Analysis of ozone precursor concentration and its weather conditions in summer in Beijing

Based on surface atmospheric photochemistry concentration observation data in summer of 2003 in Beijing observation station,ozone concentration of exceeding standard day,ozone precursor concentration and the distribution characteristics of ozone concentration in different weather conditions were analyzed.The results indicated that the characteristics of NO_2 concentration and NO concentration as well as CO concentration were similar to that of Kanagawa in Japan.If the value of NO_2/NO was beyond 29,ozone concentration exceeded the standard easily.Ozone concentration could be influenced by VOC concentration.Under the conditions of warm and wet current control,faint ground wind or calm and cloudy weather with high humidity,ozone concentration exceeded the standard easily,too.All these were significant to research and prevention of atmospheric photochemistry pollution.