AMSU-A资料在台风模拟中的循环同化研究  

Cycle Assimilation Research of AMSU-A Data in Typhoon Numerical Simulation

作　　者：张钊扬 钟剑[1] 周炯[1] 马卫民[1] 张伟[1] Zhang Zhaoyang;Zhong Jian;Zhou Jiong;Ma Weimin;Zhang Wei(China Satellite Maritime Tracking and Controlling Department,Jiangyin 214431,China)

机构地区：[1]中国卫星海上测控部,江苏江阴214431

出　　处：《气象与环境科学》2018年第4期9-16,共8页Meteorological and Environmental Sciences

基　　金：国家自然科学基金资助项目(41275113);国家973研究项目(613202)资助

摘　　要：以WRF(V3. 7)中尺度模式及其三维变分同化系统(WRF-3Dvar)为平台,GFS(0. 5°×0. 5°)提供模式背景场,对AMSU-A微波辐射资料进行循环同化试验,研究台风数值模拟中AMSU-A资料的可用性及循环同化方法的可行性。以2014年第19号台风"黄蜂"为例,开展了控制试验和多组同化试验。同化试验主要包括循环同化常规观测资料和不同卫星测得的AMSU-A微波辐射资料。在对各试验初始场进行对比的基础上,比较了不同同化试验方案的模拟效果,结果表明:1) AMSU-A资料同化能有效地调整初始场,模拟的台风路径和强度都有一定的改善; 2)不同卫星探测的AMSU-A资料同化效果存在较大的差异,其中NOAA-15资料同化模拟台风"黄蜂"的路径和强度与实况最为接近; 3)循环同化是增加数值模式中资料使用量、改善台风模拟效果的有效方法。Using mesoscale model WRF（V3.7）and corresponding WRF-3Dvar as platform, GFS （0.5°×0.5°） providing background field, cycle assimilation experiments are conducted on AMSU-A microwave data, to discuss the availability of AMSU-A data and the feasibility of cycle assimilation method in numerical simulation of typhoon. Typhoon No.19“Vongfong” which happened in 2014 is simulated with a control experiment and several assimilation experiments. Assimilation experiments include cycle assimilation observation data and different satellite microwave radiation data （AMSU-A）. On the basis of comparing the initial field, the simulation results of different assimilation tests are compared. The main conclusions are as follows. 1）AMSU-A data assimilation could effectively improve the initial field, and improve the track and intensity of typhoon simulation to some extent. 2）The assimilation effect of AMSU-A data detected by different satellites are significantly different, the result of experiment with assimilation data detected by NOAA-15 is closest to reality. 3）The cycle assimilation is the effective method to increase data usage in numerical simulation and improve the typhoon simulation.

关 键 词：WRF-3Dvar AMSU-A微波资料 循环同化 路径 

分 类 号：P444[天文地球—大气科学及气象学]