气候变化领域集成服务门户(CCPortal): On the variability of the Atlantic meridional overturning circulation transports in coupled CMIP5 simulations

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DOI	10.1007/s00382-018-4529-0
	On the variability of the Atlantic meridional overturning circulation transports in coupled CMIP5 simulations
	Xu X.; Chassignet E.P.; Wang F.
发表日期	2019
ISSN	0930-7575
起始页码	6511
结束页码	6531
卷号	52 期号:11
英文摘要	The Atlantic meridional overturning circulation (AMOC) plays a fundamental role in the climate system, and long-term climate simulations are used to understand the AMOC variability and to assess its impact. This study examines the basic characteristics of the AMOC variability in 44 CMIP5 (Phase 5 of the Coupled Model Inter-comparison Project) simulations, using the 18 atmospherically-forced CORE-II (Phase 2 of the Coordinated Ocean-ice Reference Experiment) simulations as a reference. The analysis shows that on interannual and decadal timescales, the AMOC variability in the CMIP5 exhibits a similar magnitude and meridional coherence as in the CORE-II simulations, indicating that the modeled atmospheric variability responsible for AMOC variability in the CMIP5 is in reasonable agreement with the CORE-II forcing. On multidecadal timescales, however, the AMOC variability is weaker by a factor of more than 2 and meridionally less coherent in the CMIP5 than in the CORE-II simulations. The CMIP5 simulations also exhibit a weaker long-term atmospheric variability in the North Atlantic Oscillation (NAO). However, one cannot fully attribute the weaker AMOC variability to the weaker variability in NAO because, unlike the CORE-II simulations, the CMIP5 simulations do not exhibit a robust NAO-AMOC linkage. While the variability of the wintertime heat flux and mixed layer depth in the western subpolar North Atlantic is strongly linked to the AMOC variability, the NAO variability is not. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	atmosphere-ocean coupling; atmospheric dynamics; atmospheric forcing; climate modeling; computer simulation; meridional circulation; North Atlantic Oscillation; overturn; Atlantic Ocean; Atlantic Ocean (North)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146259
作者单位	Center for Ocean-Atmospheric Prediction Studies (COAPS), Florida State University (FSU), Tallahassee, United States
推荐引用方式 GB/T 7714	Xu X.,Chassignet E.P.,Wang F.. On the variability of the Atlantic meridional overturning circulation transports in coupled CMIP5 simulations[J],2019,52(11).
APA	Xu X.,Chassignet E.P.,&Wang F..(2019).On the variability of the Atlantic meridional overturning circulation transports in coupled CMIP5 simulations.Climate Dynamics,52(11).
MLA	Xu X.,et al."On the variability of the Atlantic meridional overturning circulation transports in coupled CMIP5 simulations".Climate Dynamics 52.11(2019).