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Keywords:

  • cyclone cooling;
  • upper ocean processes;
  • Bay of Bengal

Abstract

High-resolution data from the TRMM satellite shows that sea surface temperature (SST) cools by 3 °C under the tracks of pre-monsoon tropical cyclones in the north Indian Ocean. However, even the strongest post-monsoon cyclones do not cool the open north Bay of Bengal. In this region, a shallow layer of freshwater from river runoff and monsoon rain caps a deep warm layer. Therefore, storm-induced mixing is not deep, and it entrains warm subsurface water. It is possible that the hydrography of the post-monsoon north Bay favours intense cyclones. Copyright © 2007 Royal Meteorological Society