北京市夏季臭氧变化特征的观测研究

Analysis of O_3 Vertical Variation in Summer in Beijing Area

利用2002年7月至8月325 m气象塔资料研究了北京市夏季近地层臭氧浓度变化特征及其与气象因子的关系。结果表明:北京市夏季边界层臭氧浓度日变化显著,臭氧浓度随高度增加而增加;臭氧多数为单峰型分布,双峰型仅分布在底层;臭氧峰值出现时间与气温峰值出现时间基本一致,或略有落后。

Based on the Beijing 325 m meteorological tower, the concentration of O3 and NOx and corresponding meteorological elements such as temperature ,wind and humidity were measured in the urban atmospheric boundary layer in the July and August of 2002. Analysis results show that in summer O3 has remarkably diurnal variation in the boundary layer in Beijing city and the concentration of O3 increases with height ; most of O3 ＇ s diurnal variations are mono-peak pattern, and double-peak pattern only occurs in lower levels;the concentrations of O3 and temperature reach the peak at the same time or O3 lags a little.