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

Earth Sciences

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

S. Matsumura, K. Yamazaki, et al.

Discover groundbreaking insights as Shinji Matsumura, Koji Yamazaki, and Kazuyoshi Suzuki reveal how intensified cyclonic circulation and Central Pacific El Niño events have influenced the recent slowdown in Greenland's warming and Arctic sea-ice loss. This study uncovers the atmospheric connections that challenge the prevailing narratives of climate change in the Arctic.

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Playback language: English
Abstract
Greenland warming and ice loss have slowed down since the early 2010s, contrasting with the rest of the Arctic. This study shows that a simplified atmospheric circulation model successfully simulates an atmospheric teleconnection from the tropics to Greenland, explaining Greenland's cooling through intensified cyclonic circulation. Analysis indicates that more Central Pacific El Niño events over the last decade generated this teleconnection by shifting the tropical rainfall zone poleward. The intensified cyclonic circulation extends into the Arctic Ocean, suggesting indirect atmospheric forcing. Frequent Central Pacific El Niño events played a key role in the slowdown of Greenland warming and possibly Arctic sea-ice loss.
Publisher
Communications Earth & Environment
Published On
Dec 16, 2021
Authors
Shinji Matsumura, Koji Yamazaki, Kazuyoshi Suzuki
Tags
Greenland warming
ice loss
atmospheric circulation
Central Pacific El Niño
cyclonic circulation
Arctic sea-ice
teleconnection

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