Some Statistical Characteristics of Meiyu/Baiu Frontal Depressions

Abstract

This study has investigated climatological features of Meiyu/Baiu frontal depressions (MBFDs) by identifying and tracing MBFDs from the past 12-year surface weather charts. With apparent interannual variability, an average of 22.5 MBFDs per year are found. There is a tendency for more MBFDs to form around Yangtze and Huaihe River Basins and to the south or southeast of the Japan Islands. Meanwhile, more MBFDs form in nocturnal and morning hours per day. More than half of MBFDs that pass over Japan originate from China. MBFDs commonly propagate from west to east and many MBFDs passing over Japan tend to be long lived. Finally, the analyzed statistical characteristics of MBFDs are discussed based on previous studies.

Study on the Dynamic Characteristics of an Eastward-offshore Mesoscale Vortex along the Meiyu-Baiu Front

“…It should be noted that the severe weather events (such as strong wind and heavy rainfall) induced by these vortices in the East China Sea and Yellow Sea have become a significant problem for the shipping, fishing, and energy exploration industries of Northeast Asian countries, especially China. Although there are a certain number of studies focused on eastward-moving vortices (e.g., Yamada et al, 2003;Sun et al, 2010), the details of the move-off-shore vortices are still unclear due to the lack of observations at sea and the short lifespans of the vortices in general cases (Geng, 2008). Therefore, the purpose of this study is to investigate the evolution of the move-off-shore MBFMV and compare the maintenance mechanisms of the vortex under different environmental conditions.…”