Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects
Surface mass balance (SMB) is the builder of the Greenland ice sheet and the driver of ice dynamics. Quantifying the past, present and future state of SMB is important to understand the drivers and climatic processes that control SMB, and to both initialize and run ice sheet models which will help c...
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The Institute of Low Temperature Science, Hokkaido University
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ftawi:oai:epic.awi.de:46755 2024-09-09T19:42:26+00:00 Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects Mottram, Ruth Boberg, Fredrik Langen, Peter L Yang, Shuting Rodehacke, Christian Christensen, Jens H Madsen, Marianne S 2017 application/pdf https://epic.awi.de/id/eprint/46755/ https://epic.awi.de/id/eprint/46755/1/Mottram2017.pdf http://hdl.handle.net/2115/65106 https://hdl.handle.net/10013/epic.626c970c-95ba-4747-8a56-3793d1216f4e unknown The Institute of Low Temperature Science, Hokkaido University https://epic.awi.de/id/eprint/46755/1/Mottram2017.pdf Mottram, R. , Boberg, F. , Langen, P. L. , Yang, S. , Rodehacke, C. orcid:0000-0003-3110-3857 , Christensen, J. H. and Madsen, M. S. (2017) Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects , 低温科学 = Low Temperature Science, 75 , pp. 105-115 . doi:10.14943/lowtemsci.75.105 <https://doi.org/10.14943/lowtemsci.75.105> , hdl:10013/epic.626c970c-95ba-4747-8a56-3793d1216f4e EPIC3低温科学 = Low Temperature Science, The Institute of Low Temperature Science, Hokkaido University, 75, pp. 105-115 Article notRev 2017 ftawi https://doi.org/10.14943/lowtemsci.75.105 2024-06-24T04:19:47Z Surface mass balance (SMB) is the builder of the Greenland ice sheet and the driver of ice dynamics. Quantifying the past, present and future state of SMB is important to understand the drivers and climatic processes that control SMB, and to both initialize and run ice sheet models which will help clarify sea level rise, and how likely changes in ice sheet extent feedback within the climate system. Regional climate models (RCMs) and climate reanalysis are used to quantify SMB estimates. Although different models have different spatial and temporal biases and may include different processes giving significant uncertainty in both SMB and the ice sheet dynamic response to it, all RCMs show a recent declining trend in SMB from the Greenland ice sheet, driven primarily by enhanced melt rates. Here, we present new simulations of the Greenland ice sheet SMB at 5 km resolution from the RCM HIRHAM5. The RCM is driven by the ERA-Interim reanalysis and the global climate model (GCM) EC-Earth v2.3 to make future projections for climate scenarios RCP8.5 and RCP4.5. Future estimates of SMB are affected by biases in driving global climate models, and feedbacks between the ice sheet surface and the global and regional climate system are neglected, likely resulting in significant underestimates of melt and precipitation over the ice sheet. These challenges will need to be met to better estimate the role climate change will have in modulating the surface mass balance of the Greenland ice sheet. Article in Journal/Newspaper Greenland Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Surface mass balance (SMB) is the builder of the Greenland ice sheet and the driver of ice dynamics. Quantifying the past, present and future state of SMB is important to understand the drivers and climatic processes that control SMB, and to both initialize and run ice sheet models which will help clarify sea level rise, and how likely changes in ice sheet extent feedback within the climate system. Regional climate models (RCMs) and climate reanalysis are used to quantify SMB estimates. Although different models have different spatial and temporal biases and may include different processes giving significant uncertainty in both SMB and the ice sheet dynamic response to it, all RCMs show a recent declining trend in SMB from the Greenland ice sheet, driven primarily by enhanced melt rates. Here, we present new simulations of the Greenland ice sheet SMB at 5 km resolution from the RCM HIRHAM5. The RCM is driven by the ERA-Interim reanalysis and the global climate model (GCM) EC-Earth v2.3 to make future projections for climate scenarios RCP8.5 and RCP4.5. Future estimates of SMB are affected by biases in driving global climate models, and feedbacks between the ice sheet surface and the global and regional climate system are neglected, likely resulting in significant underestimates of melt and precipitation over the ice sheet. These challenges will need to be met to better estimate the role climate change will have in modulating the surface mass balance of the Greenland ice sheet. |
format |
Article in Journal/Newspaper |
author |
Mottram, Ruth Boberg, Fredrik Langen, Peter L Yang, Shuting Rodehacke, Christian Christensen, Jens H Madsen, Marianne S |
spellingShingle |
Mottram, Ruth Boberg, Fredrik Langen, Peter L Yang, Shuting Rodehacke, Christian Christensen, Jens H Madsen, Marianne S Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects |
author_facet |
Mottram, Ruth Boberg, Fredrik Langen, Peter L Yang, Shuting Rodehacke, Christian Christensen, Jens H Madsen, Marianne S |
author_sort |
Mottram, Ruth |
title |
Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects |
title_short |
Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects |
title_full |
Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects |
title_fullStr |
Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects |
title_full_unstemmed |
Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects |
title_sort |
surface mass balance of the greenland ice sheet in the regional climate model hirham5: present state and future prospects |
publisher |
The Institute of Low Temperature Science, Hokkaido University |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/46755/ https://epic.awi.de/id/eprint/46755/1/Mottram2017.pdf http://hdl.handle.net/2115/65106 https://hdl.handle.net/10013/epic.626c970c-95ba-4747-8a56-3793d1216f4e |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
EPIC3低温科学 = Low Temperature Science, The Institute of Low Temperature Science, Hokkaido University, 75, pp. 105-115 |
op_relation |
https://epic.awi.de/id/eprint/46755/1/Mottram2017.pdf Mottram, R. , Boberg, F. , Langen, P. L. , Yang, S. , Rodehacke, C. orcid:0000-0003-3110-3857 , Christensen, J. H. and Madsen, M. S. (2017) Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects , 低温科学 = Low Temperature Science, 75 , pp. 105-115 . doi:10.14943/lowtemsci.75.105 <https://doi.org/10.14943/lowtemsci.75.105> , hdl:10013/epic.626c970c-95ba-4747-8a56-3793d1216f4e |
op_doi |
https://doi.org/10.14943/lowtemsci.75.105 |
_version_ |
1809911694575534080 |