[{"awards": "0124014 Hall, Brenda", "bounds_geometry": ["POLYGON((163.053 -77.599,163.0741 -77.599,163.0952 -77.599,163.1163 -77.599,163.1374 -77.599,163.1585 -77.599,163.1796 -77.599,163.2007 -77.599,163.2218 -77.599,163.24290000000002 -77.599,163.264 -77.599,163.264 -77.60130000000001,163.264 -77.6036,163.264 -77.6059,163.264 -77.6082,163.264 -77.6105,163.264 -77.61280000000001,163.264 -77.6151,163.264 -77.6174,163.264 -77.6197,163.264 -77.622,163.24290000000002 -77.622,163.2218 -77.622,163.2007 -77.622,163.1796 -77.622,163.1585 -77.622,163.1374 -77.622,163.1163 -77.622,163.0952 -77.622,163.0741 -77.622,163.053 -77.622,163.053 -77.6197,163.053 -77.6174,163.053 -77.6151,163.053 -77.61280000000001,163.053 -77.6105,163.053 -77.6082,163.053 -77.6059,163.053 -77.6036,163.053 -77.60130000000001,163.053 -77.599))"], "date_created": "Wed, 09 Jul 2025 00:00:00 GMT", "description": "Physical and chemical properties of sediment cores from Lake Fryxell, Antarctica, provide a means of reconstructing past paleoenvironmental, water-level, and water-source changes over the last 60,000 years. This dataset includes stable isotope (O, C), radiocarbon, U-series, sedimentological, and loss-on-ignition data. The oxygen data relate primarily to water-source changes in the lake basin. Carbon (both stable and radioactive) isotopes are influenced heavily by lake stratification and depth of the photic zone. The data record surface level changes of Lake Fryxell over the past 60,000 years. In addition, the dated sediments constrain the Ross Sea ice sheet to east of (seaward of) the lake through that entire time. Finally, stable oxygen isotopes document water source changes switching from local alpine glacier meltwater to Ross Sea ice sheet meltwater and then back to local glacier meltwater.", "east": 163.264, "geometry": ["POINT(163.1585 -77.6105)"], "keywords": "Antarctica; Cryosphere; Dry Valleys; Lake Fryxell; Paleoclimate; Radiocarbon; Ross Ice Sheet; Ross Sea; Stable Isotopes; U", "locations": "Ross Sea; Lake Fryxell; Antarctica; Dry Valleys; Ross Ice Sheet", "north": -77.599, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hall, Brenda; Whittaker, Thomas", "project_titles": "Collaborative Research: Millennial-scale fluctuations of Dry Valleys lakes: Implications for regional climate variability and the interhemispheric (a)synchrony of climate change", "projects": [{"proj_uid": "p0010519", "repository": "USAP-DC", "title": "Collaborative Research: Millennial-scale fluctuations of Dry Valleys lakes: Implications for regional climate variability and the interhemispheric (a)synchrony of climate change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.622, "title": "Lake Fryxell Sediment Core Data", "uid": "601955", "west": 163.053}, {"awards": "1937748 Sumner, Dawn; 2336354 Juarez Rivera, Marisol", "bounds_geometry": ["POINT(163.1146 -77.6078)"], "date_created": "Wed, 02 Oct 2024 00:00:00 GMT", "description": "This dataset contains measurements of microbial mat thickness and number of laminae from Lake Fryxell, McMurdo Dry Valleys, Antarctica. Holes were melted through the ice cover of Lake Fryxell, which allowed tethered divers to collect benthic microbial mats (non-liftoff and liftoff) and microbial mats at the ice-water interface (float mats). Benthic non-liftoff and liftoff mat samples were collected from 4.3 m (n=4), 6.1 m (n=4), and 7.9 m (n=4) depths. Float mats were collected from the ice-water interface above 4.3 m (n=4), 6.1 m (n=4), and 7.9 m (n=5) depths. The mats were dissected along vertical cross sections in the field to measure mat thickness and number of laminae. Additional funding for this work was provided by the NASA Solar System Workings Program (Award #80NSSC22K0709).", "east": 163.1146, "geometry": ["POINT(163.1146 -77.6078)"], "keywords": "Antarctica; Cryosphere; Dry Valleys; Lake Fryxell; Laminae; Microbial Mat; Thickness", "locations": "Lake Fryxell; Dry Valleys; Antarctica; Antarctica", "north": -77.6078, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Integrated System Science", "persons": "Juarez Rivera, Marisol; Mackey, Tyler; Hawes, Ian; Paul, Ann; Sumner, Dawn", "project_titles": "RAPID: Is Biomass Mobilization at Ice-covered Lake Fryxell, Antarctica reaching a Critical Threshold?; Seasonal Primary Productivity and Nitrogen Cycling in Photosynthetic Mats, Lake Fryxell, McMurdo Dry Valleys", "projects": [{"proj_uid": "p0010467", "repository": "USAP-DC", "title": "RAPID: Is Biomass Mobilization at Ice-covered Lake Fryxell, Antarctica reaching a Critical Threshold?"}, {"proj_uid": "p0010219", "repository": "USAP-DC", "title": "Seasonal Primary Productivity and Nitrogen Cycling in Photosynthetic Mats, Lake Fryxell, McMurdo Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6078, "title": "Lake Fryxell 2022-2023 benthic microbial mat thickness and number of laminae", "uid": "601839", "west": 163.1146}, {"awards": "1245580 Castro, M. Clara", "bounds_geometry": ["POINT(163.1833 -77.6767)", "POINT(162.3667 -77.7166)"], "date_created": "Mon, 30 Jan 2017 00:00:00 GMT", "description": "The dataset consists of two CSV files that contain the concentrations and isotope ratios of noble gases extracted from water samples taken at two lakes, Lake Bonney and Lake Fryxell, using copper tubes. All of the samples for Lake Bonney were collected in January 2008. The samples for Lake Fryxell are split into two collection periods, namely January 2008 and January 2010.", "east": 163.1833, "geometry": ["POINT(163.1833 -77.6767)", "POINT(162.3667 -77.7166)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Critical Zone; Geochemistry; Noble Gas; Paleoclimate; Ross Ice Shelf; Ross Sea; Taylor Valley", "locations": "Taylor Valley; Ross Ice Shelf; Antarctica; Ross Sea", "north": -77.6767, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Castro, M. Clara", "project_titles": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases", "projects": [{"proj_uid": "p0000388", "repository": "USAP-DC", "title": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7166, "title": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases", "uid": "600389", "west": 162.3667}]

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Dataset Title/Abstract/Map	NSF Award(s)	Date Created	PIs / Scientists	Project Links	Abstract	Bounds Geometry	Geometry	Selected	Visible
Lake Fryxell Sediment Core Data	0124014	2025-07-09	Hall, Brenda; Whittaker, Thomas	Collaborative Research: Millennial-scale fluctuations of Dry Valleys lakes: Implications for regional climate variability and the interhemispheric (a)synchrony of climate change	Physical and chemical properties of sediment cores from Lake Fryxell, Antarctica, provide a means of reconstructing past paleoenvironmental, water-level, and water-source changes over the last 60,000 years. This dataset includes stable isotope (O, C), radiocarbon, U-series, sedimentological, and loss-on-ignition data. The oxygen data relate primarily to water-source changes in the lake basin. Carbon (both stable and radioactive) isotopes are influenced heavily by lake stratification and depth of the photic zone. The data record surface level changes of Lake Fryxell over the past 60,000 years. In addition, the dated sediments constrain the Ross Sea ice sheet to east of (seaward of) the lake through that entire time. Finally, stable oxygen isotopes document water source changes switching from local alpine glacier meltwater to Ross Sea ice sheet meltwater and then back to local glacier meltwater.	["POLYGON((163.053 -77.599,163.0741 -77.599,163.0952 -77.599,163.1163 -77.599,163.1374 -77.599,163.1585 -77.599,163.1796 -77.599,163.2007 -77.599,163.2218 -77.599,163.24290000000002 -77.599,163.264 -77.599,163.264 -77.60130000000001,163.264 -77.6036,163.264 -77.6059,163.264 -77.6082,163.264 -77.6105,163.264 -77.61280000000001,163.264 -77.6151,163.264 -77.6174,163.264 -77.6197,163.264 -77.622,163.24290000000002 -77.622,163.2218 -77.622,163.2007 -77.622,163.1796 -77.622,163.1585 -77.622,163.1374 -77.622,163.1163 -77.622,163.0952 -77.622,163.0741 -77.622,163.053 -77.622,163.053 -77.6197,163.053 -77.6174,163.053 -77.6151,163.053 -77.61280000000001,163.053 -77.6105,163.053 -77.6082,163.053 -77.6059,163.053 -77.6036,163.053 -77.60130000000001,163.053 -77.599))"]	["POINT(163.1585 -77.6105)"]	false	false
Lake Fryxell 2022-2023 benthic microbial mat thickness and number of laminae	1937748 2336354	2024-10-02	Juarez Rivera, Marisol; Mackey, Tyler; Hawes, Ian; Paul, Ann; Sumner, Dawn	RAPID: Is Biomass Mobilization at Ice-covered Lake Fryxell, Antarctica reaching a Critical Threshold? Seasonal Primary Productivity and Nitrogen Cycling in Photosynthetic Mats, Lake Fryxell, McMurdo Dry Valleys	This dataset contains measurements of microbial mat thickness and number of laminae from Lake Fryxell, McMurdo Dry Valleys, Antarctica. Holes were melted through the ice cover of Lake Fryxell, which allowed tethered divers to collect benthic microbial mats (non-liftoff and liftoff) and microbial mats at the ice-water interface (float mats). Benthic non-liftoff and liftoff mat samples were collected from 4.3 m (n=4), 6.1 m (n=4), and 7.9 m (n=4) depths. Float mats were collected from the ice-water interface above 4.3 m (n=4), 6.1 m (n=4), and 7.9 m (n=5) depths. The mats were dissected along vertical cross sections in the field to measure mat thickness and number of laminae. Additional funding for this work was provided by the NASA Solar System Workings Program (Award #80NSSC22K0709).	["POINT(163.1146 -77.6078)"]	["POINT(163.1146 -77.6078)"]	false	false
Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases	1245580	2017-01-30	Castro, M. Clara	Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases	The dataset consists of two CSV files that contain the concentrations and isotope ratios of noble gases extracted from water samples taken at two lakes, Lake Bonney and Lake Fryxell, using copper tubes. All of the samples for Lake Bonney were collected in January 2008. The samples for Lake Fryxell are split into two collection periods, namely January 2008 and January 2010.	["POINT(163.1833 -77.6767)", "POINT(162.3667 -77.7166)"]	["POINT(163.1833 -77.6767)", "POINT(162.3667 -77.7166)"]	false	false

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