干旱区生态环境知识资源中心(Arid): Winter VOCs and OVOCs measured with PTR-MS at an urban site of India: Role of emissions, meteorology and photochemical sources

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DOI	10.1016/j.envpol.2019.113651
	Winter VOCs and OVOCs measured with PTR-MS at an urban site of India: Role of emissions, meteorology and photochemical sources
	Maji, Sujit; Beig, Gufran; Yadav, Ravi
通讯作者	Maji, Sujit ; Yadav, Ravi
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2020
卷号	258
英文摘要	Within the outline of air quality studies at metropolitan city, the mixing ratios of seven selected volatile organic compounds (VOCs) were measured during December 2015 (winter) at an urban site of Pune. The measurement of VOCs was conducted using a proton transfer reaction-quadrupole mass spectrometer (PTR-QMS). The study represents daily variability of ambient VOCs and their various associated emission sources. Diurnal profiles have differed from one VOC to another as the result of their different origins and the influence of different meteorological parameters (i.e. solar radiation, temperature) and planetary boundary layer height (PBL-H). The hourly mixing ratios of Oxygenated-VOCs (OVOCs) and aromatics were in the ranges of 0.6-29 ppbv and 0.13-14 ppbv, respectively with OVOCs accounted for up to 75% of total measured VOCs. The role of long-range transport from the clear Thar Desert and polluted Indo-Gangetic Plain (IGP) was observed during the episodes of 1-15 and 17-31 December 2015, respectively. VOCs showed the strong diurnal variations with peaks during morning and evening hours and lowest in the afternoon. In the evening period, high levels of aromatics coincided with the lowest OVOCs suggests the role of fresh vehicular emissions. Emission ratios of various VOCs as a function of temperature showed the role of different sources including the biogenic and photochemical production as well as the anthropogenic sources, respectively. The higher emission ratio of Delta methanol/Delta acetonitrile at the study site suggests the long range transport of biomass burning plumes from the Indo-Gangetic Plain (IGP) during the 17-31, Dec. 2015. In addition to the pattern of emission, the diurnal and day-to-day variations of VOCs were influenced by the local meteorological conditions and depth of planetary boundary layer (PBL-H). (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	VOCs PTR-QMS Urban air quality Meteorology India
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000519655100095
WOS关键词	VOLATILE ORGANIC-COMPOUNDS ; REACTION MASS-SPECTROMETRY ; LONG-RANGE TRANSPORT ; TOTAL OH REACTIVITY ; MIXING RATIOS ; ANTHROPOGENIC EMISSIONS ; PARTICULATE MATTER ; OCEAN EXPERIMENT ; ASIAN AEROSOLS ; SURFACE OZONE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314440
作者单位	Indian Inst Trop Meteorol Pune, Atmospher Pollut & Transport Modeling APTM Div, Dr Homi Bhabha Rd, Pune 411008, Maharashtra, India
推荐引用方式 GB/T 7714	Maji, Sujit,Beig, Gufran,Yadav, Ravi. Winter VOCs and OVOCs measured with PTR-MS at an urban site of India: Role of emissions, meteorology and photochemical sources[J],2020,258.
APA	Maji, Sujit,Beig, Gufran,&Yadav, Ravi.(2020).Winter VOCs and OVOCs measured with PTR-MS at an urban site of India: Role of emissions, meteorology and photochemical sources.ENVIRONMENTAL POLLUTION,258.
MLA	Maji, Sujit,et al."Winter VOCs and OVOCs measured with PTR-MS at an urban site of India: Role of emissions, meteorology and photochemical sources".ENVIRONMENTAL POLLUTION 258(2020).