摘要
为研究长三角地区城市O3污染特征及其影响因素,对长三角地区25个城市2013年国家环境监测点位和国家气象台数据进行了统计分析.结果表明：除淮安外,其余24个城市均存在不同程度的O3日超标现象,超标率在1.6%-15.1%之间,平均为5.8%,低于珠三角地区（8.9%）和京津冀地区（9.7%）.5—8月是长三角地区O3污染最为严重的月份,而这一时期颗粒物污染相对较轻,因此,O3与颗粒物污染在时间上呈相反的态势.从空间分布看,长三角地区O3污染呈现较为明显的连片分布特征,上海及周边城市O3污染较重.机动车数量影响城市O3污染：各城市民用汽车保有量与各城市NO2年均浓度、O3超标天数有显著的相关性,相关系数分别为0.672和0.564;每日O3小时浓度高峰值与车流量高峰基本吻合.高温、长时间日照容易出现O3浓度的高值;随着相对湿度、风速的增加,O3超标频率和浓度均值都表现为先升后降的规律.
To investigate the pollution characteristics and influence factors of ozone,this article analyzed the data collected at national environmental and meteorological monitoring stations in 25 cities of Yangtze River Delta in 2013. Results showed that：（ 1） O3 concentrations in 24 cities exceeded the ClassⅡ Ambient Air Quality Standard（ GB 3095—2012） to different degrees except Huai＇an city. The O3 exceedance rate ranged from 1. 6% to 15. 1% with an average of 5. 8%,which was below the rate of Pearl River Delta（ 8. 9%） and Beijing-Tianjin-Hebei region（ 9. 7%）.（ 2） The pollution levels of O3 were the worst from May to August,but the pollution of PM is relatively mild in the same period with an opposite trend in monthly variation.（ 3） From the spatial distribution,the O3 pollution in Yangtze River Delta showed continuous distribution. Shanghai and the surrounding cities were more polluted.（ 4）The number of private cars was significantly related to the annual concentration of NO2 and the number of days with O3 nonattainment,and the correlation coefficients were 0. 672 and 0. 564 respectively. The peak of daily traffic flow was basically corresponded to O3 hourly concentration peak.（ 5） High temperature and long-time sunshine led to high O3 concentration. With the increasing of relative humidity and wind speed,O3 exceeded rate and average concentration showed a trend of firstly increasing and then decreasing.
出处
《环境科学学报》
CAS
CSCD
北大核心
2015年第8期2370-2377,共8页
Acta Scientiae Circumstantiae
基金
林业公益性行业科研专项经费项目(No.201304301)~~
关键词
O3
长江三角洲
影响因素
气象因素
O3
Yangtze River Delta
impact factors
meteorological factors
作者简介
易睿（1984-），女，E-mail：598388901@qq．com；
责任作者：李名升（1981-），男，博士，高级工程师，主要从事环境质量综合评价研究，在国内外期刊发表论文30余篇．E—mail：lims@cFlemc．cn．
