Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings
The Warm Arctic–cold Siberia surface temperature pattern during recent boreal winter is suggested to be triggered by the ongoing decrease of Arctic autumn sea ice concentration and has been observed together with an increase in mid-latitude extreme events and a meridionalization of tropospheric circ...
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Online Access: | http://hdl.handle.net/11250/2487751 https://doi.org/10.1088/1748-9326/aaa0b7 |
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ftnilu:oai:nilu.brage.unit.no:11250/2487751 2023-07-30T04:00:21+02:00 Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings Wegmann, Martin Orsolini, Yvan Zolina, Olga 2018 application/pdf http://hdl.handle.net/11250/2487751 https://doi.org/10.1088/1748-9326/aaa0b7 eng eng NILU - Norsk institutt for luftforskning: 115089 Norges forskningsråd: 244166 urn:issn:1748-9326 http://hdl.handle.net/11250/2487751 https://doi.org/10.1088/1748-9326/aaa0b7 cristin:1562056 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2018 The Author(s). Published by IOP Publishing Ltd 13 Environmental Research Letters Journal article Peer reviewed 2018 ftnilu https://doi.org/10.1088/1748-9326/aaa0b7 2023-07-08T19:54:16Z The Warm Arctic–cold Siberia surface temperature pattern during recent boreal winter is suggested to be triggered by the ongoing decrease of Arctic autumn sea ice concentration and has been observed together with an increase in mid-latitude extreme events and a meridionalization of tropospheric circulation. However, the exact mechanism behind this dipole temperature pattern is still under debate, since model experiments with reduced sea ice show conflicting results. We use the early twentieth-century Arctic warming (ETCAW) as a case study to investigate the link between September sea ice in the Barents–Kara Sea (BKS) and the Siberian temperature evolution. Analyzing a variety of long-term climate reanalyses, we find that the overall winter temperature and heat flux trend occurs with the reduction of September BKS sea ice. Tropospheric conditions show a strengthened atmospheric blocking over the BKS, strengthening the advection of cold air from the Arctic to central Siberia on its eastern flank, together with a reduction of warm air advection by the westerlies. This setup is valid for both the ETCAW and the current Arctic warming period. publishedVersion Article in Journal/Newspaper Arctic Kara Sea Sea ice Siberia NILU – Norwegian Institute for Air Research: NILU Brage Arctic Kara Sea Environmental Research Letters 13 2 025009 |
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Open Polar |
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NILU – Norwegian Institute for Air Research: NILU Brage |
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ftnilu |
language |
English |
description |
The Warm Arctic–cold Siberia surface temperature pattern during recent boreal winter is suggested to be triggered by the ongoing decrease of Arctic autumn sea ice concentration and has been observed together with an increase in mid-latitude extreme events and a meridionalization of tropospheric circulation. However, the exact mechanism behind this dipole temperature pattern is still under debate, since model experiments with reduced sea ice show conflicting results. We use the early twentieth-century Arctic warming (ETCAW) as a case study to investigate the link between September sea ice in the Barents–Kara Sea (BKS) and the Siberian temperature evolution. Analyzing a variety of long-term climate reanalyses, we find that the overall winter temperature and heat flux trend occurs with the reduction of September BKS sea ice. Tropospheric conditions show a strengthened atmospheric blocking over the BKS, strengthening the advection of cold air from the Arctic to central Siberia on its eastern flank, together with a reduction of warm air advection by the westerlies. This setup is valid for both the ETCAW and the current Arctic warming period. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Wegmann, Martin Orsolini, Yvan Zolina, Olga |
spellingShingle |
Wegmann, Martin Orsolini, Yvan Zolina, Olga Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings |
author_facet |
Wegmann, Martin Orsolini, Yvan Zolina, Olga |
author_sort |
Wegmann, Martin |
title |
Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings |
title_short |
Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings |
title_full |
Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings |
title_fullStr |
Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings |
title_full_unstemmed |
Warm Arctic–cold Siberia: comparing the recent and the early 20th century Arctic warmings |
title_sort |
warm arctic–cold siberia: comparing the recent and the early 20th century arctic warmings |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2487751 https://doi.org/10.1088/1748-9326/aaa0b7 |
geographic |
Arctic Kara Sea |
geographic_facet |
Arctic Kara Sea |
genre |
Arctic Kara Sea Sea ice Siberia |
genre_facet |
Arctic Kara Sea Sea ice Siberia |
op_source |
13 Environmental Research Letters |
op_relation |
NILU - Norsk institutt for luftforskning: 115089 Norges forskningsråd: 244166 urn:issn:1748-9326 http://hdl.handle.net/11250/2487751 https://doi.org/10.1088/1748-9326/aaa0b7 cristin:1562056 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2018 The Author(s). Published by IOP Publishing Ltd |
op_doi |
https://doi.org/10.1088/1748-9326/aaa0b7 |
container_title |
Environmental Research Letters |
container_volume |
13 |
container_issue |
2 |
container_start_page |
025009 |
_version_ |
1772810859525963776 |