...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >HONO Emissions from Western U.S. Wildfires Provide Dominant Radical Source in Fresh Wildfire Smoke
【24h】

HONO Emissions from Western U.S. Wildfires Provide Dominant Radical Source in Fresh Wildfire Smoke

机译：来自西方美国野火的荣誉排放提供新鲜野火烟雾的主导自由基来源

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Wildfires are an important source of nitrous acid (HONO), a photolabile radical precursor, yet in situ measurements and quantification of primary HONO emissions from open wildfires have been scarce. We present airborne observations of HONO within wildfire plumes sampled during the Western Wildfire Experiment for Cloud chemistry, Aerosol absorption and Nitrogen (WE-CAN) campaign. ΔHONO/ΔCO close to the fire locations ranged from 0.7 to 17 pptv ppbv~(-1) using a maximum enhancement method, with the median similar to previous observations of temperate forest fire plumes. Measured HONO to NO_x enhancement ratios were generally factors of 2, or higher, at early plume ages than previous studies. Enhancement ratios scale with modified combustion efficiency and certain nitrogenous trace gases, which may be useful to estimate HONO release when HONO observations are lacking or plumes have photochemical exposures exceeding an hour as emitted HONO is rapidly photolyzed. We find that HONO photolysis is the dominant contributor to hydrogen oxide radicals (HO_x = OH + HO_2) in early stage (＜3 h) wildfire plume evolution. These results highlight the role of HONO as a major component of reactive nitrogen emissions from wildfires and the main driver of initial photochemical oxidation.
机译：野火是亚硝酸（Hono）的重要来源，光图自由基前体，然而，原位测量和初级隆起排放量的开放野火的定量已经稀缺。我们在Western Wildfire在云化学，气溶胶吸收和氮气（We-Can）竞选期间在Western Wildfire试验期间呈现出野火羽毛中的空气传播观察。 ΔHono/ΔCo靠近火灾位置的使用率为0.7至17 pptv ppbv〜（-1），使用最大增强方法，中值类似于先前的温带森林火灾羽毛的观察。在早期羽流年龄而不是先前研究，测量的Hono至No_X增强比率通常是2或更高的因素。增强率呈改性燃烧效率和某些含氮痕量气体，这可能是在缺乏隆起观察的情况下估计隆起释放时的燃烧释放，或者羽毛具有超过一个小时的光化学曝光，这是迅速的光解。我们发现，霍诺光解是早期氧化物自由基（HO_X = OH + HO_2）的主要贡献者（<3小时）野火羽流进化。这些结果突出了Hono作为野火反应氮排放的主要成分以及初始光化学氧化的主要驱动器的作用。

著录项

  • 来源
    《Environmental Science & Technology》 |2020年第10期|5954-5963|共10页
  • 作者

    Qiaoyun Peng; Brett B. Palm; Kara E. Melander; Ben H. Lee; Samuel R. Hall; Kirk Ullmann; Teresa Campos; Andrew J. Weinheimer; Eric C. Apel; Rebecca S. Hornbrook; Alan J. Hills; Denise D. Montzka; Frank Flocke; Lu Hu; Wade Permar; Catherine Wielgasz; Jakob Lindaas; Ilana B. Pollack; Emily V. Fischer; Timothy H. Bertram; Joel A. Thornton;

  • 作者单位

    Department of Atmospheric Sciences University of Washington Seattle Washington 9819$ United States;

    Department of Atmospheric Sciences University of Washington Seattle Washington 98195 United States;

    Department of Atmospheric Sciences University of Washington Seattle Washington 98195 United States;

    Department of Atmospheric Sciences University of Washington Seattle Washington 98195 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistty Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder Colorado 80301 United States;

    Department of Chemistry and Biochemistry University of Montana Missoula Montana 59812 United States;

    Department of Chemistry and Biochemistry University of Montana Missoula Montana 59812 United States;

    Department of Chemistry and Biochemistry University of Montana Missoula Montana 59812 United States;

    Department of Atmospheric Science Colorado State University Fort Collins Colorado 80523 United States;

    Department of Atmospheric Science Colorado State University Fort Collins Colorado 80S23 United States;

    Department of Atmospheric Science Colorado State University Fort Collins Colorado 80523 United States;

    Department of Chemistry University of Wisconsin Madison Wisconsin 53706 United States;

    Department of Atmospheric Sciences University of Washington Seattle Washington 98195 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号