文献类型：期刊文献

中文题名：上海市中心城区低空大气臭氧污染特征和变化状况

英文题名：Pollution Characteristics and Variation Patterns of Ozone in Low-Leve Air in Central Urban Area of Shanghai

作者：张爱东[1];王晓燕[1];修光利[2]

机构：[1]上海市闸北区环境监测站,上海200072;[2]华东理工大学环境咨询研究中心,上海200237

年份：2007

卷号：26

期号：2

起止页码：62

中文期刊名：上海环境科学

外文期刊名：Shanghai Environmental Sciences

收录：CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：臭氧;污染特征;低空大气;中心城区;上海市

外文关键词：Ozone Pollution characteristics Low-level air Central urban area Shanghai

摘要：通过上海市中心城区空气质量自动监测点的监测数据，对2005年1～12月上海闸北地区低空（距地面约25m）大气臭氧（O3）污染浓度的连续监测结果进行了分析．结果表明，臭氧小时浓度均值超过GB3095-1996（（环境空气质量标准》中二级标准（160pg／m^3）的频率为2．88％，其中6月份超标率居全年之首，1、2．12三个月超标率为零。臭氧浓度日变化规律表明，日最大值出现在12：00～14：00之间，具有受污染地区光化学过程臭氧生成的典型日变化特征。臭氧浓度日振幅6月最大，2月最小。5月份臭氧月均浓度91ug／m^3，为全年最高；最高小时均值浓度3501Jg／m^3出现在5月19日，说明上海中心城区空气中臭氧生成可能受到前体污染物的浓度影响更大。同时，分析了太阳紫外辐射、气温、风速、风向、相对湿度、降水等气象因素的变化对O3变化的影响，在高温晴朗的天气中观察到NO2／NO比值与O3成显著线性关系。
Ozone contents in the low-level air （about 25 metres above the ground level） were continuously monitored all the year round in Zhabei District of Shanghai in 2005. An analysis on those data showed that 2.88% of hourly ozone concentrations exceeded 160pg/m^3, the Class 2 limit of the national ambient air quality standard （GB 3095-1996）, while the most exceedence occurring in June but all in compliance in January, February and December. In terms of daily variation, the ozone contents rose to peak values during the hours of 12：00 to 14：00 with a typical pattern of the ozone formation found in photochemical processes in a polluted region. Regards a daily fluctuation of the ozone contents, the maximum one occurred in June while the minimum one did in February. The highest monthly average concentration of ozone reached 91pg/m^3 occurring in May while the greatest hourly concentration up to 350pg/m^3 observed on 19 May. It has indicated that the ozone formation might be more affected by the contents of precursory pollutants to some extent. Influences of the meteorological factors such as solar UV radiation, air temperature, wind speed, wind direction, relative humidity and precipitation on the change in ozone contents were also studied. A strong linear correlation between ozone and the ratio of NO2 to NO contents was observed in high temperature and sunny days.