Seehaus, Thorsten; Sommer, Christian; Malz, Philipp; Dethinne, Thomas (2024): Surface elevation changes of the northern Antarctic Peninsula Ice Sheet (<70°S) derived from repeat bi-static SAR acquisitions for the period 2013-2017 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.964536
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Abstract:
Some of the highest specific mass change rates in Antarctica are reported for the Antarctic Peninsula. However, the existing estimates for the northern Antarctic Peninsula (<70°S) are either spatially limited or are affected by considerable uncertainties. The complex topography, frequent cloud cover, limitations in ice thickness information, boundary effects, and uncertain glacial-isostatic adjustment estimates affect the ice sheet mass change estimates using altimetry, gravimetry, or the input-output method. Within this study, the first assessment of the geodetic mass balance throughout the ice sheet of the northern Antarctic Peninsula is carried out employing bi-static SAR data from the TanDEM-X satellite mission. Repeat coverages from austral-winters 2013 and 2017 are employed. Overall coverage of 96.4% of the study area by surface elevation change measurements and a total mass budget of -24.1±2.8 Gt/a is revealed. The spatial distribution of the surface elevation and mass changes points out, that the former ice shelf tributary glaciers of the Prince-Gustav-Channel, Larsen-A&B, and Wordie ice shelves are the hotpots of ice loss in the study area, and highlights the long-lasting dynamic glacier adjustments after the ice shelf break-up events. The highest mass change rate is revealed for the Airy-Seller-Fleming glacier system of -4.9±0.6 Gt/a and the highest average surface elevation change rate of -2.30±0.03 m/a is observed at Drygalski Glacier. The obtained results provide information on ice surface elevation and mass changes for the entire northern Antarctic Peninsula on unprecedented spatially detailed scales and high precision, and will be beneficial for subsequent analysis and modeling.
References:
Silva, Aline Barbosa; Arigony-Neto, Jorge; Braun, Matthias Holger; Espinoza, Jean Marcel Almeida; Costi, Juliana; Jaña, Ricardo (2020): Spatial and temporal analysis of changes in the glaciers of the Antarctic Peninsula. Global and Planetary Change, 184, 103079, https://doi.org/10.1016/j.gloplacha.2019.103079
Funding:
Bavarian State Ministry for Science and Art, grant/award no. IDP M3OCCA: International Doctorate Program "Measuring and Modelling Mountain glaciers and ice caps in a Changing ClimAte" (M³OCCA)
European Space Agency (ESA), grant/award no. MIT-AP: Mass balance and ice dynamics of Antarctic Peninsula glaciers (MIT-AP)
Coverage:
Median Latitude: -66.500000 * Median Longitude: -62.500000 * South-bound Latitude: -70.000000 * West-bound Longitude: -69.000000 * North-bound Latitude: -63.000000 * East-bound Longitude: -56.000000
Date/Time Start: 2013-01-01T00:00:00 * Date/Time End: 2017-12-31T23:59:59
Event(s):
Comment:
For the analysis in the corresponding paper, the rock outcrops according to Silva et al. (2020) were applied.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | Seehaus, Thorsten | |||
| 2 | Raster graphic, GeoTIFF format | GeoTIFF | Seehaus, Thorsten | |||
| 3 | Raster graphic, GeoTIFF format (File Size) | GeoTIFF (Size) | Bytes | Seehaus, Thorsten | ||
| 4 | Raster graphic, GeoTIFF format (MD5 Hash) | GeoTIFF (Hash) | Seehaus, Thorsten |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
8 data points
Data
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| 1 Content | 2 GeoTIFF | 3 GeoTIFF (Size) [Bytes] | 4 GeoTIFF (Hash) |
|---|---|---|---|
| Surface elevation change field for the period from austral summer 2013 to austral summer 2017 (in m/year) | dh_dt_2013-2017.tif | 404.9 MBytes | dae9e5e8cf3574bfca58bd9a7967fc19 |
| Time difference between individual TanDEM-X acquisitions at pixel level used to compute the surface elevation change rate field (in decimal years) | dt_2013-2017.tif | 54.6 MBytes | 105a829c74e13005d1d0e26dd1d420fc |
| acquisitions dates at pixel level for the first TanDEM-X coverage (in decimal years, relative to 2000) | date_13.tif | 48.3 MBytes | effcd252cb2cdf08c3dc2a57187567ae |
| acquisitions dates at pixel level for the second TanDEM-X coverage (in decimal years, relative to 2000) | date_17.tif | 49.7 MBytes | 0516ad6825dcb6929e4b9266ed7cdb13 |