Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach

doi:10.1007/s11430-014-4932-2

IOCAS-IR > 海洋环流与波动重点实验室

	Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach
	Hong XiaoYuan 1,2,4; Hu HaiBo 2,5; Yang XiuQun 2; Zhang Yuan 3; Liu GuoQiang 5; Liu Wei6 ; Hu, HB (reprint author), Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China.
	2014-11-01
发表期刊	SCIENCE CHINA-EARTH SCIENCES
卷号	57 期号:11 页码:2616-2627
文章类型	Article
摘要	Both the tropical Indian and tropical Pacific Oceans are active atmosphere-ocean interactive regions with robust interannual variability, which also constitutes a linkage between the two basins in the mode of variability. Using a global atmosphere-ocean coupled model, we conducted two experiments (CTRL and PC) to explore the contributions of Indian Ocean interannual sea surface temperature (SST) modes to the occurrence of El Nio events. The results show that interannual variability of the SST in the Indian Ocean induces a rapid growth of El Nio events during the boreal autumn in an El Nio developing year. However, it weakens El Nio events or even promotes cold phase conversions in an El Nio decaying year. Therefore, the entire period of the El Nio is shortened by the interannual variations of the Indian Ocean SST. Specifically, during the El Nio developing years, the positive Indian Ocean Dipole (IOD) events force an anomalous Walker circulation, which then enhances the existing westerly wind anomalies over the west Pacific. This will cause a warmer El Nio event, with some modulations by ocean advection and oceanic Rossby and Kelvin waves. However, with the onset of the South Asian monsoon, the Indian Ocean Basin (IOB) warming SST anomalies excite low level easterly wind anomalies over the west tropical Pacific during the El Nio decaying years. As a result, the El Nio event is prompted to change from a warm phase to a cold phase. At the same time, an associated atmospheric anticyclone anomaly appears and leads to a decreasing precipitation anomaly over the northwest Pacific. In summary, with remote forcing in the atmospheric circulation, the IOD mode usually affects the El Nio during the developing years, whereas the IOB mode affects the El Nio during the decaying years.
关键词	Indian Ocean Basin Mode Indian Dipole Mode El Nino Walker Circulation Anomalies
学科领域	Geology
DOI	10.1007/s11430-014-4932-2
收录类别	SCI
语种	英语
WOS记录号	WOS:000344784400005
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/337002/23934
专题	海洋环流与波动重点实验室实验海洋生物学重点实验室
通讯作者	Hu, HB (reprint author), Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing 210044, Jiangsu, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Canada Bedford Inst Oceanog, Dartmouth, NS B2Y 4A2, Canada 6.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Hong XiaoYuan,Hu HaiBo,Yang XiuQun,et al. Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach[J]. SCIENCE CHINA-EARTH SCIENCES,2014,57(11):2616-2627.
APA	Hong XiaoYuan.,Hu HaiBo.,Yang XiuQun.,Zhang Yuan.,Liu GuoQiang.,...&Hu, HB .(2014).Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach.SCIENCE CHINA-EARTH SCIENCES,57(11),2616-2627.
MLA	Hong XiaoYuan,et al."Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach".SCIENCE CHINA-EARTH SCIENCES 57.11(2014):2616-2627.

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