An Junlin, Li Xin, Wang Yuesi, Shi Liqing, Hu Fei, Xu Yongfu
Department of Environment Science, Nanjing Institute of Meteorology, Nanjing 210044, China.
Huan Jing Ke Xue. 2003 Nov;24(6):43-7.
Based on the Beijing 325 m meteorological tower, O3, NOx and CO concentrations and meteorological parameters in urban atmospheric boundary layer were measured in July 2002. The variations of O3 concentration were remarkably different among the five levels. Contrasted with the higher levels, the daily variations were clear and the difference values between day and night were large in the lower levels. It was also found that the photochemistry reaction was an important source in boundary layer in daytime and precipitation process could arouse marked change of O3 concentration.
