黄山山脉地形对暴雨降水增幅条件研究  

Study of Huangshan Mountain Terrain on Precipitation Enhancement Condition

作　　者：刘裕禄 黄勇 

机构地区：[1]黄山市气象台,安徽黄山245021 [2]安徽气象研究所,安徽合肥230031

出　　处：《高原气象》2013年第2期608-615,共8页Plateau Meteorology

基　　金：国家自然科学基金项目(40905019);公益性行业(气象)科研专项(GYHY200906003);中国气象局气象关键技术集成与应用项目(CMAGJ2011M25)共同资助

摘　　要：利用103个自动气象站、6个人工观测站资料和5km×5km局地分析预报系统LAPS资料,分析了黄山山脉的日雨量和短时雨量极值分布,发现日雨量极值分布与地形关系密切。运用凝结函数、水汽收支和增幅系数方法诊断并计算了暴雨的地形增量,结果表明,降水系统经过黄山山脉时,扰动加强是降雨增幅的主要原因。扰动风场辐合与地形高度有利配合形成的地形抬升速度是降雨增幅的主要动力因子,地形抬升导致的水汽垂直通量和水平通量辐合是降雨增幅的直接原因。Using the mesoscale rain gauge and LAPS system, the distributions of daily rainfall extremes and rainfall of extreme value distribution in Huangshan mountains are analyzed. It is found that there is close relationship with the rainfall distribution of extreme terrain. The condensation function, wa- ter vapor budget and increase coefficient method are used to diagnoses and calculates the terrain incremental of rainstorm. The result shows that, when the precipitation system go through mountains, the favourable cooperation of disturbance wind field convergence and the height of the terrain that forms the orographic lifting speed to be the main power factor increment. The disturbance is the main reason of precipitation enhancement in Huangshan mountains.

关 键 词：降水增幅 地形抬升 黄山山脉 

分 类 号：P463.21[天文地球—大气科学及气象学]