浅水波方程有限区域谱模式与相应的差分模式比较试验
投稿时间:1991-01-12    点此下载全文
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作者单位
韩卫清 中国卫星气象中心 
廖洞贤 国家气象中心 
中文摘要:利用浅水波方程有限区域谱模式及格距不同的两个差分模式,对两次天气过程,分别做了24小时和48小时的预报,并对预报结果进行了统计检验。结果表明:谱模式的预报效果最优,尤其是对我国东北地区闭合低压强度的预报,谱模式的优越性更明显。预报试验的成功对进一步应用和发展有限区域谱模式,提高短期预报效果,具有一定意义。
中文关键词:谱模式  差分模式  预报
 
COMPARATIVE EXPERIMENTS OF A SHALLOW WATER EQUATION LIMITED-AREA SPECTRAL MODE L WITH THE CORRESPONDING FINITE-DIFFERENCE MODELS
Abstract:Three sets of 24 and 48 hr forecasts for two synoptic cases have been made with a shallow-water equation limited-area spectral model and two different-grid-point finite-difference models respectively, together with their statistical verification.Results reveal that the forecasts made with the spectral model are superior to thos emade with the other two models, especially in the case of the genesis of the closed low in Northeast China. The success of the experiments opens good prospects for further application of the limited-area spectral model and improvement of short-range forecasting.
keywords:spectral model  finite-difference model  forecasting
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