2007年冬季沈阳典型大气污染源PM_(10)排放模拟  

Simulation analysis of PM_(10) emission from typically atmospheric pollution sources in winter of 2007 over Shenyang

作　　者：邹旭东[1] 田晓波[2] 杨洪斌[1] 汪宏宇[1] 刘玉彻[1] 张云海[1] 

机构地区：[1]中国气象局沈阳大气环境研究所,辽宁沈阳110016 [2]辽宁省气象信息与技术保障中心,辽宁沈阳110015

出　　处：《气象与环境学报》2011年第6期28-34,共7页Journal of Meteorology and Environment

基　　金：中央公益性科研院所基本科研业务费(2011IAE-CMA10);国家自然科学基金(40975084);科技部公益性行业(气象)科研专项(GYHY200806020)共同资助

摘　　要：选取沈阳市区9个典型的大气污染源冬季的PM10排放浓度资料,利用MM5耦合CALPUFF对2007年12月至2008年2月沈阳城市区域气象场和排放PM10浓度分布进行月平均数值模拟。结果表明:冬季沈阳地区受高压控制,北风较强,并经过增强、减弱的过程,多呈现对大气污染物扩散不利的天气形势。高空为偏西风且风速较大时,地面和高空有明显的风向和风速的切变,切变有增强和减弱的变化。2007年冬季沈阳市区域月平均大气污染最严重的是2月,污染物分布主要集中在南部、东南部地区,南部地区大气污染最为严重。PM10浓度分布的范围与风场、地形有直接的关系。地势平坦、风速大时,污染物扩散范围大,污染物浓度小;地势不平、风速小时,污染物扩散范围小,污染物浓度大。According to PM10 concentration data from 9 typically atmospheric pollution sources in the urban area of Shenyang from December 2007 to February 2008, the monthly averages of meteorological fields and PM10 concentration distributions were simulated using MM5 model coupled with CALPUFF model. The results indicate that the highpressure controls Shenyang region in winter and the north wind is strong, and the weather situation is usually unfavorable to pollutants diffusion after they are strengthened and weakened. Shear of wind direction and wind speed is obvious in the ground and at high level when it is the westerly wind at high level and wind speed is large, and shear could be strengthened or reduced. The most serious air pollution occurs in February 2007 over the Sbenyang city. The pollutants mainly distributes in the south and southeast of Shenyang, especially in the south. The distribution ranges of PM10 concentrations are related to wind fried and topography. The diffusion ranges of pollutants are large and the concentrations of pollutants are small when topography is flat and wind speed is large, and vise versa.

关 键 词：大气污染 CALPUFF 数值模拟 气象场 沈阳 冬季 

分 类 号：X16[环境科学与工程—环境科学]