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Nathan Hilker
Researcher at University of Toronto
Publications - 19
Citations - 731
Nathan Hilker is an academic researcher from University of Toronto. The author has contributed to research in topics: Air quality index & Atmospheric dispersion modeling. The author has an hindex of 12, co-authored 18 publications receiving 486 citations.
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Journal ArticleDOI
Ambient measurements and source apportionment of fossil fuel and biomass burning black carbon in Ontario
Robert M. Healy,Uwayemi Sofowote,Yushan Su,Jerzy Debosz,Michael Noble,Cheol-Heon Jeong,Jon M. Wang,Nathan Hilker,Greg J. Evans,Geoff Doerksen,Kevin S. Jones,A Muñoz +11 more
TL;DR: In this article, the authors investigated sources of black carbon (BC) influencing air quality in Ontario, Canada were investigated using nine concurrent Aethalometer datasets collected between June 2015 and May 2016.
Journal ArticleDOI
Temporal and spatial variability of traffic-related PM2.5 sources: Comparison of exhaust and non-exhaust emissions
Cheol-Heon Jeong,Jon M. Wang,Nathan Hilker,Jerzy Debosz,Uwayemi Sofowote,Yushan Su,Michael Noble,Robert M. Healy,Tony Munoz,Ewa Dabek-Zlotorzynska,Valbona Celo,Luc White,Céline Audette,Dennis Herod,Greg J. Evans +14 more
TL;DR: The contribution of traffic-related particulate matter (PM2.5, particles smaller than 2.5μm in diameter) sources can vary temporally and spatially, which may disproportionately contribute to health outcomes as mentioned in this paper.
Journal ArticleDOI
Light‐absorbing properties of ambient black carbon and brown carbon from fossil fuel and biomass burning sources
Robert M. Healy,Robert M. Healy,Jack M. Wang,Cheol-Heon Jeong,Alex K. Y. Lee,Megan D. Willis,Ezzat Jaroudi,Naomi Zimmerman,Nathan Hilker,Michael Murphy,Sabine Eckhardt,Andreas Stohl,Jonathan P. D. Abbatt,John C. Wenger,Greg J. Evans +14 more
TL;DR: In this article, the optical properties of ambient black carbon-containing particles and the composition of their associated coatings were investigated at a downtown site in Toronto, Canada, for 2 weeks in June 2013.
Journal ArticleDOI
Field Measurements of Gasoline Direct Injection Emission Factors: Spatial and Seasonal Variability
Naomi Zimmerman,Jonathan M. Wang,Cheol-Heon Jeong,Manuel Ramos,Nathan Hilker,Robert M. Healy,Kelly Sabaliauskas,James S. Wallace,Greg J. Evans +8 more
TL;DR: GDI vehicle PN EFs were found to increase by up to 240% with increasing distance from the roadway, predominantly due to an increasing fraction of sub-40 nm particles.
Journal ArticleDOI
Near-Road Air Pollutant Measurements: Accounting for Inter-Site Variability Using Emission Factors.
Jonathan M. Wang,Jonathan M. Wang,Cheol-Heon Jeong,Nathan Hilker,Kerolyn K. Shairsingh,Robert M. Healy,Uwayemi Sofowote,Jerzy Debosz,Yushan Su,Michiyo McGaughey,Geoff Doerksen,Tony Munoz,Luc White,Dennis Herod,Greg J. Evans +14 more
TL;DR: Pollutant EFs varied with ambient temperature and because there were little seasonal changes in fleet composition, this was attributed to changes in fuel composition and/or post-tailpipe transformation of pollutants.