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首页> 外文期刊>Atmospheric research >Fine carbonaceous aerosol characteristics at a megacity during the Chinese Spring Festival as given by OC/EC online measurements
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Fine carbonaceous aerosol characteristics at a megacity during the Chinese Spring Festival as given by OC/EC online measurements

机译：OC / EC在线测量得出的中国春节期间特大城市的精细碳质气溶胶特征

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摘要

The OC/EC online monitoring campaign was carried out in Tianjin of China from 8th February to 15th March 2015 during the Chinese Spring Festival period (CSFP). The concentrations of OC, EC, BC and other ambient pollutants (e.g. SO2, NO2 and PM2.5, etc.) in high time resolution were measured with related online-monitoring instruments. During the CSFP, according to the peaks of PM2.5 concentrations and number concentrations (NC) of aerosol particles with aerodynamic diameters between 0.3 and 2.5 mu m, five pollution-events were generally identified and displayed. These pollution-events were closely associated with large-scale fireworks displaying, combustion activities such as heating for winter, and the stable meteorological conditions, etc. During the CSFP, EC and OC concentrations showed variations up to one order of magnitude. The uncertainty of instrument itself and the difference for measured methods, further caused the differences between thermal OC (measured OC by thermal method) and optical OC (measured OC by optical method) concentrations, as well as between thermal EC (measured EC by thermal method) and optical EC (measured EC by optical method) concentrations. The high concentration carbonaceous aerosols could enlarge the uncertainty of measuring instrument, reducing the correlations between OC and EC, and enhance the differences among thermal EC, optical BC and optical EC. The OC/EC ratios and the percentages of SOC/OC would be declined, when the pollution-events formed during the CSFP. Due to the different sources for thermal POC and thermal SOC, the correlation of the two was relatively lower (R-2 = 0.39). Thermal POC dominated over thermal OC during the CSFP. (C) 2016 Elsevier B.V. All rights reserved.
机译：OC / EC在线监视活动于2015年2月8日至3月15日在中国春节期间在中国天津进行。使用相关的在线监测仪器测量了高时间分辨率中的OC，EC，BC和其他环境污染物（例如SO2，NO2和PM2.5等）的浓度。在CSFP期间，根据空气动力学直径在0.3到2.5微米之间的PM2.5浓度峰值和气溶胶颗粒的数量浓度（NC）峰值，通常识别并显示了五个污染事件。这些污染事件与大型烟火表演，冬季取暖等燃烧活动以及稳定的气象条件等密切相关。在CSFP期间，EC和OC的浓度变化高达一个数量级。仪器本身的不确定性以及测量方法的差异，进一步导致了热OC（通过热方法测量的OC）和光学OC（通过光学方法测量的OC）浓度之间以及热EC（通过热方法测量的EC）之间的差异。 ）和光学EC（通过光学方法测量的EC）浓度。高浓度碳质气溶胶会增加测量仪器的不确定性，降低OC和EC之间的相关性，并增加热EC，光学BC和光学EC之间的差异。当在CSFP期间形成污染事件时，OC / EC比率和SOC / OC百分比将下降。由于热POC和热SOC的来源不同，两者的相关性相对较低（R-2 = 0.39）。在CSFP期间，热POC优于热OC。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Atmospheric research》 |2016年第11期|20-28|共9页
  • 作者

    Liu Baoshuang; Bi Xiaohui; Feng Yinchang; Dai Qili; Xiao Zhimei; Li Liwei; Wu Jianhui; Yuan Jie; Zhang YuFen;

  • 作者单位

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

    Tianjin Environm Monitoring Ctr, Tianjin 300191, Peoples R China;

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

    Tianjin Environm Monitoring Ctr, Tianjin 300191, Peoples R China;

    Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Ambient Air, Tianjin 300071, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Carbonaceous aerosol; Organic carbon; Elemental carbon; OC/EC ratio;

    机译：碳质气溶胶;有机碳;元素碳;OC / EC比;

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