摘要
利用NCEP 1°×1°再分析资料及地面加密站、GPS、闪电定位仪等资料,对2011年6月24日发生在无锡、宜兴两地强降水过程的影响系统、环流特征及相关物理量进行了诊断分析。结果表明,在水汽条件近乎相同的情况下,降水多寡与前期积累和降水期间释放的对流有效位能有直接关系,而降水期间强的温度梯度、近地面水平风切变以及地形因素在触发和增加降水强度方面起到了关键作用。
Based on the NCEP 1° x 1° reanalysis data, surface intensive observation, GPS and lightning location instrument data, the diagnostic analysis of the influence system, circulation characteris tics and related physical quantity of the precipitation process which occurred in Wuxi and Yixing in July 24, 2011 was carried on. The results indicate that the precipitation intensity is dependent on the early ac cumulation and the convective available potential energy under same moisture conditions. In addition, the temperature gradient, surface wind shear and topography play key roles in triggering and intensifying the strong precipitation.
出处
《气象与环境科学》
2012年第B09期38-41,共4页
Meteorological and Environmental Sciences
关键词
强降水
差异性
对流有效位能
地形影响
intensive rainfall
different characteristics
convective available potential energy
topo graphic influence
