双Doppler雷达非同时性资料反演三维风场的改进方案  

An Improved Scheme to Deal with Non-Simultaneous Doppler Radar Observation during Three Dimensional Wind Field Retrieval

作　　者：刘舜[1] 邱崇践[1] 

机构地区：[1]兰州大学大气科学系,甘肃兰州730000

出　　处：《高原气象》2003年第4期329-336,共8页Plateau Meteorology

基　　金：国家重点基础研究发展项目(G1998040902);国家自然科学基金项目(40175010)资助

摘　　要：针对Doppler雷达观测资料具有非同时性的特点,对原有的从双Doppler雷达资料反演三维风场的MANDOP方法进行了改进。新方案同时反演两次体积扫描期间开始和结束两个时刻的三维风场并假设在该期间内风随时间线性变化,从而保证了在目标函数中反演量与观测量的时间一致性。用模式模拟资料和一次实测的超级风暴单体资料分别进行了反演试验,结果表明,采用该处理方案可以提高反演精度。The MANDOP three dimensional wind retrieval method is modified. A new scheme is added to deal with non\|simultaneous weather Dopplerradar observation. In the new scheme, assuming that wind fieldevolution islinear during retrieval period. Two three dimensional wind fields at the beginning and the ending of two volumes scan are retrieved. Hence the retrieved variables are consistent with the observed variables in objective function. The scheme is tested by simulated datasets and supercell storm observation. Results show that the new scheme can improve wind retrieval.

关 键 词：DOPPLER雷达 反演 三维风场 资料 线性变化 非同时性 

分 类 号：P412[天文地球—大气科学及气象学]