AMSR-E数据参数化法反演液态云水路径研究  

Polarization-difference parameterization in estimating liquid water path based on AMSR-E data

作　　者：王颖 李国春[2] 高阳华 杜钦 赵梓淇[4] 

机构地区：[1]重庆市江津现代农业气象试验站,重庆402260 [2]沈阳农业大学,辽宁沈阳110161 [3]重庆市气象科学研究所,重庆401147 [4]中国气象局沈阳大气环境研究所,辽宁沈阳110166

出　　处：《气象与环境学报》2016年第2期59-65,共7页Journal of Meteorology and Environment

基　　金：重庆市气象局青年基金项目(QNJJ-201510)资助

摘　　要：液态云水路径是气象学和云雾物理的一个重要参数,其定量测量对气候变化及灾害性天气的监测和预报均具有十分重要的作用.本文利用AUQA卫星携带的微波成像仪AMSR-E和中分辨率成像光谱仪MODIS确定微波极化通道亮温与大气含水量ω的关系,并改进双极化参数法.结果表明:利用AMSR-E的89.0 GHz和36.5 GHz微波极化通道亮温数据可直接反演液态云水路径,并可依据MODIS反演的大气含水量ω将反演分辨率估算至1 km.反演结果与MODIS云图路径吻合,与NCEP 1°×1°的6 h液态云水路径垂直积分总含量资料进行对比,表明反演结果误差小于0.04 kg·m^(-2).Cloud liquid water（ vertically-integrated cloud liquid water） is a key parameter in meteorology and cloud physics, and its quantitative measurement is important to climate change, numerical weather prediction（ NWP）,and severe weather monitoring. Using a combination of the space-borne microwave radiometer AMSR-E and the Moderate Resolution Imaging MODIS with AUQA,relationship between microwave polarization channel bright ness temperature and atmospheric moisture ω was established,and the polarization-difference parameterization（ PDP） was improved. The results indicate that cloud liquid water path can be directly retrieved by the Advanced Microwave Scanning Radiometer for earth observing plan（ EOS）（ AMSR-E） polarization-difference signals at 36. 5 GHz and 89 GHz,and the resolution could reach 1 km according to retrieved ω of MODIS. Retrieval of cloud liquid water path from AMSR-E and the presented cloud image by MODIS conforms completely. Compared with the retrieved products from the NCEP 1° × 1° 6 h vertically-integrated cloud liquid water data,the error is less than 0. 04 kg·m^-2.

关 键 词：液态云水路径 微波遥感 AMSR-E MODIS 

分 类 号：P426[天文地球—大气科学及气象学]