Abstract
An atmospheric general circulation model (AGCM) was used for the study of global hydrological cycle. AGCM used was developed by a cooperative research project between Center for Climate System Research (CCSR), University of Tokyo and National Institute for Environmental Studies. The results were examined referring to the observational data. Especially in the case of river basin scale, estimates from the combined atmospheric-river basin water balance method using ECMWF objective analysis data (1989-92) and GRDC were used for the comparison of water balance components. The seasonal change of total water storage in each basin shows a good correspondence between the AGCM simulation and the water balance estimation.
