数字滤波初值化方案的数值实验  

NUMERICAL EXPERIMENT OF DIGITAL FILTERING INITIALIZATION SCHEME

作　　者：周毅[1] 刘宇迪[1] 王海舰 

机构地区：[1]南京空军气象学院,南京211101

出　　处：《气象科学》1999年第4期388-395,共8页Journal of the Meteorological Sciences

摘　　要：本文以一个有限区域16层斜压原始方程模式为基础，对数字滤波初值化方案进行了数值试验，并与平衡初值及实测风初值等方案的积分结果进行了比较、结果表明：数字滤波初值化能有效地滤掉初始场中的高频重力波和小尺度扰动，使客观分析质量得到明显改进；该方法易于引入非绝热过程，能有效抑制积分初期的Spinup现象；形势预报和降水预报均较其它方案有所改进。Numerical experiments of digital filtering initialization schemes are tested in a limited area baroclinic primitive equation model. The results show that comparing to real wind scheme and balanced wind scheme,the initial fields derived from diabatic digital filtering initialization scheme are more reasonable ithe spurious high frequency oscillations due to the imbalance between the init1al fields of mass and wind are removed efficiently. The precipitation forecasts is improved.

关 键 词：有限区域 数字滤波 初值化 数值实验 风场 

分 类 号：P435[天文地球—大气科学及气象学] P425