2003年4月18日暴雨与汛期暴雨的对比分析

A Comparison Analysis between “0418” Heavy Rain and Heavy Rain in Flood Season

利用常规资料、数值预报产品对2003年4月18日发生的暴雨做了重点分析,并将其与汛期暴雨进行对比。结果表明二者在环流形势、动力条件和低空急流方面存在着明显差异,汛期暴雨涡度、散度、垂直运动场较强,而非汛期暴雨冷空气强度相对较强,低空急流也较强。

Based on the routine data and numerial model, “0418”heavy rain is analyzed and compared with heavy rain in flood season. The results show that the vorticity, divergence and vertical velocity are stronger in the flood season, but the cold wave and the low level jet are stronger in the non-flood season.