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Franke, Steven; Steinhage, Daniel; Helm, Veit; Zuhr, Alexandra; Eisen, Olaf (2025): Internal Reflection Horizon (IRH) in western Dronning Maud Land, East Antarctica (IRH age = 52.2 ka) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.973288, In: Franke, S et al. (2025): Internal Reflection Horizons (IRHs) in western Dronning Maud Land, East Antarctica from airborne radar surveys (4.8 - 91.0 ka) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.973266

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Published: 2025-01-16 • DOI registered: 2025-02-14

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Abstract:
We present internal reflection horizons (IRHs) from airborne radar data in western Dronning Maud Land, East Antarctica. The IRHs were dated at the EDML ice core and IRH ages range between 4.8 and 91.0 ka before present. Radar data were collected with the AWI EMR and UWB radar systems in period between summer seasons 1996/97 and 2023/24.
Keyword(s):
Airborne Radar; Antarctic Ice Sheet; AWI EMR; AWI UWB; Dronning Maud Land; EDML; Internal Reflection Horizon; radio-echo sounding
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, hdl:10013/sensor.919f4dff-22db-4b62-a2a2-70a2f6f159c4
O2A Registry: Metadata for radar system Ultra-wideband ice radar at current Version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, hdl:10013/sensor.ed2143d3-0353-4c5a-b867-c46bc26d6152
Project(s):
Internal structure of ice sheets - SCAR Action Group (AntArchitecture)
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas (SPP1158)
Funding:
German Research Foundation (DFG), grant/award no. 506043073: DANGER DML - Deciphering the evolution of an East Antarctic drainage system over the last glacial cycle in western Dronning Maud Land
German Research Foundation (DFG), grant/award no. 522419679: Is Dronning Maud Land mitigating sea level rise in the 21st century? Quantifying the anthropogenically induced change in snow accumulation in East Antarctica
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Median Latitude: -75.280884 * Median Longitude: 3.195191 * South-bound Latitude: -80.773262 * West-bound Longitude: -8.812114 * North-bound Latitude: -72.609184 * East-bound Longitude: 40.369629
Date/Time Start: 2008-01-16T12:09:47 * Date/Time End: 2023-12-11T20:15:30
Event(s):
DoCo_2007/08_06 * Latitude Start: -69.027306 * Longitude Start: 40.089062 * Latitude End: -69.431107 * Longitude End: 76.340141 * Date/Time Start: 2008-01-16T12:09:47 * Date/Time End: 2008-01-16T16:52:30 * Location: Antarctica, East * Campaign: DoCo_2007/08 * Basis: POLAR 5 * Method/Device: Aircraft (AC)
P6_204_ANT_GEA_2016_2017_1612030703 * Latitude Start: -70.824006 * Longitude Start: 11.642864 * Latitude End: -70.823966 * Longitude End: 11.642672 * Date/Time Start: 2016-12-03T14:05:06 * Date/Time End: 2016-12-03T19:07:05 * Location: Antarctica * Campaign: P6-204_ANT_GEA_2016_2017 (Geodynamic Evolution of East Antarctica, the Forster Magnetic Anomaly) * Basis: POLAR 6 * Method/Device: Aircraft (AC)
P6_204_ANT_GEA_2016_2017_1612040901 * Latitude Start: -70.824005 * Longitude Start: 11.642926 * Latitude End: -75.001097 * Longitude End: 0.058860 * Date/Time Start: 2016-12-04T14:05:21 * Date/Time End: 2016-12-04T16:24:19 * Location: Antarctica * Campaign: P6-204_ANT_GEA_2016_2017 (Geodynamic Evolution of East Antarctica, the Forster Magnetic Anomaly) * Basis: POLAR 6 * Method/Device: Aircraft (AC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1SeasonSeasonFranke, Steven
2Profile IDProfile IDFranke, Stevenradar profile ID
3Paradigm IDParadigm IDFranke, Stevenradar profile ID in the Paradigm system (AWI radar archive and tracing software)
4Device typeDeviceFranke, Stevenone of the following radar products: EMR short-pulse, UWB narrowband or UWB wideband
5Trace NumberTraceFranke, Steven
6LONGITUDELongitudeFranke, StevenGeocode
7LATITUDELatitudeFranke, StevenGeocode
8Internal reflection horizon, ageIRH agekaFranke, Steven
9Internal reflection horizon, age, uncertaintyIRH age unckaFranke, Stevenestimated uncertainty at the respective IRH depth
10Two-way traveltime to internal reflection horizonTWT IRHsFranke, Steven
11Two-way traveltime to ice surfaceTWT surfacesFranke, Steven
12Two-way traveltime to ice baseTWT ice basesFranke, Steven
13Depth of internal reflection horizon, below ice surfaceDepth IRHmFranke, Steventwt-to-depth conversion with a dielectric constant of 3.15 and a firn correction of 13 meters; see Franke et al., 2024
14Depth of internal reflection horizon, below ice surface, uncertaintyDepth IRH uncmFranke, Stevenuncertainty at each IRH depth, based on the radar system resolution, error of 1% in the dielectric permittivity and the uncertainty of the firn correction
15Surface elevationSurf elevmFranke, Stevenfrom the REMA product (Howat et al., 2019)
16Ice base depthIce base depthmFranke, Stevenbelow ice surface (twt-to-depth conversion with a dielectric constant of 3.15 and a firn correction of 13 meters; see Franke et al., 2024)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
5421758 data points

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