Bons, Paul D; Kleiner, Thomas; Llorens, Maria-Gema; Prior, David J; Sachau, Till; Weikusat, Ilka; Jansen, Daniela (2018): Band-pass-filtered ice-sheet surface elevation, thickness, velocity and derived data maps for the northern Greenland Ice Sheet [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.890558, Supplement to: Bons, PD et al. (2018): Greenland Ice Sheet: Higher Nonlinearity of Ice Flow Significantly Reduces Estimated Basal Motion. Geophysical Research Letters, 45(13), 6542-6548, https://doi.org/10.1029/2018GL078356
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Abstract:
In times of warming in polar regions, the prediction of ice sheet discharge is of utmost importance to society, because of its impact on sea level rise. In simulations the flow rate of ice is usually implemented as proportional to the differential stress to the power of the exponent n=3. This exponent influences the softness of the modeled ice, as higher values would produce faster flow under equal stress. We show that the stress exponent, which best fits the observed state of the Greenland Ice Sheet, equals n=4, Our results, which are not dependent on a possible basal sliding component of flow, indicate that most of the interior northern ice sheet is currently frozen to bedrock, except for the large ice streams and marginal ice.
Coverage:
Latitude: 76.158036 * Longitude: -38.668208
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | Bons, Paul D | |||
| 2 | File name | File name | Bons, Paul D | |||
| 3 | File format | File format | Bons, Paul D | |||
| 4 | File size | File size | kByte | Bons, Paul D | ||
| 5 | Uniform resource locator/link to file | URL file | Bons, Paul D |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
75 data points
Data
| 1 Content | 2 File name | 3 File format | 4 File size [kByte] | 5 URL file |
|---|---|---|---|---|
| Description and georeferencing | Description_and_georeferencing.pdf | 59 | Description_and_georeferencing.pdf | |
| 1 surface elevation | 1_surface_elevation.txt | TXT | 71276 | 1_surface_elevation.txt |
| 1 surface elevation thumb | 1_surface_elevation_thumb.tif | TIF | 1663 | 1_surface_elevation_thumb.tif |
| 2 ice thickness | 2_ice_thickness.txt | TXT | 97613 | 2_ice_thickness.txt |
| 2 ice thickness thumb | 2_ice_thickness_thumb.tif | TIF | 1663 | 2_ice_thickness_thumb.tif |
| 3 driving stress | 3_driving_stress.txt | TXT | 53242 | 3_driving_stress.txt |
| 3 driving stress thumb | 3_driving_stress_thumb.tif | TIF | 1663 | 3_driving_stress_thumb.tif |
| 4 mean shear rate | 4_mean_shear_rate.txt | TXT | 53242 | 4_mean_shear_rate.txt |
| 4 mean shear rate thumb | 4_mean_shear_rate_thumb.tif | TIF | 1663 | 4_mean_shear_rate_thumb.tif |
| 5 predicted V surf ice n4 | 5_predicted_V_surf_ice_n4.txt | TXT | 92530 | 5_predicted_V_surf_ice_n4.txt |
| 5 predicted V surf ice n4 thumb | 5_predicted_V_surf_ice_n4_thumb.tif | TIF | 1663 | 5_predicted_V_surf_ice_n4_thumb.tif |
| 6 predicted V base n4 | 6_predicted_V_base_n4.txt | TXT | 54935 | 6_predicted_V_base_n4.txt |
| 6 predicted V base n4 thumb | 6_predicted_V_base_n4_thumb.tif | TIF | 1663 | 6_predicted_V_base_n4_thumb.tif |
| 7 data mask | 7_data_mask.txt | TXT | 53242 | 7_data_mask.txt |
| 7 data mask thumb | 7_data_mask_thumb.tif | TIF | 1663 | 7_data_mask_thumb.tif |