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首页> 外文期刊>Atmospheric environment >The influence of Asian dust outflow on particle microphysical and optical properties at Mt. Tai in central east China
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The influence of Asian dust outflow on particle microphysical and optical properties at Mt. Tai in central east China

机译：亚洲粉尘的流出对Mt颗粒微物理和光学性质的影响。华东地区的Tai

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摘要

An in-situ measurement of the particle number size distribution and optical properties (scattering and absorption coefficients) of PM2.5 was conducted at Mt. Tai, a mountain top station in central east China in the spring of 2011. It was found that the particle size distribution, mass concentration, as well as the optical properties have been modified during the dust periods. The mean mass concentration of PM2.5 during the dust periods was nearly twice of that during the non-dust period. The number and volume size distribution showed a higher concentration in the size range of 0.5-2.5 mu m during the dust period, which were identified as dust particles. The absorption coefficient increased by -40%, while the scattering coefficient did not show much difference. The single scattering albedo of 0.85 during dust period was also comparable with the value of 0.89 during non-dust period. The Mie model was applied to simulate the aerosol optical properties and validated through a closure study for an intensive dust event. This study quantitatively demonstrated that dust particles contributed to nearly 63% of the scattering coefficient, while the remainder was mainly due to anthropogenic particles on dust days. The dust particles took a lower portion to the absorption, about 40%, indicating the anthropogenic particles still played a more dominant role in absorbing. This study also indicated that although there were only a few tens of dust particles during dust period, they could influence in particle optical properties significantly. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在Mt现场测量PM2.5的粒径分布和光学特性（散射系数和吸收系数）。 Tai，2011年春，位于华东中部的山顶站。发现在尘埃期，粒径分布，质量浓度以及光学性质均发生了变化。尘埃期PM2.5的平均质量浓度几乎是非尘埃期PM2.5的两倍。尘埃期间，数量和体积尺寸分布在0.5-2.5μm的尺寸范围内显示较高的浓度，其被确定为尘埃颗粒。吸收系数增加了-40％，而散射系数差异不大。尘埃期的单次散射反照率为0.85，与非尘埃期的0.89也相当。 Mie模型用于模拟气溶胶的光学特性，并通过针对大量尘埃事件的封闭研究进行了验证。这项研究定量地表明，尘埃颗粒占散射系数的近63％，而其余主要是由于尘埃日的人为颗粒造成的。灰尘颗粒占吸收的比重较低，约为40％，这表明人为颗粒在吸收中仍起主要作用。这项研究还表明，尽管在尘埃期只有几十个尘埃颗粒，但它们会显着影响颗粒的光学性能。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Atmospheric environment》 |2016年第10期|27-38|共12页
  • 作者

    Shen X. J.; Sun J. Y.; Zhang Y. M.; Zhang X. Y.; Wang T. T.; Wang Y. Q.; Zhang L.; Fan R. X.; Zhao Y.; Wang D. Z.;

  • 作者单位

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China|Chinese Acad Sci, State Key Lab Cryosphere Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China|Heilongjiang Meteorol Adm, Harbin 157000, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China|Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China;

    Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China|Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China;

    Taishan Natl Basic Meteorol Observat Stn, Tai An 271000, Shandong, Peoples R China;

    Taishan Natl Basic Meteorol Observat Stn, Tai An 271000, Shandong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Dust aerosol; Size distribution; Scattering and absorption; Mie model;

    机译：粉尘气溶胶;粒径分布;散射与吸收;米氏模型​​;

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