沈阳市PM_(2.5)分布研究  

Study on PM_(2.5) Distribution in Shenyang City

作　　者：邹旭东[1] 刘海龙 王笑影[1] 张云海[1] 贾庆宇[1] 汪宏宇[1] 孙凤华[1] 杨洪斌[1] ZOU Xu-dong;LIU Hai-long;WANG Xiao-ying;ZHANG Yun-hai;JIA Qing-yu;WANG Hong-yu;SUN Feng-hua;YANG Hong-bin(Shenyang Institute of Atmospheric Environment, China Meteorological Administration,Shenyang 110166, China;Liaoning Province Meteorological Equipment Support Center,Shenyang 110166, China)

机构地区：[1]中国气象局沈阳大气环境研究所,沈阳110166 [2]辽宁省气象装备保障中心,沈阳110166

出　　处：《湖北农业科学》2018年第9期50-57,61,共9页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(41375146);中央级公益性科研院所基本科研业务项目(2017;2016);辽宁省气象局课题(2015)

摘　　要：利用沈阳市内11个监测点2013年PM_(2.5)的监测资料,分析PM_(2.5)的年、月、日、时的分布特征,对比分析气温、地表温度、湿度、风速、气压、降水和PM_(2.5)的相关性。结果表明,全年PM_(2.5)浓度在张士、二毛、太原街监测点相对较高,炮兵学院、辉山监测点相比较低;各监测点PM_(2.5)月均浓度以1月最高,最大日均浓度出现在12月,冬季星期内各日均值和日内各小时均值变化明显;风速和PM_(2.5)浓度呈负相关,湿度、0 cm地温、气温、气压、降水和PM_(2.5)浓度呈正相关。对12月22日沈阳市发生严重污染天气进行了分析,500h Pa位势高度场处于弱暖脊;850 h Pa位势高度场和地面风场受辐散下沉气流的影响,风速较低;垂直剖面风场下沉气流明显,地表出现湿度高值;地面至高空的温度廓线上,低空有明显的逆温;在污染最严重的时候,边界层高度处于低值。Using monitoring data of PM（2.5） in 2013 from 11 monitoring sites in Shenyang city,the distribution characteristics of PM（2.5） in years,months,days and hours were studied,and the correlations between PM（2.5） concentration and each of air temperature,ground temperature,humidity,wind speed,air pressure and precipitation were analyzed. The results showed that the PM（2.5） concentration of Zhangshi,Ermao and Taiyuanjie monitoring stations was relatively high throughout the year,and that of school of Artilley,Huishan monitoring point was relatively low. The monthly average PM（2.5） concentration value of each monitoring point was highest in January,the largest average daily concentration occurred in December. In winter,the daily and hourly change of PM（2.5） concentration was obvious. Wind speed had negative correlation with PM（2.5） concentration,while humidity,ground temperature,air temperature,air pressure, precipitation with PM（2.5） concentration had positive correlation. The weather situation of severe pollution in Shenyang city in December 22 was analyzed,the results indicate that it was the weak warm ridge in Liaoning province at 500 h Pa geopotential height field. While it was influenced by divergence and downdraft at 850 h Pa geopotential height field and the ground wind field,wind speed were small. In vertical wind field,the downdraft was obvious.Significant temperature inversion occurred on the temperature profile from the ground up to the high altitude. When the pollution was most severe,the boundary layer was at a low level.

关 键 词：PM2.5 分布特征 气象条件 沈阳市 

分 类 号：P463.1[天文地球—大气科学及气象学]