metal micro-nutrients are a key control on the productivity of Antarctic marine ecosystems. Our results will be made widely available through research publications and internet-available databases, and public outreach through COSEE at Rutgers University.", "east": -105.0, "geometry": "POINT(-148.5 -73.5)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -69.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Sherrell, Robert", "platforms": "Not provided", "repositories": null, "science_programs": null, "south": -78.0, "title": "SGER: Science-of-Opportunity Aboard Icebreaker Oden: Bioactive trace metals in the Amundsen and Ross Seas", "uid": "p0000561", "west": 168.0}, {"awards": "0225110 Garrott, Robert", "bounds_geometry": "POLYGON((163.1 -70.3,163.59 -70.3,164.08 -70.3,164.57 -70.3,165.06 -70.3,165.55 -70.3,166.04 -70.3,166.53 -70.3,167.02 -70.3,167.51 -70.3,168 -70.3,168 -70.98,168 -71.66,168 -72.34,168 -73.02,168 -73.7,168 -74.38,168 -75.06,168 -75.74,168 -76.42,168 -77.1,167.51 -77.1,167.02 -77.1,166.53 -77.1,166.04 -77.1,165.55 -77.1,165.06 -77.1,164.57 -77.1,164.08 -77.1,163.59 -77.1,163.1 -77.1,163.1 -76.42,163.1 -75.74,163.1 -75.06,163.1 -74.38,163.1 -73.7,163.1 -73.02,163.1 -72.34,163.1 -71.66,163.1 -70.98,163.1 -70.3))", "dataset_titles": "Weddell Seal data", "datasets": [{"dataset_uid": "000120", "doi": "", "keywords": null, "people": null, "repository": "PI website", "science_program": null, "title": "Weddell Seal data", "url": "http://www.montana.edu/weddellseals/"}], "date_created": "Wed, 28 Jan 2009 00:00:00 GMT", "description": "The Erebus Bay Weddell seal population study in eastern McMurdo Sound, Antarctica was initiated in 1968 and represents one of the longest intensive field investigations of a long-lived mammal in existence. Over the thirty-four year period of this study a total of 15,636 animals have been tagged with 144,927 re-sighting records logged in the current database. As such, this study is an extremely valuable resource for understanding population dynamics of not only Weddell seals, but also other species of both terrestrial and marine mammals with similar life-history characteristics. With the retirement of the original investigator, Dr. Donald Siniff, this proposal represents an effort to transition the long-term studies to a new team of investigators. Dr. Robert Garrott and Dr. Jay Rotella propose building upon the foundation with two lines of investigation that combine use of the long-term database with new field initiatives. The continuity of the demographic data will be maintained by annually marking all pups born, replace lost or broken tags, and perform multiple mark-recapture censuses of the Erebus Bay seal colonies. The new data will be combined with the existing database and a progressively complex series of analyses will be performed using recently developed mark-recapture methods to decompose, evaluate, and integrate the demographic characteristics of the Erebus Bay Weddell seal population. These analyses will allow the testing of specific hypotheses about population regulation as well as temporal and spatial patterns of variation in vital rates among colonies within the population that have been posed by previous investigators, but have not been adequately evaluated due to data and analytical limitations. The primary new field initiative will involve an intensive study of mass dynamics of both pups and adult females as a surrogate measure for assessing annual variation in marine resources and their potential role in limiting and/or regulating the population. In conjunction with the collection of data on body mass dynamics the investigators will use satellite imagery to develop an extended time series of sea ice extent in McMurdo Sound. Regional extent of sea ice affects both regional primary productivity and availability of haul out areas for Weddell seals. Increased primary productivity may increase marine resources which would be expected to have a positive affect on Weddell seal foraging efficiency, leading to increased body mass. These data combined with the large proportion of known-aged seals in the current study population (\u003e60%) will allow the investigators to develop a powerful database to test specific hypotheses about ecological processes affecting Weddell seals. Knowledge of the mechanisms that limit and/or regulate Weddell seal populations and the specific bio-physical linkages between climate, oceans, ice, and Antarctic food webs can provide important contributions to understanding of pinniped population dynamics, as well as contribute more generally to theoretical understanding of population, community, and ecosystem patterns and processes. Such knowledge can be readily applied elsewhere to enhance the ability of natural resource managers to effectively maintain assemblages of other large-mammal species and the ecological processes that they facilitate. Continuation of this long-term study may also contribute to understanding the potential impacts of human activities such as global climate warming and the commercial exploitation of Antarctic marine resources. And finally, the study can contribute significantly to the development and testing of new research and analytical methodologies that will almost certainly have many other applications.", "east": 168.0, "geometry": "POINT(165.55 -73.7)", "instruments": null, "is_usap_dc": true, "keywords": "Not provided", "locations": null, "north": -70.3, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "paleo_time": null, "persons": "Garrott, Robert; Siniff, Donald; Rotella, Jay", "platforms": "Not provided", "repo": "PI website", "repositories": "PI website", "science_programs": null, "south": -77.1, "title": "Patterns and Processes: Dynamics of the Erebus Bay Weddell Seal Population", "uid": "p0000109", "west": 163.1}, {"awards": "0230469 Wise, Sherwood", "bounds_geometry": null, "dataset_titles": null, "datasets": null, "date_created": "Tue, 31 Jul 2007 00:00:00 GMT", "description": "This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports the development of a standardized diatom image catalog or database. Diatoms are considered by many to be the most important microfossil group used today in the study of Antarctic Cenozoic marine deposits south of the Polar Front, from the near shore to deep sea. These microfossils, with walls of silica called frustules, are produced by single-celled plants (algae of the Class Bacillariophyceae) in a great variety of forms. Consequently, they have great biostratigraphic importance in the Southern Ocean and elsewhere for determining the age of marine sediments. Also, paleoclimatic and paleoceanographic studies increasingly rely on fossil diatom data. Changing biogeographic distributions of given taxa indicate shifting paleoecological conditions and provide evidence of the surface productivity and temperatures of ancient oceans. The generality of conclusions, though, is limited by variation in species concepts among workers. The broad research community relies, directly or indirectly, on the accurate identification of diatom species. Current technology can be used to greatly improve upon the standard references that have been used in making these identifications.\u003cbr/\u003e\u003cbr/\u003eThis project will develop an interactive digital-image catalog of modern and Cenozoic fossil diatoms of the Southern Ocean called \"DiatomWare\" for use by specialists and educators as an aid in rapid, accurate, and consistent species identification. As such, this will be a researcher\u0027s resource. It will be especially useful where it is not possible to maintain standard library resources such as onboard research vessels or at remote stations such as McMurdo Station. Major Antarctic geological drilling initiatives such as the new SHALDRIL project and the pending ANDRILL project will benefit from this product because they will rely heavily on diatom biostratigraphy to achieve their research objectives. The DiatomWare image database will be modeled on NannoWare, which was released in October 2002 on CD-ROM as a publication of the International Nannoplankton Association. BugCam will be adapted and modified as necessary to run the DiatomWare database, which can then be run from desktop or laptop computers. Images and text for the database will be scanned from the literature or captured in digital form from light or scanning electron microscopes.\u003cbr/\u003e\u003cbr/\u003eThe software interface will include a number of data fields that can be accessed by the click of a mouse button. Primary information will be the images and descriptions of the holotypes. In addition, representative images of paratypes or hypotypes will be included whenever possible in plain transmitted, differential interference contrast light and, when available, as drawings and SEM images. Also included will be a 35-word or less English diagnosis (\"mini-description\"), the biostratigraphic range in terms of zones and linear time, bibliographic references, lists of species considered junior synonyms, and similar species. The list of similar species will be cross-referenced with their respective image files to enable quick access for direct visual comparison on the viewing screen. Multiple images can be brought to the viewing screen simultaneously, and a zoom feature will permit image examination at a wide range of magnifications. Buttons will allow range charts, a bibliography, and key public-domain publications from the literature to be called up from within the program. The DiatomWare/BugCam package will be distributed at a nominal cost through a major nonprofit society via CD-ROM and free to Internet users on the Worldwide Web. Quality control measures will include critical review of the finalized database by a network of qualified specialists. The completed database will include descriptions and images of between 350 and 400 species, including fossil as well as modern forms that have no fossil record.\u003cbr/\u003e\u003cbr/\u003eThe development of the proposed diatom image database will be important to all research fields that depend on accurate biostratigraphic dating and paleoenvironmental interpretation of Antarctic marine sediments and plankton. The database will also serve as a valuable teaching tool for micropaleontology students and their professors, will provide a rapid means of keying down species for micropaleontologists of varying experience and background, and will promote a uniformity of taxonomic concepts since it will be developed and continuously updated with the advice of a community of nannofossil fossil experts. Broad use of the database is anticipated since it will be widely available through the Internet and on CD-ROM for use on personal computers that do not require large amounts of memory, costly specialized programs, or additional hardware.", "east": null, "geometry": null, "instruments": null, "is_usap_dc": false, "keywords": "Not provided", "locations": null, "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Wise, Sherwood", "platforms": "Not provided", "repositories": null, "science_programs": null, "south": null, "title": "DiatomWare: An Interactive Digital Image Catalog for Antarctic Cenozoic Diatoms", "uid": "p0000062", "west": null}, {"awards": "0338359 Saltzman, Eric", "bounds_geometry": "POINT(-148.81 -81.65)", "dataset_titles": "Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br); Antarctic Ice Cores: Methyl Chloride and Methyl Bromide; Ice Core Air Carbonyl Sulfide Measurements - SPRESSO Ice Core; Methane and Carbonyl Sulfide Analysis of Siple Dome Ice Core Subsamples", "datasets": [{"dataset_uid": "609313", "doi": "10.7265/N5DN430Q", "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; ITASE; Paleoclimate; Siple Dome Ice Core; South Pole; SPRESSO; SPRESSO Ice Core", "people": "Saltzman, Eric; Aydin, Murat; Williams, Margaret; Tatum, Cheryl", "repository": "USAP-DC", "science_program": null, "title": "Antarctic Ice Cores: Methyl Chloride and Methyl Bromide", "url": "https://www.usap-dc.org/view/dataset/609313"}, {"dataset_uid": "609279", "doi": "10.7265/N53B5X3G", "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core; WAISCORES", "people": "Aydin, Murat; Saltzman, Eric", "repository": "USAP-DC", "science_program": "Siple Dome Ice Core", "title": "Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)", "url": "https://www.usap-dc.org/view/dataset/609279"}, {"dataset_uid": "609131", "doi": "10.7265/N5P848VP", "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Siple Dome; Siple Dome Ice Core; WAISCORES", "people": "Aydin, Murat; Saltzman, Eric", "repository": "USAP-DC", "science_program": "Siple Dome Ice Core", "title": "Methane and Carbonyl Sulfide Analysis of Siple Dome Ice Core Subsamples", "url": "https://www.usap-dc.org/view/dataset/609131"}, {"dataset_uid": "601357", "doi": "10.15784/601357", "keywords": "Antarctica; Atmospheric Gases; Gas Measurement; Ice Core; Ice Core Gas Records; Trace Gases", "people": "Saltzman, Eric; Aydin, Murat", "repository": "USAP-DC", "science_program": null, "title": "Ice Core Air Carbonyl Sulfide Measurements - SPRESSO Ice Core", "url": "https://www.usap-dc.org/view/dataset/601357"}], "date_created": "Wed, 16 Nov 2005 00:00:00 GMT", "description": "This award supports the analysis, in Antarctic ice cores, of the ozone depleting substances methyl bromide (CH3Br) and methyl chloride (CH3Cl), and the sulfur-containing gas, carbonyl sulfide (OCS). The broad scientific goal is to assess the level and variability of these gases in the preindustrial atmosphere. This information will allow testing of current models for sources and sinks of these gases from the atmosphere, and to indirectly assess the impact of anthropogenic activities on their biogeochemical cycles. Longer-term records will shed light on the climatic sensitivity of the atmospheric burden of these gases, and ultimately on the biogeochemical processes controlling them. These gases are present in ice at parts per trillion levels, and the current database consists entirely of a small number of measurements made in from a shallow ice core from Siple Dome, Antarctica. This project will involve studies of ice core samples from three Antarctic sites: Siple Station, Siple Dome, and South Pole. The sampling strategy is designed to accomplish several objectives: 1) to verify the atmospheric mixing ratios previously observed in shallow Siple Dome ice for OCS, CH3Br, and CH3Cl at sites with very different accumulation rates and surface temperatures; 2) to obtain a well-dated, high resolution record from a high accumulation rate site (Siple Station), that can provide overlap in mean gas age with Antarctic firn air samples; 3) explore Holocene variability in trace gas mixing ratios; and 4) to make the first measurements of these trace gases in Antarctic glacial ice. In terms of broader impact on society, this research will help to provide a stronger scientific basis for policy decisions regulating the production and use of ozone-depleting and climate-active gases. Specifically, the methyl bromide results will contribute to the current debate on the impact of recent regulation (via the Montreal Protocol and its Amendments) on atmospheric levels. Determination of pre-industrial atmospheric variability of ozone-depleting substances will help place more realistic constraints on scenarios used for future projections of stratospheric ozone and its climatic impacts. This research will involve the participation of both graduate and undergraduate students.", "east": -148.81, "geometry": "POINT(-148.81 -81.65)", "instruments": "IN SITU/LABORATORY INSTRUMENTS \u003e CORERS \u003e CORING DEVICES; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e GAS CHROMATOGRAPHS; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e MASS SPECTROMETERS; IN SITU/LABORATORY INSTRUMENTS \u003e CORERS \u003e CORING DEVICES; IN SITU/LABORATORY INSTRUMENTS \u003e CHEMICAL METERS/ANALYZERS \u003e GAS CHROMATOGRAPHS; IN SITU/LABORATORY INSTRUMENTS \u003e SPECTROMETERS/RADIOMETERS \u003e MASS SPECTROMETERS", "is_usap_dc": true, "keywords": "Ice Core Gas Records; Carbonyl Sulfide; Siple Coast; Chloride; Trapped Gases; Snow; Ice Core Chemistry; Chromatography; Siple; GROUND STATIONS; Atmospheric Gases; Ozone Depletion; AWS Siple; Ice Sheet; Ice Core Data; Antarctica; Glaciology; West Antarctica; Atmospheric Chemistry; Ice Core; Stratigraphy; LABORATORY; Methane; Mass Spectrometer; GROUND-BASED OBSERVATIONS; WAISCORES; Msa; Mass Spectrometry; Not provided; Siple Dome; Gas Measurement", "locations": "Antarctica; Siple Coast; Siple Dome; West Antarctica; Siple", "north": -81.65, "nsf_funding_programs": "Antarctic Glaciology", "paleo_time": null, "persons": "Saltzman, Eric; Aydin, Murat; Williams, Margaret; Tatum, Cheryl", "platforms": "LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e GROUND-BASED OBSERVATIONS; LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e GROUND STATIONS; Not provided; OTHER \u003e PHYSICAL MODELS \u003e LABORATORY", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.65, "title": "Methyl chloride and methyl bromide in Antarctic ice cores", "uid": "p0000032", "west": -148.81}, {"awards": "0088035 Arcone, Steven", "bounds_geometry": "POLYGON((-135 -75,-130.5 -75,-126 -75,-121.5 -75,-117 -75,-112.5 -75,-108 -75,-103.5 -75,-99 -75,-94.5 -75,-90 -75,-90 -76.5,-90 -78,-90 -79.5,-90 -81,-90 -82.5,-90 -84,-90 -85.5,-90 -87,-90 -88.5,-90 -90,-94.5 -90,-99 -90,-103.5 -90,-108 -90,-112.5 -90,-117 -90,-121.5 -90,-126 -90,-130.5 -90,-135 -90,-135 -88.5,-135 -87,-135 -85.5,-135 -84,-135 -82.5,-135 -81,-135 -79.5,-135 -78,-135 -76.5,-135 -75))", "dataset_titles": "US International Trans-Antarctic Scientific Expedition 400 MHz Subsurface Radar Profiles; US International Trans-Antarctic Scientific Expedition (US ITASE): GPR Profiles and Accumulation Mapping", "datasets": [{"dataset_uid": "609269", "doi": "10.7265/N5GH9FV6", "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; ITASE; WAIS", "people": "Mayewski, Paul A.; Kaspari, Susan; Arcone, Steven; Spikes, Vandy Blue; Hamilton, Gordon S.", "repository": "USAP-DC", "science_program": "ITASE", "title": "US International Trans-Antarctic Scientific Expedition (US ITASE): GPR Profiles and Accumulation Mapping", "url": "https://www.usap-dc.org/view/dataset/609269"}, {"dataset_uid": "609254", "doi": "10.7265/N58050J7", "keywords": "Airborne Radar; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ITASE; Radar; WAIS", "people": "Arcone, Steven", "repository": "USAP-DC", "science_program": null, "title": "US International Trans-Antarctic Scientific Expedition 400 MHz Subsurface Radar Profiles", "url": "https://www.usap-dc.org/view/dataset/609254"}], "date_created": "Sun, 01 May 2005 00:00:00 GMT", "description": "This award supports continued acquisition of high resolution, radar reflection profiles of the snow and ice stratigraphy between core sites planned along traverse routes of the U.S. component of the International\u003cbr/\u003eTrans-Antarctic Scientific Expedition (U.S.-ITASE). The purpose is to use the profiles to establish the structure and continuity of firn stratigraphic horizons over hundreds of kilometers and to quantitatively\u003cbr/\u003eassess topographic and ice movement effects upon snow deposition. Other objectives are to establish the climatic extent that a single site represents and to investigate the cause of firn reflections. The radar\u003cbr/\u003ewill also be used to identify crevasses ahead of the traverse vehicles in order to protect the safety of the scientists and support personnel on the traverse. Collaboration with other ITASE investigators will use the radar horizons as continuous isochronic references fixed by the core dating to calculate historical snow accumulation rates. The primary radar system uses 400-MHz (center frequency) short-pulse antennas, which (with processing) gives the penetration of 50-70 meters. This is the depth which is required to exceed the 200-year deposition horizon along the traverse routes. Profiles at 200 MHz will also be recorded if depths greater than 70 meters are of interest. Processing will be accomplished by data compression (stacking) to reveal long distance stratigraphic deformation, range gain corrections to give proper weight to signal amplitudes, and GPS corrections to adjust the records for the present ice sheet topography. Near surface stratigraphy will allow topographic and ice movement effects to be separated. This work is critical to the success of the U.S.-ITASE program.", "east": -90.0, "geometry": "POINT(-112.5 -82.5)", "instruments": "EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e PROFILERS/SOUNDERS \u003e RADAR SOUNDERS \u003e RADAR; EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e PROFILERS/SOUNDERS \u003e RADAR SOUNDERS \u003e RADAR ECHO SOUNDERS; EARTH REMOTE SENSING INSTRUMENTS \u003e ACTIVE REMOTE SENSING \u003e PROFILERS/SOUNDERS \u003e RADAR SOUNDERS \u003e GPR", "is_usap_dc": true, "keywords": "Ice; Radar Echo Sounder; USAP-DC; US ITASE; Ice Cover; West Antarctic Ice Sheet; Snow Accumulation; CRREL; Antarctic Ice Sheet; Radar; Ice Surveys; ITASE; Ice Sheet; Radar Echo Sounding; GROUND-BASED OBSERVATIONS; Ice Thickness; Mass Balance", "locations": "Antarctic Ice Sheet; West Antarctic Ice Sheet", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "paleo_time": null, "persons": "Spikes, Vandy Blue; Arcone, Steven; Kaspari, Susan; Hamilton, Gordon S.; Mayewski, Paul A.", "platforms": "LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e GROUND-BASED OBSERVATIONS", "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet", "uid": "p0000146", "west": -135.0}, {"awards": "0088054 Goldstein, Steven", "bounds_geometry": "POLYGON((-180 -39.57,-144 -39.57,-108 -39.57,-72 -39.57,-36 -39.57,0 -39.57,36 -39.57,72 -39.57,108 -39.57,144 -39.57,180 -39.57,180 -42.967,180 -46.364,180 -49.761,180 -53.158,180 -56.555,180 -59.952,180 -63.349,180 -66.746,180 -70.143,180 -73.54,144 -73.54,108 -73.54,72 -73.54,36 -73.54,0 -73.54,-36 -73.54,-72 -73.54,-108 -73.54,-144 -73.54,-180 -73.54,-180 -70.143,-180 -66.746,-180 -63.349,-180 -59.952,-180 -56.555,-180 -53.158,-180 -49.761,-180 -46.364,-180 -42.967,-180 -39.57))", "dataset_titles": null, "datasets": null, "date_created": "Tue, 26 Apr 2005 00:00:00 GMT", "description": "This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports a project to investigate the sediment core from the Southern Ocean for paleoenvironmental research. The polar regions are susceptible to the largest changes in climate and are among the least accessible places on Earth. Current concern about the instability of the West Antarctic Ice Sheet has heightened awareness of the vulnerability of polar regions. This proposal seeks to gain a basic understanding of the isotopic characteristics of terrigenous sediment sources derived from Antarctica in the Holocene and Last Glacial Maximum, and their dispersal into the Southern Ocean. Terrigenous clastic sediments are brought to the ocean from continental sources via rivers, ice and wind, and distributed within the ocean by surface and deep currents. At present there are virtually no isotopic data on circumpolar detritus, save a few strontium (Sr) isotopic ratios in the Atlantic sector. This project will fill part of this gap. From the large range in geological ages of crustal provinces of Antarctica, we would predict that there are large isotopic differences in detritus around the continent. The main objectives are to (1) characterize the strontium-neodymium-lead-argon (Sr-Nd-Pb-Ar) isotope compositions of sediment sources derived from Antarctica, (2) to identify the composition and source ages of major ice rafted detritus (IRD) contributions by analyzing individual grains of hornblende and feldspar in conjunction with bulk isotopic analysis, and (3) track sediment dispersal into the Antarctic Circumpolar Current (ACC) during the Holocene and Last Glacial Maximum.\u003cbr/\u003e\u003cbr/\u003eBecause of the paucity of circumpolar data, this research necessarily has a large exploratory component. Consequently, it will provide a basic database for future studies. Nevertheless there are important hypothesis-driven questions that will be addressed in this primary pass. Can lessons learned in North Atlantic IRD studies be applied toward understanding the history of Antarctic ice sheets? Can the large geological variability around the Antarctic margin be treated as a series of natural tracer injections into the ACC, and thus characterize its trajectory, speed, and interaction with other current systems today and in the past? The proposed study is motivated by an exciting set of results from the South Atlantic, showing that detrital Sr isotope ratios are a sensitive current tracer in that region. This research should serve a basic need across many Earth Science disciplines if the use of long-lived radiogenic isotopes (Sr-Nd-Pb-Ar) as tracers of marine sediment sources is successful in elucidating processes related to changing climatic conditions. The results of this study will fill a basic gap in our knowledge of an important region of the Earth. At the same time, it will provide an essential basis for attempting reconstruction of the ACC during the LGM, as well as for future studies of Antarctic geology, ice sheet history, and the Southern Ocean circulation.", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": null, "is_usap_dc": false, "keywords": "Not provided", "locations": null, "north": -39.57, "nsf_funding_programs": "Antarctic Earth Sciences", "paleo_time": null, "persons": "Roy, Martin; Hemming, Sidney R.; Goldstein, Steven L.; Van De Flierdt, Christina-Maria", "platforms": "Not provided", "repositories": null, "science_programs": null, "south": -73.54, "title": "Establishing the Pattern of Holocene-LGM Changes in Sediment Contributions from Antarctica to the Southern Ocean", "uid": "p0000724", "west": -180.0}, {"awards": "0537827 Lazzara, Matthew", "bounds_geometry": "POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))", "dataset_titles": "Access Antarctic NOAA Polar Orbiting AVHRR HRPT GAC and LAC images.; Access Arrival Heights Meteorological Observations; Access Building 189 Meteorological Observations; Access Building 69 Meteorological Observations; Access Building 71 Meteorological Observations; Access McMurdo Meteorological Observations; Access Neumayer Meteorological Observations; Access Palmer Meteorological Observations; Access South Pole Meteorological Observations", "datasets": [{"dataset_uid": "001296", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Neumayer Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/neumayer/"}, {"dataset_uid": "001293", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Building 69 Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/mcmurdo/building69/"}, {"dataset_uid": "001297", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Palmer Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/palmer/observations/"}, {"dataset_uid": "001298", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access South Pole Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/southpole/surface_observations/"}, {"dataset_uid": "001292", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Building 189 Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/mcmurdo/building189/"}, {"dataset_uid": "001291", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Arrival Heights Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/mcmurdo/arrivalheights/"}, {"dataset_uid": "001294", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Building 71 Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/mcmurdo/building71/"}, {"dataset_uid": "001295", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access McMurdo Meteorological Observations", "url": "ftp://amrc.ssec.wisc.edu/pub/mcmurdo/climatology/"}, {"dataset_uid": "001287", "doi": "", "keywords": null, "people": null, "repository": "AMRDC", "science_program": null, "title": "Access Antarctic NOAA Polar Orbiting AVHRR HRPT GAC and LAC images.", "url": "ftp://amrc.ssec.wisc.edu"}], "date_created": "Thu, 12 Oct 2000 00:00:00 GMT", "description": "This proposed work is the continued operation of the Antarctic Meteorological Research Center (AMRC) for three years through 2009. AMRC is a meteorological data acquisition and management system with nodes at McMurdo Station and at the University of Wisconsin, Madison. The system is a resource and archive for meteorological research and a test bed for improving operational synoptic forecasting. Its basis is a computer-based system for organizing, manipulating, and integrating antarctic environmental data, developed by the University of Wisconsin. It captures the flow of meteorological information from polar orbiting satellites, automatic weather stations, operational station synoptic observations, and research project data, producing a mosaic of antarctic satellite images on an operational basis. It also receives environmental data products, such as weather forecasts, from outside Antarctica, and acts as a repository for existing archived databases. The AMRC provides customized weather and climate information for a variety of antarctic users, including aircraft and ship operations of the US Antarctic Program. Currently the AMRC produces the Antarctic Composite Infrared Image, a mosaic of images from four geostationary and three polar-orbiting satellites, which is used for both forecasting and research purposes. In the current time period, AMRC will develop a data exploration/classification toolkit based on self-organizing maps to produce a new, satellite-based antarctic cloud climatology for regions. The AMRC will also be at the center of the evolving Antarctic-Internet Data Distribution (Antarctic-IDD) system, a reliable and formalized means of sharing and distributing Antarctic data among operational and research users. \u003cbr/\u003e***", "east": 180.0, "geometry": "POINT(0 -89.999)", "instruments": "EARTH REMOTE SENSING INSTRUMENTS \u003e PASSIVE REMOTE SENSING \u003e SPECTROMETERS/RADIOMETERS \u003e IMAGING SPECTROMETERS/RADIOMETERS \u003e AVHRR", "is_usap_dc": false, "keywords": "NOAA-14; FIXED OBSERVATION STATIONS; Antarctica; Not provided; Satellite Imagery; NOAA-15; Noaa Avhrr Lac; NOAA-12; Observation Data", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "paleo_time": null, "persons": "Lazzara, Matthew; Costanza, Carol; Snarski, Joey", "platforms": "LAND-BASED PLATFORMS \u003e PERMANENT LAND SITES \u003e FIXED OBSERVATION STATIONS; Not provided; SPACE-BASED PLATFORMS \u003e EARTH OBSERVATION SATELLITES \u003e POLAR ORBITING ENVIRONMENTAL SATELLITES (POES) \u003e NOAA-12; SPACE-BASED PLATFORMS \u003e EARTH OBSERVATION SATELLITES \u003e POLAR ORBITING ENVIRONMENTAL SATELLITES (POES) \u003e NOAA-14; SPACE-BASED PLATFORMS \u003e EARTH OBSERVATION SATELLITES \u003e POLAR ORBITING ENVIRONMENTAL SATELLITES (POES) \u003e NOAA-15", "repo": "AMRDC", "repositories": "AMRDC", "science_programs": null, "south": -90.0, "title": "Collaborative Research: Antarctic Meteorological Research Center (2006-2009)", "uid": "p0000280", "west": -180.0}]

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