Articles | Volume 22, issue 2
Atmos. Chem. Phys., 22, 1131–1148, 2022
https://doi.org/10.5194/acp-22-1131-2022
Atmos. Chem. Phys., 22, 1131–1148, 2022
https://doi.org/10.5194/acp-22-1131-2022

Research article 24 Jan 2022

Research article | 24 Jan 2022

Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels

Miska Olin et al.

Data sets

Time series of gas, particle, and environmental variables measured at the Mäkelänkatu urban street canyon site in May 2017 M. Olin https://doi.org/10.5281/zenodo.3558852

SMEAR III Kumpula meteorology, greenhouse gases and air quality P. Aalto, P. Keronen, M. Leskinen, E. Siivola, and L. Järvi https://doi.org/10.23729/a581f36b-4305-4f52-922a-7a8618567540

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Short summary
An emission factor particle size distribution was determined from the measurements at an urban traffic site. It was used in updating a pre-existing emission inventory, and regional modeling was performed after the update. Emission inventories typically underestimate nanoparticle emissions due to challenges in determining them with high certainty. This update reveals that the simulated aerosol levels have previously been underestimated especially for urban areas and for sub-50 nm particles.
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