J4 ›› 2011, Vol. 29 ›› Issue (1): 10-16.

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Analysis of Temperature Difference Between the Inside and Outside of a Hail Clou Based on Microwave Radiometer Data

ZHOU Wei1,WU Hongyi2,TIAN Haijun1
  

  1. 1.Beijing Weather Modification Office,Beijing 100089,China;
    2.Beijing Meteorological Observatory,Beijing 100089,China.
  • Received:2010-09-16 Revised:2011-01-05 Online:2011-03-31 Published:2011-03-31

基于微波辐射计资料浅析对流降水云内与环境温差

周嵬1吴宏议2田海军1
  

  1. 1.北京市人工影响天气办公室,北京100089;2.北京市气象台,北京100089
  • 作者简介:周嵬(1979-),男,工程师,主要从事大气物理学研究.E-mail:cq_zhouwei@163.com
  • 基金资助:

    “环北京地区空中云水资源评价研究”(2006BAC12B00-01-01-08)资助

Abstract:

The vertical temperature profile data of a lightning hail cloud moving from northwest to southeast over Beijing on September
14,2008 remote sensed by TP/WVP-3000 microwave radiometer are analyzed here.Referring to radar echoes and automatic weather
system precipitation data,we use the temperature data of Guanxiangtai station as the environment temperature profile when it does not
rain there,and use the temperature data of Chedaogou station as the hail cloud temperature profile when it rains there only.The evolu-
tion of temperature profile over Chedaogou station,the mean systematic errors and the temperature deference at 2,4,6 km height be-
tween two stations are studied.Results show that during the rianfall period(from 21:00 to 21:15)the temperature at the bottom of
the hail cloud is much more lower than that outside the hail cloud where it does not rain,but from the lower level to the higher level in
front of hail cloud,the temperature is much more higher than that outside the hial cloud,the difference is 4.2℃at 2 km,10.1℃at
4 km and 8.8℃at 6 km.

Key words: microwave radiometer, hail cloud, temperature difference, temperature vertical profile

摘要:

使用北京市气象局2台TP/WVP-3000微波辐射计探测2008年9月14日1次西北—东南移向的雷暴冰雹天气的温度廓线数据,以降水回波只覆盖西北方的车道沟站且产生降水时的温度数据作为降水云内温度垂直廓线,以东南方的观象台站的温度数据作为云外环境温度垂直廓线,比较分析了降水云内和环境温度在不同垂直高度层上的差异和降水云移经单站上空的温度演变,并用CFL-03型边界层风廓线仪分析了降水过程中下沉气流的特征。结果显示:降水发生时段(21:00~21:15),降水云内与环境平均温差呈现底层温度远低于无降水的云外环境温度,而降水云前部从低层到高层云内温度都远高于环境温度,其中2 km高4.2℃,4 km高10.1℃,6 km高8.8℃。

关键词: 微波辐射计, 降水云, 温差, 温度垂直廓线

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