气候变化领域集成服务门户(CCPortal): The roles of tropical and subtropical wind stress anomalies in the El Niño Modoki onset

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DOI	10.1007/s00382-018-4534-3
	The roles of tropical and subtropical wind stress anomalies in the El Niño Modoki onset
	Wang X.; Guan C.; Huang R.X.; Tan W.; Wang L.
发表日期	2019
ISSN	0930-7575
起始页码	6585
结束页码	6597
卷号	52 期号:11
英文摘要	The El Niño Modoki is separated into two types, El Niño Modoki I and El Niño Modoki II, which are characterized by substantially different mechanism. According to comparisons between the evolution of air-sea coupled processes and heat budget analyses, this study discovered the distinct dynamical mechanism of the onset of El Niño Modoki II compared to that of El Niño Modoki I. For El Niño Modoki I, westerly wind anomalies in the western Pacific appear earlier than warm sea surface temperature (SST) anomalies in the central tropical Pacific; in addition, zonal advection is responsible for changes in mixed-layer temperature in the Niño-4 region during the developing phase in spring and summer. However, warm SST anomalies accompany easterly anomalies in the central tropical Pacific, and there are no westerly anomalies in the western tropical Pacific during the developing phase in spring and summer for El Niño Modoki II. For El Niño Modoki II, Ekman feedback is the major contributor to changes in mixed-layer temperature. According to reanalysis data, the 2.5-layer model results and coupled model simulations, anomalous westerly wind stress in the subtropical North Pacific and easterly wind stress in the central–eastern tropical Pacific can lead to equatorward and westward oceanic current anomalies, thus enhancing meridional and zonal convergences at upper layer. Because anomalous convergence at upper layer can inhibit upwelling motion in the central tropical Pacific, SST anomalies in the central tropical Pacific tend to be warm, even without anomalous westerlies in the western Pacific. © 2018, The Author(s).
英文关键词	Ekman feedback; El Niño Modoki; Northern subtropical Pacific
语种	英语
scopus关键词	atmosphere-ocean coupling; climate feedback; El Nino; oceanic current; sea surface temperature; temperature anomaly; westerly; wind stress; Pacific Ocean; Pacific Ocean (North); Pacific Ocean (Tropical); Pacific Ocean (West)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146255
作者单位	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Rd., Guangzhou, 510301, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; First Institute of Oceanography, State Oceanic Administration, Qingdao, China; Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, Department of Oceanography, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, China
推荐引用方式 GB/T 7714	Wang X.,Guan C.,Huang R.X.,et al. The roles of tropical and subtropical wind stress anomalies in the El Niño Modoki onset[J],2019,52(11).
APA	Wang X.,Guan C.,Huang R.X.,Tan W.,&Wang L..(2019).The roles of tropical and subtropical wind stress anomalies in the El Niño Modoki onset.Climate Dynamics,52(11).
MLA	Wang X.,et al."The roles of tropical and subtropical wind stress anomalies in the El Niño Modoki onset".Climate Dynamics 52.11(2019).