气候变化领域集成服务门户(CCPortal): Atlantic Niño modulation of the Indian summer monsoon through Asian jet

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DOI	10.1038/s41612-018-0029-5
	Atlantic Niño modulation of the Indian summer monsoon through Asian jet
	Yadav R.K.; Srinivas G.; Chowdary J.S.
发表日期	2018
ISSN	23973722
卷号	1 期号:1
英文摘要	The Indian rainfall and the Atlantic Niño peaks during summer month and have inverse relationship. This relationship has been revisited in the current study and it is found that the Atlantic Niño significantly influences a dipole pattern of rainfall in the north–east and the north-western parts of India. The positive phase of the Atlantic Niño intensifies the inter-tropical convergence zone, as a result of this local tropospheric warming, over the equatorial east Atlantic and west Africa, owing to the enlargement of the upper-troposphere divergence. This provokes meridional stationary wave owing to the stronger meridional transfer of energy, as the influences of background jet-streams are minimal over North Africa and Europe. This results in the consecutive anomalous negative, positive, and negative geopotential heights (GPHs) over the tropical east Atlantic, Mediterranean, and north–west Europe, respectively. The north–west Europe acts as the center of action for the propagation of a Rossby wave train zonally oriented toward central Asia reinforcing positive GPH anomaly over there. The positive GPH anomaly reduces the Asian subtropical westerly jet-stream east of the Caspian Sea, owing to the reduction in the upper-troposphere divergence toward the Indian subcontinent and caused for above (below) normal north–east (north–west) Indian summer monsoon rainfall. The atmospheric general circulation model captures general characteristics of wave pattern and changes in the Asian jet when correlated with Atlantic Niño with considerable skill. © 2018, The Author(s).
语种	英语
scopus关键词	jet stream; monsoon; rainfall; regional climate; summer; tropical environment; troposphere; India
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178190
作者单位	Indian Institute of Tropical Meteorology, Pashan, Pune 411008, India; Department of Meteorology and Oceanography, Andhra University, Visakhapatnam, AP 530 003, India
推荐引用方式 GB/T 7714	Yadav R.K.,Srinivas G.,Chowdary J.S.. Atlantic Niño modulation of the Indian summer monsoon through Asian jet[J],2018,1(1).
APA	Yadav R.K.,Srinivas G.,&Chowdary J.S..(2018).Atlantic Niño modulation of the Indian summer monsoon through Asian jet.npj Climate and Atmospheric Science,1(1).
MLA	Yadav R.K.,et al."Atlantic Niño modulation of the Indian summer monsoon through Asian jet".npj Climate and Atmospheric Science 1.1(2018).