Physics
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3512705m&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 12, CiteID L12705
Physics
8
Atmospheric Processes: Global Climate Models (1626, 4928), Atmospheric Processes: Land/Atmosphere Interactions (1218, 1631, 1843), Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513)
Scientific paper
A case is made to show that all continental summer monsoon regions of the globe are manifestations of strong, coupled ocean-land-atmosphere interactions. It is shown from observations that the auto-decorrelation time of the daily rainfall in the summer monsoon regions is usually in excess of 3 days. This characteristic feature of the monsoon rainfall is well simulated in a global coupled ocean-land-atmosphere model. The atmospheric general circulation model component integrations of the same coupled model forced with observed SST show a distinctly shorter auto-decorrelation time of the daily monsoon precipitation. An obvious conclusion is that air-sea coupling is essential for this feature of the monsoon rainfall to be simulated. But through additional diagnostic calculations it is also shown that the robust land-atmosphere interactions over these regions also contribute to the lengthening of the auto-decorrelation time of the daily continental summer monsoon rainfall.
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