Ozone and fine particle in the western Yangtze River Delta: an overview of 1 yr data at the SORPES station
Ozone and fine particle in the western Yangtze River Delta: an overview of 1 yr data at the SORPES station
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长三角西部地区臭氧和细颗粒物：SORPES 站 1 年数据概览
DOI：
10.5194/acp-13-5813-2013
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发表时间：
2013-01-01
影响因子：
6.3
通讯作者：
Kulmala, M.
中科院分区：
文献类型：
--
作者：
Ding, A. J.;Fu, C. B.;Kulmala, M.
抽象的。本文介绍了中国东部长江三角洲（YRD）西部最近建立的区域背景观测站（SORPES）对臭氧（O3）、细颗粒物（PM2.5）和相关痕量气体的1年观测结果。O3和PM2.5均表现出较强的季节性变化，但变化规律相反：O3在暖季达到最大值，而PM2.5在冷季达到最大值。相关性分析表明，VOC敏感的制度O3化学和形成的二次气溶胶在夏季高O3的条件下。与中国国家环境空气质量标准相比，我们的测量报告15天的O3浓度和148天的PM2.5浓度在1年的时间内，表明该地区的空气污染严重的情况。典型O3和PM2.5事件的个案研究显示，这些事件一般与长江中游的空气质量输送路径有关，即，沿着南京-上海轴及其城市群的空气污染，并显示天气的空气污染，特别是O3的起着重要的作用。农业焚烧活动导致高PM2.5和O3污染在收获季节，特别是在6月。基于拉格朗日扩散模拟的潜在源贡献计算表明，来自YRD的排放贡献了超过70%的O3前体CO，其中大部分来自YRD中期。长江以北和华北平原是该地区PM2.5污染的主要贡献者。这项工作表明，工业化和城市化对长三角地区的环境产生了重要影响，并建议通过不同行政区域之间的协同控制措施来改善这些地区的空气质量。
Abstract. This work presents an overview of 1 yr measurements of ozone (O3) and fine particular matter (PM2.5) and related trace gases at a recently developed regional background site, the Station for Observing Regional Processes of the Earth System (SORPES), in the western part of the Yangtze River Delta (YRD) in eastern China. Ozone and PM2.5 showed strong seasonal cycles but with contrast patterns: O3 reached a maximum in warm seasons but PM2.5 in cold seasons. Correlation analysis suggests a VOC-sensitive regime for O3 chemistry and a formation of secondary aerosols under conditions of high O3 in summer. Compared with the National Ambient Air Quality Standards in China, our measurements report 15 days of O3 exceedance and 148 days of PM2.5 exceedance during the 1 yr period, suggesting a severe air pollution situation in this region. Case studies for typical O3 and PM2.5 episodes demonstrated that these episodes were generally associated with an air mass transport pathway over the mid-YRD, i.e., along the Nanjing–Shanghai axis with its city clusters, and showed that synoptic weather played an important role in air pollution, especially for O3. Agricultural burning activities caused high PM2.5 and O3 pollution during harvest seasons, especially in June. A calculation of potential source contributions based on Lagrangian dispersion simulations suggests that emissions from the YRD contributed to over 70% of the O3 precursor CO, with a majority from the mid-YRD. North-YRD and the North China Plain are the main contributors to PM2.5 pollution in this region. This work shows an important environmental impact from industrialization and urbanization in the YRD region, and suggests an urgent need for improving air quality in these areas through collaborative control measures among different administrative regions.