USAP-DC

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{"@context": "https://schema.org/", "@type": "Dataset", "@id": "https://www.usap-dc.org/view/dataset/602084", "additionalType": ["geolink:Dataset", "vivo:Dataset"], "name": "Fracture traces of the \"Daggers\" on Thwaites Eastern Ice Shelf (2016-2026)", "description": "This dataset includes a shapefiles of traces of a set of fractures extending from the pinning ridge on the Thwaites Eastern Ice Shelf in West Antarctica (the \"Daggers\"). Fractures were manually-digitized as line features by two independent analysts (shapefiles corresponding to \"MS\" and \"ZB\", respectively) from monthly Sentinel-1 Synthetic Aperture Radar (SAR) images between January 2016 and January 2026. \r\n
\r\n
Attribute tables for each shapefile contain fields for: \"Crevasse ID\" and \"Date\".\r\n
Crevasse IDs are in order from East to West (Crevasse 1-5). \r\n
Dates refer to the date of the Sentinel-1 image from which the fracture was traced, recorded as as integers in the format 'yyyymmdd'", "citation": "Sharp, M., Pettit, E., Beiergrohslein, Z., Alley, K., Truffer, M., Muto, A., Luckman, A., Muto, Wild, C., and Sauret, G. (2026) \"Fracture traces of the \"Daggers\" on Thwaites Eastern Ice Shelf (2016-2026)\" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/None.", "datePublished": "2026-08-13", "keywords": ["Antarctica", "Basal Crevassing", "Crevasses", "Cryosphere", "Ice Shelf", "Ice Shelf Fracture", "Thwaites"], "creator": [{"@type": "Person", "additionalType": "geolink:Person", "name": "Alley, Karen", "email": "karen.alley@umanitoba.ca", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Beiergrohslein, Zoee", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Luckman, Adrian", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Muto, Atsu", "email": "amuto@temple.edu", "affiliation": {"@type": "Organization", "name": "CIRES 449 UCB"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Pettit, Erin", "email": "pettiter@oregonstate.edu", "affiliation": {"@type": "Organization", "name": "Box 351310, Seattle, Washington 98195-1310, USA"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Sauret, Genevieve", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Sharp, Meghan", "email": "sharpmeg@oregonstate.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Truffer, Martin", "email": "mtruffer2@alaska.edu", "affiliation": {"@type": "Organization", "name": "Physics Department, University of Alaska Fairbanks, P.O. Box 755920, 401 ELV"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Wild, Christian", "email": "christian.wild@uni-tuebingen.de", "affiliation": {"@type": "Organization", "name": null}}], "distribution": [{"@type": "DataDownload", "additionalType": "http://www.w3.org/ns/dcat#DataCatalog", "encodingFormat": "text/xml", "name": "ISO Metadata Document", "url": "https://www.usap-dc.org/metadata/isoxml/602084iso.xml", "contentUrl": "/dataset/filename"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/602084", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/602084", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/602084", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/602084", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}], "identifier": {"@type": "PropertyValue", "url": "https://www.usap-dc.org/view/dataset/602084", "value": "https://www.usap-dc.org/view/dataset/602084"}, "contributor": [{"@type": "Role", "roleName": "credit", "description": "funderName:NSF:GEO:OPP:Antarctic Glaciology awardNumber:1929991 awardTitle:NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "license": [{"@type": "CreativeWork", "URL": "https://creativecommons.org/licenses/by/4.0/", "name": "MD_Constraints", "description": "useLimitation: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_LegalConstraints", "description": "accessConstraints: license. otherConstraints: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_SecurityConstraints", "description": "classification: "}], "publisher": {"@type": "Organization", "name": "U.S. Antarctic Program (USAP) Data Center"}, "spatialCoverage": [{"@type": "Place", "geo": {"@type": "GeoShape", "box": "-75.03, -105.82, -74.85, -105.51"}}]}

Fracture traces of the "Daggers" on Thwaites Eastern Ice Shelf (2016-2026) Cite as Sharp, M., Pettit, E., Beiergrohslein, Z., Alley, K., Truffer, M., Muto, A., Luckman, A., Muto, Wild, C., and Sauret, G. (2026) "Fracture traces of the "Daggers" on Thwaites Eastern Ice Shelf (2016-2026)" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/None. Abstract This dataset includes a shapefiles of traces of a set of fractures extending from the pinning ridge on the Thwaites Eastern Ice Shelf in West Antarctica (the "Daggers"). Fractures were manually-digitized as line features by two independent analysts (shapefiles corresponding to "MS" and "ZB", respectively) from monthly Sentinel-1 Synthetic Aperture Radar (SAR) images between January 2016 and January 2026. Attribute tables for each shapefile contain fields for: "Crevasse ID" and "Date". Crevasse IDs are in order from East to West (Crevasse 1-5). Dates refer to the date of the Sentinel-1 image from which the fracture was traced, recorded as as integers in the format 'yyyymmdd' Creator(s): Sharp, Meghan; Pettit, Erin; Beiergrohslein, Zoee; Alley, Karen; Truffer, Martin; Muto, Atsu; Luckman, Adrian; Wild, Christian; Sauret, Genevieve Date Created: 2026-08-14 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -105.82, East: -105.51, South: -75.03, North: -74.85 Temporal Extent(s) Start: 2016-01-01 - End: 2025-12-31 Award(s) NSF 1929991 Version: 1 Related Project(s) NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment Keywords Antarctica Basal Crevassing Crevasses Cryosphere Ice Shelf Ice Shelf Fracture Thwaites