南京地区PM_(2.5)污染特征及其影响因素分析  

Analysis of the Polution Characteristics & Influence Factors of PM_(2.5) in Nanjing Area

作　　者：魏玉香[1] 银燕[2] 杨卫芬[2] 芮冬梅[1] 杭维琦[1] 

机构地区：[1]南京市环境监测中心站,江苏南京210013 [2]南京信息工程大学中国气象局大气物理与大气环境重点开放实验室,江苏南京210044

出　　处：《环境科学与管理》2009年第9期29-34,共6页Environmental Science and Management

基　　金：南京市环保局科技项目(200609);南京市建委科技项目(200611J)

摘　　要：文章利用2007年南京市草场门和迈皋桥采样点的PM2.5在线监测资料研究了南京地区PM2.5浓度的时空变化特征。对PM2.5质量浓度进行了月季变化、日变化特征分析。并利用同时期气象资料分析了PM2.5浓度与气象条件的关系。结果表明,南京市细颗粒物污染较严重,草场门采样点各月超标率均在55%以上,年超标率达72%;2采样点各季节霾天气下PM2.5质量浓度均大于非霾日下浓度均值,不管是霾天气还是非霾天气下,草场门采样点各季节PM2.5质量浓度均高于迈皋桥采样点(除秋季非霾天气)。2007年南京市PM2.5质量浓度呈现出春冬季节较高、夏秋季节较低的特点;日变化呈双峰分布。对PM2.5质量浓度与水平能见度的相关性研究表明,南京市大气能见度与细粒子质量浓度呈现很好的负相关性,相关系数高达0.98。草场门采样点霾天气下平均能见度水平仅5.2 km,最高能见度为13 km,最低为1.7 km。The article has researched the time and space changes characteristics of PM2.5 density in Nanjing area by 2007 online monitoring material at Caochangmen ＆ Maigaoqiao sampling spots. It analised monthly change, daily change of PM2.5 density ＆ analised the relationship between PM2.5 ＆ weather condition by simihanous meteorogieal data. The results showed that Nanjing fine granule waste poluts seriously, the excessive rate at Caochangmen is 55% each month, the annul excessive rate has reehed 72% ; 2 sampling spots PM2.5 density under hazy days is larger than the average value of non - hazy days. However it is hazy day or non - hazy day, the PM2.5 quality density at various Caochangmen sampling spots is larger than that at Maigaoqiao sampling spot （ except non - hazy days in autumn ）. 2007 Nanjing PM2.5 quality density appears comprativdy high in Spring ＆ Winter, comparatively low in Autumn ＆ Summer. Daily change appears double peaks diagram. The research on relativity of PM2.5 quality density ＆ level visiblity shows that atmospheric visibility and fine granule exists sound negative relativity, the index of relativity has reached 0. 98. The average visibility under hazy days at Caozhangmen is 5.2 kin, highest 13 km, lowest 1.7 km.

关 键 词：PM2.5 霾 气象因子 能见度 

分 类 号：X51[环境科学与工程—环境工程]