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Role of the Indian Ocean on the southern oscillation, atmospheric circulation indices and monsoon rainfall over India

DRS at CSIR-National Institute of Oceanography

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Title Role of the Indian Ocean on the southern oscillation, atmospheric circulation indices and monsoon rainfall over India
 
Creator Sadhuram, Y.
Wells, N.C.
 
Subject southern oscillation
atmospheric circulation
surface temperature
monsoon
 
Description The relationship between the sea surface temperature (SST) in a small region (0-5 N; 80-85 E) in the Eastern Equatorial Indian Ocean and Indian monsoon rainfall and monsoon Indices (M1, U200) has been examined. The role of SSTA in the Southern Oscillation and ENSO is also examined. Indian monsoon rainfall is strongly and positively correlated with the SST of November month (0.77; statistically significant at 99% level) of the preceding calendar year. Monsoon indices (M1, U200) are strongly correlated (0.70 and -0.76) with the February SST of the previous year. Summer OLR anomaly field over south Indian Ocean is negatively and strongly (-0.68) correlated with January SST of the previous calendar year. OLR anomalies over south Asian and North African sectors are strongly correlated with the November SST of the previous year. The influence of SST anomalies in the study area on SOI is seen at a lag of 25 months. A sharp fall in SST from September to December in the Eastern Equatorial Indian Ocean is noticed several months before the mature phase of ENSO. The study indicates that the remote forcing from the SST in the eastern equatorial Indian Ocean is playing an important role in the ocean-atmosphere coupling over Pacific and north Australia Indonesia regions, through the eastward propagating low frequency covenctive systems and the Walker circulation in the zonal wind field
 
Date 2009-01-10T11:35:49Z
2009-01-10T11:35:49Z
1999
 
Type Journal Article
 
Identifier Global Atmosphere-Ocean System, Vol.7; 47-72p.
http://drs.nio.org/drs/handle/2264/1827
 
Language en
 
Rights Copyright [1999]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Taylor and Francis