济南市区近地面臭氧浓度变化特征

利用2003年9月～2004年8月一年内的O3连续自动监测数据,对济南市大气中O3浓度的频率分布、日变化、季变化等特征进行分析。实验结果表明,O3小时平均浓度达到《环境空气质量标准》(GB3095-1996)二级标准的频率为98.67%;O3浓度在一天中呈明显的单峰型变化规律,14:00左右达到日最高值;四季的O3浓度日变化均呈单峰型,夏季高O3浓度值出现频率较多,冬季浓度普遍较低,春季的平均浓度最高;在所监测的一年周期内,O3浓度呈现明显的单峰型变化规律:秋季逐渐降低,冬季达到最低,春季升高,夏季最高。

Characterization of Ozone Concentration for Urban Areas of Jinan City

The frequency distribution as well as diurnal and seasonal variation of ozone concentration of Jinan, Shandong Province was studied by analysis of automatic and continuous monitoring data from September 2003 to August 2004. Results showed that the frequency of ozone concentration less than 200μg/m3 was 98.67%, and ozone concentration during whole day displayed an obvious single peak diurnal variation with the maximum at 14:00pm. The diurnal variation of each season in the whole year also displayed a single peak, with high level concentration mostly recorded in summer, lower level concentration recorded in winter while the maximum seasonal average concentration recorded in spring. The ozone concentration of the whole year displayed obvious single peak diurnal variation, which gradually decreased in autumn until to the minimum in winter, then gradually increased in spring until to the maximum in summer.