气候变化领域集成服务门户(CCPortal): Temporal evolution of submicron particles during extreme fireworks

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DOI	10.1007/s10661-019-7735-2
	Temporal evolution of submicron particles during extreme fireworks
	Yadav S.K.; Kumar M.; Sharma Y.; Shukla P.; Singh R.S.; Banerjee T.
发表日期	2019
ISSN	1676369
卷号	191 期号:9
英文摘要	Evolution of submicron particles in terms of particle number concentration and mobility-equivalent diameter was measured during Diwali festival–specific intensive pyrotechnic displays in Varanasi over central Indo-Gangetic Plain (IGP). A scanning mobility particle sizer coupled with an optical particle sizer was used to fit in an overlapping size range, and particle number concentration was analyzed to have an insight into the new particle formation and subsequent evolution of particles from nucleation to accumulation mode. Further, variation in black carbon (BC) concentration and aerosol ionic composition was measured simultaneously. Frequent fluctuation in particle number concentration in and around Diwali festival was evidenced, primarily influenced by local emission sources and meteorology, with three distinct peaks in number concentrations (dN/dlogDp, 3.1–4.5 × 104 cm3) coinciding well with peak firework emission period (18:00–23:00 h). Submicron particle size distribution revealed a single peak covering a size range of 80–130 nm, and for all instances, number concentration maximum coincided with geometric mean minimum, indicating the emission primarily in the ultrafine range (< 0.1 μm). Interestingly, during peak firework emissions, besides rise in accumulation mode, an event of new particle formation was identified with increase in nucleation and small Aitken mode, before being dispersed to background aerosols. On an integral scale, a clear distinction was noted between a normal and an episodic event, with a definite shift in the formation of ultrafine particles compared with the accumulation mode. The BC diurnal profile was typical, with a prominent nocturnal peak (12.0 ± 3.9 μg m-3) corresponding to a decrease in the boundary layer height. A slight variation in maximum BC concentration (16.8 μg m-3) was noted in the night of the event coinciding well with firework emissions. An increase in some specific ionic species was also noted in combination with an increase in the overall cation to anion ratio, which was explained in terms of heterogeneous transformation of NOx and catalytic conversion of SO2. [Figure not available: see fulltext.]., Springer Nature Switzerland AG.
英文关键词	Diwali; Fireworks; Nucleation; Particle evolution; Ultrafine particles
scopus关键词	Aerosols; Boundary layer flow; Boundary layers; Nucleation; Particle size; Particle size analysis; Boundary layer heights; Diwali; Fireworks; Mobility equivalent diameter; New particle formation; Particle number concentration; Scanning mobility particle sizer; Ultrafine particle; Explosives; black carbon; explosive; firework; nitric oxide; sulfur dioxide; unclassified drug; air quality; anthropogenic source; atmospheric pollution; black carbon; carbon emission; nucleation; particulate matter; temporal variation; aerosol; Article; catalysis; concentration (parameter); controlled study; geometry; India; measurement; particle size; periodicity; submicron particle; temporal analysis; aerosol; air pollutant; environmental monitoring; leisure; particulate matter; soot; time factor; Gangetic Plain; India; Uttar Pradesh; Varanasi; Aerosols; Air Pollutants; Environmental Monitoring; Explosive Agents; Holidays; India; Particle Size; Particulate Matter; Soot; Time Factors
来源期刊	Environmental Monitoring and Assessment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176354
作者单位	Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi, India; Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, 221005, India; Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi, India; DST-Mahamana Centre of Excellence in Climate Change Research, Banaras Hindu University, Varanasi, India
推荐引用方式 GB/T 7714	Yadav S.K.,Kumar M.,Sharma Y.,et al. Temporal evolution of submicron particles during extreme fireworks[J],2019,191(9).
APA	Yadav S.K.,Kumar M.,Sharma Y.,Shukla P.,Singh R.S.,&Banerjee T..(2019).Temporal evolution of submicron particles during extreme fireworks.Environmental Monitoring and Assessment,191(9).
MLA	Yadav S.K.,et al."Temporal evolution of submicron particles during extreme fireworks".Environmental Monitoring and Assessment 191.9(2019).