Miller, Heinrich; Steinhage, Daniel; Helm, Veit; Mayer, Christoph (2025): ARK 1998: AWI airborne Radio-Echo Sounding data over Northeast Greenland between North GRIP and Station Nord (NOGRAM project) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.974043 (DOI registration in progress)
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Published: 2025-05-26
Abstract:
This dataset contains airborne radar data acquired using the AWI EMR system (Nixdorf et al., 1999) during the Arctic season of 1998. The profiles extend across the Northeast Greenland Ice Sheet between North GRIP and Station North. The data are available as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams.
Related 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
References:
Nixdorf, Uwe; Steinhage, Daniel; Meyer, Uwe F; Hempel, L; Jenett, Martin; Wachs, P; Miller, Heinrich (1999): The newly developed airborne radio-echo sounding system of the AWI as a glaciological tool. Annals of Glaciology, 29, 231-238, https://doi.org/10.3189/172756499781821346
Additional metadata:
O2A Registry: Metadata for radar system Ice Thickness Radar 150 MHz at current version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, https://registry.o2a-data.de/items/6794
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:
The data are available as netCDF files, KML files, and quicklook images (JPEGs) of the radargrams.
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The netCDF files contain the following variables:
altitude: Platform altitude (WGS84) in meters
bed_elevation: bed elevation for each trace (using no firn correction and permitivity of ice: 3.15) in meters
bed_pick: picked bed location for each trace, expressed as twt in seconds
data: radar data
data_agc: scaled radar data using automatic gain control (AGC)
distance: Along-track distance in meters
ice_thickness: ice thickness for each trace (using no firn correction and permitivity of ice: 3.15) in meters
lat: Latitude in decimal degrees
lon: Longitude in decimal degrees
range: Range between sensor and surface in meters
spacing: along track trace to trace spacing in meters
surface: surface elevation derived from radar (WGS84) in meters
surface_pick: picked surface reflection in two-way travel time in seconds
time: Seconds of day
twt: Two-way travel time (twt) in seconds
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The KML files are in EPSG:4326, and the quicklook images show the AGC product of the radargram.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Season | Season | Miller, Heinrich | |||
| 2 | Profile ID | Profile ID | Miller, Heinrich | |||
| 3 | Instrument | Instrument | Miller, Heinrich | |||
| 4 | Radar product | Radar prod | Miller, Heinrich | |||
| 5 | netCDF file | netCDF | Miller, Heinrich | Ice Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999] | ||
| 6 | netCDF file (File Size) | netCDF (Size) | Bytes | Miller, Heinrich | Ice Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999] | |
| 7 | GIS file | GIS | Miller, Heinrich | Ice Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999] | KML Files | |
| 8 | Image | IMAGE | Miller, Heinrich | Ice Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999] | Quicklook |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
217 data points