利用ECMWF和GPS研究分析一次典型锋面雨

摘要

ECMWF can provide a wide range of grid on the vertical dimension of water vapor density,temperature,pressure and other profile data,and can also get a wide range of meteorological elements inversion.GPS could get the PWV of one single point,but the accuracy and time resolution can be very high.This article integrates the advantages of two methods of inversion to study a typical frontal rainfall in Taiwan,by detailed analysis of the changed characteristics of the meteorological elements before and after the rain.Results show that the ECMWF inversion can be used to judge whether there are the kinetics conditions for rainfall in a certain period.According to the results of GPS inversion,the forecast could be guided by higher time resolution.%ECMWF可提供大范围格网点上垂向维的水汽密度、温度、偏压等剖线数据,能反演获得大范围的气象要素及水汽值.GPS可反演获得单个点的水汽值,精度及时间分辨率都极高.本文综合两种反演方法的优点,研究台湾地区一次典型的锋面降雨,对降雨前后各气象要素的变化特征进行详细分析.结果表明,利用ECMWF的反演结果可判断在一定时间段内是否有降水的动力学条件;根据GPS反演水汽结果可以在更高的时间分辨率上对降水时间有指导作用.