用雷达观测资料改进MM5初始场的初步试验研究  

A Preliminary Research on Improving MM5 Initial Fields Using Radar Data

作　　者：托亚[1] 梁海河[2] 马淑芬[2] 朱福康[2] 

机构地区：[1]国家气象中心 [2]中国气象科学研究院,北京100081

出　　处：《南京气象学院学报》2003年第5期661-667,共7页Journal of Nanjing Institute of Meteorology

基　　金：国家攀登项目(9503)

摘　　要：采用同时调整热力学和动力学变量,并考虑湿度与温度的变化相协调的初始化方法,引进雷达资料改善MM5模式的初始场。试验结果表明:经过优化处理的初始场,显著提高了模式对降水特别是甚短时(0～6h)降水的落区和量的预报准确率。其中调整热力学变量对改进降水落区预报比动力学变量的调整更为重要。The initial fields of MM5 are improved in this paper by adopting an initialization scheme of simultaneously adjusting thermodynamic and dynamic variables and coordinating humidity and temperature changes,and by assimilating RZ data into the initial field.Experimental results show that the improved initialization of MM5 can raise the forecast accuracy of precipitation location and rainfall,expecially of 0～6h,and the thermodynamic variable adjustment is more important than the dynamic variable adjustment in improving the forecast of precipitation location.

关 键 词：初始场 中尺度 热力学变量 动力学变量 降水强度 雷达观测资料 预报 

分 类 号：P412.25[天文地球—大气科学及气象学]