Koch, Inka; Drews, Reinhard; Muhle, Lea Sophie; Franke, Steven; Jansen, Daniela; Oraschewski, Falk M; Spiegel, Heiko; Višnjević, Vjeran; Matsuoka, Kenichi; Pattyn, Frank; Eisen, Olaf (2023): Internal reflection horizons of ice shelves and ice rises in eastern Dronning Maud Land (East Antarctica) - Bewise 2012 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.950389, In: Koch, I et al. (2023): Internal reflection horizons of ice shelves and ice rises in eastern Dronning Maud Land (East Antarctica) from multisystem radio-echo sounding data [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.950383
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Abstract:
Ice shelves regulate ice flow from the Antarctic ice sheet towards the ocean and their evolution depends on spatiotemporal patterns of surface accumulation, basal melt, and ice dynamics. These processes shape the ice stratigraphy, which can be imaged by radar and digitized in the form of internal reflection horizons (IRHs). Here, we synthesized IRHs from three airborne and ground-based surveys covering three ice rises and shelves in coastal eastern Dronning Maud Land (East Antarctica).
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Coverage:
Median Latitude: -70.443651 * Median Longitude: 24.893490 * South-bound Latitude: -70.584578 * West-bound Longitude: 24.530833 * North-bound Latitude: -70.333173 * East-bound Longitude: 25.290865
Date/Time Start: 2012-12-08T00:00:00 * Date/Time End: 2012-12-12T00:00:00
Event(s):
BEWISE20121208 * Latitude Start: -70.460298 * Longitude Start: 24.785650 * Latitude End: -70.333983 * Longitude End: 24.732052 * Date/Time: 2012-12-08T00:00:00 * Location: Antarctica * Campaign: BE:WISE2012 (Be:Wise -The Buttressing Effect: Why ice shelves are essential) * Basis: Princess Elisabeth Station * Method/Device: Radar - Ground-based dipole antenna (GBDA)
BEWISE20121209 * Latitude Start: -70.346592 * Longitude Start: 24.629947 * Latitude End: -70.467075 * Longitude End: 24.629812 * Date/Time: 2012-12-09T00:00:00 * Location: Antarctica * Campaign: BE:WISE2012 (Be:Wise -The Buttressing Effect: Why ice shelves are essential) * Basis: Princess Elisabeth Station * Method/Device: Radar - Ground-based dipole antenna (GBDA)
BEWISE20121210 * Latitude Start: -70.467028 * Longitude Start: 24.629807 * Latitude End: -70.564345 * Longitude End: 24.923898 * Date/Time: 2012-12-10T00:00:00 * Location: Antarctica * Campaign: BE:WISE2012 (Be:Wise -The Buttressing Effect: Why ice shelves are essential) * Basis: Princess Elisabeth Station * Method/Device: Radar - Ground-based dipole antenna (GBDA)
Comment:
Dataset: Internal reflection horizions (IRHS) in the Roi Baudouin Ice Shelf (RBIS)
radar type: Ground-based dipole antennae
frequency: 20 MHz
coordinator: Reinhard Drews
tracing operator(s): Leah Sophie Muhle, Inka Koch
original file names: pp1 (08.12.2022), pp1_L1L2 (09.12.2022), L3L4 (10.12.2022), AlongFlow_CrossValley (11.12.2022), L5east (12.12.2022)
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Notes:
IRHs 1-9 are sorted according to depth with the shallowest layer having the smallest ID number, these IRHs were also verified at cross-points
IRHs 10 - 24 are unique IRHs not nescessarily sorted by depth
IRHs 13-14 were also verified at cross-points
Visual pattern matching has been applied when horizontal gaps occur in IRHs
basal pick is corrected to the first break
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Drews, Reinhard | Geocode | ||
| 2 | Survey ID | Survey ID | Drews, Reinhard | |||
| 3 | Profile ID | Profile ID | Drews, Reinhard | |||
| 4 | LONGITUDE | Longitude | Drews, Reinhard | Geocode | ||
| 5 | LATITUDE | Latitude | Drews, Reinhard | Geocode – aquisition date | ||
| 6 | Polar stereographic projection, X | Polar stereo X | m | Drews, Reinhard | project 71 south (EPSG:3031) | |
| 7 | Polar stereographic projection, Y | Polar stereo Y | m | Drews, Reinhard | project 71 south (EPSG:3031) | |
| 8 | Trace Number | Trace | Drews, Reinhard | of the radar transect along-track | ||
| 9 | Pick Date/Time | Pick Date | Drews, Reinhard | date the IRHs were last picked or edited | ||
| 10 | Two-way traveltime to ice base | TWT ice base | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | to the ice base in seconds from the surface |
| 11 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_01 |
| 12 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_02 |
| 13 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_03 |
| 14 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_04 |
| 15 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_05 |
| 16 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_06 |
| 17 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_07 |
| 18 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_08 |
| 19 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_09 |
| 20 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_10 |
| 21 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_11 |
| 22 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_12 |
| 23 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_13 |
| 24 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_14 |
| 25 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_15 |
| 26 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_16 |
| 27 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_17 |
| 28 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_18 |
| 29 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_19 |
| 30 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_20 |
| 31 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_21 |
| 32 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_22 |
| 33 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_23 |
| 34 | Two-way traveltime to internal reflection horizon | TWT IRH | s | Drews, Reinhard | Radar - Ground-based dipole antenna (GBDA) | IRH_24 |
Change history:
2024-08-05T04:51:17 – Unit of Polar stereographic projection changed from "km" to "m".
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
485890 data points
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