Arctic-Eurasian climate linkage induced by tropical ocean variability
Eurasian continent has experienced cold winters over the past two decades in contrast with Arctic warming. Previous studies have suggested that the cold Eurasian winters are associated with Arctic sea-ice loss, while others attributed them to atmospheric internal variability. However, here we show t...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/75387 2023-05-15T14:32:40+02:00 Arctic-Eurasian climate linkage induced by tropical ocean variability Matsumura, Shinji Kosaka, Yu http://hdl.handle.net/2115/75387 https://doi.org/10.1038/s41467-019-11359-7 eng eng Nature Publishing Group http://hdl.handle.net/2115/75387 Nature communications, 10: 3441 http://dx.doi.org/10.1038/s41467-019-11359-7 http://creativecommons.org/licenses/by/4.0/ CC-BY 450 article fthokunivhus https://doi.org/10.1038/s41467-019-11359-7 2022-11-18T01:05:33Z Eurasian continent has experienced cold winters over the past two decades in contrast with Arctic warming. Previous studies have suggested that the cold Eurasian winters are associated with Arctic sea-ice loss, while others attributed them to atmospheric internal variability. However, here we show that the Arctic and Eurasian climate linkage is driven by the combination between atmospheric teleconnection originating in the tropical oceans and Arctic sea ice. Like a battery charges a capacitor, El Nino heats the tropical Atlantic, and the warmer Atlantic condition persists until early winter of El Nino-decay year. We find that the persisting tropical Atlantic warming induces anomalous Rossby wave train arching to Eurasia, leading to Arctic sea-ice increase and Eurasian warming. In La Nina phase these changes are reversed. Our results therefore suggest that the combination of recent tropical Pacific cooling and Arctic sea-ice loss have contributed to the frequent Eurasian cold winters. Article in Journal/Newspaper Arctic Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Pacific Nature Communications 10 1 |
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Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
450 |
spellingShingle |
450 Matsumura, Shinji Kosaka, Yu Arctic-Eurasian climate linkage induced by tropical ocean variability |
topic_facet |
450 |
description |
Eurasian continent has experienced cold winters over the past two decades in contrast with Arctic warming. Previous studies have suggested that the cold Eurasian winters are associated with Arctic sea-ice loss, while others attributed them to atmospheric internal variability. However, here we show that the Arctic and Eurasian climate linkage is driven by the combination between atmospheric teleconnection originating in the tropical oceans and Arctic sea ice. Like a battery charges a capacitor, El Nino heats the tropical Atlantic, and the warmer Atlantic condition persists until early winter of El Nino-decay year. We find that the persisting tropical Atlantic warming induces anomalous Rossby wave train arching to Eurasia, leading to Arctic sea-ice increase and Eurasian warming. In La Nina phase these changes are reversed. Our results therefore suggest that the combination of recent tropical Pacific cooling and Arctic sea-ice loss have contributed to the frequent Eurasian cold winters. |
format |
Article in Journal/Newspaper |
author |
Matsumura, Shinji Kosaka, Yu |
author_facet |
Matsumura, Shinji Kosaka, Yu |
author_sort |
Matsumura, Shinji |
title |
Arctic-Eurasian climate linkage induced by tropical ocean variability |
title_short |
Arctic-Eurasian climate linkage induced by tropical ocean variability |
title_full |
Arctic-Eurasian climate linkage induced by tropical ocean variability |
title_fullStr |
Arctic-Eurasian climate linkage induced by tropical ocean variability |
title_full_unstemmed |
Arctic-Eurasian climate linkage induced by tropical ocean variability |
title_sort |
arctic-eurasian climate linkage induced by tropical ocean variability |
publisher |
Nature Publishing Group |
url |
http://hdl.handle.net/2115/75387 https://doi.org/10.1038/s41467-019-11359-7 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
http://hdl.handle.net/2115/75387 Nature communications, 10: 3441 http://dx.doi.org/10.1038/s41467-019-11359-7 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-019-11359-7 |
container_title |
Nature Communications |
container_volume |
10 |
container_issue |
1 |
_version_ |
1766306043686551552 |