FEARURES OF OCCURRENCE OF LINEAR AND STAGNANT RAINFALL BANDS UNDER PAST AND FUTURE CLIMATE AROUND HOKKAIDO

Abstract

 Using observations and the Ensemble Climate Prediction Database (d4PDF), we analyzed the occurrence characteristics of linear and stagnant precipitation bands. In recent years, heavy rainfall disasters involving LRB have been frequent all over Japan, and the Japan Meteorological Agency defines a linear precipitation bands from the shape and stagnation time of precipitation zones of 80 mm/3h or more from the aspect of disaster prevention. In Hokkaido, however, several floods and landslides have occurred even with much lower precipitation than that. In this study, LRB are redefined for the Hokkaido region, and the frequency of occurrence, regional distribution, and model characteristics in past and present climates are shown through observations and application to the d4PDF.