长沙冬季降水过程的微波辐射计反演参量特征分析  

Characteristic analysis of microwave radiometer inversion parameters of winter precipitation process in Changsha

作　　者：黄煌 李琼 唐林 黄宇霆 徐冬英 Huang Huang;Li Qiong;Tang Lin;Huang Yuting;Xu Dong ying(Changsha Meteorological Bureau,Changsha 410205,China;Hunan Weather Modification Leading Group 0ffice,Changsha 410118,China)

机构地区：[1]长沙市气象局,长沙410205 [2]湖南省人工影响天气领导小组办公室,长沙410118

出　　处：《气象研究与应用》2022年第1期14-19,共6页Journal of Meteorological Research and Application

基　　金：湖南省业务能力建设项目(NLJS14)。

摘　　要：利用微波辐射计、探空气球、天气雷达和地面雨量等资料,对2020年1-3月长沙国家站5次降水过程的微波辐射计和探空温度廓线、水汽密度进行检验的基础上,分析了5次降水过程中微波辐射计反演的水汽含量、液态水含量与雷达资料、降水量的变化特征。结果表明,微波辐射计反演的大气温度、水汽密度廓线精度较高,其反演的大气水汽资料可以作为降水临近预报的参考;水汽含量与液态水含量在降水开始前均有明显上升,在降水结束前回落的趋势,两者与降水量呈正相关,水汽含量接近3.5cm且液态水含量超过0.15mm可作为判断长沙地区冬春季降水开始的参考阈值;同一时段雷达回波与水汽含量也存在正相关关系,前者峰值出现时间略早于后者。Using the data of microwave radiometer, balloon sounding, weather radar and ground rainfall,the microwave radiometer, sounding temperature profile and water vapor density of five precipitation processes at Changsha national station from January to March 2020 were tested. The variation characteristics of water vapor content and liquid water content reflected by microwave radiometer, radar data and precipitation during the five precipitation processes were analyzed. The results show that the atmospheric temperature and water vapor concentration profiles retrieved by microwave radiometer have high accuracy, and the retrieved atmospheric water vapor data can be used as a reference for precipitation prediction. Water vapor content and liquid water content increase significantly before the beginning of precipitation, and decrease before the end of precipitation. They are positively correlated with precipitation. The reference threshold to judge the beginning of winter and spring precipitation in Changsha is that the water vapor content is close to 3.5cm and the liquid water content is more than 0.15mm. There is also a positive correlation between radar echo and water vapor content in the same period,and the peak time of the former is slightly earlier than that of the latter.

关 键 词：微波辐射计 水汽含量 液态水含量 降水量 

分 类 号：P407[天文地球—大气科学及气象学]