Intraseasonal variability of the surface zonal current in the equatorial Indian Ocean: Seasonal differences and causes

doi:10.1007/s13131-021-1935-7

IOCAS-IR > 海洋环流与波动重点实验室

	Intraseasonal variability of the surface zonal current in the equatorial Indian Ocean: Seasonal differences and causes
	Zhong, Qingwen 1,3; Chen, Gengxin 1,2,4; Li, Yuanlong 5; Peng, Qihua 1; Chu, Xiaoqing 1,2
	2022-05-01
发表期刊	ACTA OCEANOLOGICA SINICA
ISSN	0253-505X
卷号	41 期号:5 页码:12-26
通讯作者	Chu, Xiaoqing(chuxq@scsio.ac.cn)
摘要	Using observations and numerical simulations, this study examines the intraseasonal variability of the surface zonal current (u ISV) over the equatorial Indian Ocean, highlighting the seasonal and spatial differences, and the causes of the differences. Large-amplitude u ISV occurs in the eastern basin at around 80 degrees-90 degrees E and near the western boundary at 45 degrees-55 degrees E. In the eastern basin, the u ISV is mainly caused by the atmospheric intraseasonal oscillations (ISOs), which explains 91% of the standard deviation of the total u ISV. Further analysis suggests that it takes less than ten days for the intraseasonal zonal wind stress to generate the u ISV through the directly forced Kelvin and Rossby waves. Driven by the stronger zonal wind stress associated with the Indian summer monsoon ISO (MISO), the eastern u ISV in boreal summer (May to October) is about 1.5 times larger than that in boreal winter (November to April). In the western basin, both the atmospheric ISOs and the oceanic internal instabilities contribute substantially to the u ISV, and induce stronger u ISV in boreal summer. Energy budget analysis suggests that the mean flow converts energy to the intraseasonal current mainly through barotropic instabilities.
关键词	equatorial zonal current intraseasonal variability seasonal difference wind stress associated with the MISO and MJO
DOI	10.1007/s13131-021-1935-7
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41822602] ; National Natural Science Foundation of China[41976016] ; National Natural Science Foundation of China[4207602] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20060502] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA15020901] ; Guangdong Basic and Applied Basic Research Foundation[2021A1515011534] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0302] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0306] ; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences[ISEE2021ZD01] ; State Key Laboratory of Tropical Oceanography[LTOZZ2002] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[Y2021093]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000809359600002
出版者	SPRINGER
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/179519
专题	海洋环流与波动重点实验室
通讯作者	Chu, Xiaoqing
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510075, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266237, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhong, Qingwen,Chen, Gengxin,Li, Yuanlong,et al. Intraseasonal variability of the surface zonal current in the equatorial Indian Ocean: Seasonal differences and causes[J]. ACTA OCEANOLOGICA SINICA,2022,41(5):12-26.
APA	Zhong, Qingwen,Chen, Gengxin,Li, Yuanlong,Peng, Qihua,&Chu, Xiaoqing.(2022).Intraseasonal variability of the surface zonal current in the equatorial Indian Ocean: Seasonal differences and causes.ACTA OCEANOLOGICA SINICA,41(5),12-26.
MLA	Zhong, Qingwen,et al."Intraseasonal variability of the surface zonal current in the equatorial Indian Ocean: Seasonal differences and causes".ACTA OCEANOLOGICA SINICA 41.5(2022):12-26.

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