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.
作者
曹广翰
曹天慧
朱绍东
田旭东
许益超
施耀
何奕
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)
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
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)。
