[ { "dataset_uid": "601348", "doi": "10.1594/IEDA/321466", "landing_page": "https://www.usap-dc.org/view/dataset/601348", "title": "Processed CTD Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203", "creator": "Huber, Bruce; Gordon, Arnold", "abstract": "This data set was acquired with a Sea-Bird SBE 9Plus CTD during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement, Salinity, and Temperature data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "release_date": null, "keywords": "Antarctica; Antarctic Peninsula; CTD; CTD Data; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Antarctic Peninsula; Antarctica; Larsen Ice Shelf", "persons": "Huber, Bruce; Gordon, Arnold", "projects": [ { "proj_uid": "p0000101", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "landing_page": "https://www.usap-dc.org/view/project/p0000101" }, { "proj_uid": "p0000495", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase", "landing_page": "https://www.usap-dc.org/view/project/p0000495" } ], "awards": "1141890 Huber, Bruce; 0732651 Gordon, Arnold", "north": "-60.0", "south": "-65.0", "east": "-55.0", "west": "-63.0", "science_programs": null, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "replaces": null, "replaced_by": null, "language_id": "English", "version": "1", "date_created": "Thu, 25 Jun 2020 00:00:00 -0000", "date_modified": "Thu, 25 Jun 2020 00:00:00 -0000" }, { "dataset_uid": "601347", "doi": "10.1594/IEDA/321465", "landing_page": "https://www.usap-dc.org/view/dataset/601347", "title": "Processed ship-based LADCP Sonar Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203", "creator": "Huber, Bruce; Gordon, Arnold", "abstract": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "release_date": null, "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer", "locations": "Larsen Ice Shelf; Antarctic Peninsula; Antarctica", "persons": "Huber, Bruce; Gordon, Arnold", "projects": [ { "proj_uid": "p0000495", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase", "landing_page": "https://www.usap-dc.org/view/project/p0000495" }, { "proj_uid": "p0000101", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "landing_page": "https://www.usap-dc.org/view/project/p0000101" } ], "awards": "1141890 Huber, Bruce; 0732651 Gordon, Arnold", "north": "-61.0", "south": "-65.4", "east": "-55.0", "west": "-62.0", "science_programs": null, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "replaces": null, "replaced_by": null, "language_id": "English", "version": "1", "date_created": "Thu, 25 Jun 2020 00:00:00 -0000", "date_modified": "Thu, 25 Jun 2020 00:00:00 -0000" }, { "dataset_uid": "601304", "doi": "10.1594/IEDA/324315", "landing_page": "https://www.usap-dc.org/view/dataset/601304", "title": "Species Abundance Data from the Larsen Ice Shelf Ice acquired during R/V Nathaniel B. Palmer expedition NBP1203", "creator": "Smith, Craig", "abstract": "Species Abundance Data from the Larsen Ice Shelf Ice acquired during R/V Nathaniel B. Palmer expedition NBP1203. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems (LARISSA); and Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change.", "release_date": null, "keywords": "Antarctica; Antarctic Peninsula; Biota; Box Corer; LARISSA; Larsen Ice Shelf; Macrofauna; Megafauna; NBP1203; Oceans; R/v Nathaniel B. Palmer; Seafloor Sampling; Species Abundance", "locations": "Larsen Ice Shelf; Antarctic Peninsula; Antarctica", "persons": "Smith, Craig", "projects": [ { "proj_uid": "p0010135", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems.", "landing_page": "https://www.usap-dc.org/view/project/p0010135" }, { "proj_uid": "p0000382", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "landing_page": "https://www.usap-dc.org/view/project/p0000382" } ], "awards": "1341669 DeMaster, David; 0732711 Smith, Craig", "north": "-62.0", "south": "-65.4", "east": "-55.0", "west": "-61.0", "science_programs": "LARISSA", "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Organisms and Ecosystems", "replaces": null, "replaced_by": null, "language_id": "English", "version": "1", "date_created": "Fri, 01 May 2020 00:00:00 -0000", "date_modified": "Fri, 01 May 2020 00:00:00 -0000" }, { "dataset_uid": "601211", "doi": "10.15784/601211", "landing_page": "https://www.usap-dc.org/view/dataset/601211", "title": "Easten Antarctic Peninsula Surface Sediment Diatom Data", "creator": "Leventer, Amy", "abstract": "Diatom data from eastern side of Antarctic Peninsula:\r\n\r\nThis file includes quantitative diatom data for surface samples collected on numerous cruises to the eastern side of the Antarctic Peninsula, including NBP0003, NBP0107, LMG0502, NBP0603, and NBP1203. Samples were collected using a variety of tools including Smith-McIntyre Grab, Kasten Core and Jumbo Kasten Core. These data were generated by Amy Leventer (aleventer@colgate.edu) and undergraduate students at Colgate University. All questions regarding the specifics of these data should be directed to Amy Leventer. \r\n\r\nQuantitative diatom slides were prepared according to the settling technique of Scherer (1995). Cover slips were adhered to the slides using Norland Optical Adhesive #61. Slides were observed under Olympus CX31, BX50 and BX60, and Zeiss Primo Star light microscopes, using a 100X oil immersion objective for a total magnification of 1000X. A minimum of 400 valves or 10 transects was counted for each slide, depending on the absolute diatom abundance. Valves were only counted if >50% complete. Diatoms were identified to species level when possible (Crosta et al., 2005; Armand et al., 2005; Cefarelli et al., 2010).\r\n\r\nArmand, L.K., X. Crosta, O. Romero, J. J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments: 1. Sea ice related species, Paleogeography, Paleoclimatology, Paleoecology, 223, 93-126. \r\n\r\nCefarelli, A.O., M. E. Ferrario, G. O. Almandoz, A. G. Atencio, R. Akselman, M. Vernet (2010), Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance, Polar Biology, 33(2), 1463-1484. \r\n\r\nCrosta, X., O. Romero, L. K. Armand, J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species, Palaeogeography, Palaeoclimatology, Palaeoecology, 223, 66-92. \r\n\r\nScherer, R. P., A new method for the determination of absolute abundance of diatoms and other silt-sized sedimentary particles, J. Paleolimnol., 12, 171\u2013178, 1995.\r\n", "release_date": null, "keywords": "Antarctica; Antarctic Peninsula; Benthos; Biota; Diatom; Geology/Geophysics - Other; LMG0502; Marine Geoscience; Marine Sediments; Microscope; NBP0003; NBP0107; NBP0603; NBP1203; R/v Nathaniel B. Palmer; Surface Sediment", "locations": "Antarctica; Antarctic Peninsula", "persons": "Leventer, Amy", "projects": [ { "proj_uid": "p0000101", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "landing_page": "https://www.usap-dc.org/view/project/p0000101" } ], "awards": "0732625 Leventer, Amy; 9714371 Leventer, Amy", "north": "-63.0", "south": "-67.0", "east": "-55.0", "west": "-64.0", "science_programs": "LARISSA", "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "replaces": null, "replaced_by": null, "language_id": "English", "version": "1", "date_created": "Mon, 16 Sep 2019 00:00:00 -0000", "date_modified": "Mon, 16 Sep 2019 00:00:00 -0000" }, { "dataset_uid": "600073", "doi": "10.15784/600073", "landing_page": "https://www.usap-dc.org/view/dataset/600073", "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Marine Ecosystems", "creator": "Vernet, Maria", "abstract": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems. A profound transformation in ecosystem structure and function is occurring in coastal waters of the western Weddell Sea, with the collapse of the Larsen B ice shelf. This transformation appears to be yielding a redistribution of energy flow between chemoautotrophic and photosynthetic production, and to be causing the rapid demise of the extraordinary seep ecosystem discovered beneath the ice shelf. This event provides an ideal opportunity to examine fundamental aspects of ecosystem transition associated with climate change. We propose to test the following hypotheses to elucidate the transformations occurring in marine ecosystems as a consequence of the Larsen B collapse: (1) The biogeographic isolation and sub-ice shelf setting of the Larsen B seep has led to novel habitat characteristics, chemoautotrophically dependent taxa and functional adaptations. (2) Benthic communities beneath the former Larsen B ice shelf are fundamentally different from assemblages at similar depths in the Weddell sea-ice zone, and resemble oligotrophic deep-sea communities. Larsen B assemblages are undergoing rapid change. (3) The previously dark, oligotrophic waters of the Larsen B embayment now support a thriving phototrophic community, with production rates and phytoplankton composition similar to other productive areas of the Weddell Sea. To document rapid changes occurring in the Larsen B ecosystem, we will use a remotely operated vehicle, shipboard samplers, and moored sediment traps. We will characterize microbial, macrofaunal and megafaunal components of the seep community; evaluate patterns of surface productivity, export flux, and benthic faunal composition in areas previously covered by the ice shelf, and compare these areas to the open sea-ice zone. These changes will be placed within the geological, glaciological and climatological context that led to ice-shelf retreat, through companion research projects funded in concert with this effort. Together these projects will help predict the likely consequences of ice-shelf collapse to marine ecosystems in other regions of Antarctica vulnerable to climate change. The research features international collaborators from Argentina, Belgium, Canada, Germany, Spain and the United Kingdom. The broader impacts include participation of a science writer; broadcast of science segments by members of the Jim Lehrer News Hour (Public Broadcasting System); material for summer courses in environmental change; mentoring of graduate students and postdoctoral fellows; and showcasing scientific activities and findings to students and public through podcasts.\n", "release_date": null, "keywords": "Antarctica; Antarctic Peninsula; Araon1304; Biota; LARISSA; Larsen B Ice Shelf; NBP1001; NBP1203; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "locations": "Antarctic Peninsula; Antarctica; Southern Ocean; Larsen B Ice Shelf; Weddell Sea", "persons": "Vernet, Maria", "projects": [ { "proj_uid": "p0000101", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "landing_page": "https://www.usap-dc.org/view/project/p0000101" } ], "awards": "0732983 Vernet, Maria", "north": "-62.0", "south": "-70.0", "east": "-59.0", "west": "-66.0", "science_programs": "LARISSA", "nsf_funding_programs": null, "replaces": null, "replaced_by": null, "language_id": "English", "version": "1", "date_created": "Wed, 01 Jan 2014 00:00:00 -0000", "date_modified": "Wed, 01 Jan 2014 00:00:00 -0000" } ]