Surface elevation and ice thickness measurements of an airborne radar survey made in the Sør Rondane Mountains, Antarctica
Fuente:
PANGAEA
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2015
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1867169095030407168 |
|---|---|
| author | Callens, Denis Matsuoka, Kenichi Steinhage, Daniel Pattyn, Frank |
| author_facet | Callens, Denis Matsuoka, Kenichi Steinhage, Daniel Pattyn, Frank |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Mass changes of polar ice sheets have an important societal impact, because they affect global sea level. Estimating the current mass budget of ice sheets is equivalent to determining the balance between surface mass gain through precipitation and outflow across the grounding line. For the Antarctic ice sheet, grounding line outflow is governed by oceanic processes and outlet glacier dynamics. In this study, we compute the mass budget of major outlet glaciers in the eastern Dronning Maud Land sector of the Antarctic ice sheet using the input/output method. Input is given by recent surface accumulation estimates (SMB) of the whole drainage basin. The outflow at the grounding line is determined from the radar data of a recent airborne survey and satellite-based velocities using a flow model of combined plug flow and simple shear. This approach is an improvement on previous studies, as the ice thickness is measured, rather than being estimated from hydrostatic equilibrium. In line with the general thickening of the ice sheet over this sector, we estimate the regional mass balance in this area at 3.15 ± 8.23 Gt/a according to the most recent SMB model results. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_836299 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Surface elevation and ice thickness measurements of an airborne radar survey made in the Sør Rondane Mountains, Antarctica Callens, Denis Matsuoka, Kenichi Steinhage, Daniel Pattyn, Frank Airborne radio-echo sounding; ARES; Dronning Maud Land, Antarctica; Ice thickness, glacier; LATITUDE; LONGITUDE; MULT; Multiple investigations; Surface elevation; Sør_Rondane_Glacial_System Mass changes of polar ice sheets have an important societal impact, because they affect global sea level. Estimating the current mass budget of ice sheets is equivalent to determining the balance between surface mass gain through precipitation and outflow across the grounding line. For the Antarctic ice sheet, grounding line outflow is governed by oceanic processes and outlet glacier dynamics. In this study, we compute the mass budget of major outlet glaciers in the eastern Dronning Maud Land sector of the Antarctic ice sheet using the input/output method. Input is given by recent surface accumulation estimates (SMB) of the whole drainage basin. The outflow at the grounding line is determined from the radar data of a recent airborne survey and satellite-based velocities using a flow model of combined plug flow and simple shear. This approach is an improvement on previous studies, as the ice thickness is measured, rather than being estimated from hydrostatic equilibrium. In line with the general thickening of the ice sheet over this sector, we estimate the regional mass balance in this area at 3.15 ± 8.23 Gt/a according to the most recent SMB model results. |
| title | Surface elevation and ice thickness measurements of an airborne radar survey made in the Sør Rondane Mountains, Antarctica |
| topic | Airborne radio-echo sounding; ARES; Dronning Maud Land, Antarctica; Ice thickness, glacier; LATITUDE; LONGITUDE; MULT; Multiple investigations; Surface elevation; Sør_Rondane_Glacial_System |
| url | https://doi.org/10.1594/PANGAEA.836299 |