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DOI	10.1016/j.atmosenv.2020.117829
	Transport of aerosols and trace gases during dust and crop-residue burning events in Indo-Gangetic Plain: Influence on surface ozone levels over downwind region
	Kumari S.; Lakhani A.; Kumari K.M.
发表日期	2020
ISSN	1352-2310
卷号	241
英文摘要	The present study addresses the influence of long-range transport from dust storm (event 1) and crop-residue burning (event 2) sources over Indo-Gangetic Plain (IGP) using ground-based measurements and satellite observations. In the present study, the spatial distribution and temporal variation of ambient particulate matter (PM) were assessed at 15 air quality monitoring stations situated in Rajasthan, north-western-Indo-Gangetic Plain (NW-IGP) and downwind region. During the dust event, the daily average mass concentrations of PM2.5 and PM10 were 1.2–3.3 and 2.2–4.6 times higher than the National Ambient Air Quality Standards (NAAQS 60 μg/m3 for PM2.5 and 100 μg/m3 for PM10) across stations in the vicinity of the Thar Desert. Stations in NW-IGP showed enhancement in PM2.5 and PM10 during crop-residue burning period. Agra being a downwind site was influenced by both the events and enhancement in PM levels was observed, however ozone (O3) showed different variations during event 1 and 2. During the dust event, 6.1% reduction in the mean O3 level compared to the study period was found while a significant enhancement (15.1%) during event 2 was observed at Agra. To determine the possible reasons for different O3 trends, the variation of O3 precursors carbon monoxide (CO) and nitrogen oxides (NOx) along with the meteorological parameters was also assessed. CO and NOx levels during event 1 were reduced similar to O3 whereas during event 2 an enhancement in CO and NOx levels was observed. Satellite observations and backward air-mass trajectories suggested transport of aerosols from Thar Desert resulted in reduced O3 levels during dust event while transport of O3 precursors enhanced photochemical production of O3 during crop-residue burning period at Agra. © 2020 Elsevier Ltd
关键词	Crop-residue burning Dust storm Heterogeneous reactions Ozone Particulate matter Spatiotemporal variation
语种	英语
scopus关键词	Aerosols; Agricultural wastes; Air quality; Air quality standards; Carbon monoxide; Crops; Nitrogen oxides; Ozone; Storms; Air mass trajectories; Air quality monitoring stations; Ambient particulate Matter; Ground based measurement; Meteorological parameters; National ambient air quality standards; Photochemical production; Satellite observations; Dust; carbon monoxide; nitrogen oxide; ozone; aerosol; air quality; carbon monoxide; crop residue; dust; dust storm; meteorology; nitrogen oxides; ozone; particulate matter; spatial distribution; temporal variation; agricultural procedures; air quality; ambient air; Article; concentration (parameter); crop residue burning; dust storm; energy dispersive X ray spectroscopy; Haryana; meteorology; particulate matter; photolysis; priority journal; Rajasthan; scanning electron microscopy; secondary organic aerosol; Gangetic Plain; India; Rajasthan; Thar Desert
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248965
作者单位	Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Dayalbagh, Agra, 282110, India
推荐引用方式 GB/T 7714	Kumari S.,Lakhani A.,Kumari K.M.. Transport of aerosols and trace gases during dust and crop-residue burning events in Indo-Gangetic Plain: Influence on surface ozone levels over downwind region[J],2020,241.
APA	Kumari S.,Lakhani A.,&Kumari K.M..(2020).Transport of aerosols and trace gases during dust and crop-residue burning events in Indo-Gangetic Plain: Influence on surface ozone levels over downwind region.ATMOSPHERIC ENVIRONMENT,241.
MLA	Kumari S.,et al."Transport of aerosols and trace gases during dust and crop-residue burning events in Indo-Gangetic Plain: Influence on surface ozone levels over downwind region".ATMOSPHERIC ENVIRONMENT 241(2020).