气候变化领域集成服务门户(CCPortal): On the Interpretation of the North Atlantic Averaged Sea Surface Temperature

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DOI	10.1175/JCLI-D-19-0158.1
	On the Interpretation of the North Atlantic Averaged Sea Surface Temperature
	Sun J.; Latif M.; Park W.; Park T.
发表日期	2020
ISSN	0894-8755
起始页码	6025
结束页码	6045
卷号	33 期号:14
英文摘要	The North Atlantic (NA) basin-Averaged sea surface temperature (NASST) is often used as an index to study climate variability in the NA sector. However, there is still some debate on what drives it. Based on observations and climate models, an analysis of the different influences on the NASST index and its low-pass filtered version, the Atlantic multidecadal oscillation (AMO) index, is provided. In particular, the relationships of the two indices with some of its mechanistic drivers including the Atlantic meridional overturning circulation (AMOC) are investigated. In observations, the NASST index accounts for significant SST variability over the tropical and subpolar NA. The NASST index is shown to lump together SST variability originating from different mechanisms operating on different time scales. The AMO index emphasizes the subpolar SST variability. In the climate models, the SST-Anomaly pattern associated with the NASST index is similar. The AMO index, however, only represents pronounced SST variability over the extratropical NA, and this variability is significantly linked to the AMOC. There is a sensitivity of this linkage to the cold NA SST bias observed in many climate models. Models suffering from a large cold bias exhibit a relatively weak linkage between the AMOC and AMO and vice versa. Finally, the basin-Averaged SST in its unfiltered form, which has been used to question a strong influence of ocean dynamics on NA SST variability, mixes together multiple types of variability occurring on different time scales and therefore underemphasizes the role of ocean dynamics in the multidecadal variability of NA SSTs. © 2020 American Meteorological Society. All rights reserved.
英文关键词	Atmospheric temperature; Climate models; Low pass filters; Submarine geophysics; Surface properties; Surface waters; Atlantic meridional overturning circulations; Atlantic multidecadal oscillations; Climate variability; Different mechanisms; Different time scale; Multidecadal variability; Ocean dynamics; Sea surface temperature (SST); Oceanography; air-sea interaction; climate modeling; climate variation; data interpretation; meridional circulation; overturn; sea surface temperature; temperature anomaly; Atlantic Ocean; Atlantic Ocean (North)
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/171214
作者单位	GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Ocean University of China, Qingdao, China; GEOMAR Helmholtz Centre for Ocean Research Kiel and University of Kiel, Kiel, Germany; Korea Polar Research Institute, Incheon, South Korea
推荐引用方式 GB/T 7714	Sun J.,Latif M.,Park W.,et al. On the Interpretation of the North Atlantic Averaged Sea Surface Temperature[J],2020,33(14).
APA	Sun J.,Latif M.,Park W.,&Park T..(2020).On the Interpretation of the North Atlantic Averaged Sea Surface Temperature.Journal of Climate,33(14).
MLA	Sun J.,et al."On the Interpretation of the North Atlantic Averaged Sea Surface Temperature".Journal of Climate 33.14(2020).