Assessing Spatial and Temporal Patterns of Observed Ground-level Ozone in China.
Assessing Spatial and Temporal Patterns of Observed Ground-level Ozone in China.
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评估中国观测到的地面臭氧的时空格局
DOI：
10.1038/s41598-017-03929-w
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发表时间：
2017-06-16
影响因子：
4.6
通讯作者：
Zhang XC
中科院分区：
文献类型：
--
作者：
Wang WN;Cheng TH;Gu XF;Chen H;Guo H;Wang Y;Bao FW;Shi SY;Xu BR;Zuo X;Meng C;Zhang XC
地面臭氧（O3）升高是空气质量的一个重要方面，与公众健康有关，已引起越来越多的关注。利用2013-2015年中国国家空气质量监测网数据，分析了中国地面O3浓度的时空分布特征。本研究分析了O3浓度的日变化、月变化和年变化，并对人口密集区和人口稀少区的O3浓度变化进行了比较。特别是，6个主要的中国城市，北京，成都，广州，兰州，上海和乌鲁木齐，位于黑河-腾冲线两侧，以允许详细讨论O3水平的变化。数据显示，全国地面O3的3年MDA 8为80.26 μg/m3。地面O3浓度呈月变化，夏季最高，冬季最低。日周期在上午达到最小值，下午达到最大值。2015年，北京、成都、兰州和上海的O3 MDA 8年均浓度分别比2013年上升了12%、25%、34%和22%。与世界卫生组织O3指南相比，北京、成都、广州和上海在2013年至2015年超过30%的日子里遭受了超过8小时O3标准的O3污染。
Elevated ground-level ozone (O3), which is an important aspect of air quality related to public health, has been causing increasing concern. This study investigated the spatiotemporal distribution of ground-level O3concentrations in China using a dataset from the Chinese national air quality monitoring network during 2013–2015. This research analyzed the diurnal, monthly and yearly variation of O3concentrations in both sparsely and densely populated regions. In particular, 6 major Chinese cities were selected to allow a discussion of variations in O3levels in detail, Beijing, Chengdu, Guangzhou, Lanzhou, Shanghai, and Urumchi, located on both sides of the Heihe-Tengchong line. Data showed that the nationwide 3-year MDA8 of ground-level O3was 80.26 μg/m3. Ground-level O3concentrations exhibited monthly variability peaking in summer and reaching the lowest levels in winter. The diurnal cycle reached a minimum in morning and peaked in the afternoon. Yearly average O3MDA8 concentrations in Beijing, Chengdu, Lanzhou, and Shanghai in 2015 increased 12%, 25%, 34%, 22%, respectively, when compared with those in 2013. Compared with World Health Organization O3guidelines, Beijing, Chengdu, Guangzhou, and Shanghai suffered O3pollution in excess of the 8-hour O3standard for more than 30% of the days in 2013 to 2015.