Regionally-Varying Combustion Sources of the January 2013 Severe Haze Events over Eastern China
Regionally-Varying Combustion Sources of the January 2013 Severe Haze Events over Eastern China
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DOI：
10.1021/es503855e
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发表时间：
2015-02-17
影响因子：
11.4
通讯作者：
Gustafsson, Orjan
中科院分区：
文献类型：
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作者：
Andersson, August;Deng, Junjun;Gustafsson, Orjan
2013年1月，中国东北地区出现了严重的雾霾天气，严重影响了区域气候和人类呼吸系统健康。本文对2013年1月华北平原（北京）、长江三角洲（上海）和珠江三角洲（广州）三个重点热点地区（特大城市）的燃烧衍生黑碳气溶胶（BC）进行了双碳同位素约束（δ C-14和δ C-13）源解析。BC，在这里被量化为单质碳（EC），是PM2.5中最有害健康的成分之一，也是一种强烈的气候变暖剂。结果表明，在这三个地区，这些严重的雾霾事件受到生物质燃烧的影响相同（接近30%），而主要化石燃料成分的来源在南北之间存在显著差异。在NCP区域，煤炭燃烧占EC的66% (46-74%,95% C.I.)，而在长三角和珠三角区域，液体化石燃料燃烧（如交通）分别占46%（18-66%）和58%（38-68%）。综上所述，这些发现表明，有必要在气候模式中对BC源进行区域特定描述，并针对东亚地区的严重空气污染事件采取适合该地区的缓解措施。
Thick haze plagued northeastern China in January 2013, strongly affecting both regional climate and human respiratory health. Here, we present dual carbon isotope constrained (Delta C-14 and delta C-13) source apportionment for combustion-derived black carbon aerosol (BC) for three key hotspot regions (megacities): North China Plain (NCP, Beijing), the Yangtze River Delta (YRD, Shanghai), and the Pearl River Delta (PRD, Guangzhou) for January 2013. BC, here quantified as elemental carbon (EC), is one of the most health-detrimental components of PM2.5 and a strong climate warming agent. The results show that these severe haze events were equally affected (similar to 30%) by biomass combustion in all three regions, whereas the sources of the dominant fossil fuel component was dramatically different between north and south. In the NCP region, coal combustion accounted for 66% (46-74%, 95% C.I.) of the EC, whereas, in the YRD and PRD regions, liquid fossil fuel combustion (e.g., traffic) stood for 46% (18-66%) and 58% (38-68%), respectively. Taken together, these findings suggest the need for a regionally-specific description of BC sources in climate models and regionally-tailored mitigation to combat severe air pollution events in East Asia.