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

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DOI	10.1175/JCLI-D-19-0206.1
	Investigating the role of the tibetan plateau in the formation of pacific meridional overturning circulation
	Wen Q.; Yang H.
发表日期	2020
ISSN	0894-8755
起始页码	3603
结束页码	3617
卷号	33 期号:9
英文摘要	The effects of the Tibetan Plateau (TP) on the Pacific Ocean circulation are investigated using a fully coupled climate model. Sensitivity experiments are designed to demonstrate that the presence of the TP is the reason for the lack of strong deep water formation in the subpolar North Pacific, because removing the TP in the model would enable the establishment of the Pacific meridional overturning circulation (PMOC). The processes involved are described in detail as follows. Removing the TP in the model would excite an anomalous high pressure over the subpolar North Pacific, causing anomalous Ekman downwelling that enhances surface water subduction north of 408N. Removing the TP would also lead to less freshwater flux into the western Pacific, increasing sea surface salinity over the region. The high-salinity surface water can then be advected northward and eastward by the Kuroshio and its extension, subducting along the 26–27su isopycnal surfaces to the deeper ocean, which enables the formation of deep water in the North Pacific and the setup of the PMOC. Afterward, more high-salinity warm water would be transported from the tropics to the extratropics by the Kuroshio, leading to the establishment of the PMOC. The role of the Rocky Mountains is also examined in this study. We conclude that the Rocky Mountains may play a trivial role in modulating the meridional overturning circulations in both the Pacific and Atlantic Oceans. © 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	Climate models; Ocean currents; Deep-water formation; Freshwater fluxes; Isopycnal surfaces; Meridional overturning circulations; Pacific meridional overturning circulation; Rocky Mountains; Sea surface salinity; Tibetan Plateau; Surface waters; air-sea interaction; climate modeling; downwelling; Ekman transport; high pressure; meridional circulation; overturn; salinity; Atlantic Ocean; China; Kuroshio Current; Pacific Ocean; Pacific Ocean (North); 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/171348
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	Wen Q.,Yang H.. Investigating the role of the tibetan plateau in the formation of pacific meridional overturning circulation[J],2020,33(9).
APA	Wen Q.,&Yang H..(2020).Investigating the role of the tibetan plateau in the formation of pacific meridional overturning circulation.Journal of Climate,33(9).
MLA	Wen Q.,et al."Investigating the role of the tibetan plateau in the formation of pacific meridional overturning circulation".Journal of Climate 33.9(2020).