气候变化领域集成服务门户(CCPortal): Estimation of NOx and SO2 emissions from Sarnia; Ontario; using a mobile MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) and a NOx analyzer

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DOI	10.5194/acp-19-13871-2019
	Estimation of NOx and SO2 emissions from Sarnia; Ontario; using a mobile MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) and a NOx analyzer
	Davis Z.Y.W.; Baray S.; McLinden C.A.; Khanbabakhani A.; Fujs W.; Csukat C.; Debosz J.; McLaren R.
发表日期	2019
ISSN	16807316
起始页码	13871
结束页码	13889
卷号	19 期号:22
英文摘要	Sarnia, Ontario, experiences pollutant emissions disproportionate to its relatively small size. The small size of the city limits traditional top-down emission estimate techniques (e.g., satellite) but a low-cost solution for emission monitoring is the mobile MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy). Measurements were made using this technique from 21 March 2017 to 23 March 2017 along various driving routes to retrieve vertical column densities (VCDs) of NO2 and SO2 and to estimate emissions of NOx and SO2 from the Sarnia region. A novel aspect of the current study was the installation of a NOx analyzer in the vehicle to allow real time measurement and characterization of near-surface NOx=NO2 ratios across the urban plumes, allowing improved accuracy of NOx emission estimates. Confidence in the use of nearsurface-measured NOx=NO2 ratios for estimation of NOx emissions was increased by relatively well-mixed boundary layer conditions. These conditions were indicated by similar temporal trends in NO2 VCDs and mixing ratios when measurements were sufficiently distant from the sources. Leighton ratios within transported plumes indicated peroxy radicals were likely disturbing the NO-NO2-O3 photostationary state through VOC (volatile organic compound) oxidation. The average lower-limit emission estimate of NOx from Sarnia was 1:60 ± 0:34 th-1 using local 10 m elevation wind-speed measurements. Our estimates were larger than the downscaled annual 2017 NPRI-reported (National Pollution Release Inventory) industrial emissions of 0.9 tNOx h-1. Our lower-limit estimate of SO2 emissions from Sarnia was 1:81 ± 0:83 tSO2 h-1, equal within uncertainty to the 2017 NPRI downscaled value of 1.85 tSO2 h-1. Satellite-derived NO2 VCDs over Sarnia from the ozone monitoring instrument (OMI) were lower than mobile MAX-DOAS VCDs, likely due to the large pixel size relative to the city's size. The results of this study support the utility of the mobile MAXDOAS method for estimating NOx and SO2 emissions in relatively small, highly industrialized regions, especially when supplemented with mobile NOx measurements. © 2017 Georg Thieme Verlag. All rights reserved.
语种	英语
scopus关键词	accuracy assessment; atmospheric pollution; emission inventory; nitrogen oxides; pollution monitoring; real time; satellite data; spectrometry; sulfur dioxide; volatile organic compound; Canada; Ontario [Canada]; Sarnia
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144037
作者单位	Graduate Program in Earth and Space Science, York University, Toronto, M3J 1P3, Canada; Centre for Atmospheric Chemistry, York University, Toronto, M3J 1P3, Canada; Environment and Climate Change Canada, Toronto, M3H 5T4, Canada; Air Quality Monitoring and Assessment Unit, Ontario Ministry of the Environment, Conservation and Parks, Etobicoke, M9P 3V6, Canada
推荐引用方式 GB/T 7714	Davis Z.Y.W.,Baray S.,McLinden C.A.,et al. Estimation of NOx and SO2 emissions from Sarnia; Ontario; using a mobile MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) and a NOx analyzer[J],2019,19(22).
APA	Davis Z.Y.W..,Baray S..,McLinden C.A..,Khanbabakhani A..,Fujs W..,...&McLaren R..(2019).Estimation of NOx and SO2 emissions from Sarnia; Ontario; using a mobile MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) and a NOx analyzer.Atmospheric Chemistry and Physics,19(22).
MLA	Davis Z.Y.W.,et al."Estimation of NOx and SO2 emissions from Sarnia; Ontario; using a mobile MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) and a NOx analyzer".Atmospheric Chemistry and Physics 19.22(2019).