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Article: Indian Ocean Variability and Its Association with ENSO in a Global Coupled Model
- Article from:
- Journal of Climate
- Article date:
- September 1, 2005
- Author:
CopyrightCopyright American Meteorological Society Sep 1, 2005. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
The evolution of the Indian Ocean during El Niño-Southern Oscillation is investigated in a 100-yr integration of an Australian Bureau of Meteorology coupled seasonal forecast model. During El Niño, easterly anomalies are induced across the eastern equatorial Indian Ocean. These act to suppress the equatorial thermocline to the west and elevate it to the east and initially cool (warm) the sea surface temperature (SST) in the east (west). Subsequently, the entire Indian Ocean basin warms, mainly in response to the reduced latent heat flux and enhanced shortwave radiation that is associated with suppressed rainfall. This evolution can be partially explained by the excitation of an ...