【作者】 张文刚； 徐桂荣； 廖可文； 卢洋； 祝伟； 冯光柳；

【Author】 ZHANG Wengang1,XU Guirong1,LIAO Kewen2,LU Yang2,ZHU Wei2,FENG Guangliu1(1.Wuhan institute of Heavy Rain,CMA,Wuhan,430074;2.Wuhan Meteorological Bureau of Hubei Province,Wuhan,430040)

【机构】 中国气象局武汉暴雨研究所 暴雨监测预警湖北省重点实验室； 武汉市气象局；

【摘要】 利用武汉站高时间(3h)、高空间垂直(30m)分辨率的探空资料和MP-3000A型地基微波辐射计资料,分析了降水对地基微波辐射计反演误差的影响。将微波辐射计和探空的要素廓线进行对比发现,降水对两种设备的温度廓线和水汽密度廓线的相关性无明显影响,但对相对湿度廓线的相关性有较为明显的影响,其相关性在有降水时好于无降水;整体上,微波辐射计的廓线误差在降水时大于无降水,其温度、相对湿度和水汽密度廓线的平均偏差均值分别在1.0-2.5℃,6-15%和0.08-1.75 g/m3之间,对应的均方差均值分别在1.3-1.6℃,14-17%和1.28-1.85 g/m3之间。将不同高度上微波辐射计和探空的资料进行点对点对比发现,降水会严重破坏两种资料的正相关性,导致大部分高度上的廓线呈现负相关,同时也会明显增加温度和水汽密度的平均偏差和均方差。更多还原

【Abstract】 Impact of precipitation on the retrieval deviation of ground-based microwave radiometer is analyzed using high temporal resolution(3h) and high spatial vertical resolution(30m) radiosonde data and MP-3000A microwave radiometer data of Wuhan station.The result of profiles compared shows that the profiles of temperature and vapor density have a good positive correlation whatever precipitation.But the correlation of relative humidity between radiosonde data and microwave radiometer data is affected by precipitation obviously,which is better in precipitating condition.Overall,the system deviations between the profiles of radiosonde and microwave radiometer are bigger in precipitating condition.The mean average deviations of temperature,relative humidity and water vapor density profile are 1.0-2.5℃,6-15%,0.08-1.75g/m3,and the mean standard deviations of them are 1.3-1.6℃,14-17%,1.28-1.85 g/m3 respectively.The result of point compared shows that precipitation will seriously affect the retrieval accuracy of the microwave radiometer at different heights,resulting in the profiles at most height show negative correlation.At the same time,precipitation will increase the average deviation and standard deviation of most height.更多还原