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Increasing trend of `Break-Monsoon` conditions over India — Role of ocean–atmosphere processes in the Indian Ocean

DRS at CSIR-National Institute of Oceanography

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Title Increasing trend of `Break-Monsoon` conditions over India — Role of ocean–atmosphere processes in the Indian Ocean
 
Creator RameshKumar, M.R.
Krishnan, R.
Sankar, S.
Unnikrishnan, A.S.
Pai, D.S.
 
Subject Equatorial Indian Ocean
sea surface temperature
warming trend
Indian monsoon
 
Description Analysis of daily rainfall data over India during the period 1951–2007 reveal an increased propensity in the occurrence of `monsoon-breaks` over the subcontinent. The increasing trend is seen both in the duration and frequency of monsoon-breaks over the subcontinent, the causes for which are investigated using in situ, satellite, and reanalysis data products. While noting that the increasing trend of break-monsoon conditions is consistently related to changes in large-scale monsoon circulation and vertically integrated moisture transport; the findings also point to the role of sea surface temperature (SST) warming trend (0.015 degrees C year sup(-1)) in the tropical eastern Indian Ocean (IO) in inducing anomalous changes favorable for the increased propensity of monsoon-breaks. The results indicate that the SST warming in the tropical eastern IO has altered the ocean–atmosphere processes in a manner as to intensify the near-equatorial trough over the IO, but has led to a weakening of the southwest summer monsoon flow in recent decades into the Indian landmass
 
Date 2009-03-30T11:06:59Z
2009-03-30T11:06:59Z
2009
 
Type Journal Article
 
Identifier IEEE Geoscience and Remote Sensing Letters, vol.6(2); 332-336.
http://drs.nio.org/drs/handle/2264/2605
 
Language en
 
Rights An edited version of this paper was published by IEEE. Copyright [2008] IEEE
 
Publisher IEEE