Articles | Volume 18, issue 23
Atmos. Chem. Phys., 18, 16979–17001, 2018
https://doi.org/10.5194/acp-18-16979-2018
Atmos. Chem. Phys., 18, 16979–17001, 2018
https://doi.org/10.5194/acp-18-16979-2018

Research article 30 Nov 2018

Research article | 30 Nov 2018

Elucidating real-world vehicle emission factors from mobile measurements over a large metropolitan region: a focus on isocyanic acid, hydrogen cyanide, and black carbon

Sumi N. Wren et al.

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Short summary
We made measurements from a mobile laboratory across a large urban area and determined fleet-average vehicle emission factors (EFs) for a suite of traffic-related air pollutants. We present the first real-world EFs for isocyanic acid (HNCO) and hydrogen cyanide (HCN) and insight into their on-road variability. We find that vehicles may represent an important source of these air toxics at an urban scale. This work has implications for understanding population exposure to these species.
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