星载微波辐射计反演洋面非降水云区云水总量的研究

A SIMULATION STUDY FOR DERIVING LIQUID WATER PATH IN THE NON-RAINING CLOUD ATMOSPHERE OVER THE OCEANS FROM SPACE-BORNE MICROWAVE RADIOMETRIC MEASUREMENTS

云水总量(也可称为液水路径)是一个重要的气象学和云雾物理参数。星载微波辐射计是目前监测全球范围内云水总量分布和变化的最强有力的技术手段。但由于云水总量的实测资料太少,给反演研究带来很大的困难。在本工作中,根据微波辐射传输模式,模拟计算“人工”资料样本,建立了AMSR-E 18.7 GHz^36.5 GHz六个极化通道云天-晴天亮温差与云水总量的线性回归关系,初步对云水总量的反演作了定性的研究。

Cloud liquid water path （i. e. vertically-integrated cloud liquid water） is an important parameter in meteorology and cloud and mist physics. The space-borne microwave radiometer is the most powerful tool for monitoring the distribution and variation of cloud liquid water path on global scale. However, the actual measurements of cloud liquid water path are too limited to carry out the retrieval work. In this study, the manual＂ data sample is simulated based on a radiative transfer model and a linear regression relationship is obtained＇ between cloud liquid water path and the difference of brightness temperature in cloudy and clear atmospheres from 18. 7GHz to 36.5 GHz of AMSR-E. This study is a primary qualitative study to retrieval cloud liquid water path.