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首页> 外文期刊>Atmospheric research >Estimates of reactive trace gases (NMVOCs, CO and NOx) and their ozone forming potentials during forest fire over Southern Himalayan region
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Estimates of reactive trace gases (NMVOCs, CO and NOx) and their ozone forming potentials during forest fire over Southern Himalayan region

机译：在喜马拉雅南部南部的森林火灾中，反应性痕量气体（NMVOCs，CO和NOx）及其臭氧成型潜力的估计

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摘要

In the present study, emission of trace gases [non-methane volatile organic compounds (NMVOCs), carbon monoxide (CO) and oxides of nitrogen (NOx)], their ozone forming potentials and ozone sensitivities have been investigated during the forest fire period (2003-2016) over the Southern Himalayan region. Reanalysis data of Global Fire Assimilation System model is used to retrieve the various parameters such as fire radiative power and emission rates of various trace gases. April 2016 is noticed to be anomalous in terms of fire events in the last fourteen years (2003-2016) over the lower Southern Himalayan region. Our estimation shows major contribution of oxygenated compounds (55.2%) amidst all NMVOCs. Mean CO and NOx emission rates are 533.81 and 13.66 mg/m(2)/day, respectively during the forest fire of April months for fourteen years. The emissions of NMVOCs, CO and NOx increased by 90.4, 110.6 and 132.5% and reaches up to 121.1, 958.3 and 25.3 mg/m(2)/day in April 2016 with respect to non-burning period (April 2015). Ozone forming potentials (OFP) of NMVOCs are also examined using the maximum incremental reactivity (MIR) method, which shows similar to 2 times higher OFP for total NMVOCs during 2016 as compared to 2015. Based on the MIR scale, the contribution of top 10 species to OFP are in the decreasing order of formaldehyde, acetaldehyde, ethane, propene, toluene, butane, isoprene, methanol, pentene and hexane. The ratio of NMVOCs/NOx is 8, which indicates that the photochemical production of O-3 is mainly controlled by the levels of NMVOCs. The surface observations of ozone and CO from a Himalayan station Nainital also showed substantial increase in concentration during the forest fire of April 2016. Our results are valuable for the better understanding of chemical composition of trace gases, their role in O-3 formation and effective control strategies of O-3 pollution during the forest fire events over the lower Himalayan region.
机译：在本研究中，痕量气体的排放[非甲烷挥发性有机化合物（NMVOC），氮气（NOx）的氧化物（NOx）]，它们在森林火灾期间研究了它们的臭氧形成电位和臭氧敏感性（ 2003-2016）在喜马拉雅南部地区。全球防火系统模型的再分析数据用于检索各种参数，例如防火电力和各种痕量气体的排放率。 2016年4月，在最近十四岁（2003 - 2016年）在喜马拉雅地区的下南部地区的火灾事件方面被注意到。我们的估计显示含氧化合物（55.2％）在所有NMVOC中的主要贡献。平均CO和NOx排放率分别为533.81和13.66 mg / m（2）/天，分别在4月份的森林火灾期间为4月十四年。 NMVOCs，CO和NOx的排放量增加了90.4,110.6％和132.5％，达到2016年4月的不燃烧期（2015年4月）达到2016年4月高达121.1,958.3和25.3mg / m（2）/天。使用最大增量反应性（MIR）方法检查NMVOCs的臭氧形成电位（OFP），其与2016年，与2015年相比显示出类似于2016年全年NMVOC的2倍。基于MIR规模，前10名贡献对OFP的物种处于甲醛，乙醛，乙烷，丙烯，甲苯，丁烷，异戊二烯，甲醇，戊烯和己烷的下降顺序。 NMVOCs / NOx的比例为<8，表明O-3的光化学产生主要由NMVOC的水平控制。来自喜马拉雅站的臭氧和CO的表面观察纳此力也表现出2016年4月森林火灾期间集中浓度的大幅增加。我们的结果对于更好地了解痕量气体的化学成分，它们在O-3形成和有效的作用有价值森林森林地区森林火灾活动中O-3污染的控制策略。

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  • 来源
    《Atmospheric research》 |2019年第10期|41-51|共11页
  • 作者

    Kumar Amit; Bali Kunal; Singh Sachchidanand; Naja Manish; Mishra Amit Kumar;

  • 作者单位

    CSIR Natl Phys Lab Environm Sci & Biomed Metrol Div Dr KS Krishnan Rd New Delhi 110012 India|Jawaharlal Nehru Univ Sch Environm Sci New Delhi 110067 India;

    CSIR Natl Phys Lab Environm Sci & Biomed Metrol Div Dr KS Krishnan Rd New Delhi 110012 India|Indian Inst Technol Ctr Atmospher Sci New Delhi 110016 India;

    CSIR Natl Phys Lab Environm Sci & Biomed Metrol Div Dr KS Krishnan Rd New Delhi 110012 India|Acad Sci & Innovat Res AcSIR CSIR Natl Phys Lab Campus New Delhi 110012 India;

    Aryabhatta Res Inst Observat Sci ARIES Naini Tal 263002 India;

    CSIR Natl Phys Lab Environm Sci & Biomed Metrol Div Dr KS Krishnan Rd New Delhi 110012 India|Jawaharlal Nehru Univ Sch Environm Sci New Delhi 110067 India;

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  • 正文语种 eng
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  • 关键词

    Biomass burning; Trace gases; NMVOC; Ozone formation potential; Himalayas;

    机译：生物质燃烧;痕量气体;nmvoc;臭氧形成潜力;喜马拉雅山;

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