USAP-DC

{"dp_type": "Dataset", "free_text": "Helicopter"}

[{"awards": "2114454 Greenbaum, Jamin", "bounds_geometry": ["POLYGON((-118.2 -72.2,-116.98 -72.2,-115.76 -72.2,-114.54 -72.2,-113.32000000000001 -72.2,-112.1 -72.2,-110.88 -72.2,-109.66 -72.2,-108.44 -72.2,-107.22 -72.2,-106 -72.2,-106 -72.53,-106 -72.86,-106 -73.19,-106 -73.52,-106 -73.85,-106 -74.18,-106 -74.51,-106 -74.84,-106 -75.17,-106 -75.5,-107.22 -75.5,-108.44 -75.5,-109.66 -75.5,-110.88 -75.5,-112.1 -75.5,-113.32000000000001 -75.5,-114.54 -75.5,-115.76 -75.5,-116.98 -75.5,-118.2 -75.5,-118.2 -75.17,-118.2 -74.84,-118.2 -74.51,-118.2 -74.18,-118.2 -73.85,-118.2 -73.52,-118.2 -73.19,-118.2 -72.86,-118.2 -72.53,-118.2 -72.2))"], "date_created": "Tue, 11 Feb 2025 00:00:00 GMT", "description": "This dataset contains ocean profile measurements from Airborne Expendable Conductivity, Temperature, Depth (AXCTD) and Airborne Expendable Bathy-Thermograph (AXBT) sensors deployed by helicopter and from the RV Araon research icebreaker. AXCTDs were deployed around the Thwaites Glacier Tongue while the AXBTs were deployed near the Dotson Ice Shelf and along a northbound transect at the end of the field season. The profiles were acquired in February 2022.", "east": -106.0, "geometry": ["POINT(-112.1 -73.85)"], "keywords": "Amundsen Sea; Antarctica; Araon; AXBT; AXCTD; Cryosphere; CTD; Helicopter; Icebreaker; Oceans; Thwaites Glacier; XBT", "locations": "Antarctica; Amundsen Sea; Thwaites Glacier", "north": -72.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Greenbaum, Jamin; Greenbaum, Jamin Stevens", "project_titles": "RAPID: International Collaborative Airborne Sensor Deployments near Antarctic Ice Shelves", "projects": [{"proj_uid": "p0010497", "repository": "USAP-DC", "title": "RAPID: International Collaborative Airborne Sensor Deployments near Antarctic Ice Shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.5, "title": "AXCTD and AXBT Profiles from the Amundsen Sea", "uid": "601894", "west": -118.2}, {"awards": "1644196 Cziko, Paul", "bounds_geometry": ["POINT(166.6645 -77.851)"], "date_created": "Tue, 29 Dec 2020 00:00:00 GMT", "description": "Broadband underwater acoustic recordings from the McMurdo Oceanographic Observatory mooring near the seaward terminus of the McMurdo Station seawater intake jetty. An omnidirectional Ocean Sonics icListen hydrophone (SB2-ETH, SN 1713) recorded continuously at 512 kilosamples/second (256 kHz Nyquist frequency; 24 bit) for 2 years. The hydrophone was mounted vertically on a steel strut (insulated with rubber sheet) at about 70 cm above the mud/gravel seabed at 21m deep, with the sloping 45\u00b0 rubble face of the jetty just behind the hydrophone. Temporal coverage is \u003e90%, with gaps and truncated files arising due to network and power outages and software bugs. The audio recordings are 10 minute WAV files, compressed using the lossless FLAC code (Free Lossless Audio Codec, xiph.org; about 33MB of data/minute compressed; 100MB/min uncompressed). The hydrophone was under thick (to 3 m) sea ice cover for the majority of the dataset. The majority of the recorded biological sounds were produced by Weddell seals. Orca were present intermittently (~10 days total) in January-March in both summers. Known non-biological sounds include irregular low-intensity, broad-spectrum clicks and cracks from the sea ice cover, occasional wind noise, a 1.5-s gurgle with components to 200kHz every 90s from the CTD\u2019s pump, a broad-spectrum mechanical sound for 3 min every 4 h from the observatory\u0027s underwater camera cleaning system, low-intensity whines (about 18, 58, 83, and 130 kHz, though variable over the dataset) thought to be from the station seawater pumps (\u003e100 m away within the jetty\u2019s well casing), and intermittent noises from tracked-vehicles and helicopters (September\u2013February), SCUBA divers (October\u2013December), and ships (January). Given hosting limitations, only every 6th file (roughly 10min/hour) has been archived here. Additional data can be obtained by contacting the primary author of the dataset, who will maintain it for as long as possible. Audio spectrogram images (PNGs) at three frequency ranges (three stacked panels per image, upper limits of 2.5, 25, and 256 kHz) from the entire dataset (all data, not subsampled) are also archived separately.", "east": 166.6645, "geometry": ["POINT(166.6645 -77.851)"], "keywords": "Antarctica; Bioacoustics; Biota; Hydroacoustics; Killer Whales; Leptonychotes Weddellii; McMurdo Sound; Oceans; Orcinus Orca; Sea Ice; Weddell Seal; Whales", "locations": "McMurdo Sound; Antarctica", "north": -77.851, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Cziko, Paul", "project_titles": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010147", "repository": "USAP-DC", "title": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.851, "title": "Long-term broadband underwater acoustic recordings from McMurdo Sound, Antarctica (2017-2019)", "uid": "601416", "west": 166.6645}, {"awards": "1644187 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((161 -76.9,161.75 -76.9,162.5 -76.9,163.25 -76.9,164 -76.9,164.75 -76.9,165.5 -76.9,166.25 -76.9,167 -76.9,167.75 -76.9,168.5 -76.9,168.5 -77.04,168.5 -77.18,168.5 -77.32,168.5 -77.46,168.5 -77.6,168.5 -77.74,168.5 -77.88,168.5 -78.02,168.5 -78.16,168.5 -78.3,167.75 -78.3,167 -78.3,166.25 -78.3,165.5 -78.3,164.75 -78.3,164 -78.3,163.25 -78.3,162.5 -78.3,161.75 -78.3,161 -78.3,161 -78.16,161 -78.02,161 -77.88,161 -77.74,161 -77.6,161 -77.46,161 -77.32,161 -77.18,161 -77.04,161 -76.9))"], "date_created": "Sat, 12 Sep 2020 00:00:00 GMT", "description": "The ANTAEM survey was carried out in the period November 12th to 28th, 2018, with the SkyTEM 312 system. Twenty-one missions (flights) were conducted over 11 production days of helicopter service, resulting in a total of approximately ~3400 line km of data. The SkyTEM system records data from take-off until landing resulting in multiple lines converging to the landing pads in McMurdo and at Marble Point. The production without overlapping lines adds up to approximately 2900 line km. The flight speed was approximately 120 km/h at a target flight altitude of ~50 m (sensor height), but the actual sensor height varies depending on the terrain. The surveys were carried out with a Bell 212 helicopter, which carried the SkyTEM sensor as a sling load. The SkyTEM system was configured in a standard two-moment setup (low moment, LM and high moment, HM). Areas with extremely resistive dry and/or frozen sediment/bedrock, and glacier ice often produce EM-signals with amplitudes below the detection level of the system. Data from these low signal environments cannot be inverted into resistivity models. Data with strong induced polarization effects cannot be inverted for resistivity either. These data were discharged in this standard data delivery. \r\n The EM-data and inversion result (resistivity models) are delivered in the SkyTEM2018_dat.xyz and SkyTEM2018_inv.xyz files respectably. The RECORD number in the two files links data and model together. EM-data and data uncertainty for data entering inversion. Info stated in file Header: NAN value, Data unit, Coordinate system, Gate times. The SkyTEM system uses at High-Low moment data recording cycle, therefore only a subset of the total 40 time gates are preset for each moment. The standard lateral constraints inversion (LCI), delivered in the SkyTEM2018_inv.xyz file, was carried out with a smooth 30 layered resistivity model discretized to a depth of 500 m. A depth of investigation (DOI) was estimated for each resistivity model.\r\n", "east": 168.5, "geometry": ["POINT(164.75 -77.6)"], "keywords": "Antarctica; Dry Valleys; Hydrology; Ice Shelf; McMurdo; Permafrost", "locations": "McMurdo; Antarctica; Dry Valleys", "north": -76.9, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Tulaczyk, Slawek", "project_titles": "Collaborative Research: Antarctic Airborne ElectroMagnetics (ANTAEM) - Revealing Subsurface Water in Coastal Antarctica", "projects": [{"proj_uid": "p0010129", "repository": "USAP-DC", "title": "Collaborative Research: Antarctic Airborne ElectroMagnetics (ANTAEM) - Revealing Subsurface Water in Coastal Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.3, "title": "ANTAEM project airborne EM resistivity data from McMurdo Region", "uid": "601373", "west": 161.0}, {"awards": "1341612 Bowser, Samuel", "bounds_geometry": ["POINT(163.5117 -77.57623)"], "date_created": "Thu, 05 Dec 2019 00:00:00 GMT", "description": "Photographs taken from helo operating at 500 ft of the shoreline bounding Explorers Cove in late January, illustrating typical sea ice conditions, extent of shoreline moat, ephemeral snow melt input, nearshore small ponds and tide pools, Commonwealth and Wales Glacier deltas, evaporite deposits, and landslides along the northern/northeastern slopes of Mount Barnes.", "east": 163.5117, "geometry": ["POINT(163.5117 -77.57623)"], "keywords": "Aerial Imagery; Antarctica; Camera; Delta; Freshwater; Helicopter; Moat; Shoreline Survey; Small Ponds; Snow Melt; Tide Pools", "locations": "Antarctica", "north": -77.57623, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bowser, Samuel; Alexander, Steve", "project_titles": "Assembling and Mining the Genomes of Giant Antarctic Foraminifera", "projects": [{"proj_uid": "p0000004", "repository": "USAP-DC", "title": "Assembling and Mining the Genomes of Giant Antarctic Foraminifera"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.57623, "title": "Aerial survey of Explorers Cove shoreline, late January 2005", "uid": "601229", "west": 163.5117}, {"awards": "1344349 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((161.6 -77.4,162.14 -77.4,162.68 -77.4,163.22 -77.4,163.76 -77.4,164.3 -77.4,164.84 -77.4,165.38 -77.4,165.92 -77.4,166.46 -77.4,167 -77.4,167 -77.437,167 -77.474,167 -77.511,167 -77.548,167 -77.585,167 -77.622,167 -77.659,167 -77.696,167 -77.733,167 -77.77,166.46 -77.77,165.92 -77.77,165.38 -77.77,164.84 -77.77,164.3 -77.77,163.76 -77.77,163.22 -77.77,162.68 -77.77,162.14 -77.77,161.6 -77.77,161.6 -77.733,161.6 -77.696,161.6 -77.659,161.6 -77.622,161.6 -77.585,161.6 -77.548,161.6 -77.511,161.6 -77.474,161.6 -77.437,161.6 -77.4))"], "date_created": "Tue, 05 Dec 2017 00:00:00 GMT", "description": "This dataset contains raw TEM data and inverted electrical resistivity data. The raw data were collected using a helicopter-borne sensor in November/December 2011 in collaboration with Drs. Esben Auken (University of Aarhus), Jill Mikucki (University of Tennessee - Knoxville) and Ross Virginia (Dartmouth College). Details on data collection and processing are provided in Mikucki et al. (2015) and Foley et al. (2015). We request that these two references be cited in any future publications based on the archived dataset. ", "east": 167.0, "geometry": ["POINT(164.3 -77.585)"], "keywords": "Antarctica; Dry Valleys; Electromagnetic Data; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; McMurdo", "locations": "Dry Valleys; McMurdo; Antarctica", "north": -77.4, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Earth Sciences", "persons": "Tulaczyk, Slawek", "project_titles": "Collaborative Research: EAGER: Processing, Interpretation and Dissemination of the Proof-of-Concept Transient Electromagnetic Survey of the McMurdo Dry Valleys Region", "projects": [{"proj_uid": "p0000329", "repository": "USAP-DC", "title": "Collaborative Research: EAGER: Processing, Interpretation and Dissemination of the Proof-of-Concept Transient Electromagnetic Survey of the McMurdo Dry Valleys Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.77, "title": "2011 Time-domain ElectroMagnetics data for McMurdo Dry Valleys", "uid": "601071", "west": 161.6}, {"awards": "0732655 Mosley-Thompson, Ellen", "bounds_geometry": ["POLYGON((-63 -60,-62.6 -60,-62.2 -60,-61.8 -60,-61.4 -60,-61 -60,-60.6 -60,-60.2 -60,-59.8 -60,-59.4 -60,-59 -60,-59 -60.5,-59 -61,-59 -61.5,-59 -62,-59 -62.5,-59 -63,-59 -63.5,-59 -64,-59 -64.5,-59 -65,-59.4 -65,-59.8 -65,-60.2 -65,-60.6 -65,-61 -65,-61.4 -65,-61.8 -65,-62.2 -65,-62.6 -65,-63 -65,-63 -64.5,-63 -64,-63 -63.5,-63 -63,-63 -62.5,-63 -62,-63 -61.5,-63 -61,-63 -60.5,-63 -60))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Like no other region on Earth, the northern Antarctic Peninsula represents a spectacular natural laboratory of climate change and provides the opportunity to study the record of past climate and ecological shifts alongside the present-day changes in one of the most rapidly warming regions on Earth. This award supported the cryospheric and oceanographic components of an integrated multi-disciplinary program to address these rapid and fundamental changes now taking place in Antarctic Peninsula (AP). By making use of a marine research platform (the RV NB Palmer and on-board helicopters) and additional logistical support from the Argentine Antarctic program, the project brought together glaciologists, oceanographers, marine geologists and biologists who have worked collaboratively to address fundamental interdisciplinary questions regarding climate change.", "east": -59.0, "geometry": ["POINT(-61 -62.5)"], "keywords": "Antarctica; Antarctic Peninsula; Bruce Plateau; Glaciology; Ice Core Records; Isotope; LARISSA; Paleoclimate; Sample/collection Description; Sample/Collection Description; Snow Accumulation", "locations": "Antarctica; Bruce Plateau; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": null, "persons": "Thompson, Lonnie G.; Mosley-Thompson, Ellen", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.0, "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Cryosphere and Oceans", "uid": "600167", "west": -63.0}]

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