[{"awards": "1743310 Kingslake, Jonathan", "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))"], "date_created": "Sat, 24 Oct 2020 00:00:00 GMT", "description": "This data set contains the results presented in Lai et al. (2020), including; the 125m-resolution fracture map, the spatial distribution of fracture depths and the required initial flaw size for hydrofracture, which is calculated using linear elastic fracture mechanics (LEFM) according to the ice-shelf stress fields and thickness. The dimensionless stress (Rxx_bar, defined in Lai et al. (2020)) governs how fractures behave. Using a dimensionless stress criteria we have determined which ice-shelf areas are vulnerable to hydrofracture if inundated with melt water (Rxx_bar \u003eRxx*_bar).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Computer Model; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Meltwater; Model Data", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lai, Ching-Yao", "project_titles": "Satellite observations and modelling of surface meltwater flow and its impact on ice shelves", "projects": [{"proj_uid": "p0010184", "repository": "USAP-DC", "title": "Satellite observations and modelling of surface meltwater flow and its impact on ice shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Vulnerability of Antarctica\u2019s ice shelves to meltwater-driven fracture", "uid": "601395", "west": -180.0}, {"awards": "1142646 Twickler, Mark; 1142517 Aydin, Murat; 1141839 Steig, Eric", "bounds_geometry": ["POINT(90 -90)"], "date_created": "Wed, 30 Oct 2019 00:00:00 GMT", "description": "Qualitative assessment of ice-core quality versus depth for the South Pole ice core SPC14. The depths and core quality ratings presented here are from the field observations made at South Pole, Antarctica, during the course of the drilling of the ice core and also from the lab observations at the NSF-Ice Core Facility in Lakewood, Colorado. Depths are in meters. Core quality ratings were defined are as follows. Excellent: 0\u20131 breaks/no fractures; Very Good: 0\u20132 breaks/90% no fractures; Good: 0\u20133 breaks/50% no fractures; Fair: \u003e10 cm without fractures; Poor: \u003e10 cm without through fractures; Very Poor: \u003c10 cm without through fractures.", "east": 90.0, "geometry": ["POINT(90 -90)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Depth; Ice Core Records; Snow/ice; Snow/Ice; SPICEcore", "locations": "Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Souney, Joseph Jr.; Twickler, Mark; Fegyveresi, John; Casey, Kimberly A.; Aydin, Murat; Steig, Eric J.; Nunn, Richard; Hargreaves, Geoff; Fudge, T. J.; Nicewonger, Melinda R.; Kahle, Emma", "project_titles": "Collaborative Research: A 1500m Ice Core from South Pole", "projects": [{"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole Ice Core (SPICEcore) SPC14 Core Quality Versus Depth", "uid": "601221", "west": 90.0}, {"awards": null, "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))"], "date_created": "Wed, 05 Sep 2018 00:00:00 GMT", "description": "In this data set we present observations of locations of surface crevasses in Antarctica collected from satellite images for the period between 2011 and 2015 for 46 ice shelf regions.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Crevasses; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Shelf; Satellite Remote Sensing", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Emetc, Veronika", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Location of surface crevasses in Antarctica", "uid": "601117", "west": -180.0}, {"awards": "0944266 Twickler, Mark; 0944348 Taylor, Kendrick", "bounds_geometry": ["POINT(-112.08 -79.46)"], "date_created": "Thu, 01 Jun 2017 00:00:00 GMT", "description": "Qualitative assessment of ice-core quality versus depth for the deep WAIS Divide WDC06A ice core. The depths and core quality ratings presented here are from the field observations made at WAIS Divide, Antarctica, during the course of the drilling of the ice core. Depths are in meters. Core quality ratings were defined are as follows. Excellent: -1 breaks/no fractures; Very Good: -2 breaks/90% no fractures; Good: -3 breaks/50% no fractures; Fair: \u003e10 cm without fractures; Poor: \u003e10 cm without through fractures; Very Poor: \u003c10 cm without through fractures.", "east": -112.08, "geometry": ["POINT(-112.08 -79.46)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide Ice Core", "locations": "Antarctica", "north": -79.46, "nsf_funding_programs": null, "persons": "Taylor, Kendrick C.; Souney, Joseph Jr.; Twickler, Mark", "project_titles": "Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide", "projects": [{"proj_uid": "p0000080", "repository": "USAP-DC", "title": "Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.46, "title": "WAIS Divide WDC06A Core Quality Versus Depth", "uid": "601030", "west": -112.08}, {"awards": "0125754 Hulbe, Christina; 0440670 Hulbe, Christina", "bounds_geometry": ["POLYGON((-86.557 -74.355,-80.5124 -74.355,-74.4678 -74.355,-68.4232 -74.355,-62.3786 -74.355,-56.334 -74.355,-50.2894 -74.355,-44.2448 -74.355,-38.2002 -74.355,-32.1556 -74.355,-26.111 -74.355,-26.111 -75.3874,-26.111 -76.4198,-26.111 -77.4522,-26.111 -78.4846,-26.111 -79.517,-26.111 -80.5494,-26.111 -81.5818,-26.111 -82.6142,-26.111 -83.6466,-26.111 -84.679,-32.1556 -84.679,-38.2002 -84.679,-44.2448 -84.679,-50.2894 -84.679,-56.334 -84.679,-62.3786 -84.679,-68.4232 -84.679,-74.4678 -84.679,-80.5124 -84.679,-86.557 -84.679,-86.557 -83.6466,-86.557 -82.6142,-86.557 -81.5818,-86.557 -80.5494,-86.557 -79.517,-86.557 -78.4846,-86.557 -77.4522,-86.557 -76.4198,-86.557 -75.3874,-86.557 -74.355))"], "date_created": "Fri, 15 Jul 2011 00:00:00 GMT", "description": "This data set provides a structural feature map of the Ronne Ice Shelf in Antarctica (also known as the Filchner-Ronne Ice Shelf). The map was developed as part of a project to study fracture propagation in the Ronne Ice Shelf, with special focus on the Evans Ice Stream. Features were digitized from the MODIS Mosaic of Antartica (MOA), a composite of individual Moderate Resolution Imaging Spectradiometer (MODIS) images taken between 20 November 2003 and 29 February 2004, with an effective resolution of 125 m. The data set includes estimates of the shelf boundary, including ice stream grounding zones, outlets of glaciers feeding the shelf, extents of islands and ice rises, and the location of the shelf front, and features observed within the shelf, including suture zones between ice streams, streaklines, fractures (crevasses and rifts), and fold-like features. Individual features can be extracted as a group of points and grouping is used to facilitate identification and plotting. \n\nData files are available via FTP in ASCII text (.txt) format. One image file, in Portable Document Format (.pdf), shows the data included in the dataset, plotted using MATLAB. The data set also provides a MATLAB script which can be used to plot the data.", "east": -26.111, "geometry": ["POINT(-56.334 -79.517)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MOA; MODIS; Ronne Ice Shelf", "locations": "Ronne Ice Shelf; Antarctica", "north": -74.355, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Ledoux, Christine", "project_titles": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "projects": [{"proj_uid": "p0000096", "repository": "USAP-DC", "title": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.679, "title": "MOA-derived Structural Feature Map of the Ronne Ice Shelf", "uid": "609497", "west": -86.557}]

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Dataset Title/Abstract/Map	NSF Award(s)	Date Created	PIs / Scientists	Project Links	Abstract	Bounds Geometry	Geometry	Selected	Visible
Vulnerability of Antarctica’s ice shelves to meltwater-driven fracture	1743310	2020-10-24	Lai, Ching-Yao	Satellite observations and modelling of surface meltwater flow and its impact on ice shelves	This data set contains the results presented in Lai et al. (2020), including; the 125m-resolution fracture map, the spatial distribution of fracture depths and the required initial flaw size for hydrofracture, which is calculated using linear elastic fracture mechanics (LEFM) according to the ice-shelf stress fields and thickness. The dimensionless stress (Rxx_bar, defined in Lai et al. (2020)) governs how fractures behave. Using a dimensionless stress criteria we have determined which ice-shelf areas are vulnerable to hydrofracture if inundated with melt water (Rxx_bar >Rxx*_bar).	["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))"]	["POINT(0 -89.999)"]	false	false
South Pole Ice Core (SPICEcore) SPC14 Core Quality Versus Depth	1142646 1142517 1141839	2019-10-30	Souney, Joseph Jr.; Twickler, Mark; Fegyveresi, John; Casey, Kimberly A.; Aydin, Murat; Steig, Eric J.; Nunn, Richard; Hargreaves, Geoff; Fudge, T. J.; Nicewonger, Melinda R.; Kahle, Emma	Collaborative Research: A 1500m Ice Core from South Pole	Qualitative assessment of ice-core quality versus depth for the South Pole ice core SPC14. The depths and core quality ratings presented here are from the field observations made at South Pole, Antarctica, during the course of the drilling of the ice core and also from the lab observations at the NSF-Ice Core Facility in Lakewood, Colorado. Depths are in meters. Core quality ratings were defined are as follows. Excellent: 0–1 breaks/no fractures; Very Good: 0–2 breaks/90% no fractures; Good: 0–3 breaks/50% no fractures; Fair: >10 cm without fractures; Poor: >10 cm without through fractures; Very Poor: <10 cm without through fractures.	["POINT(90 -90)"]	["POINT(90 -90)"]	false	false
Location of surface crevasses in Antarctica	None	2018-09-05	Emetc, Veronika	No project link provided	In this data set we present observations of locations of surface crevasses in Antarctica collected from satellite images for the period between 2011 and 2015 for 46 ice shelf regions.	["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))"]	["POINT(0 -89.999)"]	false	false
WAIS Divide WDC06A Core Quality Versus Depth	0944266 0944348	2017-06-01	Taylor, Kendrick C.; Souney, Joseph Jr.; Twickler, Mark	Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide	Qualitative assessment of ice-core quality versus depth for the deep WAIS Divide WDC06A ice core. The depths and core quality ratings presented here are from the field observations made at WAIS Divide, Antarctica, during the course of the drilling of the ice core. Depths are in meters. Core quality ratings were defined are as follows. Excellent: -1 breaks/no fractures; Very Good: -2 breaks/90% no fractures; Good: -3 breaks/50% no fractures; Fair: >10 cm without fractures; Poor: >10 cm without through fractures; Very Poor: <10 cm without through fractures.	["POINT(-112.08 -79.46)"]	["POINT(-112.08 -79.46)"]	false	false
MOA-derived Structural Feature Map of the Ronne Ice Shelf	0125754 0440670	2011-07-15	Hulbe, Christina; Ledoux, Christine	Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams	This data set provides a structural feature map of the Ronne Ice Shelf in Antarctica (also known as the Filchner-Ronne Ice Shelf). The map was developed as part of a project to study fracture propagation in the Ronne Ice Shelf, with special focus on the Evans Ice Stream. Features were digitized from the MODIS Mosaic of Antartica (MOA), a composite of individual Moderate Resolution Imaging Spectradiometer (MODIS) images taken between 20 November 2003 and 29 February 2004, with an effective resolution of 125 m. The data set includes estimates of the shelf boundary, including ice stream grounding zones, outlets of glaciers feeding the shelf, extents of islands and ice rises, and the location of the shelf front, and features observed within the shelf, including suture zones between ice streams, streaklines, fractures (crevasses and rifts), and fold-like features. Individual features can be extracted as a group of points and grouping is used to facilitate identification and plotting. Data files are available via FTP in ASCII text (.txt) format. One image file, in Portable Document Format (.pdf), shows the data included in the dataset, plotted using MATLAB. The data set also provides a MATLAB script which can be used to plot the data.	["POLYGON((-86.557 -74.355,-80.5124 -74.355,-74.4678 -74.355,-68.4232 -74.355,-62.3786 -74.355,-56.334 -74.355,-50.2894 -74.355,-44.2448 -74.355,-38.2002 -74.355,-32.1556 -74.355,-26.111 -74.355,-26.111 -75.3874,-26.111 -76.4198,-26.111 -77.4522,-26.111 -78.4846,-26.111 -79.517,-26.111 -80.5494,-26.111 -81.5818,-26.111 -82.6142,-26.111 -83.6466,-26.111 -84.679,-32.1556 -84.679,-38.2002 -84.679,-44.2448 -84.679,-50.2894 -84.679,-56.334 -84.679,-62.3786 -84.679,-68.4232 -84.679,-74.4678 -84.679,-80.5124 -84.679,-86.557 -84.679,-86.557 -83.6466,-86.557 -82.6142,-86.557 -81.5818,-86.557 -80.5494,-86.557 -79.517,-86.557 -78.4846,-86.557 -77.4522,-86.557 -76.4198,-86.557 -75.3874,-86.557 -74.355))"]	["POINT(-56.334 -79.517)"]	false	false

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