PANGAEA_995616 ARK 1997: AWI airborne Radio-Echo Sounding data over the North GRIP ice core site in central Greenland and south-west Greenland (Nord GRIP project) Steinhage, Daniel; Helm, Veit ARK 1997: AWI airborne Radio-Echo Sounding data over the North GRIP ice core site in central Greenland and south-west Greenland (Nord GRIP project) 2026-06-19 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.995616 Investigator Daniel Steinhage Daniel.Steinhage@awi.de Earth Science Season Profile ID Instrument Radar product netCDF file netCDF file (File Size) GIS file Image geoscientificInformation Aircraft AWI EMR Greenland ice cores Greenland ice sheet Ice core NGRIP NGRIP_1997 NGRIP_1997_01a NGRIP_1997_01b NGRIP_1997_02 NGRIP_1997_03 NGRIP_1997_04 NGRIP_1997_05 NGRIP_1997_06 NGRIP_1997_07a NGRIP_1997_07b NGRIP_1997_08 NGRIP_1997_09 NGRIP_1997_11 NGRIP_1997_13 NGRIP_1997_14 NGRIP_1997_15 NGRIP_1997_16 NGRIP_1997_17 NorthGRIP ice core Polar 2 radio-echo sounding Ice Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999] POLAR 2 1997-05-20 1997-06-20 Complete 65.406593 75.095619 -53.252098 -42.316578 NGRIP North Greenland Ice Core Project unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 266 data points text/tab-separated-values Eisen, Olaf; Steinhage, Daniel; Franke, Steven; Helm, Veit; Binder, Tobias; Drews, Reinhard; Eagles, Graeme; Humbert, Angelika; Jansen, Daniela; Jokat, Wilfried; Lambrecht, Astrid; Mieth, Matthias; Riedel, Sven; Miller, Heinrich (2024): Collection of datasets from AWI's radio-echo sounding systems on ice sheets and glaciers [dataset bibliography]. PANGAEA, https://doi.org/10.1594/PANGAEA.972094 Franke, Steven; Steinhage, Daniel; Helm, Veit; Binder, Tobias; Nixdorf, Uwe; Miller, Heinrich; Humbert, Angelika; Jansen, Daniela; Eagles, Graeme; Eisermann, Hannes; Jokat, Wilfried; Ruppel, Antonia; Drews, Reinhard; Zuhr, Alexandra; Driemel, Amelie; Walter, Andreas; Konopatzky, Peter; Heß, Robin; Haas, Antonie; Koppe, Roland; Andreas, Pascal H; Eisen, Olaf (2026): Review article: 30 years of airborne radar surveys on the Antarctic and Greenland ice sheets by the Alfred Wegener Institute. The Cryosphere, 20(4), 2485-2530, https://doi.org/10.5194/tc-20-2485-2026 Göktas, Fidan (1999): Ergebnisse der Untersuchung des grönlandischen Inlandeises mit dem elektromagnetischen Reflexionsverfahren in der Umgebung von NGRIP (Results from airborne radio-echosounding of the Greenland icesheet in the vicinity of NGRIP). Berichte zur Polarforschung = Reports on Polar Research, 336, 97 pp, https://doi.org/10.2312/BzP_0336_1999 Nixdorf, Uwe; Göktas, Fidan (2001): Spatial depth distribution of the subglacial bed and internal layers in the ice around NGRIP, Greenland, derived with airborne RES. Journal of Applied Geophysics, 47(3-4), 175-182, https://doi.org/10.1016/S0926-9851(01)00062-3 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 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

This dataset contains airborne radar data acquired using the AWI EMR system (Nixdorf et al., 1999) during the Arctic season of 1997. The profiles extend in a grid around the North GRIP ice core site in central Greenland and in south-west Greenland. The data are available as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.995616"! ** Project PI: Daniel Steinhage (AWI) Contact persons for AWI Radio-echo sounding data: Daniel Steinhage (daniel.steinhage@awi.de), Veit Helm (veit.helm@awi.de), Olaf Eisen (olaf.eisen@awi.de) The data are available as netCDF files, KML files, and quicklook images (JPEGs) of the radargrams. -- 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 -- The KML files are in EPSG:4326, and the quicklook images show the AGC product of the radargram.

https://doi.org/10.1016/S0926-9851(01)00062-3 Spatial depth distribution of the subglacial bed and internal layers in the ice around NGRIP, Greenland, derived with airborne RES https://doi.org/10.2312/BzP_0336_1999 Ergebnisse der Untersuchung des grönlandischen Inlandeises mit dem elektromagnetischen Reflexionsverfahren in der Umgebung von NGRIP (Results from airborne radio-echosounding of the Greenland icesheet in the vicinity of NGRIP) https://doi.org/10.3189/172756499781821346 Ice Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999] https://doi.org/10.3189/172756499781821346 The newly developed airborne radio-echo sounding system of the AWI as a glaciological tool https://doi.org/10.5065/D6H70CW6 netCDF file https://doi.org/10.5065/D6H70CW6 netCDF file (File Size) https://doi.org/10.5194/tc-20-2485-2026 Review article: 30 years of airborne radar surveys on the Antarctic and Greenland ice sheets by the Alfred Wegener Institute https://doi.pangaea.de/10.1594/PANGAEA.972094 Collection of datasets from AWI's radio-echo sounding systems on ice sheets and glaciers https://en.wikipedia.org/wiki/North_Greenland_Ice_Core_Project NGRIP https://registry.o2a-data.de/items/6794 Metadata for radar system Ice Thickness Radar 150 MHz at current version https://www.awi.de/en/about-us/organisation/staff/single-view/daniel-steinhage.html DIF 9.4 2026-06-19 2026-07-18