中尺度数值模式中初始场和地形的不同处理对降水预报的影响及相对比较
ROLE OF INITIAL METEOROLOGICAL FIELDS AND TERRAIN HEIGHT AND THEIR COMPARISON IN MESOSCALE NUMERICAL RAINFALL FORECAST
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摘要: 与天气尺度系统相比,中尺度天气系统的风场较重要,散度场和降水量有很好的相关性。那么在中尺度模式的初始资料处理中是否能延用天气尺度模式的处理方法,如风场的无辐散处理等。另一方面,中尺度系统中强迫过程如地形的作用也很重要。这两方面分别有过不少研究[1,2],但对某一地区,特别是地形复杂的地方,弄清中尺度数值模拟是对初始场还是对地形处理敏感,将有助于中尺度模式的研究改进和地形作用的探讨。Abstract: By using the PSU/NCAR mesoscale numerical model MM4 which is currently replanted to the DPS-7 computer,7 experiments are conducted to test the effects of different methods used in objective analysis/initialization and terrain consideration.Also,the comparison is made between the effects of initial meteorological fields and terrain height.
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Browning,K.A.,C.W.Pardoe and F.F.Hill,the natare of orographic rain at wintertime cold fronts,Qwort.J.Rey.万eteor.Soe.,101,333-352,1975. Tarbell,T.C.,T.T.Warner and R.A.Anther,the initialization of the divergent component of the horizontal wind in meso-scale numerical weather prediction model and its effects on initial precipitation rates,Mon.Wea.Rev.,10t3,T7-95,1978.
Anther,R.A.,Y.K.Kuo and E.Y.Haie,Description of the Penn.State/NCAR meaoscale model version 4 (MM4),NCAR Technical Note,NCAR/TN-282-STR,66 pp.
Benjamin,S.G.,and N.L.Seaman,A simple scheme for objective analysis in curved flow,Mon.Wea.Rev.,115,1184-1198,1985.
Kuo,Y.H.,and L.S.Chen,Numerical simulation of the Sichan flood catastrophe: 11-15 July,1981,Res.Rept.,MRS/NCAR,1986.
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