RELATIONS OF HOURLY PRECIPITATION EXTREMES AND TEMPERATURE OVER JAPAN BASED ON GROUND OBSERVATIONAL RECORDS

Abstract

Changes of the intensity and the frequency of extreme precipitation under climate change are great concerns to scientists and policy makers. We analyzed the 99th percentiles of 1-hour precipitation for each temperature bin based on the ground observational data. The result showed that, first: the 99th percentiles of 1-hour precipitation tend to increase exponentially with the rising temperature, second: the rate of the precipitation increase was almost same as the Clausius-Clapeyron like relation for most part of Japan, except that the rate was larger for lower latitude region, third : the 99th precipitation intensities tend to have a peak at higher temperature.