【摘要】 对2005年1月~12月上海闸北地区地面空气臭氧污染浓度连续监测结果分析,表明臭氧小时浓度均值超过GB3095-1996《环境空气质量标准》二级标准160μg/m3的频率为2.88%,其中6月份超标率居全年之首,1月、2月和12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时~14时之间,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91μg/m3全年最高,最高小时均值浓度350μg/m3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。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变化的影响分析,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。更多还原

【Abstract】 Ground ozone level was yearly monitored continuously in Shanghai Zhabei ambient air in 2005.Results indicated that 2.88% hourly ozone concentration exceeded 160μg/m³,class 2 of national standard（GB3095-1996）,with the largest non-attainment percentage in June while all data in January,February and December matched standard class 2.Diurnal variation of ozone showed that peak value occurred during 12:00～14:00,with distinct characteristics of photochemical pollutionrelate region.The largest diurnal variation range was found in June and the smallest was found in February.The largest ozone monthly-average concentration was observed in May with the largest hourly concentration 350μg/m³ in May 19,which demonstrated that ozone formation might be impacted by precursor pollution to large extent.The impact of UV light,atmospheric temperature,wind speed,wind direction,precipitation and relative humidity on ozone variation were also studied.The strong correlation of ozone to NO₂/NO ratio was observed in high temperature and sunny days.更多还原