气候变化领域集成服务门户(CCPortal): Variability of the Shallow Overturning Circulation in the Indian Ocean

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DOI	10.1029/2019JC015651
	Variability of the Shallow Overturning Circulation in the Indian Ocean
	Meng L.; Zhuang W.; Zhang W.; Yan C.; Yan X.-H.
发表日期	2020
ISSN	21699275
卷号	125 期号:2
英文摘要	Variability of the Indian Ocean (IO) shallow overturning circulation during 1958–2017 was investigated, which consisted of a cross-equator cell (CEC) and a southern subtropical cell (SSTC). Structures of these shallow cells were examined through the velocity sections and the transport steamfunction patterns based on the newly released Ocean Reanalysis System 5 data set, and the results showed that the returning flows, at the subsurface, of the shallow cells mainly presented at the western boundary while absented in the ocean interior. Strengths of the IO shallow cells were then determined according to the annual-mean meridional streamfunction profiles. Both the CEC and the SSTC exhibited significant variability on interannual to decadal timescales during 1958–2017, and this variability mainly resulted from changes in both meridional Ekman transports and meridional geostrophic flows in the upper layer, and each component could dominate the shallow cells' variations in certain years. Contributions of the geostrophic currents to the shallow cells were likely opposite to that of the Ekman transport in the South Indian Ocean during years when the latter reached the extremes. The CEC and the SSTC were negatively correlated during the research period. The CEC exhibited a decadal weakening during 2000–2015, contributing to the decadal increasing of the IO heat content, while the SSTC only experienced very little strengthening. Here this paper presents a comprehensively study of the interannual to decadal variability of the IO shallow cells and the corresponding reasons and influences and tried to link these variations with other variations in the IO. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	decadal variability; Indian Ocean; interannual variability; meridional flows; ocean circulation
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186982
作者单位	State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; Joint Center for Ocean Remote Sensing, University of Delaware-Xiamen University, Newark, DE, United States; College of Earth, Ocean, and Environment, University of Delaware, Newark, DE, United States; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Meng L.,Zhuang W.,Zhang W.,et al. Variability of the Shallow Overturning Circulation in the Indian Ocean[J],2020,125(2).
APA	Meng L.,Zhuang W.,Zhang W.,Yan C.,&Yan X.-H..(2020).Variability of the Shallow Overturning Circulation in the Indian Ocean.Journal of Geophysical Research: Oceans,125(2).
MLA	Meng L.,et al."Variability of the Shallow Overturning Circulation in the Indian Ocean".Journal of Geophysical Research: Oceans 125.2(2020).