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首页> 外文期刊>Environmental Science & Technology >Emissions of Glyoxal and Other Carbonyl Compounds from Agricultural Biomass Burning Plumes Sampled by Aircraft
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Emissions of Glyoxal and Other Carbonyl Compounds from Agricultural Biomass Burning Plumes Sampled by Aircraft

机译：飞机采样的农业生物质燃烧羽状物中乙二醛和其他羰基化合物的排放

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摘要

We report enhancements of glyoxal and methylglyoxal relative to carbon monoxide and formaldehyde in agricultural biomass burning plumes intercepted by the NOAA WP-3D aircraft during the 2013 Southeast Nexus and 2015 Shale Oil and Natural Gas Nexus campaigns. Glyoxal and methylglyoxal were measured using broadband cavity enhanced spectroscopy, which for glyoxal provides a highly selective and sensitive measurement. While enhancement ratios of other species such as methane and formaldehyde were consistent with previous measurements, glyoxal enhancements relative to carbon monoxide averaged 0.0016 ± 0.0009, a factor of 4 lower than values used in global models. Glyoxal enhancements relative to formaldehyde were 30 times lower than previously reported, averaging 0.038 ± 0.02. Several glyoxal loss processes such as photolysis, reactions with hydroxyl radicals, and aerosol uptake were found to be insufficient to explain the lower measured values of glyoxal relative to other biomass burning trace gases, indicating that glyoxal emissions from agricultural biomass burning may be significantly overestimated. Methylglyoxal enhancements were three to six times higher than reported in other recent studies, but spectral interferences from other substituted dicarbyonyls introduce an estimated correction factor of 2 and at least a 25% uncertainty, such that accurate measurements of the enhancements are difficult.
机译：我们报告说，在2013年东南联盟和2015年页岩油与天然气联盟活动期间，NOAA WP-3D飞机截获的农业生物质燃烧羽流中乙二醛和甲基乙二醛相对于一氧化碳和甲醛的增强。使用宽带腔增强光谱法测量乙二醛和甲基乙二醛，这为乙二醛提供了高度选择性和灵敏的测量。尽管其他物种（如甲烷和甲醛）的增强率与先前的测量结果一致，但乙二醛相对于一氧化碳的增强平均为0.0016±0.0009，比全局模型中使用的值低4倍。乙醛相对于甲醛的增强作用比以前报道的低30倍，平均为0.038±0.02。发现一些乙二醛损失过程（例如光解，与羟基自由基的反应和气溶胶吸收）不足以解释乙二醛相对于其他燃烧生物质的痕量气体而言较低的测量值，表明农业生物质燃烧产生的乙二醛排放量可能被大大高估。甲基乙二醛的增强作用是最近其他研究报告的三至六倍，但是其他取代的二碳yon基的光谱干扰引入了估计的校正因子2和至少25％的不确定性，因此很难准确测量增强作用。

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  • 来源
    《Environmental Science & Technology》 |2017年第20期|11761-11770|共10页
  • 作者

    Zarzana Kyle J.; Min K. E.; Washenfelder Rebecca A.; Kaiser Jennifer B.; Krawiec-Thayer Mitchell; Peischl Jeff; Neuman Jonathan Andrew; Nowak John B.; Wagner Nick L.; Dubé William P.; Clair Jason M.St; Wolfe Glenn M.; Hanisco Thomas F.; Keutsch Frank N.; Ryerson Thomas B.; Brown Steven S.;

  • 作者单位

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Department of Chemistry, University of Wisconsin-Madison, Madison, WI, United States;

    Department of Chemistry, University of Wisconsin-Madison, Madison, WI, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States;

    Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States,Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, United States;

    Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States,Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, United States;

    Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States;

    Department of Chemistry, University of Wisconsin-Madison, Madison, WI, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States;

    Chemical Sciences Division, NOAA Earth System Research Laboratory (ESRL), Boulder, CO, United States,Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO, United States;

  • 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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