Abstract
We investigated several effects of global warming to hydrological and meteorological environment. JMA/MRI have carried out simulations of global warming due to doubled CO2 by using their CGCM. They downscaled those results using a 20km scale regional meteorological model. We examined the effects of global warming on hydro-meteorological environment, viz; annual average temperature, annual maximum daily precipitation, annual precipitation and maximum dry duration, using Welch's test. As a result, mean of annual precipitation during 2080 and 2100 indicated an increasing trend that is significant at the 95% confidence level in some part of Japan, while no trend was detected in its variation. Moreover, we examined daily sea surface pressure and wind velocity at surface and 500 hPa in order to derive trend of tropical storm. The data show that percentage of intense tropical storms in total tropical storms increases when the global warming proceeds, as recently suggested by Webster et al. (2005).
