新型探测资料在滇西北高原一次暴雨过程监测中的应用

Application of New-Type Observational Data to Analysis of a Rainstorm Weather Event in Northwestern Yunnan Plateau

应用新型探测资料对2012年9月1日至3日在云南大理发生的暴雨天气过程进行了分析,结果表明:微波辐射计在降水时段的云底高度保持在1km以下,液态水含量越大降水强度越强,温度出现较大的波动,相对湿度高层小值区与较强降水有很好的对应关系;降水时段风廓线雷达的探测高度增高,水平风从地面到高空顺时针旋转(暖平流),垂直风速小于-4m/s,信噪比值大于40dB,信噪比强度与降水强度有正相关关系,分析结果有利于对暴雨天气展开更详尽的监测研究。

A rainstorm weather event occurred from 1 to 3 September 2012 in Dali over the northwestern Yunnan Plateau is analyzed based on the new-type detection data. The results indicate that during the rainfall, the cloud base height observed by a microwave radiometer always maintained under 1 km, and the larger the liquid water content was, the stronger the rainfall intensity was; air temperature appeared lager fluctuation; the small value area of relative humidity at upper levels corresponded well with heavy precipitation. During precipitation, the detection height from wind profile radar increased; the horizontal wind rotated clockwise from ground to top （warm advection）, and the vertical wind speed was less than --4 m/s; the signal-to-noise ratio was greater than 40 dB, and there was a positive relationship between signal to-noise ratio and rainfall intensity. The results are helpful to the monitoring and studies of rainfall weather in details.