气候变化领域集成服务门户(CCPortal): 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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DOI	10.1016/j.atmosres.2019.04.028
	Estimates of reactive trace gases (NMVOCs; CO and NOx) and their ozone forming potentials during forest fire over Southern Himalayan region
	Kumar A.; Bali K.; Singh S.; Naja M.; Mishra A.K.
发表日期	2019
ISSN	0169-8095
起始页码	41
结束页码	51
卷号	227
英文摘要	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/m2/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/m2/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 ~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 O3 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 O3 formation and effective control strategies of O3 pollution during the forest fire events over the lower Himalayan region. © 2019 Elsevier B.V.
英文关键词	Biomass burning; Himalayas; NMVOC; Ozone formation potential; Trace gases
语种	英语
scopus关键词	Carbon monoxide; Deforestation; Fire hazards; Gases; Nitrogen oxides; Ozone; Particulate emissions; Pollution control; Volatile organic compounds; Biomass-burning; Himalayas; NMVOC; Ozone formation potentials; Trace-gases; Fires; atmospheric pollution; biomass burning; carbon emission; carbon monoxide; concentration (composition); forest fire; nitrogen oxides; ozone; photochemistry; trace gas; volatile organic compound; Himalayas
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162124
作者单位	Environmental Science and Biomedical Metrology Division, CSIR-National Physical Laboratory, Dr KS Krishnan Road, New Delhi, 110012, India; School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India; Centre for Atmospheric Sciences, Indian Institute of Technology, New Delhi, 110016, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi, 110012, India; Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, 263002, India
推荐引用方式 GB/T 7714	Kumar A.,Bali K.,Singh S.,et al. Estimates of reactive trace gases (NMVOCs; CO and NOx) and their ozone forming potentials during forest fire over Southern Himalayan region[J],2019,227.
APA	Kumar A.,Bali K.,Singh S.,Naja M.,&Mishra A.K..(2019).Estimates of reactive trace gases (NMVOCs; CO and NOx) and their ozone forming potentials during forest fire over Southern Himalayan region.Atmospheric Research,227.
MLA	Kumar A.,et al."Estimates of reactive trace gases (NMVOCs; CO and NOx) and their ozone forming potentials during forest fire over Southern Himalayan region".Atmospheric Research 227(2019).