Carter, Charlotte; Paxman, Guy J G; Franke, Steven; Jansen, Daniela; Eisen, Olaf (2025): Morphometric valley classification of the bed topography of the Northeast Greenland Ice Stream, downstream of the EastGRIP ice core site [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984371
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Published: 2025-09-30 • DOI registered: 2025-09-30
Abstract:
The Northeast Greenland Ice Stream (NEGIS) is an elongated feature extending ~600 km into the interior of the Greenland Ice Sheet. Here, we investigate detailed subglacial topography along the length of the NEGIS to ascertain the characteristics of the ice stream bed. The morphology of valley cross-sectional profiles was analysed utilising the workflow of Paxman (2023), which extracted valley profiles from 2018 and 2022 AWI radio echo sounding surveys, as well as a wider selection of Operation IceBridge survey lines within the study area. Morphometric indices relating to valley depth, top width, V-index and curvature ratio were calculated for each profile, in order to produce quantitative characteristic metrics.
Keyword(s):
Supplement to:
Carter, Charlotte; Franke, Steven; Paxman, Guy J G; Jamieson, Stewart S R; Bentley, Michael J; Jansen, Daniela; Paden, John D; Eisen, Olaf (2025): Topographic and geologic controls on the Northeast Greenland Ice Stream. Annals of Glaciology, 66, e29, https://doi.org/10.1017/aog.2025.10028
Related to:
Carter, Charlotte; Jansen, Daniela; Franke, Steven; Helm, Veit; Steinhage, Daniel; Paden, John D; Eisen, Olaf (2023): Ice Thickness from downstream of the EastGRIP ice core site, North East Greenland Ice Stream, recorded with the airborne AWI UWB radar system [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.963555
Franke, Steven; Jansen, Daniela; Binder, Tobias; Dörr, Nils; Helm, Veit; Paden, John D; Steinhage, Daniel; Eisen, Olaf (2019): Bedrock topography and ice thickness in the onset region of the Northeast Greenland Ice Stream recorded with the airborne AWI Ultra-Wideband radar (UWB) in 2018 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.907918
References:
Paxman, Guy J G (2023): Automated mapping and classification of valleys beneath the Greenland Ice Sheet: Code [software]. Zenodo, https://doi.org/10.5281/ZENODO.7797717
Paxman, Guy J G (2023): Patterns of valley incision beneath the Greenland Ice Sheet revealed using automated mapping and classification. Geomorphology, 436, 108778, https://doi.org/10.1016/j.geomorph.2023.108778
Project(s):
East Greenland Ice-core Project (EGRIP)
Coverage:
Median Latitude: 75.635057 * Median Longitude: -35.987942 * South-bound Latitude: 75.633000 * West-bound Longitude: -35.992000 * North-bound Latitude: 75.635306 * East-bound Longitude: -35.986977
Date/Time Start: 2018-05-08T00:00:00 * Date/Time End: 2022-06-16T20:11:23
Event(s):
EGRIP-NOR-18 * Latitude: 75.633000 * Longitude: -35.992000 * Date/Time Start: 2018-05-08T00:00:00 * Date/Time End: 2018-05-17T00:00:00 * Campaign: P6-211_EGRIP_NOR_2018 (EGRIP-NOR) * Basis: POLAR 6 * Method/Device: Multiple investigations (MULT)
P5_233_NEGIS_2022_2206030202 * Latitude Start: 75.635029 * Longitude Start: -35.988516 * Latitude End: 75.635261 * Longitude End: -35.987156 * Date/Time Start: 2022-06-03T13:14:05 * Date/Time End: 2022-06-03T16:18:03 * Location: Arctic * Campaign: P5-233_NEGIS_2022 (NEGIS-FLOW, NEGIS-ANISO, NEGIS Folds) * Basis: POLAR 5 * Method/Device: Aircraft (AC)
P5_233_NEGIS_2022_2206070301 * Latitude Start: 75.635047 * Longitude Start: -35.988611 * Latitude End: 75.635306 * Longitude End: -35.986977 * Date/Time Start: 2022-06-07T12:08:21 * Date/Time End: 2022-06-07T16:47:21 * Location: Arctic * Campaign: P5-233_NEGIS_2022 (NEGIS-FLOW, NEGIS-ANISO, NEGIS Folds) * Basis: POLAR 5 * Method/Device: Aircraft (AC)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
9325 data points
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