Dr.Babu, C A; Joseph, P V(Wiley InterScience (www.interscience.wiley.com)., August , 2001)
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Abstract:
We have studied sea surface temperature (SST) anomalies over the Indian and Pacific Oceans (domain 25 °S to 25°N
and 40 °E to 160 °W) during the three seasons following the Indian summer monsoon for wet monsoons and also for
dry monsoons accompanied or not by El Ni˜no. A dry monsoon is followed by positive SST anomalies in the longitude
belt 40 to 120 °E, negative anomalies in 120 to 160 °E and again positive anomalies east of 160 °E. In dry monsoons
accompanied by El Ni˜no the anomalies have the same sign, but are much stronger. Wet monsoons have weak anomalies
of opposite sign in all three of the longitude belts. Thus El Ni˜no and a dry monsoon have the same types of association
with the Indian and Pacific Ocean SSTs.
In the sector 40 to 120 °E SST anomalies first appear over the western part of the Indian Ocean (June to September)
followed by the same sign of anomalies over its eastern part and China Sea (October to March). By March after a dry
monsoon or El Ni˜no the Indian Ocean between 10 °N and 10 °S has a spatially large warm SST anomaly. Anomalies in
deep convection tend to follow the SST anomalies, with warm SST anomalies producing positive convection anomalies
around the seasonal location of the intertropical convergence zone