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首页> 外文期刊>Atmospheric chemistry and physics >Relating aerosol absorption due to soot, organic carbon, and dust to emission sources determined from in-situ chemical measurements
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Relating aerosol absorption due to soot, organic carbon, and dust to emission sources determined from in-situ chemical measurements

机译：由于烟灰，有机碳和灰尘引起的气溶胶吸收与原位化学测量确定的发射源引起的

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摘要

Estimating the aerosol contribution to the global or regional radiative forcing can take advantage of the relationship between the spectral aerosol optical properties and the size and chemical composition of aerosol. Long term global optical measurements from observational networks or satellites can be used in such studies. Using in-situ chemical mixing state measurements can help us to constrain the limitations of such estimates. In this study, the Absorption ?ngstr?m Exponent (AAE) and the Scattering ?ngstr?m Exponent (SAE) derived from 10 operational AERONET sites in California are combined for deducing chemical speciation based on wavelength dependence of the optical properties. In addition, in-situ optical properties and single particle chemical composition measured during three aircraft field campaigns in California between 2010 and 2011 are combined in order to validate the methodology used for the estimates of aerosol chemistry using spectral optical properties. Results from this study indicate a dominance of mixed types in the classification leading to an underestimation of the primary sources, however secondary sources are better classified. The distinction between carbonaceous aerosols from fossil fuel and biomass burning origins is not clear, since their optical properties are similar. On the other hand, knowledge of the aerosol sources in California from chemical studies help to identify other misclassification such as the dust contribution.
机译：估计对全球或区域辐射强制的气溶胶贡献可以利用气溶胶光学性质和气溶胶尺寸和化学成分之间的关​​系。可以在这些研究中使用来自观察网络或卫星的长期全局光学测量。使用原位化学混合状态测量可以帮助我们限制这种估计的局限性。在该研究中，吸收αngstrαm指数（aae）和散射αngstrαm指数（Sae）衍生自加州10个运营机会部位的参数（SAE）基于光学性质的波长依赖性来推导化学品质。此外，在2010年和2011年间加利福尼亚州的三个飞机场运动中测量的原位光学性质和单颗粒化学组成是为了验证使用光谱光学性质的气溶胶化学估计的方法。本研究的结果表明分类中混合类型的优势导致低估主要来源，但是次要来源更好地分类。来自化石燃料和生物质燃烧起源的碳质气溶胶之间的区别尚不清楚，因为它们的光学性质是相似的。另一方面，从化学研究中获取加利福尼亚州的气溶胶源有助于识别其他错误归化，例如粉尘贡献。

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  • 来源
    《Atmospheric chemistry and physics》 |2013年第18期|共14页
  • 作者

    Cazorla A.; Bahadur R.; Suski K.J.; Cahill J.F.; Chand D.; Schmid B.; Ramanathan V.; Prather K.A.;

  • 作者单位

    Department of Chemistry and Biochemistry University of California San Diego San Diego CA United States;

    Scripps Institution of Oceanography University of California San Diego San Diego CA United States;

    Department of Chemistry and Biochemistry University of California San Diego San Diego CA United States;

    Department of Chemistry and Biochemistry University of California San Diego San Diego CA United States;

    Atmospheric Science and Global Change Division Pacific Northwest National Laboratory Richland WA United States;

    Atmospheric Science and Global Change Division Pacific Northwest National Laboratory Richland WA United States;

    Scripps Institution of Oceanography University of California San Diego San Diego CA United States;

    Department of Chemistry and Biochemistry University of California San Diego San Diego CA United States;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 大气科学（气象学）;
  • 关键词

    Relating aerosol; absorption due; soot;

    机译：与气溶胶相关;吸收到期;烟灰;

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