DOI: 10.1007/s00382-015-2894-5
Scopus记录号: 2-s2.0-84946141900
论文题名: Potential role of the February–March Southern Annular Mode on the Indian summer monsoon rainfall: a new perspective
作者: Prabhu A. ; Kripalani R.H. ; Preethi B. ; Pandithurai G.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-03-04 起始页码: 1161
结束页码: 1179
语种: 英语
英文关键词: ENSO Modoki
; Indian summer monsoon rainfall
; Southern Annular Mode
英文摘要: Relationship between the Southern Annular Mode (SAM) and the India summer monsoon rainfall (ISMR) has been examined based on the data period 1949–2013. While the entire data period indicates a significant increasing trend in SAM, recent decades 1983–2013 indicate no trend. The relationship between the two strengthened considerably since 1983. Results reveal that the February–March SAM is significantly related with the subsequent ISMR. A positive (negative) SAM during February–March is favorable (unfavorable) for the ensuing summer monsoon rainfall over the Indian sub-continent. The delayed response is relayed through the central Pacific Ocean. We propose a hypothesis that states: when a negative (positive) phase of February–March SAM occurs, it gives rise to an anomalous meridional circulation in a longitudinally locked air–sea coupled system over the central Pacific that persists up to the subsequent boreal summer and propagates from the sub-polar latitudes to the equatorial latitudes inducing a warming (cooling) effect over the central equatorial Pacific region. In turn, this effect concomitantly weakens (strengthens) the monsoon rainfall over the Indian sub-continent. Thus, the February–March SAM could possibly serve as a new precursor to foreshadow the subsequent behavior of the Indian summer monsoon. © 2015, Springer-Verlag Berlin Heidelberg.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53610
Appears in Collections: 过去全球变化的重建
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作者单位: Indian Institute of Tropical Meteorology, Dr. Homi Bhaba Road, Pune, India; International CLIVAR Monsoon Project Office, Pune, India
Recommended Citation:
Prabhu A.,Kripalani R.H.,Preethi B.,et al. Potential role of the February–March Southern Annular Mode on the Indian summer monsoon rainfall: a new perspective[J]. Climate Dynamics,2016-01-01,47(2017-03-04)