Intensified Asian summer monsoon and its variability in a coupled model forced by increasing greenhouse gas concentrations

The Asian summer monsoon response to global warming is investigated by a tr ansient greenhouse warming integration with the ECHAM4/OPYC3 CGCM. It is de monstrated that increases of greenhouse gas concentrations intensify the As ian summer monsoon and its variability. The intensified monsoon results mai nly from an enhanced land-sea contrast and a northward shift of the converg ence zone. A gradual increase of the monsoon variability is simulated from year 2030 onwards. It seems to be connected with the corresponding increase of the sea surface temperature variability over the tropical Pacific.