气候变化领域集成服务门户(CCPortal): Atlantic multidecadal variability and associated climate impacts initiated by ocean thermohaline dynamics

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DOI	10.1175/JCLI-D-19-0530.1
	Atlantic multidecadal variability and associated climate impacts initiated by ocean thermohaline dynamics
	Kim W.M.; Yeager S.; Danabasoglu G.
发表日期	2020
ISSN	0894-8755
起始页码	1317
结束页码	1334
卷号	33 期号:4
英文摘要	The sea surface temperature (SST) signature of Atlantic multidecadal variability (AMV) is a key driver of climate variability in surrounding regions. Low-frequency Atlantic meridional overturning circulation (AMOC) variability is often invoked as a key driving mechanism of AMV-related SST anomalies. However, the origins of both AMV and multidecadal AMOC variability remain areas of active research and debate. Here, using coupled ensemble experiments designed to isolate the climate response to buoyancy forcing associated with the North Atlantic Oscillation in the Labrador Sea, we show that ocean dynamical changes are the essential drivers of AMV and related climate impacts. Atmospheric teleconnections also play an important role in rendering the full AMV pattern by transmitting the ocean-driven subpolar SST signal into the rest of the basin, including the tropical North Atlantic. As such, the atmosphere response to the tropical AMV in our experiments is limited to a relatively small area in the Atlantic sector in summertime, suggesting that it could be overestimated in widely adopted protocols for AMV pacemaker experiments. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Surface waters; Tropics; Atlantic meridional overturning circulations; Atmospheric teleconnections; Climate variability; Multidecadal variability; North Atlantic oscillations; Ocean thermohaline; Sea surface temperature (SST); Surrounding regions; Oceanography; air-sea interaction; Atlantic Multidecadal Oscillation; climate effect; North Atlantic Oscillation; sea surface temperature; seasonal variation; thermohaline circulation; Atlantic Ocean; Labrador Sea
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/171441
作者单位	Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Kim W.M.,Yeager S.,Danabasoglu G.. Atlantic multidecadal variability and associated climate impacts initiated by ocean thermohaline dynamics[J],2020,33(4).
APA	Kim W.M.,Yeager S.,&Danabasoglu G..(2020).Atlantic multidecadal variability and associated climate impacts initiated by ocean thermohaline dynamics.Journal of Climate,33(4).
MLA	Kim W.M.,et al."Atlantic multidecadal variability and associated climate impacts initiated by ocean thermohaline dynamics".Journal of Climate 33.4(2020).