地基遥感大气水汽总量和云液态水总量的研究

介绍了地基微波辐射计遥感反演大气柱中的水汽总量和云液态水总量的辐射传输原理和反演方法。给出了实用的有气候代表性的北京地区4个季节的反演公式，并对反演公式进行了数值检验，分析了反演精度：春、夏、秋、冬4季水汽总量反演的相对标准偏差分别为3．1％、1．6％、2．2％和2．4％。用反演公式反演在香河探测的NASA微波辐射计资料发现：微波辐射计反演的水汽总量平均比探空测量值偏大O．21cm，二者的线性相关系数为0．988．均方根误差为0．16cm：云液态水总量除降水云天外．值均在0．1mm以下。

A Study on Ground- Based Remote Sensing of Atmospheric Integrated Water Vapor and Cloud Liquid Water

The fundamental and method of the ground-based microwave radiometer remote sensing retrieval of integrated water vapor(V) and cloud liquid water(L) in the atmosphere are introduced herein.Climatologically representative retrieval equations for different seasons in Beijing are given,and the numerical simulation tests of the accuracy of retrieval results are also presented.The relative standard deviation of retrieved values of V is 3.1%,1.6%,2.2% and 2.4%,respectively,for spring,summer,autumn and winter.It is found from the retrieval results of the NASA microwave radiometer data taken at Xianghe that on average,the retrieved V is 0.21cm greater than that measured by radiosonde;the linear correlation coefficient between the two V is 0.988,and the rms error is 0.16cm;and the L value is always below 0.1mm except precipitation weather.