Abstract：Based on the aircraft sounding concentrations data of nitrogen oxides (NOx), Sulfur dioxide (SO2), Carbon monoxide (CO) and ozone (O3) over Beijing area from 2007 to 2010, the temporal and spatial distribution of atmospheric pollutants concentrations from the ground surface to 3500m altitude were studied. Vertical profiles of monthly average concentrations of NOx, SO2 and CO were in good agreement during April to November, that decreased with the raising of altitude, but concentrations of O3 first increased and then decreased. Low concentrations of NOx, SO2 and CO appeared in the high temperature months (July to October) and their high concentrations appeared in the low temperature months (April to June, November), and O3 concentrations were lower in spring and autumn (April, October to November), but that were higher in summer (May to September). In a daytime, pollutants concentrations at different altitude change with time were not consistent, and hourly change of pollutants concentrations below 1500m altitude, were significantly higher than that in 1500~3500m altitude. The characteristic of regional horizontal distributions of pollutants was that higher concentrations appeared in the urban area of Beijing, higher pollutants concentrations areas were in the northern, southwestern (Beijing-Baoding direction) and southeastern sections (Beijing-Tianjin direction), lower pollutants concentrations areas were in the northwestern sections (Beijing-Zhangjiakou direction).
