Long-term changes of precipitation intensity in monsoon Asia

对20世纪初以来包括日本在内的亚洲季风国家的纸质或图像格式的日降水资料和台风路径进行了数字化处理，并分析了日降水强度的长期变化。自1930年以来，日本各地的降水强度普遍增强，特别是在日本东北部地区具有统计学意义。菲律宾自1950年以来的降水强度在夏季有所增加，而西海岸地区在冬季有干燥的趋势。与1940年之前相比，这些趋势有所不同。降水强度同时受到ENSO事件和全球变暖的影响。在越南中部，1950年前和1950年后降水强度趋势的差异也得到了承认。

Paper or image format daily precipitation data and typhoon tracks in monsoon Asian countries including Japan back into the beginning of the 20th century have been digitized, and long-term changes of precipitation intensity on a daily basis have been analyzed. The precipitation intensity since 1930 has strengthened widely over Japan, in particular, with statistical significance in Northeast Japan. Precipitation intensity since 1950 in the Philippines has increased in summer, whereas drying trend is detected in the west coast region in winter. These trends are different when compared with those prior to 1940. Also precipitation intensity has been affected by both ENSO event and global warming. Difference of precipitation intensity trend between pre- and post-1950 has also recognized in Central Vietnam.