气候变化领域集成服务门户(CCPortal): Role of changed Indo-Pacific atmospheric circulation in the recent disconnect between the Indian summer monsoon and ENSO

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DOI	10.1007/s00382-018-4207-2
	Role of changed Indo-Pacific atmospheric circulation in the recent disconnect between the Indian summer monsoon and ENSO
	Feba F.; Ashok K.; Ravichandran M.
发表日期	2019
ISSN	0930-7575
起始页码	1461
结束页码	1470
卷号	52 期号:2020-03-04
英文摘要	We explore the decadal variability of teleconnection from tropical Pacific to the Indian summer monsoon rainfall (ISMR) using various observational and Reanalysis datasets for the period 1958–2008. In confirmation with the earlier findings, we find that the interannual correlations between the various SST indices of ENSO and ISMR have continued to weaken. Interestingly, we find that even the robust lead correlations of the tropical pacific warm-water-volume with ISMR have weakened since late 1970s. Our analysis suggests that there is a relative intensification of the cross-equatorial flow from the southern hemisphere into the equatorial Indian Ocean associated with ISMR due to strenghtening of Mascarene High. Further, a shift in the surface wind circulation associated with monsoon over the northern pacific since late 1970s has resulted in a strenghtened cyclonic seasonal circulation south-east of Japan. These changed circulation features are a shift from the known circulation-signatures that efficiently teleconnect El Niño forcing to South Asia. These recent changes effectively weakened the teleconnection of the El Niño to ISMR. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Decadal variability; ENSO; Indian summer monsoon; Pacific surface winds; Warm water volume; Wind circulation
语种	英语
scopus关键词	atmospheric circulation; climate forcing; El Nino-Southern Oscillation; monsoon; summer; surface wind; teleconnection; warm water; wind-driven circulation; India; Indian Ocean; Pacific Ocean; Pacific Ocean (Tropical)
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/146564
作者单位	Centre for Earth and Space Sciences, University of Hyderabad, Hyderabad, India; National Centre for Antarctic and Ocean Research, Goa, India
推荐引用方式 GB/T 7714	Feba F.,Ashok K.,Ravichandran M.. Role of changed Indo-Pacific atmospheric circulation in the recent disconnect between the Indian summer monsoon and ENSO[J],2019,52(2020-03-04).
APA	Feba F.,Ashok K.,&Ravichandran M..(2019).Role of changed Indo-Pacific atmospheric circulation in the recent disconnect between the Indian summer monsoon and ENSO.Climate Dynamics,52(2020-03-04).
MLA	Feba F.,et al."Role of changed Indo-Pacific atmospheric circulation in the recent disconnect between the Indian summer monsoon and ENSO".Climate Dynamics 52.2020-03-04(2019).