一次受台风影响的大气波导过程分析和数值模拟-海洋预报

一次受台风影响的大气波导过程分析和数值模拟

单位：1. 解放军理工大学气象学院, 南京, 211101;
2. 总参气象水文中心, 北京, 100081

分类号：P731

出版年·卷·期（页码）：2007·2007·第二期（17-25）

摘要：

利用NCEP再分析资料及实况探空资料,对2002年8月31日台风“鹿莎”靠近和进入韩国期间,在我国东部地区大气波导的发生情况,以及相对应物理量场进行分析发现:湿度递减以及辐散下沉运动与大气波导的发生有很好的对应关系。运用中尺度预报模式ARPS对这次大气波导过程进行了两种方案的数值模拟试验,结果表明:对大气波导进行数值模拟时,初始场非常重要。在初始时刻同化了探空资料后的初始场更接近真实大气状况,同化探空资料初始场的模拟结果比没有同化探空资料初始场的模拟结果更接近于实际探空资料。

An atmospheric duct process affected by typhoon Rusa is analyzed using the NCEP data and the sounding data in Chinese east areas.The humidity fields and the divergence fields’changes show that:there are good relations between the atmospheric duct and the decrease of the humidity with the height and divergence.ARPS are used to simulate this atmospheric duct process.In the numerical simulation of the atmospheric duct,the initial fields are very important.At the beginning time,the initial fields which assimilated the sounding data are more close to the atmospheric environment than the ones which only used the NCEP data.The results show that the simulation results whose initial fields assimilating the soundings data are more close to the environment than the ones which not.

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