合浦县暴雨气候特征及成因分析

摘要

Basing the rainstorm data from 1971-2010 of Hepu weather station, the interannual variation, decadal variation and the distribution characteristics of rainstorm day were analyzed. It shows that the rainstorms days has an obvious upward trend. The rainstorm concentrated during May- September, especially in July. The special geographical location of Hepu is conducive to the formation and development of rainstorm. The most important affecting weather systems include the front, upper trough, shear line, torrent, tropical cyclones.%利用合浦县台站1971—2010年40a暴雨观测资料，分析了暴雨日数的年际变化、年代际变化和暴雨季节分布特征，分析得出，合浦县暴雨日数呈上升趋势，且上升幅度明显；暴雨主要集中分布在5-9月，以7月份出现暴雨、大暴雨及特大暴雨日数最多。合浦县特殊的地理位置和地形特点有利于暴雨天气的形成和发展，影响暴雨的最主要天气系统为锋面、高空槽、切变线、急流、热带气旋等。