卫星遥感云分类和TBB产品在天津地区云状识别的应用分析

Analysis of Satellite Products in Recognition of the Cloud Classification and TBB in Tianjin Area

利用2012年4月1日至2013年7月31日地面观测资料和卫星遥感云分类、相当黑体亮温TBB产品,针对不同天气类型进行背景统计和个例分析,讨论云分类、TBB产品在云状自动识别中的应用。结果表明：地面云观测取消后,云观测业务可以依据卫星遥感产品展开,即以云分类产品为基础,结合TBB资料和天气现象进行订正。当无降水时,云状以云分类产品为主,如云分类产品为积雨云,可将云状订正为非降水云;当TBB〈240 K时,同时变率由负值向正值转变至接近0时,有雷暴活动发生,无论是何种云分类产品,云状可直接定为积雨云;TBB在240~260 K,为稳定性降水时,考虑为非对流性云（层积云或高积云、高层云或雨层云）。

Using the data of surface observation,cloud classification and blackbody temperature from 1April 2012 to 31 July 2013 and according to different weather types,this paper states the background,analyzes the cases and discusses the relationship among cloud classification of satellite data,TBB products,weather phenomena and cloudy shapes.The results show that after cancelling surface cloudy observation,we can carry out the cloud observing operation based on cloud classification and correct the errors by combining TBB and weather phenomena.When TBB240 K and variability is close to zero in the course of changing from negative to positive value,thunderstorms are always prone to occur and the cloudy shape is cumulonimbus cloud.When TBB is between 〈240 K and 260 K,there will be stable precipitation and cloudy shape is stratocumulus or altocumulus.