青藏高原地面Doppler雷达与TRMM星载雷达测云比较  

Comparison of Cloud Observed by Ground Based Doppler Radarwith TRMM PR in Qinghai-Xizang Plateau, China

作　　者：冯锦明[1] 刘黎平[2] 王致君[1] 楚荣忠[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [2]中国气象科学研究院,北京100081

出　　处：《高原气象》2001年第4期345-353,共9页Plateau Meteorology

基　　金：国家自然科学基金项目 ( 4 9875 0 0 );中科院"知识创新工程 2 10 0 41项目"资助

摘　　要：利用 1998年青藏高原地面Doppler雷达资料和TRMMPR资料进行对比分析 ,分别从不同角度出发 ,分析了Doppler雷达和TRMMPR所测云区在回波结构和回波强度等方面的相同和差异之处 。By analyzing Doppler radar data and TRMM PR data of Qinghai-Xizang Plateau in 1998, we compare the difference and similarity of cloud observation by ground based Doppler radar and TRMM PR in many different aspects, such as echo structure, echo intensity and precision of rainfall measuring. Some causes are given to interpret these deviations.Generally, the echo structure observed by TRMM PR is very similar with that observed by ground based Doppler radar, but the echo intensity observed by TRMM PR is greater than that observed by ground based Doppler radar. Echo intensity observed by TRMM PR has systematic deviation of 2~3 dB with that observed by ground based Doppler radar.Because of the different observational mode and transmittal wavelength of TRMM PR and ground based Doppler radar, the scatter property for those cloud particle of the different phase and spatial direction is also different. Therefore, the deviations of cloud observation is caused.

关 键 词：DOPPLER雷达 回波结构 回波强度 青藏高原 云 三维结构 

分 类 号：P412.25[天文地球—大气科学及气象学]