Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño
Greenland warming and ice loss have slowed down since the early 2010s, in contrast to the rest of the Arctic region. Both natural variability and anthropogenic forcing contribute to recent Greenland warming by reducing cloud cover and surface albedo, yet most climate models are unable to reasonably...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/84071 2023-05-15T13:11:14+02:00 Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño Matsumura, Shinji Yamazaki, Koji Suzuki, Kazuyoshi http://hdl.handle.net/2115/84071 https://doi.org/10.1038/s43247-021-00329-x eng eng Springer Nature http://hdl.handle.net/2115/84071 Communications Earth & Environment, 2: 257 http://dx.doi.org/10.1038/s43247-021-00329-x 451 article fthokunivhus https://doi.org/10.1038/s43247-021-00329-x 2022-11-18T01:06:46Z Greenland warming and ice loss have slowed down since the early 2010s, in contrast to the rest of the Arctic region. Both natural variability and anthropogenic forcing contribute to recent Greenland warming by reducing cloud cover and surface albedo, yet most climate models are unable to reasonably simulate the unforced natural variability. Here we show that a simplified atmospheric circulation model successfully simulates an atmospheric teleconnection from the tropics towards Greenland, which accounts for Greenland cooling through an intensified cyclonic circulation. Synthesis from observational analysis and model experiments indicate that over the last decade, more central Pacific El Nino events than canonical El Nino events have generated the atmospheric teleconnection by shifting the tropical rainfall zone poleward, which led to an intensified cyclonic circulation over Greenland. The intensified cyclonic circulation further extends into the Arctic Ocean in observations, whereas the model does not show a direct remote forcing from the tropics, implying the contribution of an indirect atmospheric forcing. We conclude that the frequent occurrence of central Pacific El Niño events has played a key role in the slow-down of Greenland warming and possibly Arctic sea-ice loss. Article in Journal/Newspaper albedo Arctic Arctic Ocean Greenland Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Arctic Ocean Greenland Pacific Communications Earth & Environment 2 1 |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
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English |
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451 |
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451 Matsumura, Shinji Yamazaki, Koji Suzuki, Kazuyoshi Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño |
topic_facet |
451 |
description |
Greenland warming and ice loss have slowed down since the early 2010s, in contrast to the rest of the Arctic region. Both natural variability and anthropogenic forcing contribute to recent Greenland warming by reducing cloud cover and surface albedo, yet most climate models are unable to reasonably simulate the unforced natural variability. Here we show that a simplified atmospheric circulation model successfully simulates an atmospheric teleconnection from the tropics towards Greenland, which accounts for Greenland cooling through an intensified cyclonic circulation. Synthesis from observational analysis and model experiments indicate that over the last decade, more central Pacific El Nino events than canonical El Nino events have generated the atmospheric teleconnection by shifting the tropical rainfall zone poleward, which led to an intensified cyclonic circulation over Greenland. The intensified cyclonic circulation further extends into the Arctic Ocean in observations, whereas the model does not show a direct remote forcing from the tropics, implying the contribution of an indirect atmospheric forcing. We conclude that the frequent occurrence of central Pacific El Niño events has played a key role in the slow-down of Greenland warming and possibly Arctic sea-ice loss. |
format |
Article in Journal/Newspaper |
author |
Matsumura, Shinji Yamazaki, Koji Suzuki, Kazuyoshi |
author_facet |
Matsumura, Shinji Yamazaki, Koji Suzuki, Kazuyoshi |
author_sort |
Matsumura, Shinji |
title |
Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño |
title_short |
Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño |
title_full |
Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño |
title_fullStr |
Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño |
title_full_unstemmed |
Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Niño |
title_sort |
slow-down in summer warming over greenland in the past decade linked to central pacific el niño |
publisher |
Springer Nature |
url |
http://hdl.handle.net/2115/84071 https://doi.org/10.1038/s43247-021-00329-x |
geographic |
Arctic Arctic Ocean Greenland Pacific |
geographic_facet |
Arctic Arctic Ocean Greenland Pacific |
genre |
albedo Arctic Arctic Ocean Greenland Sea ice |
genre_facet |
albedo Arctic Arctic Ocean Greenland Sea ice |
op_relation |
http://hdl.handle.net/2115/84071 Communications Earth & Environment, 2: 257 http://dx.doi.org/10.1038/s43247-021-00329-x |
op_doi |
https://doi.org/10.1038/s43247-021-00329-x |
container_title |
Communications Earth & Environment |
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2 |
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1 |
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1766246471495057408 |