不同天气系统影响下广东省酸雨特征对比分析——气象场数值模拟  

Comparative analysis of the features of acid rain under the influence of different weather systems in Guangdong Province-Numerical simulation of meteorological fields

作　　者：邹德龙[1] 罗栩羽[1] 范绍佳[1] 钟流举[2] 樊琦[1] 

机构地区：[1]中山大学大气科学系,广东广州510275 [2]广东省环境监测中心站,广东广州510045

出　　处：《中国环境科学》2012年第8期1439-1446,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(41175091;40875007);中山大学青年教师培育项目;国家"973"项目(2005CB422203)

摘　　要：运用WRF模式对3种不同天气系统(冷锋,低压槽以及台风)造成的广东省酸雨个例进行数值模拟,结合实际测站资料对酸雨分布特征及影响酸雨过程的风场、湿度场以及温度场进行分析.结果表明个例中酸雨主要分布在珠江三角洲区域以及重工业区韶关.不同天气系统影响下的降水酸度略有不同,台风个例降水pH值最高(5.81),其后依次为低压槽降水(5.60)及冷锋降水(5.40).冷锋降水个例中酸雨的分布及变化主要受风速,风向,相对湿度及逆温的影响,低压槽和台风降水个例中的酸雨分布及变化主要受降水量和风速的影响.风速和降水量的增加有利于缓解降水的酸度,而逆温层的存在及不同风向的辐合作用有利于降水酸度的增加.The numerical simulations were carried out on three acid rain processes influenced by different weather systems（cold front,low pressure trough and typhoon） in Guangdong province by WRF mesoscale meteorological model.The acid rain was mainly located in the Pearl River Delta region and an industrial area-Shaoguan.The highest pH value appeared in typhoon case（5.81）,followed by low pressure trough case（5.60） and cold front case（5.40）.The location and variation of cold front acid rain was mainly influenced by wind speed,wind direction,relative humidity,and inversion,the other two types of acid rain was mainly influenced by rainfall and wind speed.The increase in wind speed and rainfall were beneficial to remission the acidity of precipitation,and the existence of the inversion and the wind convergence were conducive to increase the acidity of precipitation.

关 键 词：酸雨 WRF 天气系统 气象条件 

分 类 号：X517[环境科学与工程—环境工程]