气候变化领域集成服务门户(CCPortal): Investigating the role of the tibetan plateau in the formation of atlantic meridional overturning circulation

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DOI	10.1175/JCLI-D-19-0205.1
	Investigating the role of the tibetan plateau in the formation of atlantic meridional overturning circulation
	Yang H.; Wen Q.
发表日期	2020
ISSN	0894-8755
起始页码	3585
结束页码	3601
卷号	33 期号:9
英文摘要	The Tibetan Plateau (TP) over the Eurasian continent has significant effects on both regional and global climate. It can even affect the remote Atlantic meridional overturning circulation (AMOC), as shown in this study. Through coupled modeling experiments, we demonstrate that removing the TP immediately weakens the meridional wind over East Asia, resulting in stronger westerlies in the midlatitudes. The stronger westerlies enhance the southward Ekman flow and surface latent and sensible heat losses in the subpolar North Atlantic, cooling the surface ocean and leading to stronger North Atlantic deep-water formation and stronger AMOC during the first few decades after the TP removal. At the same time, accompanying the weakened trade winds in the tropical Pacific, more moisture is transported from the tropical Pacific to the North Atlantic, freshening the surface ocean and triggering a weakening of the AMOC. The AMOC weakening in turn results in southward expansion and melting of sea ice, providing more freshwater to the North Atlantic, which furthers the weakening of the AMOC. The positive feedback between the AMOC and sea ice eventually leads to AMOC shutdown. We illustrate that there would be no AMOC without the TP. These results call for a revisiting of how ocean circulation and global climate may have responded to the TP uplift and other tectonic changes on the geological time scale. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Sea ice; Tropics; Atlantic meridional overturning circulations; Coupled modeling; Meridional winds; North atlantic deep water formations; Ocean circulation; Subpolar North Atlantic; Tectonic changes; Tibetan Plateau; Oceanography; atmospheric circulation; atmospheric transport; Ekman transport; meridional circulation; overturn; trade wind; westerly; Atlantic Ocean; Atlantic Ocean (North); China; Pacific Ocean; Pacific Ocean (Tropical); Qinghai-Xizang Plateau
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171342
作者单位	Laboratory for Climate and Ocean–Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
推荐引用方式 GB/T 7714	Yang H.,Wen Q.. Investigating the role of the tibetan plateau in the formation of atlantic meridional overturning circulation[J],2020,33(9).
APA	Yang H.,&Wen Q..(2020).Investigating the role of the tibetan plateau in the formation of atlantic meridional overturning circulation.Journal of Climate,33(9).
MLA	Yang H.,et al."Investigating the role of the tibetan plateau in the formation of atlantic meridional overturning circulation".Journal of Climate 33.9(2020).