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...
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ftcdlib:oai:escholarship.org:ark:/13030/qt4sj3n5jb 2023-06-11T04:06:11+02:00 Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model Van Wessem, JM Reijmer, CH Morlighem, M Mouginot, J Rignot, E Medley, B Joughin, I Wouters, B Depoorter, MA Bamber, JL Lenaerts, JTM Van De Berg, WJ Van Den Broeke, MR Van Meijgaard, E 761 - 770 2014-01-01 application/pdf https://escholarship.org/uc/item/4sj3n5jb unknown eScholarship, University of California qt4sj3n5jb https://escholarship.org/uc/item/4sj3n5jb CC-BY Journal of Glaciology, vol 60, iss 222 Climate Action accumulation atmosphere/ice/ocean interactions ice and climate ice velocity surface mass budget Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences article 2014 ftcdlib 2023-05-29T17:59:51Z 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 Journal of Glaciology West Antarctica University of California: eScholarship Antarctic East Antarctica The Antarctic West Antarctica |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action accumulation atmosphere/ice/ocean interactions ice and climate ice velocity surface mass budget Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action accumulation atmosphere/ice/ocean interactions ice and climate ice velocity surface mass budget Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences Van Wessem, JM Reijmer, CH Morlighem, M Mouginot, J Rignot, E Medley, B Joughin, I Wouters, B Depoorter, MA Bamber, JL Lenaerts, JTM Van De Berg, WJ Van Den Broeke, MR Van Meijgaard, E Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model |
topic_facet |
Climate Action accumulation atmosphere/ice/ocean interactions ice and climate ice velocity surface mass budget Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
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. |
format |
Article in Journal/Newspaper |
author |
Van Wessem, JM Reijmer, CH Morlighem, M Mouginot, J Rignot, E Medley, B Joughin, I Wouters, B Depoorter, MA Bamber, JL Lenaerts, JTM Van De Berg, WJ Van Den Broeke, MR Van Meijgaard, E |
author_facet |
Van Wessem, JM Reijmer, CH Morlighem, M Mouginot, J Rignot, E Medley, B Joughin, I Wouters, B Depoorter, MA Bamber, JL Lenaerts, JTM Van De Berg, WJ Van Den Broeke, MR Van Meijgaard, E |
author_sort |
Van Wessem, JM |
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 |
publisher |
eScholarship, University of California |
publishDate |
2014 |
url |
https://escholarship.org/uc/item/4sj3n5jb |
op_coverage |
761 - 770 |
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 Journal of Glaciology West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Journal of Glaciology West Antarctica |
op_source |
Journal of Glaciology, vol 60, iss 222 |
op_relation |
qt4sj3n5jb https://escholarship.org/uc/item/4sj3n5jb |
op_rights |
CC-BY |
_version_ |
1768377993359523840 |