Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016)
We evaluate modelled Antarctic ice sheet (AIS) near-surface climate, surface mass balance (SMB) and surface energy balance (SEB) from the updated polar version of the regional atmospheric climate model, RACMO2 (1979–2016). The updated model, referred to as RACMO2.3p2, incorporates upper-air relaxati...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2018
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Online Access: | https://doi.org/10.5194/tc-12-1479-2018 https://www.the-cryosphere.net/12/1479/2018/tc-12-1479-2018.pdf https://doaj.org/article/929f547b4cdc4196b2e73de79b8f8341 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:929f547b4cdc4196b2e73de79b8f8341 2023-05-15T13:51:52+02:00 Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) J. M. van Wessem W. J. van de Berg B. P. Y. Noël E. van Meijgaard C. Amory G. Birnbaum C. L. Jakobs K. Krüger J. T. M. Lenaerts S. Lhermitte S. R. M. Ligtenberg B. Medley C. H. Reijmer K. van Tricht L. D. Trusel L. H. van Ulft B. Wouters J. Wuite M. R. van den Broeke 2018-04-01 https://doi.org/10.5194/tc-12-1479-2018 https://www.the-cryosphere.net/12/1479/2018/tc-12-1479-2018.pdf https://doaj.org/article/929f547b4cdc4196b2e73de79b8f8341 en eng Copernicus Publications doi:10.5194/tc-12-1479-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/1479/2018/tc-12-1479-2018.pdf https://doaj.org/article/929f547b4cdc4196b2e73de79b8f8341 undefined The Cryosphere, Vol 12, Pp 1479-1498 (2018) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/tc-12-1479-2018 2023-01-22T17:44:49Z We evaluate modelled Antarctic ice sheet (AIS) near-surface climate, surface mass balance (SMB) and surface energy balance (SEB) from the updated polar version of the regional atmospheric climate model, RACMO2 (1979–2016). The updated model, referred to as RACMO2.3p2, incorporates upper-air relaxation, a revised topography, tuned parameters in the cloud scheme to generate more precipitation towards the AIS interior and modified snow properties reducing drifting snow sublimation and increasing surface snowmelt. Comparisons of RACMO2 model output with several independent observational data show that the existing biases in AIS temperature, radiative fluxes and SMB components are further reduced with respect to the previous model version. The model-integrated annual average SMB for the ice sheet including ice shelves (minus the Antarctic Peninsula, AP) now amounts to 2229 Gt y−1, with an interannual variability of 109 Gt y−1. The largest improvement is found in modelled surface snowmelt, which now compares well with satellite and weather station observations. For the high-resolution ( ∼ 5.5 km) AP simulation, results remain comparable to earlier studies. The updated model provides a new, high-resolution data set of the contemporary near-surface climate and SMB of the AIS; this model version will be used for future climate scenario projections in a forthcoming study. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelves The Cryosphere Unknown Antarctic Antarctic Peninsula The Antarctic The Cryosphere 12 4 1479 1498 |
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Open Polar |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir J. M. van Wessem W. J. van de Berg B. P. Y. Noël E. van Meijgaard C. Amory G. Birnbaum C. L. Jakobs K. Krüger J. T. M. Lenaerts S. Lhermitte S. R. M. Ligtenberg B. Medley C. H. Reijmer K. van Tricht L. D. Trusel L. H. van Ulft B. Wouters J. Wuite M. R. van den Broeke Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) |
topic_facet |
geo envir |
description |
We evaluate modelled Antarctic ice sheet (AIS) near-surface climate, surface mass balance (SMB) and surface energy balance (SEB) from the updated polar version of the regional atmospheric climate model, RACMO2 (1979–2016). The updated model, referred to as RACMO2.3p2, incorporates upper-air relaxation, a revised topography, tuned parameters in the cloud scheme to generate more precipitation towards the AIS interior and modified snow properties reducing drifting snow sublimation and increasing surface snowmelt. Comparisons of RACMO2 model output with several independent observational data show that the existing biases in AIS temperature, radiative fluxes and SMB components are further reduced with respect to the previous model version. The model-integrated annual average SMB for the ice sheet including ice shelves (minus the Antarctic Peninsula, AP) now amounts to 2229 Gt y−1, with an interannual variability of 109 Gt y−1. The largest improvement is found in modelled surface snowmelt, which now compares well with satellite and weather station observations. For the high-resolution ( ∼ 5.5 km) AP simulation, results remain comparable to earlier studies. The updated model provides a new, high-resolution data set of the contemporary near-surface climate and SMB of the AIS; this model version will be used for future climate scenario projections in a forthcoming study. |
format |
Article in Journal/Newspaper |
author |
J. M. van Wessem W. J. van de Berg B. P. Y. Noël E. van Meijgaard C. Amory G. Birnbaum C. L. Jakobs K. Krüger J. T. M. Lenaerts S. Lhermitte S. R. M. Ligtenberg B. Medley C. H. Reijmer K. van Tricht L. D. Trusel L. H. van Ulft B. Wouters J. Wuite M. R. van den Broeke |
author_facet |
J. M. van Wessem W. J. van de Berg B. P. Y. Noël E. van Meijgaard C. Amory G. Birnbaum C. L. Jakobs K. Krüger J. T. M. Lenaerts S. Lhermitte S. R. M. Ligtenberg B. Medley C. H. Reijmer K. van Tricht L. D. Trusel L. H. van Ulft B. Wouters J. Wuite M. R. van den Broeke |
author_sort |
J. M. van Wessem |
title |
Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) |
title_short |
Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) |
title_full |
Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) |
title_fullStr |
Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) |
title_full_unstemmed |
Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016) |
title_sort |
modelling the climate and surface mass balance of polar ice sheets using racmo2 – part 2: antarctica (1979–2016) |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-1479-2018 https://www.the-cryosphere.net/12/1479/2018/tc-12-1479-2018.pdf https://doaj.org/article/929f547b4cdc4196b2e73de79b8f8341 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelves The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelves The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 1479-1498 (2018) |
op_relation |
doi:10.5194/tc-12-1479-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/1479/2018/tc-12-1479-2018.pdf https://doaj.org/article/929f547b4cdc4196b2e73de79b8f8341 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-12-1479-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
4 |
container_start_page |
1479 |
op_container_end_page |
1498 |
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1766255909720293376 |