Intensification and Dynamics of the Westward Equatorial Undercurrent During the Summers of 1998 and 2016 in the Indian Ocean

doi:10.1029/2022GL100168

IOCAS-IR > 海洋环流与波动重点实验室

	Intensification and Dynamics of the Westward Equatorial Undercurrent During the Summers of 1998 and 2016 in the Indian Ocean
	Huang, Ke 1,2,3; Wang, Dongxiao 4,5; Chen, Gengxin 1,3; Nagura, Motoki 6; Han, Weiqing 7; McPhaden, Michael J.8; Feng, Ming 9; Chen, Ju 1; Wu, Ying 10; Zhang, Xiaolin 11; Li, Yuanlong 12; Xie, Qiang 13; Wang, Weiqiang 1,3; Zhou, Feng 2
	2022-10-28
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	49 期号:20 页码:11
通讯作者	Wang, Dongxiao([email protected]) ; Chen, Ju([email protected])
摘要	Using mooring observations and reanalysis, we show that anomalously strong westward Equatorial Undercurrent (wEUC) developed in June-July in 2016 and 1998 in the Indian Ocean, which coincided with extreme Indian Ocean Dipole (IOD) and El Nino events. Simulations show that equatorial Kelvin and Rossby waves were excited by winds associated with El Nino and positive IOD events during 2015 and 1997, and their negative phases during 2016 and 1998. The constructive relationship between the delayed-time contributions of eastern-boundary-reflected-waves that excited by the easterlies in 2015 and 1997 and the direct contributions of wind-forced-waves that excited by the westerlies in 2016 and 1998 resulted in the intensified wEUC. Slow intermediate-order baroclinic-modes, rather than fast low-order baroclinic-modes, dominated the strong wEUC. The eastern-boundary-reflected-waves dominated in 1997-1998 and directly wind-forced-waves dominated in 2015-2016. Our results emphasize the importance of constructive interactions of the directly-wind-forced and boundary-reflected waves in driving the interannual variability of Indian Ocean wEUC.
关键词	equatorial undercurrent tropical Indian Ocean equatorial dynamic Indian Ocean Dipole baroclinic waves equatorial waves
DOI	10.1029/2022GL100168
收录类别	SCI
语种	英语
资助项目	Second Tibetan Plateau Scientific Expedition and Research program[2019QZKK0102]; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20060502]; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000]; National Natural Science foundation of China[41976016]; National Natural Science foundation of China[42076021]; National Natural Science foundation of China[42230402]; National Natural Science foundation of China[42176026]; National Natural Science foundation of China[41976024]; National Natural Science foundation of China[41906147]; National Natural Science foundation of China[42276022]; National Natural Science foundation of China[41876017]; Guangdong Basic and Applied Basic Research Foundation[2021A1515011534]; Youth Innovation Promotion Association CAS[Y2021093]; Joint Advanced Marine and Ecological Studies (JAMES) project of the Global Change and Air-Sea interaction II Program[GASI-04-WLHY-03]; State Key Laboratory of Tropical Oceanography[LTOZZ2002]; State Key Laboratory of Tropical Oceanography[LTOZZ2101]; State Key Laboratory of Satellite Ocean Environment Dynamics, SIO, MNR[QNHX2203]; China-Sri Lanka Joint Center for Education & Research, Chinese Academy of Sciences; High-Performance Computing Division
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000871467400001
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：3[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/337002/180549
专题	海洋环流与波动重点实验室
通讯作者	Wang, Dongxiao; Chen, Ju
作者单位	1.South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 2.Minist Nat Resources, State Key Lab Satellite Ocean Environm Dynam, Inst Oceanog 2, Hangzhou, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China 4.Sun Yat Sen Univ, Sch Marine Sci, Zhuhai, Peoples R China 5.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 6.Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa, Japan 7.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA 8.NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way Ne, Seattle, WA 98115 USA 9.CSIRO Oceans & Atmosphere, Crawley, WA, Australia 10.East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai, Peoples R China 11.Kyushu Univ, Fukuoka, Japan 12.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 13.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, 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	Huang, Ke,Wang, Dongxiao,Chen, Gengxin,et al. Intensification and Dynamics of the Westward Equatorial Undercurrent During the Summers of 1998 and 2016 in the Indian Ocean[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(20):11.
APA	Huang, Ke.,Wang, Dongxiao.,Chen, Gengxin.,Nagura, Motoki.,Han, Weiqing.,...&Zhou, Feng.(2022).Intensification and Dynamics of the Westward Equatorial Undercurrent During the Summers of 1998 and 2016 in the Indian Ocean.GEOPHYSICAL RESEARCH LETTERS,49(20),11.
MLA	Huang, Ke,et al."Intensification and Dynamics of the Westward Equatorial Undercurrent During the Summers of 1998 and 2016 in the Indian Ocean".GEOPHYSICAL RESEARCH LETTERS 49.20(2022):11.

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