Long-range and regional transported size-resolved atmospheric aerosols during summertime in urban Shanghai.
Long-range and regional transported size-resolved atmospheric aerosols during summertime in urban Shanghai.
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DOI：
10.1016/j.scitotenv.2017.01.073
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发表时间：
2017-04
期刊：
影响因子：
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通讯作者：
Xiaoxia Ding;Lingdong Kong;Chengtian Du;Assiya Zhanzakova;Lin Wang;Hongbo Fu;Jianmin Chen;Xin Yang
中科院分区：
文献类型：
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作者：
Xiaoxia Ding;Lingdong Kong;Chengtian Du;Assiya Zhanzakova;Lin Wang;Hongbo Fu;Jianmin Chen;Xin Yang
In this study, the concentrations of water soluble ions (WSI), organic carbon (OC), and elemental carbon (EC) of size-resolved (0.056–18 μm) atmospheric aerosols were measured in July and August 2015 in Shanghai, China. Backward trajectory model and potential source contribution function (PSCF) model were used to identify the potential source distributions of size-resolved particles and PM1.8-associated atmospheric inorganic and carbonaceous aerosols. The results showed that the average mass concentrations of PM0.1, PM1, and PM1.8were 21.21, 82.90, and 100.1 μg m− 3in July and 7.00, 29.21, and 35.10 μg m− 3in August, respectively, indicating that the particulate matter pollution was more serious in July than in August in this study due to the strong dependence of the aerosol species on the air mass origins. The trajectory cluster analysis revealed that the air masses originated from heavily industrialized areas including the Pearl River Delta (PRD) region, the Yangtze River Delta (YRD) region and the Beijing-Tianjin region were characterised with high OC and SO42 −loadings. The results of PSCF showed that the pollution in July was mainly influenced by long-range transport while it was mainly associated to local and intra-regional transport in August. Besides the contributions of anthropogenic sources from YRD and PRD region, ship emissions from the East China Sea also made a great contribution to the high loadings of PM1.8and PM1.8-associated NO3−, NH4+, and EC in July. SO42 −in Shanghai was dominantly ascribed to anthropogenic sources and the high PSCF values for PM1.8-associated SO42 −observed in August was mainly due to the ship emissions of Shanghai port, such as Wusong port and Yangshan deep-water port. These results indicated that the particulate pollutants from long-range transported air masses and shipping made a significant contribution to Shanghai's air pollution.
