微波辐射计资料在东营市降水和大雾天气研究中的应用

Application of Microwave Radiometer Data in Study on Precipitation and Heavy Fog in Dongying City

使用东营市MP-3000A微波辐射计资料,分析了2011年8月到2014年7月期间东营市发生的降水及大雾天气。结果表明,暴雨与大雨降水前1 h水汽含量V值和液态水含量L值变化具有双峰结构,并且跃增值与量级成正比,而中雨及小雨不具备双峰结构;在大雾发生前,逆温层厚度在400 m左右,并且逆温层的温差刚开始都较小,水汽密度在200~500 m厚度和大雾发生前1 h有不同程度的跃增现象,跃增层高度在逆温层顶附近,并高于初始逆温层,大雾发生过程中,逆温层不断增长。

Using MP-3000A microwave radiometer data of Dongying City, the precipitation and heavy fog during the period from August 2011 to July 2014 in Donating City were analyzed.The results showed that the characteristics at 1 hour before precipitation in torrential rain and heavy rain showed double-peak structure and step increment in proportion to the magnitude, while in moderate rain and light rain didn＇t show this structure.Before the fog, the thickness of the temperature inversion layer was about 400 meters, and the temperature difference of the temperature inversion layer was small at the beginning.The thickness of the water vapor density was 200 to 500 meters when 1 hour before the fog occurs.The height of the increment layer was near the top of the temperature inversion layer and higher than the initial temperature inversion layer,which verified that the temperature inversion layer was growing during the process of fog.