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Memory effects of Eurasian land processes cause enhanced cooling in response to sea ice loss

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Title: Memory effects of Eurasian land processes cause enhanced cooling in response to sea ice loss
Authors: Nakamura, Tetsu Browse this author →KAKEN DB
Yamazaki, Koji Browse this author
Sato, Tomonori Browse this author →KAKEN DB
Ukita, Jinro Browse this author
Issue Date: 8-Nov-2019
Publisher: Nature Publishing Group
Journal Title: Nature communications
Volume: 10
Start Page: 5111
Publisher DOI: 10.1038/s41467-019-13124-2
Abstract: Amplified Arctic warming and its relevance to mid-latitude cooling in winter have been intensively studied. Observational evidence has shown strong connections between decreasing sea ice and cooling over the Siberian/East Asian regions. However, the robustness of such connections remains a matter of discussion because modeling studies have shown divergent and controversial results. Here, we report a set of general circulation model experiments specifically designed to extract memory effects of land processes that can amplify sea ice-climate impacts. The results show that sea ice-induced cooling anomalies over the Eurasian continent are memorized in the snow amount and soil temperature fields, and they reemerge in the following winters to enhance negative Arctic Oscillation-like anomalies. The contribution from this memory effect is similar in magnitude to the direct effect of sea ice loss. The results emphasize the essential role of land processes in understanding and evaluating the Arctic-mid-latitude climate linkage.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/76299
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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