| 2014年北京市城区臭氧超标日浓度特征及与气象条件的关系 |
| 摘要点击 4030 全文点击 2265 投稿时间：2015-12-28 修订日期：2016-01-19 |
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| 中文关键词 臭氧 空间分布 光化学污染 北京 天气型 |
| 英文关键词 O3 spatial distribution photochemical pollution Beijing weather type |
| 作者 | 单位 | E-mail | | 程念亮 | 北京市环境保护监测中心, 大气颗粒物监测技术北京市重点实验室, 北京 100048
北京师范大学水科学研究院, 北京 100875
中国环境科学研究院, 北京 100012 | 15001195306@163.com | | 李云婷 | 北京市环境保护监测中心, 大气颗粒物监测技术北京市重点实验室, 北京 100048 | | | 张大伟 | 北京市环境保护监测中心, 大气颗粒物监测技术北京市重点实验室, 北京 100048 | zhangdawei@bjmemc.com.cn | | 陈添 | 北京市环境保护局, 北京 100048 | | | 王欣 | 北京市环境保护监测中心, 大气颗粒物监测技术北京市重点实验室, 北京 100048 | | | 郇宁 | 北京市环境保护监测中心, 大气颗粒物监测技术北京市重点实验室, 北京 100048 | | | 陈晨 | 北京市环境保护监测中心, 大气颗粒物监测技术北京市重点实验室, 北京 100048 | | | 孟凡 | 北京师范大学水科学研究院, 北京 100875
中国环境科学研究院, 北京 100012 | mengfan@craes.org.cn |
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| 中文摘要 |
| 根据2014年1~12月北京市环境保护监测中心监测的O3浓度数据,综合探讨了北京市O3的时空分布及与其气象条件的关系.结果表明:2014年北京市全年O3小时平均浓度约为56.18 μg·m-3,O3超标日小时平均浓度约为148.05 μg·m-3且超标日主要集中在5~9月;超标日O3日变化呈现单峰型分布,06:00或07:00为低谷,15:00、16:00左右达到峰值;超标日O3浓度在09:00~23:00明显高于夏季同时间段浓度平均;空间分布上中心城区站点O3浓度相对较低,而城区西部植物园站点浓度最高;统计的2014年北京市O3超标日地面形势场3种类型高压类、低压类、均压类各占16%、36%、48%;超标日O3浓度与气压、湿度、能见度呈负相关关系,与风速、温度呈正相关关系; 2014年5月29日~6月1日北京市发生的一次O3重污染过程是由本地光化学污染及区域输送造成的,区域输送对北京市O3浓度有着十分重要的影响. |
| 英文摘要 |
| The spatial-temporal distribution characteristics of O3 and the correlations between O3 and meteorological elements in Beijing urban area were investigated based on the hourly O3 monitoring data from January to December in 2014 released by Beijing Municipal Environmental Monitoring Center. The annual concentration of O3 in Beijing was about 56.18 μg·m-3 in 2014. In the over polluted days during May and September, the O3 concentration could reach as high as 148.05 μg·m-3. The diurnal distribution of ozone presented a clear unimodal pattern with its peak appearing at 15:00 or 16:00 and trough at 06:00 or 07:00 and the concentrations of O3 during 09:00 and 23:00 was significantly higher than those in the Summer time. For the spatial distribution of O3, the concentration was lower in central urban area with the highest concentration appearing at plant garden site in the west of the urban area. Ground weather type of O3 over polluted days was divided into three categories including high-pressure, low-pressure, equalizing field, which accounted for 16%, 36%, 48%, respectively. The concentration of O3 was negatively correlated with the air pressure, humidity and visibility while it was positively correlated with the wind speed and temperature. In one heavy pollution episode of O3 caused by local photochemical pollution and regional transport from May 29th to June 1st in 2014 in Beijing, regional transport showed a very important influence on the concentration of O3 in Beijing. |
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