摘要
在 1 999 0 6 2 3北京市出现长达 1 3d的持续高温期间对细粒子 (PM2 5)质量浓度进行了观测 .数据表明 ,持续高温期间细粒子质量浓度比非高温期间要高出 2～ 3倍 .但是通过对持续高温期间的气象数据进行分析 ,发现还是很利于污染物扩散 .进一步分析同步监测的O3浓度、颗粒物中SO2 - 4的粒径范围及其含量等数据 。
The continued high temperature weather (CHTW) appeared in Beijing since June 23 1999. The measurements showed the PM 2 5 mass concentrations were 2 to 3 times of that in non CHTW period. However the diffusion conditions were still fine in these days. Both the highest hourly concentrations of O 3 and the SO 2- 4 composition in PM 2 5 can identify that the photochemical action was very active. It is the very reason to produce more fine particles in atmosphere.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第4期33-36,共4页
Environmental Science
基金
北京市政府基金项目
