乌鲁木齐市PM10、PM2.5和PM1.0浓度及分布变化特征  

Characteristic of the Concentration and Distribution of PM10,PM2.5 and PM1.0 in Urumqi

作　　者：韩茜[1] 魏文寿[2] 刘新春[1] 钟玉婷[1] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]新疆维吾尔自治区气象局,新疆乌鲁木齐830002

出　　处：《沙漠与绿洲气象》2015年第1期32-38,共7页Desert and Oasis Meteorology

基　　金：公益性科研院所基本科研业务费专项项目(IDM201205);中国沙漠气象科学研究基金项目(Sqj2012009)共同资助

摘　　要：利用GRIMM180气溶胶粒谱分析仪采集乌鲁木齐市PM10、PM2.5和PM1.0数据,研究表明:乌鲁木齐市气溶胶颗粒物质量浓度在进入采暖季后急剧增加,冬季颗粒物中细粒子含量最高,PM2.5/PM10可达77.6%,PM2.5/PM10,PM1.0/PM10,PM1.0/PM2.5三比值体现了颗粒物的分布特征,四季污染程度越高,细粒子含量越高。四季无降水日PM10、PM2.5、PM1.0的质量浓度和分布的日变化基本呈三峰三谷型,出现早—午—晚峰值,上午—下午—午夜后谷值,各季节峰谷值具体出现时间略有差别,由于冬季逆温层顶盖等因素的影响,冬季质量浓度和分布的日变化在此基础上多了两次波动。降水的发生对冬、春季质量浓度的影响大于夏、秋季,对不同粒径段粒子的分布影响有一定差别。Through the analysis of GRIMM180 gathered PM10, PM2.5 and PM1.0 in Urumqi, the result showed： the aerosol mass concentration in Urumqi rapidly increased after the heating season beginning, the content of fine particles is the highest, PM2.5/PM10 can reach 77.6%, PM2.5/PM10,PM1.0/PM10, PM1.0/PM2.5 represent the particle distribution, the more serious the pollution was,the higher the content of fine particles was in four seasons. In the non precipatation day, the diurnal variation curves of mass concentration and distribution of PM10, PM2.5 and PM1.0 basically show the pattern of ＂3 peak-3 valley＂in four seasons, the peak value appeared at ＂morning-noon-evening＂, and the valley values occurred at ＂after morning-afternoon-after midnight＂. Due to the influences of temperature inversion and other factors in the winter, the mass concentration and distribution showed another two ＂peak-valley＂based on the ＂3 peak-3 valley＂pattern. The occurrence of precipation had greater influences on the particulate matter mass concentration in winter and spring than that in summer and autumn, and had different influences on the distribution of different diameter particles.

关 键 词：PM10 PM2.5 PM1.0 日变化 乌鲁木齐市 

分 类 号：X16[环境科学与工程—环境科学]