基于CMAQ-ISAM模型的长三角典型城市PM_(2.5)来源解析  

Sourcing PM_(2.5) in cities in the Yangtze River Delta by CMAQ-ISAM

作　　者：曹广翰 曹天慧 朱绍东 田旭东 许益超 施耀[1] 何奕[1] CAO Guanghan;CAO Tianhui;ZHU Shaodong;TIAN Xudong;XU Yichao;SHI Yao;HE Yi(College of Chemical and Biological Engineering,Zhejiang University,310027,Hangzhou,Zhejiang,China;Environmental Science Research&Design Institute of Zhejiang Province,310007,Hangzhou,Zhejiang,China;Shaoxing Environmental Monitoring Center Station,312000,Shaoxing,Zhejiang,China;Zhejiang Provincial Ecological Environmental Monitoring Center,310012,Hangzhou,Zhejiang,China;Hangzhou Blue Sky Environmental Technology Co,Ltd,310000,Hangzhou,Zhejiang,China)

机构地区：[1]浙江大学化学工程与生物工程学院,浙江杭州310027 [2]浙江省生态环境科学设计研究院,浙江杭州310007 [3]绍兴市环境监测中心站,浙江绍兴312000 [4]浙江省生态环境监测中心,浙江杭州310012 [5]杭州碧空环境科技有限公司,浙江杭州310000

出　　处：《北京师范大学学报（自然科学版）》2021年第6期803-812,共10页Journal of Beijing Normal University(Natural Science)

基　　金：国家重点研发计划资助项目(2018YFC0213806)。

摘　　要：大气细颗粒物(PM_(2.5))是影响长三角地区空气质量的关键污染物.近年来随着各项环保举措的实施,PM_(2.5)的来源特征也发生了变化,为了制定切实有效的PM_(2.5)治理方案,考察PM_(2.5)的主要来源及其贡献至关重要.本研究使用CMAQ-ISAM模型,定量分析了2018年长三角内4个典型城市(上海、杭州、南京和合肥)PM_(2.5)的主要来源.表明了上述4个城市PM_(2.5)的最主要来源:冬季为长三角外的远距离传输(38.5%~52.6%);秋季为各城市的本地排放(43.0%~50.9%);在春季和夏季,本地排放是上海、杭州和合肥PM_(2.5)的主要来源(春季37.1%~53.3%,夏季44.1%~64.7%),而南京则是周边区域传输(春季38.5%,夏季46.3%).针对冬季不同时期的来源解析表明,相较于清洁时期,4个城市在污染时期来自周边区域传输的贡献占比增大,上海、杭州、南京和合肥的增大幅度分别为10.0%、1.5%、8.1%和4.9%,因此开展长三角大气污染区域联防联控具有重要意义.Atmospheric fine particulate matter(PM_(2.5))is a key pollutant affecting air quality in the Yangtze River Delta(YRD).With implementation of various environmental protection measures in recent years,sources of PM_(2.5) may have changed.To develop an effective PM_(2.5) control strategy,it is vital to identify the main sources of PM_(2.5).The CMAQ-ISAM model was used here to analyze quantitatively main PM_(2.5) sources in Shanghai,Hangzhou,Nanjing and Hefei in 2018.The major source of PM_(2.5) in these 4 cities was found to be long-distance transfer from outside of the YRD region in winter(38.5%-52.6%)but was local emissions in the autumn(43.0%-50.9%).Local emissions were the main source of PM_(2.5) in Shanghai,Hangzhou and Hefei in spring and summer(spring:37.1%-53.3%;summer:44.1%-64.7%),but transfer from surrounding areas was the main source in Nanjing in spring(38.5%)and summer(46.3%).Further source identification in different(clean,pollution)periods within the winter season revealed that,compared with clean period,in the pollution period,contribution ratios from surrounding areas increased,by 10.0%,1.5%,8.1%and 4.9%in Shanghai,Hangzhou,Nanjing and Hefei respectively.Therefore it is important to carry out joint preventions and controls both within and without of the YRD region.

关 键 词：PM_(2.5) CMAQ-ISAM模型 长三角 来源解析 

分 类 号：X513[环境科学与工程—环境工程]