Franke, Steven; Steinhage, Daniel; Helm, Veit; Zuhr, Alexandra; Eisen, Olaf: Internal Reflection Horizon (IRH) in western Dronning Maud Land, East Antarctica (IRH age = 91.0 ka) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973290 (dataset in review), In: Franke, S et al.: 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.pangaea.de/10.1594/PANGAEA.973266 (dataset in review)
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 1996/17 and 2023/24.
Keyword(s):
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):
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: -75.375560 * Median Longitude: 6.888224 * South-bound Latitude: -78.789345 * West-bound Longitude: -2.104421 * North-bound Latitude: -73.076103 * 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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Season | Season | Franke, Steven | |||
| 2 | Profile ID | Profile ID | Franke, Steven | radar profile ID | ||
| 3 | Paradigm ID | Paradigm ID | Franke, Steven | radar profile ID in the Paradigm system (AWI radar archive and tracing software) | ||
| 4 | Device type | Device | Franke, Steven | one of the following radar products: EMR short-pulse, UWB narrowband or UWB wideband | ||
| 5 | Trace Number | Trace | Franke, Steven | |||
| 6 | LONGITUDE | Longitude | Franke, Steven | Geocode | ||
| 7 | LATITUDE | Latitude | Franke, Steven | Geocode | ||
| 8 | Ice age | Ice age | ka | Franke, Steven | IRH age | |
| 9 | Ice age, uncertainty | Ice age unc | ka | Franke, Steven | estimated IRH age uncertainty at the respective IRH depth | |
| 10 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Franke, Steven | ||
| 11 | Two-way traveltime to ice surface | TWT surface | s | Franke, Steven | ||
| 12 | Two-way traveltime to ice base | TWT ice base | s | Franke, Steven | ||
| 13 | Depth of internal reflection horizon, below ice surface | Depth IRH | m | Franke, Steven | twt-to-depth conversion with a dielectric constant of 3.15 and a firn correction of 13 meters; see Franke et al., 2024 | |
| 14 | Depth of internal reflection horizon, below ice surface, uncertainty | Depth IRH unc | m | Franke, Steven | uncertainty at each IRH depth, based on the radar system resolution, error of 1% in the dielectric permittivity and the uncertainty of the firn correction | |
| 15 | Surface elevation | Surf elev | m | Franke, Steven | from the REMA product (Howat et al., 2019) | |
| 16 | Ice base depth | Ice base depth | m | Franke, Steven | below 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) (License comes into effect after moratorium ends)
Size:
2509800 data points
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