SOUTH ASIAN SUMMER MONSOON VARIABILITY IN A MODEL WITH DOUBLED ATMOSPHERIC CARBON-DIOXIDE CONCENTRATION

Doubled atmospheric carbon dioxide concentration in a global coupled o cean-atmosphere climate model produced increased surface temperatures and evaporation and greater mean precipitation in the south Asian summ er monsoon region. As a partial consequence, interannual variability o f area-averaged monsoon rainfall was enhanced. Consistent with the cli mate sensitivity results from the model, observations showed a trend o f increased interannual variability of Indian monsoon precipitation as sociated with warmer land and ocean temperatures in the monsoon region .