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  1. 防災科研関係論文

Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Nino

https://nied-repo.bosai.go.jp/records/6049
https://nied-repo.bosai.go.jp/records/6049
edd43481-bf6e-4da6-856f-76f055c00416
Item type researchmap(1)
公開日 2023-04-27
タイトル
言語 en
タイトル Slow-down in summer warming over Greenland in the past decade linked to central Pacific El Nino
言語
言語 eng
著者 Shinji Matsumura

× Shinji Matsumura

en Shinji Matsumura

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Koji Yamazaki

× Koji Yamazaki

en Koji Yamazaki

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Kazuyoshi Suzuki

× Kazuyoshi Suzuki

en Kazuyoshi Suzuki

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抄録
内容記述タイプ Other
内容記述 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 Nino events has played a key role in the slow-down of Greenland warming and possibly Arctic sea-ice loss.
言語 en
書誌情報 en : COMMUNICATIONS EARTH & ENVIRONMENT

巻 2, 号 1, 発行日 2021-12
出版者
言語 en
出版者 SPRINGERNATURE
ISSN
収録物識別子タイプ EISSN
収録物識別子 2662-4435
DOI
関連識別子 10.1038/s43247-021-00329-x
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