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Franke, Steven; Jansen, Daniela; Helm, Veit (2020): Ice Thickness from Jutulstraumen Glacier recorded with the airborne AWI UWB radar system, Antarctica. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.911475

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Abstract:
Ice Thickness from Jutulstraumen Glacier recorded with the AWI UWB radar system
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Focus of this project was to map the disturbances of the radar stratigraphy at the shear margins of the Jutulstraumen, a large outlet glacier in Dronning Maud Land (DML), Antarctica, as well as within its main trunk. This project will help to improve our understanding of the formation processes of such disturbances around shear margins in active ice streams. A better understanding of the process itself will enable to analyse the observed structures in other parts of the ice sheets in terms of their deformation history.
For JuRaS the profiles consist of parallel lines directed perpendicular to the flow direction of the main trunk of the Jutulstraumen, as well as profiles across an eastern tributary. Due to our fueling stop in Kohnen Station we were also able to collect a connecting radar line between the location of the EDML ice core to our main survey area, which is useful for referencing and dating reflections in our data and making connections to survey flights conducted in the 1990s, 2000s and later.
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AWI Flight Campaign: P6-215_UWB_2018
Project: JuRaS-2018
Region: Antarctica, Dronning Maud Land, Jutulstraumen Ice Stream
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Owner / PI: Daniela Jansen (AWI)
Email address of the provider:
steven.franke@awi.de
daniela.jansen@awi.de
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Instrument used: AWI UWB (MCoRDS 5)
Firn correction: none applied
Velocity profile: dielectric constant of 3.15 ( c = 1.68914e8 m/s )
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Ice Thickness uncertainty:
is the RMS of the the sum of the crossover mean of 62 intersections (= 24.7 m)
and the error of the dielectric (1%).
sqrt( (crossover_mean)^2 + ( (-ice_thickness/2) * 0.01 )^2 )
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GPS data was acquired by four NovAtel DL-V3 GPS receivers operating at 20Hz
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Level of focusing:
focused SAR
Keyword(s):
AWI UWB; ice thickness; Jutulstraumen; radio-echo sounding
Supplement to:
Franke, Steven; Eisermann, Hannes; Jokat, Wilfried; Eagles, Graeme; Asseng, Jölund; Miller, Heinrich; Steinhage, Daniel; Helm, Veit; Eisen, Olaf; Jansen, Daniela (2021): Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin. Earth Surface Processes and Landforms, 46(13), 2728-2745, https://doi.org/10.1002/esp.5203
Coverage:
Median Latitude: -73.594971 * Median Longitude: 1.767050 * South-bound Latitude: -75.018562 * West-bound Longitude: -0.960536 * North-bound Latitude: -72.222366 * East-bound Longitude: 3.824309
Date/Time Start: 2018-12-22T10:14:20 * Date/Time End: 2018-12-27T17:23:44
Minimum POINT DISTANCE from start: 0.00 m * Maximum POINT DISTANCE from start: 110807.80 m
Event(s):
P6_215_UWB_2018_1812220301 * Latitude Start: -71.955397 * Longitude Start: 2.472649 * Latitude End: -75.001112 * Longitude End: 0.061624 * Date/Time Start: 2018-12-22T09:12:50 * Date/Time End: 2018-12-22T13:18:49 * Campaign: P6_215_UWB_2018 (JuRaS - Jutulstraumen Radar Stratigraphy) * Basis: POLAR 6 * Method/Device: Aircraft (AC)
P6_215_UWB_2018_1812260501 * Latitude Start: -71.955418 * Longitude Start: 2.472312 * Latitude End: -71.955430 * Longitude End: 2.472169 * Date/Time Start: 2018-12-26T08:36:41 * Date/Time End: 2018-12-26T12:40:40 * Campaign: P6_215_UWB_2018 (JuRaS - Jutulstraumen Radar Stratigraphy) * Basis: POLAR 6 * Method/Device: Aircraft (AC)
P6_215_UWB_2018_1812260602 * Latitude Start: -71.955432 * Longitude Start: 2.472197 * Latitude End: -71.955405 * Longitude End: 2.472296 * Date/Time Start: 2018-12-26T14:45:10 * Date/Time End: 2018-12-26T19:13:10 * Campaign: P6_215_UWB_2018 (JuRaS - Jutulstraumen Radar Stratigraphy) * Basis: POLAR 6 * Method/Device: Aircraft (AC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventJansen, Daniela
2DATE/TIMEDate/TimeJansen, DanielaGeocode – UTC
3Flight numberFlightJansen, Daniela
4ProfileProfileJansen, DanielaProfile ID in the AWI UWB system
5ProfileProfileJansen, DanielaProfile ID in the ECHOS/Paradigm system
6NumberNoJansen, DanielaTrace number in a profile
7LONGITUDELongitudeJansen, DanielaGeocode
8LATITUDELatitudeJansen, DanielaGeocode
9Two-way traveltimeTWTnsJansen, DanielaBed_TWT - Surf_TWT
10Ice thicknessIce thickmJansen, DanielaIce Thickness Radar (EMR, MCoRDS)derived from Ice_TWT_ns and the constant velocity profile
11Ice thickness, uncertaintyIce thick unc±Jansen, DanielaIce Thickness Radar (EMR, MCoRDS)based on the mean crossover deviation and dielectric error of 1%
12POINT DISTANCE from startDistmJansen, DanielaGeocode – along-track distance of a profile
Size:
1329797 data points

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