上海市环境空气NO_2浓度时空分布特征  

Temporal-spatial Distribution Characteristics of Nitrogen Dioxide Concentration in Shanghai Ambient Air

作　　者：夏德祥[1] 徐丽萍[1] 李俊[1] 

机构地区：[1]上海市环境监测中心,上海200030

出　　处：《上海环境科学》2001年第1期43-46,共4页Shanghai Environmental Sciences

摘　　要：为监测机动车尾气造成的氧化型光化学烟雾的污染,采用被动扩散管的监测方法在上海布设65个监测点位。经13个月的连续监测,得出了上海市环境空气中NO2浓度时空分布特征及污染的重点区域。NO2时空分布主要特征:NO2高浓度值出现在交通主干道上(高架出口、隧道口、车辆堵塞的交通要道);NO2浓度空间分布呈市中心区→市郊区→外围农村区逐渐减弱的趋势;总体时序分布呈秋冬季高于春夏季的变化趋势。For effectively monitoring photochemical pollution from vehicle pollutant emission, a passive diffusion tube was used in large survey. After 13 months monitoring, NO2 concentration character of temporal-spatial distribution and pollution area in Shanghai ambient air have been obtained. It provided definite information for photochemical pollution warning system and optimized monitoring network The main temporal-spatial distibution characteristics of NO2 were as follows:peak concentration of NO2 appeared at main traffic road (exit of highway, tunnel and kerbside); spatial distribution of N02 concentration declining gradually from urban→suburban→rural; general temporal distribution showed a trend that NO2 concentration was higher in autumn and winter, and went down to lower value in spring and summer.

关 键 词：环境空气 光化学烟雾 机动车尾气 被动扩散管 时空分布特征 上海 二氧化氮浓度 

分 类 号：X51[环境科学与工程—环境工程]