Arctic climate: changes in sea ice extent outweigh changes in snow cover
Recent declines in Arctic sea ice and snow extent have led to an increase in the absorption of solar energy at the surface, resulting in additional surface heating and a further decline in snow and ice. Using 34 years of satellite data, 1982–2015, we found that the positive trend in solar absorption...
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ftdoajarticles:oai:doaj.org/article:a4444130161c493084ec4035da77475f 2023-05-15T13:10:27+02:00 Arctic climate: changes in sea ice extent outweigh changes in snow cover A. Letterly J. Key Y. Liu 2018-10-01T00:00:00Z https://doi.org/10.5194/tc-12-3373-2018 https://doaj.org/article/a4444130161c493084ec4035da77475f EN eng Copernicus Publications https://www.the-cryosphere.net/12/3373/2018/tc-12-3373-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-3373-2018 1994-0416 1994-0424 https://doaj.org/article/a4444130161c493084ec4035da77475f The Cryosphere, Vol 12, Pp 3373-3382 (2018) Environmental sciences GE1-350 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/tc-12-3373-2018 2022-12-31T04:38:14Z Recent declines in Arctic sea ice and snow extent have led to an increase in the absorption of solar energy at the surface, resulting in additional surface heating and a further decline in snow and ice. Using 34 years of satellite data, 1982–2015, we found that the positive trend in solar absorption over the Arctic Ocean is more than double that over Arctic land, and the magnitude of the ice–albedo feedback is four times that of the snow–albedo feedback in summer. The timing of the high-to-low albedo transition has shifted closer to the greater insolation of the summer solstice over ocean, but further away from the summer solstice over land. Therefore, decreasing sea ice cover, not changes in terrestrial snow cover, has been the dominant radiative feedback mechanism over the last few decades. Article in Journal/Newspaper albedo Arctic Arctic Ocean Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean The Cryosphere 12 10 3373 3382 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. Letterly J. Key Y. Liu Arctic climate: changes in sea ice extent outweigh changes in snow cover |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Recent declines in Arctic sea ice and snow extent have led to an increase in the absorption of solar energy at the surface, resulting in additional surface heating and a further decline in snow and ice. Using 34 years of satellite data, 1982–2015, we found that the positive trend in solar absorption over the Arctic Ocean is more than double that over Arctic land, and the magnitude of the ice–albedo feedback is four times that of the snow–albedo feedback in summer. The timing of the high-to-low albedo transition has shifted closer to the greater insolation of the summer solstice over ocean, but further away from the summer solstice over land. Therefore, decreasing sea ice cover, not changes in terrestrial snow cover, has been the dominant radiative feedback mechanism over the last few decades. |
format |
Article in Journal/Newspaper |
author |
A. Letterly J. Key Y. Liu |
author_facet |
A. Letterly J. Key Y. Liu |
author_sort |
A. Letterly |
title |
Arctic climate: changes in sea ice extent outweigh changes in snow cover |
title_short |
Arctic climate: changes in sea ice extent outweigh changes in snow cover |
title_full |
Arctic climate: changes in sea ice extent outweigh changes in snow cover |
title_fullStr |
Arctic climate: changes in sea ice extent outweigh changes in snow cover |
title_full_unstemmed |
Arctic climate: changes in sea ice extent outweigh changes in snow cover |
title_sort |
arctic climate: changes in sea ice extent outweigh changes in snow cover |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-3373-2018 https://doaj.org/article/a4444130161c493084ec4035da77475f |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
albedo Arctic Arctic Ocean Sea ice The Cryosphere |
genre_facet |
albedo Arctic Arctic Ocean Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 3373-3382 (2018) |
op_relation |
https://www.the-cryosphere.net/12/3373/2018/tc-12-3373-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-3373-2018 1994-0416 1994-0424 https://doaj.org/article/a4444130161c493084ec4035da77475f |
op_doi |
https://doi.org/10.5194/tc-12-3373-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
10 |
container_start_page |
3373 |
op_container_end_page |
3382 |
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