气候变化领域集成服务门户(CCPortal): Evaluation of urban ozone in the Brahmaputra River Valley

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DOI	10.1016/j.apr.2019.12.013
	Evaluation of urban ozone in the Brahmaputra River Valley
	Dumka U.C.; Gautam A.S.; Tiwari S.; Mahar D.S.; Attri S.D.; Chakrabarty R.K.; Permita P.; Hopke P.K.; Hooda R.
发表日期	2020
ISSN	13091042
卷号	11 期号:3
英文摘要	Ozone (O3), carbon monoxide (CO), nitrogen oxides (NOx = NO + NO2), methane (CH4) and non-methane hydrocarbons (NMHCs) were measured in Guwahati in the Brahmaputra River Valley (BRV) of northeastern India from January 1, 2013 to June 30, 2014. The current analysis shows that the annual mean concentrations of O3, CO, CO2, NOx, CH4, and NMHC in Guwahati were 10.5 (±6.30 ppb), 0.5 (±0.2 ppm), 411.7 (±37.5 ppm), 19.6 (±11.6 ppb), 2045(±417 ppb) and 173(±93 ppb), respectively. The pattern of O3concentrations in Guwahati indicated it was strongly influenced by local NOx sources with an adjacent national highway being the likely major source. Thus, the measured O3 values were reduced by local titration. Diel, weekly, and seasonal patterns for each of these gaseous species showed the strong influence of local sources. The mean ventilation coefficient was greater than >6000 m2s during the day in the pre-monsoon season indicating pollutant dispersion. The seasonally average solar radiation (SR) fluxes decreased in the order: pre-monsoon (180 W m−2), monsoon (176 W m−2), post-monsoon (148 W m−2) and winter (110 W m−2).The corresponding mean O3 concentrations were 14.8, 7.5, 6.4, and 10.1 ppb, respectively. In the pre-monsoon season, an impact of SR on the photochemical formation of O3was observed. High O3 winter concentrations were observed likely driven by local biomass burning providing reactive VOCs that contributed to ozone formation. © 2020 Turkish National Committee for Air Pollution Research and Control
英文关键词	Brahmaputra river valley; Nonmethane hydrocarbons (NMHCs); Northeastern India; NOx titration; Ozone; Pollutant gases
语种	英语
来源期刊	Atmospheric Pollution Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120564
作者单位	Aryabhatta Research Institute of Observational Sciences, Nainital, 263 001, India; Indian Institute Meteorological Department, New Delhi Branch, 110060, India; H.N.B. Garhwal University, Srinagar, Uttarakhand 246174, India; India Meteorological Department, New Delhi, 110060, India; Center for Aerosol Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, United States; Center for Air Resources Engineering and Science, Clarkson University, Potsdam, NY 13699- 5708, United States; Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States; Department of Zoology, Maharshi Dayanand University, Rohtak, Haryana, India
推荐引用方式 GB/T 7714	Dumka U.C.,Gautam A.S.,Tiwari S.,et al. Evaluation of urban ozone in the Brahmaputra River Valley[J],2020,11(3).
APA	Dumka U.C..,Gautam A.S..,Tiwari S..,Mahar D.S..,Attri S.D..,...&Hooda R..(2020).Evaluation of urban ozone in the Brahmaputra River Valley.Atmospheric Pollution Research,11(3).
MLA	Dumka U.C.,et al."Evaluation of urban ozone in the Brahmaputra River Valley".Atmospheric Pollution Research 11.3(2020).