【摘要】 利用2000—2007年5～10月云南及周边地区12个探空站08:00和20:00观测资料,分6种不同地形高度类型分析了边界层内基本气象要素间关系,根据分析结果设计了云南地面资料同化方案,并选取两个暴雨个例进行模拟分析。结果表明:探空资料的贡献在引入地面资料后有所调整,在Rug-giero方案中,地面资料的引入在模拟区域初始场中东部地区有明显的升温和增湿,对强降水的模拟改善作用较小;而在云南方案中东部地区的温度和湿度明显降低,叠加的地面测站与模式地形高度差异相关且大致相同,模拟的降水强度和范围在实况降水中心附近明显增加,而在降水强度不明显的区域变化不大,从而使得模拟效果得到了较好的改善,表明云南方案对云南地区强降水的模拟是适用的。更多还原

【Abstract】 Using the observational data at 12 sounding stations in Yunnan and its surrounding regions at 08:00 and 20:00 from May to October 2000\₂007,the relationship of basic meteorological elements in boundary Layer is analyzed based on the six kinds of different terrain heights.The Yunnan surface data assimilation scheme is designed according to the analyzed result and the selected two rainstorm cases are simulated.The results show-that the effects-of sounding data is adjusted after the surface data assimilation.In Ruggiero assimilation scheme,the marked warming and humidification appear at the eastern part of the simulated region in the initial field-for surface data assimilation,a little-improvement in simulation of heavy precipitation;but in Yunnan assimilation scheme,the temperature and specific humidity significantly decrease in the eastern region,superimpose the distribution almost-the same,which correlates to the height differences between surface stations and model terrain,the intensity and coverage of the simulated precipitation obviously increase near the center of actual precipitation,and there is no change in the region with less rainfall.So the simulated effect has the great improvement,which-indicates-that Yunnan assimilation scheme is applicable to heavy precipitation simulation in-Yunnan region.更多还原