四川盆地西北部一次暴雨过程数值试验  

A Numerical Experiment of Torrential Rain in the Northwest of Sichuan Basin

作　　者：何光碧[1] 郁淑华 

机构地区：[1]四川省气象台,成都610072 [2]四川省科研所

出　　处：《气象》2000年第4期7-11,共5页Meteorological Monthly

摘　　要：利用成都区域气象中心 η坐标模式对 1998年 8月 19日发生在四川盆地西北部的一次暴雨过程进行了数值模拟试验。结果表明 :η模式对此过程系统移动、降水强度和落区有较好的预报。在此暴雨过程中 ,高原低涡对暴雨强度、范围影响很大 ;高原地形对暴雨落区关系密切 ;河套小高压的存在有利降水加强。By using the ETA model,a numerical simulation and experiment was conducted for a torrential rain in the northenwest of Sichuan basin on 19 August,1998.The results show that the ETA model is of better abilities on the presage of the system movement,the intensity and area of precipitation.During the torrential rain,low vortex over the plateau has the greater effect on the intensity and area of precipitation.Topograply has a close relation with the area of the torrential rain.The existence of small high pressure between Gashu and Shaanxi avails increment of the intensity of precipitation.

关 键 词：暴雨 数值试验 Η坐标模式 四川盆地 

分 类 号：P426.62[天文地球—大气科学及气象学] P435