| 北京市臭氧的时空分布特征 |
| 摘要点击 4827 全文点击 2520 投稿时间：2014-05-26 修订日期：2014-07-02 |
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| 中文关键词 北京市 臭氧 时间分布 空间分布 臭氧传输 |
| 英文关键词 Beijing ozone temporal distribution spatial distribution ozone transmission |
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| 中文摘要 |
| 对2012年12月~2013年11月期间北京市35个自动空气监测子站的O3浓度进行分析，探讨北京市O3浓度的时间、空间分布特征，并对夏季的一次O3高浓度过程进行了分析. 结果表明，北京市O3浓度在5~8月维持相对较高浓度，其他月份则维持较低浓度. 整体来看，4类功能的监测站点中O3平均浓度由高到低分别是对照点及区域点、郊区环境评价点、城区环境评价点和交通污染监控点；O3浓度日变化呈单峰型分布，一般在15：00、16：00达到峰值；O3还呈现明显的"周末效应"，即周末白天时段O3浓度大于工作日浓度. 北京市O3浓度城区相对较低，周边区县相对较高，生态植被优良的东北部地区浓度最高. 2013年6月3日北京市发生一次O3高浓度过程，在下午西南风的作用下，榆垡、丰台花园、奥体中心和怀柔监测站O3峰值出现的时间从南到北依次滞后，且怀柔站在20：00才出现峰值，体现了这次过程中存在明显的O3输送特征. |
| 英文摘要 |
| Ozone concentrations obtained from 35 automatic air monitoring stations in Beijing were analyzed to investigate their temporal and spatial distribution characteristics. A process with high ozone concentration in summer was analyzed. The results showed that ozone maintained relatively high concentration from May to August while in other months, the ozone concentration was at a low level. Overall, the average concentrations of ozone in different stations in a descending order were comparison and regional station, suburban environment evaluation station, urban environmental assessment station and traffic pollution monitoring station. Ozone diurnal variation showed a single peak distribution, the peak of which appeared at 15:00 or 16:00. Ozone concentration showed obvious weekend effect, which meant ozone concentration in daytime of weekend was higher than that in weekday. Ozone concentration was lower in urban Beijing, higher in surrounding counties and the highest in northeast area with more vegetation. A high ozone concentration process occurred in Beijing on June 3, 2013. Under the effect of southwest wind in the afternoon, the concentration peaks of ozone in Yufa, Fengtaihuayuan, Olympic center and Huairou station occurred in order from south to north. Concentration peak of ozone in Huairou station occurred at 20:00 in the night. It could be concluded that significant ozone transmission characteristic was reflected in this process. |
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