2020 Volume 76 Issue 2 Pages I_7-I_12
In this study, we statistically analyzed the future change of Baiu heavy rainfall duration and accumulated rainfall considering its spatio-temporal characteristics by classifying them into “quite localized back-building type Baiu heavy rainfall” and “relatively localized Baiu heavy rainfall caused by large convergence of Baiu front”. We analyzed the Baiu heavy rainfall events obtained from a 5km-mesh regional climate model and past real events. As a result, we showed the parameter of present and future Baiu heavy rainfall is significantly different and that the peak of occurence frequency will shift to the longer duration in future. In addition, it is clarified that the relationship between heavy rain duration and accumulated rainfall was different by classifying the spatio-temporal characteristics. The results bring a new viewpoint of future change, and deepened the understanding of the phenomenon itself of Baiu heavy rainfall.
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