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首页> 外文期刊>Atmospheric environment >Comparation of aerosol optical properties and associated radiative effects of air pollution events between summer and winter: A case study in January and July 2014 over Wuhan, Central China
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Comparation of aerosol optical properties and associated radiative effects of air pollution events between summer and winter: A case study in January and July 2014 over Wuhan, Central China

机译：夏季和冬季之间气溶胶光学特性和空气污染事件的相关辐射效应的比较：以2014年1月和2014年7月中部武汉为例

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摘要

Differences in aerosol optical properties and associated radiative effects at ultraviolet (UV), visible (VIS), near-infrared (NIR), and shortwave (SW) spectra during haze periods between winter and summer of 2014 in Wuhan were compared in this study. With the development of haze, the average aerosol optical depth increased from 0.371 to 0.769 in winter and from 0.602 to 1.163 in summer. A positive correlation was found between absorbing aerosol optical depth and black carbon, only in winter. The mean fine mode effective radius of aerosols increased from 0.128 mu m to 0.166 mu m in winter and from 0.179 mu m to 0.229 mu m in summer, due to hygroscopic growth under high humidity conditions during haze periods. The fine mode particles were more dominant in summer than in winter. The single scattering albedo (SSA) increased significantly in both seasons as a result of the emergence of numerous non-absorbent aerosols when haze occurred. The aerosol radiative effect (ARE) increased from -73.46 W/m(2) to -115.38 W/m(2) (-96.01 W/m(2) to -135.67 W/m(2)) at the earth's surface, and from -15.09 W/m(2) to -32.91 W/m(2) (-20.49 W/m(2) to -49.13 W/m(2)) at the top of the atmosphere because of the change from clear air conditions to haze periods in winter (summer). Unusual increases in aerosol radiative effect efficiency (AREE) from -40.78 W/m(2) to -43.57 W/m(2) and AREE fraction of UV in SW spectrum from 1.9% to 3.3% were found at the top of atmosphere in winter. This exception was probably due to dust aerosols with iron components, which had a strong UV absorption ability. The AREE dependence showed a high dependence on particle size in winter but a greater dependence on the SSA in summer. Back trajectory analysis with active fire areas from Moderate Resolution Imaging Spectroradiometer indicated that the black carbon originated from the North in summer, while active fires in winter were rare.
机译：本研究比较了武汉市2014年冬季和夏季雾霾期间气溶胶光学特性以及相关的紫外线（UV），可见光（VIS），近红外（NIR）和短波（SW）光谱的差异。随着雾霾的发展，冬季平均气溶胶光学深度从0.371增至0.769，夏季从0.602增至1.163。仅在冬季，吸收气溶胶的光学深度和黑碳之间发现正相关。由于雾霾时期高湿度条件下的吸湿性增长，气溶胶的平均精细模式有效半径在冬季从0.128微米增加到0.166微米，在夏季从0.179微米增加到0.229微米。夏季，细模颗粒比冬季更占优势。由于发生雾霾时大量非吸收性气溶胶的出现，单个散射反照率（SSA）在两个季节均显着增加。在地球表面，气溶胶的辐射效应（ARE）从-73.46 W / m（2）增加到-115.38 W / m（2）（-96.01 W / m（2）到-135.67 W / m（2）），并且由于从清晰的变化而在大气层顶部从-15.09 W / m（2）到-32.91 W / m（2）（-20.49 W / m（2）到-49.13 W / m（2））冬季（夏季）阴霾天气。大气顶部的气溶胶辐射效应效率（AREE）从-40.78 W / m（2）异常增加到-43.57 W / m（2），SW光谱中的UV的AREE比例从1.9％增加到3.3％。冬季。该异常可能是由于具有铁成分的粉尘气溶胶具有很强的紫外线吸收能力。在冬季，AREE依赖性显示出对颗粒大小的高度依赖性，而在夏季，对AREE的依赖性更大。使用中等分辨率成像光谱仪对活动火区进行的反向轨迹分析表明，黑碳在夏季起源于北部，而在冬季则很少发生活动。

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  • 来源
    《Atmospheric environment》 |2019年第12期|117004.1-117004.12|共12页
  • 作者

    Jin Shikuan; Ma Yingying; Zhang Ming; Gong Wei; Lei Lianfa; Ma Xin;

  • 作者单位

    Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China|Collaborat Innovat Ctr Geospatial Technol Wuhan 430079 Hubei Peoples R China;

    China Univ Geosci Sch Geog & Informat Engn Hubei Key Lab Crit Zone Evolut Wuhan 430074 Hubei Peoples R China;

    Xian Elect Engn Res Inst Xian 710100 Shaanxi Peoples R China|North Sky Dome Informat Technol Xian CO LTD Xian 710100 Shaanxi Peoples R China;

    Wuhan Univ Elect Informat Sch Wuhan 430072 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aerosols; Radiative effect; Haze; Cimel sun-sky radiometer; libRadtran; Shortwave;

    机译：气溶胶;辐射效应;阴霾;西梅尔太阳辐射计;libRadtran;短波;

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