Citation:

PANGAEA.949619

Name: AWI EMR radar data upstream of the northern catchment of the Nioghalvfjerdsbrae (79°North Glacier), Northeast Greenland
Published: 2022-10-12
License: https://creativecommons.org/licenses/by/4.0/
Keywords: AWI EMR; Greenland; Ice Sheet; radio-echo sounding; RES

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

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.

Keyword(s):

AWI EMR; Greenland; Ice Sheet; radio-echo sounding; RES

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: * 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: * 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: * 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
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

Data

Download dataset as tab-delimited text — use the following character encoding:

All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.

1 Event	2 Date/Time	3 IMAGE	4 Binary	5 Binary (Size) [Bytes]
NOGRAM_1998_39	1998-07-12	983518.png	983518_awi_emr.mat	156.8 MBytes
NOGRAM_1998_43	1998-07-15	983525.png	983525_awi_emr.mat	211.4 MBytes
NOGRAM_1998_43	1998-07-15	983526.png	983526_awi_emr.mat	170.7 MBytes
NOGRAM_1998_44	1998-07-16	983529.png	983529_awi_emr.mat	173.1 MBytes
NOGRAM_1998_45	1998-07-17	983531.png	983531_awi_emr.mat	227.2 MBytes