Source apportionment of fine particulate matter during autumn haze episodes in Shanghai, China
Source apportionment of fine particulate matter during autumn haze episodes in Shanghai, China
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上海秋季霾天气细颗粒物来源解析
DOI：
10.1002/2013jd019630
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发表时间：
2014-02-27
影响因子：
4.4
通讯作者：
Wumaer, Akemu
中科院分区：
文献类型：
--
作者：
Wang, Yangjun;Li, Li;Wumaer, Akemu
了解细颗粒物的来源对上海灰霾的防治具有重要意义。本文利用扩展的综合空气质量模式中的颗粒物源近似技术，定量分析了2010年11月6日至22日上海市秋末重度灰霾天气过程中大气细颗粒物（PM2. 5）及其重要组分浓度随排放的变化规律。这里考虑的因素是上海及其周边地区的区域，远距离区域传输，以及不同的本地排放类别。结果表明，工业过程是占主导地位的本地贡献者在整个城市的总PM2.5质量，除了在城市中心的汽车排放的贡献略大。此外，工业生产和机动车排放是上海市硝酸盐的主要贡献者，但在城市中心区，机动车排放的贡献更大。一般来说，局地贡献和区域输送贡献都可以主导深秋的一次严重灰霾天气。然而，主要的贡献者可能是当地排放或区域迁移，通常取决于气象条件。因此，应特别关注上游相邻省份的排放控制，以及局部地区，以制定有效的策略来减少上海的PM2. 5污染。
Understanding the origin of fine particulate matter is essential to proposing proper strategies for heavy haze mitigation in Shanghai, China. In this study we used the Particulate Matter Source Apportionment Technology in Comprehensive Air Quality Model with Extensions to quantify the impacts of emissions on the concentrations of fine particulate matter (PM2.5) and its important components in Shanghai during heavy haze episodes in late autumn (6–22 November 2010). The factors considered here are regions of Shanghai and its surrounding areas, long‐range regional transport, and different local emission categories. The results indicate that industrial process is the dominant local contributor to total PM2.5 mass in the whole city except that at the urban center vehicle emission contributes slightly more. In addition, industrial process and vehicle emission are the major local contributors for nitrate in Shanghai, although at urban core the contribution from vehicle emission is remarkably larger. Generally, both local contribution and regional transport contribution could dominate a severe haze event in late autumn. However, the dominant contributor could either be local emission or regional transport, usually depending on the meteorological conditions. Therefore, particular attentions should be paid to the emission control in the upwind adjacent provinces, as well as in local areas, for developing effective strategies to reduce PM2.5 pollution in Shanghai.