Seasonal and diurnal analysis of NO<sub>2</sub> concentrations from a long-duration study conducted in Las Vegas, Nevada

Kimbrough, Sue; Baldauf, Richard; Watkins, Nealson

doi:10.1080/10962247.2013.795919

Cited by 22 publications

(33 citation statements)

References 13 publications

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“…To our knowledge, the only near road air quality studies using a long-term curbside station have been conducted outside of North America and primarily within European Union countries with different fuel use and vehicle fleets than U.S. cities. Near-road air quality research in the U.S has provided critical data about the spatial extent of traffic-related pollution surrounding highways, emission factors under real-world driving conditions, and the contribution of in-car exposure to total exposure using mobile measurements made within the roadway (Cho et al, 2009;Clements et al, 2009;Fruin et al, 2008;Kimbrough et al, 2013;Richmond-Bryant et al, 2009;Zhang et al, 2004;Zhu et al, 2004). This study uses long-term curbside monitoring (1 year) to assess the magnitude and temporal characteristics of roadside traffic-related pollution alongside a heavily-trafficked arterial that accommodates pedestrians, transit users, cyclists, schools, businesses, and homes at the road edge of a major arterial in Portland, Oregon.…”

Section: Introductionmentioning

confidence: 99%

Diurnal and seasonal variations of NO, NO 2 and PM 2.5 mass as a function of traffic volumes alongside an urban arterial

Kendrick

Koonce

George

2015

Atmospheric Environment

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Urban arterial corridors are landscapes that give rise to short and long-term exposures to transportation-related pollution. With high traffic volumes and a wide mix of road users, urban arterial environments are important targets for improved exposure assessment to traffic-related pollution. A common method to estimate exposure is to use traffic volumes as a proxy. The study presented here analyzes a unique yearlong dataset of simultaneous roadside air quality and traffic observations for a U.S. arterial to assess the reliability of using traffic volumes as a proxy for traffic-related exposure. Results show how the relationships of traffic volumes with NO and NO 2 vary not only by time of day and season but also by time aggregation. At short-term aggregations (15 minutes) nitrogen oxides were found to have a significant linear relationship with traffic volumes during morning hours for all seasons although variability was still high (r 2 = 0.1-0.45 NO, r 2 =0.14-0.27 NO 2), and little to no relationship during evening periods (r 2 <0.01-0.03 NO, r 2 <0.01-0.05 NO 2). Comparisons with coarse annual results validate the use of traffic volumes to estimate annual exposure concentrations for morning periods (r 2 = 0.89 NO, r 2 =0.87 NO 2) and evening NO 2 (r 2 =0.46). Traffic volumes are a weak or poor predictor for annual evening NO (r 2 =-0.09) and short-term 15 minute aggregations. Seasonal and diurnal characterizations show that roadside PM 2.5 (mass) measurements do not have a relationship with local traffic volumes, leading us to conclude that PM 2.5 mass is more tied to regional sources and meteorological conditions. As epidemiology and personal exposure assessment research aims to study health impacts and pollutant levels encountered by pedestrians, bicyclists, those waiting for transit, and other road users, these results show when traffic volumes alone can be a reliable proxy for exposure and when this approach is not warranted.

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Section: Introductionmentioning

confidence: 99%

Diurnal and seasonal variations of NO, NO 2 and PM 2.5 mass as a function of traffic volumes alongside an urban arterial

Kendrick

Koonce

George

2015

Atmospheric Environment

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“…This includes understanding the contribution of these facilities to the spatial and temporal variability of this micro-environment, as well as PM concentrations and key species, such as black carbon (BC) [4,7]. Numerous studies have shown elevated levels of air pollutants adjacent to major transportation facilities [8][9][10][11][12][13][14][15][16][17]. Reported health effects from these environments include exacerbation of asthma, as well as cardiovascular and non-asthma respiratory symptoms [4].…”

Section: Environmental and Health Impacts From Transportation Sourcesmentioning

confidence: 99%

The Kansas City Transportation and Local-Scale Air Quality Study (KC-TRAQS): Integration of Low-Cost Sensors and Reference Grade Monitoring in a Complex Metropolitan Area. Part 1: Overview of the Project

et al. 2019

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Emissions from transportation sources can impact local air quality and contribute to adverse health effects. The Kansas City Transportation and Local-Scale Air Quality Study (KC-TRAQS), conducted over a 1-year period, researched emissions source characterization in the Argentine, Turner, and Armourdale, Kansas (KS) neighborhoods and the broader southeast Kansas City, KS area. This area is characterized as a near-source environment with impacts from large railyard operations, major roadways, and commercial and industrial facilities. The spatial and meteorological effects of particulate matter less than 2.5 µm (PM2.5), and black carbon (BC) pollutants on potential population exposures were evaluated at multiple sites using a combination of regulatory grade methods and instrumentation, low-cost sensors, citizen science, and mobile monitoring. The initial analysis of a subset of these data showed that mean reference grade PM2.5 concentrations (gravimetric) across all sites ranged from 7.92 to 9.34 µg/m3. Mean PM2.5 concentrations from low-cost sensors ranged from 3.30 to 5.94 µg/m3 (raw, uncorrected data). Pollution wind rose plots suggest that the sites are impacted by higher PM2.5 and BC concentrations when the winds originate near known source locations. Initial data analysis indicated that the observed PM2.5 and BC concentrations are driven by multiple air pollutant sources and meteorological effects. The KC-TRAQS overview and preliminary data analysis presented will provide a framework for forthcoming papers that will further characterize emission source attributions and estimate near-source exposures. This information will ultimately inform and clarify the extent and impact of air pollutants in the Kansas City area.

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“…With the growth of coastal communities comes air management challenges (Gamas et al, 2015). Local ambient air quality is impacted by the volume of emissions from industry, transportation, and residential activities, as well as meteorological and seasonal changes (Fiore et al, 2015;Kimbrough et al, 2013). Coastal zones are also subject to land-sea breezes (LSBs), caused by the diurnal differential heating/cooling of the sea and land (Crosman and Horel, 2010;Cuxart et al, 2014;Tsai et al, 2011).…”

Section: Coastal Urban Centersmentioning

confidence: 99%

Mapping air quality zones for coastal urban centers

Freeman

Gharabaghi

Munshed

et al. 2017

Journal of the Air & Waste Management Association

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Seasonal and diurnal analysis of NO₂ concentrations from a long-duration study conducted in Las Vegas, Nevada

Cited by 22 publications

References 13 publications

Diurnal and seasonal variations of NO, NO 2 and PM 2.5 mass as a function of traffic volumes alongside an urban arterial

Diurnal and seasonal variations of NO, NO 2 and PM 2.5 mass as a function of traffic volumes alongside an urban arterial

The Kansas City Transportation and Local-Scale Air Quality Study (KC-TRAQS): Integration of Low-Cost Sensors and Reference Grade Monitoring in a Complex Metropolitan Area. Part 1: Overview of the Project

Mapping air quality zones for coastal urban centers

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Seasonal and diurnal analysis of NO2 concentrations from a long-duration study conducted in Las Vegas, Nevada

Cited by 22 publications

References 13 publications

Diurnal and seasonal variations of NO, NO 2 and PM 2.5 mass as a function of traffic volumes alongside an urban arterial

Diurnal and seasonal variations of NO, NO 2 and PM 2.5 mass as a function of traffic volumes alongside an urban arterial

The Kansas City Transportation and Local-Scale Air Quality Study (KC-TRAQS): Integration of Low-Cost Sensors and Reference Grade Monitoring in a Complex Metropolitan Area. Part 1: Overview of the Project

Mapping air quality zones for coastal urban centers

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Seasonal and diurnal analysis of NO₂ concentrations from a long-duration study conducted in Las Vegas, Nevada