| 2013年12月中国中东部地区严重灰霾期间上海市颗粒物的输送途径及潜在源区贡献分析 |
| 摘要点击 5127 全文点击 5832 投稿时间：2014-12-10 修订日期：2015-03-17 |
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| 中文关键词 潜在源贡献因子法 权重分析法 输送途径 潜在源区 上海 |
| 英文关键词 potential source contribution function analysis concentration-weighted trajectory transportation path potential source region Shanghai |
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| 中文摘要 |
| 2013年12月初中国中东部地区发生了入冬以来最为严重的一次长时间、大范围的高浓度颗粒物污染过程,期间上海市PM10小时浓度最大值超过700μg ·m-3, PM2.5最大小时浓度超过600 μg ·m-3. 为研究此次严重灰霾污染期间影响上海的污染气团的主要传输途径,采用HYSPLIT后向轨迹结合聚类分析方法,探讨了本次污染事件中到达上海的主要气团轨迹,结合上海城区在线观测的PM10小时浓度资料,通过计算潜在源贡献因子PSCF和浓度权重轨迹CWT,分析了影响上海2013年12月PM10质量浓度的潜在源区,并探讨了不同源区对上海市PM10质量浓度贡献的差异. 结果表明,西北路径和北路径是污染事件中的主要输送通道,在到达上海的气团轨迹中,大陆气团和海洋气团分别占总轨迹的79.6%和20.4%,影响上海的潜在源区除长三角一带的江苏、浙江和安徽等人口密集,工业、重工业和交通污染严重的地区以外,山东、河北、河南等地对于上海城区颗粒物污染亦有一定贡献. 研究表明,区域大气污染联防联控乃至跨区域联动对于应对当前频发的重污染态势具有极为重要的意义. |
| 英文摘要 |
| A heavy haze pollution episode occurred in early December, 2013 in middle and eastern China, which lasted for a long period, and covered a large area. During this episode, the hourly maximum concentrations of PM10 and PM2.5 in Shanghai exceeded 700 μg ·m-3 and 600 μg ·m-3, respectively. To obtain the major air mass transportation path, trajectories reaching urban Shanghai area were analyzed using HYSPLIT model and cluster analysis. Potential Source Contribution Function (PSCF) and Concentration-Weighted Trajectory (CWT) methods were applied to study the potential source regions and the individual contributions to PM10 in Shanghai in December, 2013. The results showed that the northwest and the north paths were the major air mass transport paths in December, among which 79.6% of the total trajectories came from mainland, while 20.4% reached Shanghai through the ocean. These were the main transportation paths causing high PM10 mass concentration in December in Shanghai. The potential regions affecting the heavy haze episode in early December in Shanghai were distributed in the Yangtze River Delta including Jiangsu, Zhejiang and Anhui. Besides, air mass from Shandong, Hebei and Henan also had certain impact. The results showed that regional and even super-regional pollution joint control was of significant importance to reduce the frequent heavy air pollution episodes. |
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