【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。更多还原

【Abstract】 For understanding the spatial distribution characteristics of atmospheric NO₂ concentration in Chongqing city,the feasibility of a type of passive sampler for monitoring atmospheric NO₂ was studied,and continuous observation by this passive sampler was （carried） out in Chongqing downtown with an area of 2600 Km² during spring. As shown by the results,NO₂ 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 NO₂ concentration between districts except Nan’an district during the two sequential observations.更多还原