基于卫星主动观测的东海海域有限高度视线无云概率研究

Characteristics of cloud occurrence frequency along the line of sight at given height over the East China Sea from satellite-based active measurements

鉴于卫星主动观测具备对云空间结构进行垂直观测能力,利用2008年CloudSat/CALIPSO卫星资料,以东海为例,重点开展了不同高度不同视线方向视线无云概率的分布特征研究。结果表明:视线无云概率随观测高度、角度的不同而不同,相同高度不同视线方向无云概率分布差异显著。研究结果对加强卫星云特征产品的实际保障应用具有重要意义。

Based on the cloud vertical structure observed by the satellite-based active measurements, the CloudSat/CALIPSO observations from January 2008 to December 2010 are used to analyze the characteristics and distributions of cloud occurrence frequency along the line of sight at difference heights over the East China Sea. The results show that the cloud occurrence frequency along the line of sight is dependent on the altitude and angle from the observer. The cloud occurrence frequency is significantly difference along the different line of sight at the same height. The results are significant for the actual application of the observations from satellite.