Ice sheet mass loss caused by dust and black carbon accumulation
Albedo is the dominant factor governing surface melt variability in the ablation area of ice sheets and glaciers. Aerosols such as mineral dust and black carbon (soot) accumulate on the ice surface and cause a darker surface and therefore a lower albedo. The darkening effect on the ice surface is cu...
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Language: | English |
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Online Access: | http://hdl.handle.net/2115/59858 https://doi.org/10.5194/tc-9-1845-2015 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/59858 2023-05-15T16:29:10+02:00 Ice sheet mass loss caused by dust and black carbon accumulation Goelles, T. Bøggild, C. E. Greve, R. http://hdl.handle.net/2115/59858 https://doi.org/10.5194/tc-9-1845-2015 eng eng Copernicus Publications on behalf of the European Geosciences Union http://hdl.handle.net/2115/59858 The Cryosphere, 9(5): 1845-1856 http://dx.doi.org/10.5194/tc-9-1845-2015 http://creativecommons.org/licenses/by/3.0/ CC-BY article fthokunivhus https://doi.org/10.5194/tc-9-1845-2015 2022-11-18T01:03:36Z Albedo is the dominant factor governing surface melt variability in the ablation area of ice sheets and glaciers. Aerosols such as mineral dust and black carbon (soot) accumulate on the ice surface and cause a darker surface and therefore a lower albedo. The darkening effect on the ice surface is currently not included in sea level projections, and the effect is unknown. We present a model framework which includes ice dynamics, aerosol transport, aerosol accumulation and the darkening effect on ice albedo and its consequences for surface melt. The model is applied to a simplified geometry resembling the conditions of the Greenland ice sheet, and it is forced by several temperature scenarios to quantify the darkening effect of aerosols on future mass loss. The effect of aerosols depends non-linearly on the temperature rise due to the feedback between aerosol accumulation and surface melt. According to our conceptual model, accounting for black carbon and dust in future projections of ice sheet changes until the year 3000 could induce an additional volume loss of 7 %. Since we have ignored some feedback processes, the impact might be even larger. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Greenland The Cryosphere 9 5 1845 1856 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
description |
Albedo is the dominant factor governing surface melt variability in the ablation area of ice sheets and glaciers. Aerosols such as mineral dust and black carbon (soot) accumulate on the ice surface and cause a darker surface and therefore a lower albedo. The darkening effect on the ice surface is currently not included in sea level projections, and the effect is unknown. We present a model framework which includes ice dynamics, aerosol transport, aerosol accumulation and the darkening effect on ice albedo and its consequences for surface melt. The model is applied to a simplified geometry resembling the conditions of the Greenland ice sheet, and it is forced by several temperature scenarios to quantify the darkening effect of aerosols on future mass loss. The effect of aerosols depends non-linearly on the temperature rise due to the feedback between aerosol accumulation and surface melt. According to our conceptual model, accounting for black carbon and dust in future projections of ice sheet changes until the year 3000 could induce an additional volume loss of 7 %. Since we have ignored some feedback processes, the impact might be even larger. |
format |
Article in Journal/Newspaper |
author |
Goelles, T. Bøggild, C. E. Greve, R. |
spellingShingle |
Goelles, T. Bøggild, C. E. Greve, R. Ice sheet mass loss caused by dust and black carbon accumulation |
author_facet |
Goelles, T. Bøggild, C. E. Greve, R. |
author_sort |
Goelles, T. |
title |
Ice sheet mass loss caused by dust and black carbon accumulation |
title_short |
Ice sheet mass loss caused by dust and black carbon accumulation |
title_full |
Ice sheet mass loss caused by dust and black carbon accumulation |
title_fullStr |
Ice sheet mass loss caused by dust and black carbon accumulation |
title_full_unstemmed |
Ice sheet mass loss caused by dust and black carbon accumulation |
title_sort |
ice sheet mass loss caused by dust and black carbon accumulation |
publisher |
Copernicus Publications on behalf of the European Geosciences Union |
url |
http://hdl.handle.net/2115/59858 https://doi.org/10.5194/tc-9-1845-2015 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_relation |
http://hdl.handle.net/2115/59858 The Cryosphere, 9(5): 1845-1856 http://dx.doi.org/10.5194/tc-9-1845-2015 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-9-1845-2015 |
container_title |
The Cryosphere |
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9 |
container_issue |
5 |
container_start_page |
1845 |
op_container_end_page |
1856 |
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1766018866789482496 |