作　　者： ; ; ; ;

机构地区： 北京林业大学环境科学与工程学院

出　　处： 《环境科学研究》 2010年第5期601-605,共5页

摘　　要： 通过对北京市2009年夏季3种典型道路(开阔道路、交叉道路、街道峡谷)环境中O3,O3前体物(NO,NMHCs等)及气象因子的监测,分析了北京市典型道路环境中ρ(O3)的变化规律及O3前体物质量浓度与气象因子对ρ(O3)的影响.结果表明:夏季北京市典型道路环境中ρ(O3)呈明显的日间单峰变化规律,这与非道路环境并无不同.不同类型道路环境中ρ(O3)的变幅与峰值出现时间有所不同;3种典型道路环境中ρ(O3)与ρ(NO),ρ(NMHCs)等均呈良好的负相关关系,与ρ(NO2),ρ(NO2)/ρ(NO)呈良好的正相关关系;3种类型道路环境中ρ(O3)均呈现出与紫外强度、温度相同的变化趋势,而与相对湿度的变化趋势相反,ρ(O)高值出现于高温、强紫外线与低湿度的时刻,ρ(O)变化略滞后于紫外强度变化. Ozone concentration and its influencing factors-such as precursors and meteorological conditions-around typical road types in Beijing were investigated in summer 2009.The purpose was to acquire the ozone variation characteristics and the influence of precursor concentration and meteorological conditions on ozone concentration in broad roads,crossroads and canyon roads.The diurnal variation of ozone concentration around traffic roads showed a very clear cycle,with one peak similar to other urban areas,although ozone concentration varies in different contexts and the peak time is also different.The ozone concentration was negatively correlated with concentrations of its precursors,such as the concentration of NO and NMHCs,and positively correlated with NO2 concentration and the concentration ratio of NO2 and NO.The diurnal variation of ozone concentration was similar to those of UV radiation and temperature,and opposite with humidity.The influence of UV radiation on ozone concentration occurs with a small delay;the high value of ozone concentration occurs while the UV radiation is strong,the temperature is high and the humidity is low.

关 键 词： 臭氧 前体物 气象条件 典型道路 北京

领　　域： [环境科学与工程]