摘要
为了解重庆市大气中NO2浓度空间分布特征,研究了一种被动式采样器在该地区野外采集大气NO2的可行性,并在2004年3～5月期间利用这种采样器对重庆城区2600Km2范围大气中的NO2进行了连续观测。结果表明:NO2浓度值随城区类型、观测点位置不同有一定的差异,其分布与交通强度密切相关;前后两次观测有相同(除南岸区外)的区间浓度梯度。
For understanding the spatial distribution characteristics of atmospheric NO_2 concentration in Chongqing city,the feasibility of a type of passive sampler for monitoring atmospheric NO_2 was studied,and continuous observation by this passive sampler was (carried) out in Chongqing downtown with an area of 2600 Km^2 during spring. As shown by the results,NO_2 concentration varies with types of districts and locations of sampling sites,and its distribution is well correlated with traffic intensity. In addition,there is a uniform (gradient) of NO_2 concentration between districts except Nan'an district during the two sequential observations.
出处
《四川环境》
2005年第1期34-37,共4页
Sichuan Environment
基金
重庆市大气环境容量测算项目资助[重庆市环境保护局(环)2004 01]
关键词
被动采样器
二氧化氮
空间分布
Passive sampler
nitrogen dioxide
spatial distribution
