Franke, Steven; Steinhage, Daniel; Helm, Veit; Miller, Heinrich; Eisen, Olaf (2022): AWI EMR radar data upstream of the northern catchment of the Nioghalvfjerdsbrae (79°North Glacier), Northeast Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.949619
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Abstract:
Here we present AWI EMR radio-echo sounding data in northeast Greenland upstream of the northern catchment of the Nioghalvfjerdsbrae (79°North Glacier; 79NG). The radar data were acquired with AWI's EMR radar system in 1998. The radar lines are located between the central ice divide and the Northeastern glacier outlet region. The radio-echo sounding data was used to decipher the regional ice-flow history of the northeastern Greenland Ice Sheet based on its internal stratigraphy by mapping folds deep below the surface that we then attribute to the deformation caused by now-extinct ice streams. Locally, this ancient ice flow regime was much more focused and reached much further inland than today's and was deactivated when the main drainage system was reconfigured and relocated southwards.
Supplement to:
Franke, Steven; Bons, Paul D; Westhoff, Julien; Weikusat, Ilka; Binder, Tobias; Streng, Kyra; Steinhage, Daniel; Helm, Veit; Eisen, Olaf; Paden, John D; Eagles, Graeme; Jansen, Daniela (2022): Holocene ice-stream shutdown and drainage basin reconfiguration in northeast Greenland. Nature Geoscience, 15(12), 995-1001, https://doi.org/10.1038/s41561-022-01082-2
Coverage:
Median Latitude: 78.940132 * Median Longitude: -30.732101 * South-bound Latitude: 77.838997 * West-bound Longitude: -37.187923 * North-bound Latitude: 80.041267 * East-bound Longitude: -24.276278
Date/Time Start: 1998-07-12T00:00:00 * Date/Time End: 1998-07-17T00:00:00
Event(s):
NOGRAM_1998_39 (NOGRAM_1998_983518) * Latitude Start: 77.838997 * Longitude Start: -37.187923 * Latitude End: 80.041267 * Longitude End: -24.276278 * Date/Time: 1998-07-12T00:00:00 * Campaign: NOGRAM_1998 * Basis: POLAR 2 * Method/Device: Electromagnetic Reflection System (EMR) * Comment: EMR-Profil 9
NOGRAM_1998_43 (NOGRAM_1998_983525, NOGRAM_1998_983526) * Latitude Start: 77.838997 * Longitude Start: -37.187923 * Latitude End: 80.041267 * Longitude End: -24.276278 * Date/Time: 1998-07-15T00:00:00 * Campaign: NOGRAM_1998 * Basis: POLAR 2 * Method/Device: Electromagnetic Reflection System (EMR) * Comment: EMR-Profil 13
NOGRAM_1998_44 (NOGRAM_1998_983529) * Latitude Start: 77.838997 * Longitude Start: -37.187923 * Latitude End: 80.041267 * Longitude End: -24.276278 * Date/Time: 1998-07-16T00:00:00 * Campaign: NOGRAM_1998 * Basis: POLAR 2 * Method/Device: Electromagnetic Reflection System (EMR) * Comment: EMR-Profil 15
Comment:
Owner/PI: Daniel Steinhage and Olaf Eisen (Alfred Wegener Institute)
Email address of the provider:
daniel.steinhage@awi.de
olaf.eisen@awi.de
Instrument used: AWI EMR Radar
Data Description: We present the radar data and additional variables in the .mat format as well as figures with a radargram plot for each profile.
Profile numbers:
983518
983525
983526
983529
983531
Matfile variables
Data : Matrix containing the return power values (not in dB)
Time : Array containing the time information (two-way traveltime) in range (seconds)
Longitude, Latitude : Coordinates of each trace
Elevation : GPS Elevation of the aircraft (meters above sea level)
Surface : Two-way traveltime of the surface reflection (seconds)
Surface_idx : Pixel position of the surface reflection
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Steinhage, Daniel | |||
| 2 | Date/Time of event | Date/Time | Steinhage, Daniel | |||
| 3 | Image | IMAGE | Steinhage, Daniel | |||
| 4 | Binary Object | Binary | Steinhage, Daniel | |||
| 5 | Binary Object (File Size) | Binary (Size) | Bytes | Steinhage, Daniel |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
10 data points