Summer Arctic sea ice albedo in CMIP5 models
Spatial and temporal variations of summer sea ice albedo over the Arctic are analyzed using an ensemble of historical CMIP5 model simulations. The results are compared to the CLARA-SAL product that is based on long-term satellite observations. The summer sea ice albedo varies substantially among CMI...
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Klimatforskning - Rossby Centre
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ftsmhi:oai:DiVA.org:smhi-163 2023-05-15T13:10:25+02:00 Summer Arctic sea ice albedo in CMIP5 models Koenigk, Torben Devasthale, Abhay Karlsson, Karl-Göran 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-163 https://doi.org/10.5194/acp-14-1987-2014 eng eng Klimatforskning - Rossby Centre Atmosfärisk fjärranalys Atmospheric Chemistry And Physics, 1680-7316, 2014, 14:4, s. 1987-1998 http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-163 doi:10.5194/acp-14-1987-2014 ISI:000332386100015 info:eu-repo/semantics/openAccess Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2014 ftsmhi https://doi.org/10.5194/acp-14-1987-2014 2022-12-09T10:06:08Z Spatial and temporal variations of summer sea ice albedo over the Arctic are analyzed using an ensemble of historical CMIP5 model simulations. The results are compared to the CLARA-SAL product that is based on long-term satellite observations. The summer sea ice albedo varies substantially among CMIP5 models, and many models show large biases compared to the CLARA-SAL product. Single summer months show an extreme spread of ice albedo among models; July values vary between 0.3 and 0.7 for individual models. The CMIP5 ensemble mean, however, agrees relatively well in the central Arctic but shows too high ice albedo near the ice edges and coasts. In most models, the ice albedo is spatially too uniformly distributed. The summer-to-summer variations seem to be underestimated in many global models, and almost no model is able to reproduce the temporal evolution of ice albedo throughout the summer fully. While the satellite observations indicate the lowest ice albedos during August, the models show minimum values in July and substantially higher values in August. Instead, the June values are often lower in the models than in the satellite observations. This is probably due to too high surface temperatures in June, leading to an early start of the melt season and too cold temperatures in August causing an earlier refreezing in the models. The summer sea ice albedo in the CMIP5 models is strongly governed by surface temperature and snow conditions, particularly during the period of melt onset in early summer and refreezing in late summer. The summer surface net solar radiation of the ice-covered Arctic areas is highly related to the ice albedo in the CMIP5 models. However, the impact of the ice albedo on the sea ice conditions in the CMIP5 models is not clearly visible. This indicates the importance of other Arctic and large-scale processes for the sea ice conditions. Article in Journal/Newspaper albedo Arctic Sea ice SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA) Arctic Atmospheric Chemistry and Physics 14 4 1987 1998 |
institution |
Open Polar |
collection |
SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA) |
op_collection_id |
ftsmhi |
language |
English |
topic |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Koenigk, Torben Devasthale, Abhay Karlsson, Karl-Göran Summer Arctic sea ice albedo in CMIP5 models |
topic_facet |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
description |
Spatial and temporal variations of summer sea ice albedo over the Arctic are analyzed using an ensemble of historical CMIP5 model simulations. The results are compared to the CLARA-SAL product that is based on long-term satellite observations. The summer sea ice albedo varies substantially among CMIP5 models, and many models show large biases compared to the CLARA-SAL product. Single summer months show an extreme spread of ice albedo among models; July values vary between 0.3 and 0.7 for individual models. The CMIP5 ensemble mean, however, agrees relatively well in the central Arctic but shows too high ice albedo near the ice edges and coasts. In most models, the ice albedo is spatially too uniformly distributed. The summer-to-summer variations seem to be underestimated in many global models, and almost no model is able to reproduce the temporal evolution of ice albedo throughout the summer fully. While the satellite observations indicate the lowest ice albedos during August, the models show minimum values in July and substantially higher values in August. Instead, the June values are often lower in the models than in the satellite observations. This is probably due to too high surface temperatures in June, leading to an early start of the melt season and too cold temperatures in August causing an earlier refreezing in the models. The summer sea ice albedo in the CMIP5 models is strongly governed by surface temperature and snow conditions, particularly during the period of melt onset in early summer and refreezing in late summer. The summer surface net solar radiation of the ice-covered Arctic areas is highly related to the ice albedo in the CMIP5 models. However, the impact of the ice albedo on the sea ice conditions in the CMIP5 models is not clearly visible. This indicates the importance of other Arctic and large-scale processes for the sea ice conditions. |
format |
Article in Journal/Newspaper |
author |
Koenigk, Torben Devasthale, Abhay Karlsson, Karl-Göran |
author_facet |
Koenigk, Torben Devasthale, Abhay Karlsson, Karl-Göran |
author_sort |
Koenigk, Torben |
title |
Summer Arctic sea ice albedo in CMIP5 models |
title_short |
Summer Arctic sea ice albedo in CMIP5 models |
title_full |
Summer Arctic sea ice albedo in CMIP5 models |
title_fullStr |
Summer Arctic sea ice albedo in CMIP5 models |
title_full_unstemmed |
Summer Arctic sea ice albedo in CMIP5 models |
title_sort |
summer arctic sea ice albedo in cmip5 models |
publisher |
Klimatforskning - Rossby Centre |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-163 https://doi.org/10.5194/acp-14-1987-2014 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Sea ice |
genre_facet |
albedo Arctic Sea ice |
op_relation |
Atmospheric Chemistry And Physics, 1680-7316, 2014, 14:4, s. 1987-1998 http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-163 doi:10.5194/acp-14-1987-2014 ISI:000332386100015 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-14-1987-2014 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
14 |
container_issue |
4 |
container_start_page |
1987 |
op_container_end_page |
1998 |
_version_ |
1766229056853901312 |