Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model
This study evaluates the impact of a recent upgrade in the physics package of the regional atmospheric climate model RACMO2 on the simulated surface mass balance (SMB) of the Antarctic ice sheet. The modelled SMB increases, in particular over the grounded ice sheet of East Antarctica (+44Gt a-1), wi...
Main Authors: | , , , , , , , , , , , , , |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | https://dspace.library.uu.nl/handle/1874/304807 |
id |
ftunivutrecht:oai:dspace.library.uu.nl:1874/304807 |
---|---|
record_format |
openpolar |
spelling |
ftunivutrecht:oai:dspace.library.uu.nl:1874/304807 2023-07-23T04:15:10+02:00 Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model Van Wessem, J. M. Reijmer, C. H. Morlighem, M. Mouginot, J. Rignot, E. Medley, B. Joughin, I. Wouters, B. Depoorter, M. A. Bamber, J. L. Lenaerts, J. T M Van De Berg, W. J. Van Den Broeke, M. R. Van Meijgaard, E. Sub Dynamics Meteorology Marine and Atmospheric Research 2014-10-31 image/pdf https://dspace.library.uu.nl/handle/1874/304807 en eng 0022-1430 https://dspace.library.uu.nl/handle/1874/304807 info:eu-repo/semantics/OpenAccess Accumulation Atmosphere/ice/ocean interactions Ice and climate Ice velocity Surface mass budget Earth-Surface Processes Article 2014 ftunivutrecht 2023-07-02T01:09:06Z This study evaluates the impact of a recent upgrade in the physics package of the regional atmospheric climate model RACMO2 on the simulated surface mass balance (SMB) of the Antarctic ice sheet. The modelled SMB increases, in particular over the grounded ice sheet of East Antarctica (+44Gt a-1), with a small change in West Antarctica. This mainly results from an increase in precipitation, which is explained by changes in the cloud microphysics, including a new parameterization for ice cloud supersaturation, and changes in large-scale circulation patterns, which alter topographically forced precipitation. The spatial changes in SMB are evaluated using 3234 in situ SMB observations and ice-balance velocities, and the temporal variability using GRACE satellite retrievals. The in situ observations and balance velocities show a clear improvement of the spatial representation of the SMB in the interior of East Antarctica, which has become considerably wetter. No improvements are seen for West Antarctica and the coastal regions. A comparison of model SMB temporal variability with GRACE satellite retrievals shows no significant change in performance. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet West Antarctica Utrecht University Repository Antarctic East Antarctica The Antarctic West Antarctica |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Accumulation Atmosphere/ice/ocean interactions Ice and climate Ice velocity Surface mass budget Earth-Surface Processes |
spellingShingle |
Accumulation Atmosphere/ice/ocean interactions Ice and climate Ice velocity Surface mass budget Earth-Surface Processes Van Wessem, J. M. Reijmer, C. H. Morlighem, M. Mouginot, J. Rignot, E. Medley, B. Joughin, I. Wouters, B. Depoorter, M. A. Bamber, J. L. Lenaerts, J. T M Van De Berg, W. J. Van Den Broeke, M. R. Van Meijgaard, E. Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
topic_facet |
Accumulation Atmosphere/ice/ocean interactions Ice and climate Ice velocity Surface mass budget Earth-Surface Processes |
description |
This study evaluates the impact of a recent upgrade in the physics package of the regional atmospheric climate model RACMO2 on the simulated surface mass balance (SMB) of the Antarctic ice sheet. The modelled SMB increases, in particular over the grounded ice sheet of East Antarctica (+44Gt a-1), with a small change in West Antarctica. This mainly results from an increase in precipitation, which is explained by changes in the cloud microphysics, including a new parameterization for ice cloud supersaturation, and changes in large-scale circulation patterns, which alter topographically forced precipitation. The spatial changes in SMB are evaluated using 3234 in situ SMB observations and ice-balance velocities, and the temporal variability using GRACE satellite retrievals. The in situ observations and balance velocities show a clear improvement of the spatial representation of the SMB in the interior of East Antarctica, which has become considerably wetter. No improvements are seen for West Antarctica and the coastal regions. A comparison of model SMB temporal variability with GRACE satellite retrievals shows no significant change in performance. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Van Wessem, J. M. Reijmer, C. H. Morlighem, M. Mouginot, J. Rignot, E. Medley, B. Joughin, I. Wouters, B. Depoorter, M. A. Bamber, J. L. Lenaerts, J. T M Van De Berg, W. J. Van Den Broeke, M. R. Van Meijgaard, E. |
author_facet |
Van Wessem, J. M. Reijmer, C. H. Morlighem, M. Mouginot, J. Rignot, E. Medley, B. Joughin, I. Wouters, B. Depoorter, M. A. Bamber, J. L. Lenaerts, J. T M Van De Berg, W. J. Van Den Broeke, M. R. Van Meijgaard, E. |
author_sort |
Van Wessem, J. M. |
title |
Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
title_short |
Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
title_full |
Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
title_fullStr |
Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
title_full_unstemmed |
Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
title_sort |
improved representation of east antarctic surface mass balance in a regional atmospheric climate model |
publishDate |
2014 |
url |
https://dspace.library.uu.nl/handle/1874/304807 |
geographic |
Antarctic East Antarctica The Antarctic West Antarctica |
geographic_facet |
Antarctic East Antarctica The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet West Antarctica |
op_relation |
0022-1430 https://dspace.library.uu.nl/handle/1874/304807 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772189175715463168 |