Search Results - "Hilker, Nathan"

Temporal and spatial variability of traffic-related PM2.5 sources: Comparison of exhaust and non-exhaust emissions by Jeong, Cheol-Heon, Wang, Jon M., Hilker, Nathan, Debosz, Jerzy, Sofowote, Uwayemi, Su, Yushan, Noble, Michael, Healy, Robert M., Munoz, Tony, Dabek-Zlotorzynska, Ewa, Celo, Valbona, White, Luc, Audette, Céline, Herod, Dennis, Evans, Greg J.

“…The contribution of traffic-related particulate matter (PM2.5, particles smaller than 2.5 μm in diameter) sources can vary temporally and spatially, which may…”
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Characteristics and sources of PM2.5 and reactive gases near roadways in two metropolitan areas in Canada by Dabek-Zlotorzynska, Ewa, Celo, Valbona, Ding, Luyi, Herod, Dennis, Jeong, Cheol-Heon, Evans, Greg, Hilker, Nathan

“…With concern in recent years about adverse health effects for populations living or spending significant amounts of time near large roadways, an investigation…”
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Long-term analysis of PM2.5 from 2004 to 2017 in Toronto: Composition, sources, and oxidative potential by Jeong, Cheol-Heon, Traub, Alison, Huang, Angela, Hilker, Nathan, Wang, Jonathan M., Herod, Dennis, Dabek-Zlotorzynska, Ewa, Celo, Valbona, Evans, Greg J.

“…Long-term trends (2004–2017) in the chemical composition and sources of PM2.5 (particulate matter smaller than 2.5 μm in diameter) in a metropolitan area were…”
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Quantifying metal emissions from vehicular traffic using real world emission factors by Wang, Jonathan M., Jeong, Cheol-Heon, Hilker, Nathan, Healy, Robert M., Sofowote, Uwayemi, Debosz, Jerzy, Su, Yushan, Munoz, Anthony, Evans, Greg J.

“…Road traffic emissions are an increasingly important source of particulate matter in urban and non-road environments, where non-tailpipe emissions can…”
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Elucidating long-term trends, seasonal variability, and local impacts from thirteen years of near-road particle size data (2006–2019) by Hilker, Nathan, Jeong, Cheol-Heon, Wang, Jonathan M., Evans, Greg J.

“…Significant attention, especially in the last decade, has been focussed on elevated concentrations of ultrafine particulate matter (UFP) in urban areas and the…”
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Characterization of winter air pollutant gradients near a major highway by Jeong, Cheol-Heon, Hilker, Nathan, Wang, Jon M., Debosz, Jerzy, Healy, Robert M., Sofowote, Uwayemi, Munoz, Tony, Herod, Dennis, Evans, Greg J.

“…Traffic-related air pollutants (TRAP) including nitric oxide (NO), nitrogen oxide (NOx), carbon monoxide (CO), ultrafine particles (UFP), black carbon (BC),…”
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Black carbon in the Lower Fraser Valley, British Columbia: Impact of 2017 wildfires on local air quality and aerosol optical properties by Healy, Robert M., Wang, Jonathan M., Sofowote, Uwayemi, Su, Yushan, Debosz, Jerzy, Noble, Michael, Munoz, Anthony, Jeong, Cheol-Heon, Hilker, Nathan, Evans, Greg J., Doerksen, Geoff

“…Exposure to wildfire smoke is a public health issue of increasing prominence in North America, particularly in western states and provinces. In this study,…”
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Field Measurements of Gasoline Direct Injection Emission Factors: Spatial and Seasonal Variability by Zimmerman, Naomi, Wang, Jonathan M, Jeong, Cheol-Heon, Ramos, Manuel, Hilker, Nathan, Healy, Robert M, Sabaliauskas, Kelly, Wallace, James S, Evans, Greg J

“…Four field campaigns were conducted between February 2014 and January 2015 to measure emissions from light-duty gasoline direct injection (GDI) vehicles (2013…”
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Near-Road Air Pollutant Measurements: Accounting for Inter-Site Variability Using Emission Factors by Wang, Jonathan M, Jeong, Cheol-Heon, Hilker, Nathan, Shairsingh, Kerolyn K, Healy, Robert M, Sofowote, Uwayemi, Debosz, Jerzy, Su, Yushan, McGaughey, Michiyo, Doerksen, Geoff, Munoz, Tony, White, Luc, Herod, Dennis, Evans, Greg J

“…A daily integrated emission factor (EF) method was applied to data from three near-road monitoring sites to identify variables that impact traffic related…”
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WITHDRAWN: Corrigendum to ‘Measurement of real-world roadway emission rates through a fitted dispersion model’ <[Atmospheric Pollution Research 12 (2021) 75–88]> by Edwards, Taylor D., Wang, Jonathan M., Hilker, Nathan, Jeong, Cheol-Heon, Evans, Greg J.

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Real-World Emission of Particles from Vehicles: Volatility and the Effects of Ambient Temperature by Wang, Jonathan M, Jeong, Cheol-Heon, Zimmerman, Naomi, Healy, Robert M, Hilker, Nathan, Evans, Greg J

“…A majority of the ultrafine particles observed in real-world conditions are systematically excluded from many measurements that help to guide regulation of…”
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Measurement of real-world roadway emission rates through a fitted dispersion model by Edwards, Taylor D., Wang, Jonathan M., Hilker, Nathan, Jeong, Cheol-Heon, Evans, Greg J.

“…This paper presents a methodology for estimating fleet emission rates from measured roadside concentrations. By filtering measurements based on meteorological…”
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Air Pollution Measurements Near Roadways: Verifying Measurements and Discerning Traffic-Related Signal from Background by Hilker, Nathan Anthony

“…The work in this thesis examined multiple years of air quality data collected in near-roadway and urban background environments as part of an air quality…”
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Comparing emission rates derived from a model with those estimated using a plume-based approach and quantifying the contribution of vehicle classes to on-road emissions and air quality by Xu, Junshi, Wang, Jonathan, Hilker, Nathan, Fallah-Shorshani, Masoud, Saleh, Marc, Tu, Ran, Wang, An, Minet, Laura, Stogios, Christos, Evans, Greg, Hatzopoulou, Marianne

“…This study presents a comparison of fleet average emission factor (s) derived from a traffic emission model with EFs estimated using plume-based measurements,…”
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Traffic-related air pollution near roadways: discerning local impacts from background by Hilker, Nathan, Wang, Jonathan M, Jeong, Cheol-Heon, Healy, Robert M, Sofowote, Uwayemi, Debosz, Jerzy, Su, Yushan, Noble, Michael, Munoz, Anthony, Doerksen, Geoff, White, Luc, Audette, Celine, Herod, Dennis, Brook, Jeffrey R, Evans, Greg J

“…Adverse health outcomes related to exposure to air pollution have gained much attention in recent years, with a particular emphasis on traffic-related…”
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Contrasting the direct use of data from traffic radars and video-cameras with traffic simulation in the estimation of road emissions and PM hotspot analysis by Xu, Junshi, Hilker, Nathan, Turchet, Matheus, Al-Rijleh, Mohamad-Kenan, Tu, Ran, Wang, An, Fallahshorshani, Masoud, Evans, Greg, Hatzopoulou, Marianne

“…•Data from a microwave radar and a video camera were used for emission modelling.•The microwave radar exhibits poor performance in terms of vehicle…”
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