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首页> 外文期刊>Environmental Science & Technology >Characterizing the Aging of Biomass Burning Organic Aerosol by Use of Mixing Ratios: A Meta-analysis of Four Regions
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Characterizing the Aging of Biomass Burning Organic Aerosol by Use of Mixing Ratios: A Meta-analysis of Four Regions

机译：利用混合比表征生物质燃烧有机气溶胶的老化：四个区域的荟萃分析

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摘要

Characteristic organic aerosol (OA) emission ratios (ERs) and normalized excess mixing ratios (NEMRs) for biomass burning (BB) events have been calculated from ambient measurements recorded during four field campaigns. Normalized OA mass concentrations measured using Aerodyne Research Inc. quadrupole aerosol mass spectrometers (Q-AMS) reveal a systematic variation in average values between different geographical regions. For each region, a consistent, characteristic ratio is seemingly established when measurements are collated from plumes of all ages and origins. However, there is evidence of strong regional and local-scale variability between separate measurement periods throughout the tropical, subtropical, and boreal environments studied. ERs close to source typically exceed NEMRs in the far-field, despite apparent compositional change and increasing oxidation with age. The absence of any significant downwind mass enhancement suggests no regional net source of secondary organic aerosol (SOA) from atmospheric aging of BB sources, in contrast with the substantial levels of net SOA formation associated with urban sources. A consistent trend of moderately reduced ΔOA/ΔCO ratios with aging indicates a small net loss of OA, likely as a result of the evaporation of organic material from initial fire emissions. Variability in ERs close to source is shown to substantially exceed the magnitude of any changes between fresh and aged OA, emphasizing the importance of fuel and combustion conditions in determining OA loadings from biomass burning.
机译：已经根据四次野战期间记录的环境测量值计算了生物质燃烧（BB）事件的特征性有机气溶胶（OA）排放比（ER）和归一化过量混合比（NEMR）。使用Aerodyne Research Inc.四极杆气溶胶质谱仪（Q-AMS）测量的归一化OA质量浓度显示出不同地理区域之间平均值的系统变化。当从所有年龄和起源的羽流中整理测量结果时，似乎为每个区域建立了一致的特征比率。但是，有证据表明，在所研究的热带，亚热带和北冰洋环境中，不同的测量时段之间存在强烈的区域和局部尺度差异。尽管随着年龄的增长，成分明显变化和氧化增加，但靠近源头的ER在远场通常超过NEMR。没有明显的顺风向质量增加，这表明BB源的大气老化没有区域性的次生有机气溶胶（SOA）净源，而与城市源相关的净SOA形成水平却很高。随着时间的推移，ΔOA/ΔCO比值会适度降低的趋势始终一致，这表明OA的净损失很小，这很可能是由于初始火灾中有机物质的蒸发所致。结果表明，接近源的ER的变化量大大超过了新鲜和老化OA之间任何变化的幅度，强调了燃料和燃烧条件在确定生物质燃烧产生的OA负荷中的重要性。

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  • 来源
    《Environmental Science & Technology》 |2012年第24期|13093-13102|共10页
  • 作者

    Matthew D. Jolleys; Hugh Coe; Gordon McFiggans; Gerard Capes; James D. Allan; Jonathan Crosier; Paul I. Williams; Grant Allen; Keith N. Bower; Jose L. Jimenez; Lynn M. Russell; Michel Grutter; Darrel Baumgardner;

  • 作者单位

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom,National Centre for Atmospheric Science, University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom,National Centre for Atmospheric Science, University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom,National Centre for Atmospheric Science, University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom;

    Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, and University of Manchester, Manchester, United Kingdom;

    Cooperative Institute of Research in the Environmental Sciences and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado, United States;

    Scripps Institution of Oceanography, University of California San Diego, La jolla, California, United States;

    Centro de Ciencias de la Atmosfera, Universidad National Autonoma de Mexico, Mexico City, Mexico;

    Centro de Ciencias de la Atmosfera, Universidad National Autonoma de Mexico, Mexico City, Mexico;

  • 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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