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首页> 外文期刊>Environmental Science & Technology >Mixing State and Fractal Dimension of Soot Particles at a Remote Site in the Southeastern Tibetan Plateau
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Mixing State and Fractal Dimension of Soot Particles at a Remote Site in the Southeastern Tibetan Plateau

机译：青藏高原东南部偏远地区烟尘颗粒的混合状态和分形维数

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摘要

The mixing state and fractal dimension (D-f) of soot particles are two major factors affecting their absorption capacity and their climate effects. Here we investigated these factors of soot particles found in a typical valley of the southeastern Tibetan Plateau where wood burning in local villages was one major source of soot particles. Our motivation revealed D-f and the aging property of soot particles in remote air and discussed their regional climatic implications. We found that 64% of total analyzed particles by number were soot-bearing particles and most of them aged with sulfate or organic coating. The D-f sequence is bare-like soot (1.75 +/- 0.08) partly coated soot (1.82 +/- 0.05) embedded soot (1.88 +/- 0.05). The aging process enlarged the overall size of the soot-bearing particles and increased the compactness of soot. Soot aging critically depended on high relative humidity (RH) during nighttime. Besides emission sources and coating processes, the coating aerosol phase under different RHs is another important factor affecting the soot D-f.
机译：烟灰颗粒的混合状态和分形维数（D-f）是影响其吸收能力和气候影响的两个主要因素。在这里，我们调查了在青藏高原东南部典型山谷中发现的烟尘颗粒的这些因素，当地村庄的木材燃烧是烟尘颗粒的主要来源之一。我们的动机揭示了D-f和偏远空气中烟尘颗粒的老化特性，并讨论了其对区域气候的影响。我们发现，按数量分析的总颗粒中有64％是含烟尘颗粒，并且大多数颗粒都经过硫酸盐或有机涂层老化。 D-f序列为裸露的烟灰（1.75 +/- 0.08）<部分包覆的烟灰（1.82 +/- 0.05）<包埋的烟灰（1.88 +/- 0.05）。时效过程扩大了含烟颗粒的总体尺寸，并增加了粉尘的密实度。烟尘老化在夜间主要取决于较高的相对湿度（RH）。除了排放源和涂覆过程外，不同相对湿度下的涂覆气溶胶相是影响烟灰D-f的另一个重要因素。

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  • 来源
    《Environmental Science & Technology》 |2019年第14期|8227-8234|共8页
  • 作者

    Yuan Qi; Xu Jianzhong; Wang Yuanyuan; Zhang Xinghua; Pang Yuner; Liu Lei; Bi Lei; Kang Shichang; Li Weijun;

  • 作者单位

    Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Zhejiang, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;

    Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Zhejiang, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;

    Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Zhejiang, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China|CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;

    Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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