Clausius–Clapeyron‐like relationship in multidecadal changes of extreme short‐term precipitation and temperature in Japan

Long‐term changes in extreme precipitation were studied using data of daily maximum 10‐min and hourly precipitation, as well as daily total precipitation for 60 years (1951–2010) in Japan. It was found that extreme 10‐min and hourly precipitations, defined from 5‐year averages of annual maximum and 95th percentile values, have a high correlation with temperature with a rate of 9.7 ± 4.1% and 8.8 ± 8.3% K −1 , respectively. These values are close to the Clausius–Clapeyron ( CC ) rate of change in saturation vapor pressure (about 6% per degree), indicating that the CC relation roughly holds for multidecadal changes in extreme short‐time precipitation in Japan.