Articles | Volume 21, issue 13
https://doi.org/10.5194/acp-21-9931-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-21-9931-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report
| 
02 Jul 2021
Measurement report |
| 02 Jul 2021
| 02 Jul 2021
Measurement report: The influence of traffic and new particle formation on the size distribution of 1–800 nm particles in Helsinki – a street canyon and an urban background station comparison
Magdalena Okuljar
CORRESPONDING AUTHOR
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Heino Kuuluvainen
Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland
Jenni Kontkanen
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Olga Garmash
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Miska Olin
Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland
Jarkko V. Niemi
Helsinki Region Environmental Services Authority, P.O. Box 100, 00066, Helsinki, Finland
Hilkka Timonen
Atmospheric Composition Research, Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland
Juha Kangasluoma
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Yee Jun Tham
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Rima Baalbaki
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Mikko Sipilä
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Laura Salo
Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland
Henna Lintusaari
Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland
Harri Portin
Helsinki Region Environmental Services Authority, P.O. Box 100, 00066, Helsinki, Finland
Kimmo Teinilä
Atmospheric Composition Research, Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland
Minna Aurela
Atmospheric Composition Research, Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland
Miikka Dal Maso
Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland
Topi Rönkkö
Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland
Tuukka Petäjä
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
Pauli Paasonen
Institute of Atmospheric and Earth System Science/Physics, Faculty of Science, University of Helsinki, 00014, Helsinki, Finland
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Cited
21 citations as recorded by crossref.
- Improving the current air quality index with new particulate indicators using a robust statistical approach P. Fung et al. 10.1016/j.scitotenv.2022.157099
- Influence of emission size distribution and nucleation on number concentrations over Greater Paris K. Sartelet et al. 10.5194/acp-22-8579-2022
- Source apportionment of particle number size distribution at the street canyon and urban background sites S. Harni et al. 10.5194/acp-24-12143-2024
- The effect of COVID-19 restrictions on atmospheric new particle formation in Beijing C. Yan et al. 10.5194/acp-22-12207-2022
- Measurement report: Wintertime aerosol characterization at an urban traffic site in Helsinki, Finland K. Teinilä et al. 10.5194/acp-25-4907-2025
- Sub-23 nm Particles Dominate Non-Volatile Particle Number Emissions of Road Traffic H. Lintusaari et al. 10.1021/acs.est.3c03221
- Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels M. Olin et al. 10.5194/acp-22-1131-2022
- Sulfuric acid, base, and low-volatility organics contribute to aerosol nucleation in urban Houston L. Tiszenkel et al. 10.1038/s43247-025-02310-4
- Particle Number Size Distribution of Wintertime Alpine Aerosols and Their Activation as Cloud Condensation Nuclei in the Guanzhong Plain, Northwest China Y. Chen et al. 10.1029/2022JD037877
- Phenomenology of ultrafine particle concentrations and size distribution across urban Europe P. Trechera et al. 10.1016/j.envint.2023.107744
- Measurement report: Size distributions of urban aerosols down to 1 nm from long-term measurements C. Deng et al. 10.5194/acp-22-13569-2022
- High Concentration of Atmospheric Sub‐3 nm Particles in Polluted Environment of Eastern China: New Particle Formation and Traffic Emission L. Chen et al. 10.1029/2023JD039669
- Opinion: A paradigm shift in investigating the general characteristics of atmospheric new particle formation using field observations M. Kulmala et al. 10.5194/ar-2-49-2024
- Road Traffic Emissions Lead to Much Enhanced New Particle Formation through Increased Growth Rates J. Brean et al. 10.1021/acs.est.3c10526
- Parameterization of particle formation rates in distinct atmospheric environments X. Li et al. 10.5194/ar-3-271-2025
- Measurement report: The influence of traffic and new particle formation on the size distribution of 1–800 nm particles in Helsinki – a street canyon and an urban background station comparison M. Okuljar et al. 10.5194/acp-21-9931-2021
- The annual cycle and sources of relevant aerosol precursor vapors in the central Arctic during the MOSAiC expedition M. Boyer et al. 10.5194/acp-24-12595-2024
- Modeling non-linear changes in an urban setting: From pro-environmental affordances to responses in behavior, emissions and air quality M. Hulkkonen et al. 10.1007/s13280-022-01827-8
- An evaluation of new particle formation events in Helsinki during a Baltic Sea cyanobacterial summer bloom R. Thakur et al. 10.5194/acp-22-6365-2022
- Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison M. Okuljar et al. 10.5194/acp-23-12965-2023
- Measurement report: The influence of traffic and new particle formation on the size distribution of 1–800 nm particles in Helsinki – a street canyon and an urban background station comparison M. Okuljar et al. 10.5194/acp-21-9931-2021
20 citations as recorded by crossref.
- Improving the current air quality index with new particulate indicators using a robust statistical approach P. Fung et al. 10.1016/j.scitotenv.2022.157099
- Influence of emission size distribution and nucleation on number concentrations over Greater Paris K. Sartelet et al. 10.5194/acp-22-8579-2022
- Source apportionment of particle number size distribution at the street canyon and urban background sites S. Harni et al. 10.5194/acp-24-12143-2024
- The effect of COVID-19 restrictions on atmospheric new particle formation in Beijing C. Yan et al. 10.5194/acp-22-12207-2022
- Measurement report: Wintertime aerosol characterization at an urban traffic site in Helsinki, Finland K. Teinilä et al. 10.5194/acp-25-4907-2025
- Sub-23 nm Particles Dominate Non-Volatile Particle Number Emissions of Road Traffic H. Lintusaari et al. 10.1021/acs.est.3c03221
- Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels M. Olin et al. 10.5194/acp-22-1131-2022
- Sulfuric acid, base, and low-volatility organics contribute to aerosol nucleation in urban Houston L. Tiszenkel et al. 10.1038/s43247-025-02310-4
- Particle Number Size Distribution of Wintertime Alpine Aerosols and Their Activation as Cloud Condensation Nuclei in the Guanzhong Plain, Northwest China Y. Chen et al. 10.1029/2022JD037877
- Phenomenology of ultrafine particle concentrations and size distribution across urban Europe P. Trechera et al. 10.1016/j.envint.2023.107744
- Measurement report: Size distributions of urban aerosols down to 1 nm from long-term measurements C. Deng et al. 10.5194/acp-22-13569-2022
- High Concentration of Atmospheric Sub‐3 nm Particles in Polluted Environment of Eastern China: New Particle Formation and Traffic Emission L. Chen et al. 10.1029/2023JD039669
- Opinion: A paradigm shift in investigating the general characteristics of atmospheric new particle formation using field observations M. Kulmala et al. 10.5194/ar-2-49-2024
- Road Traffic Emissions Lead to Much Enhanced New Particle Formation through Increased Growth Rates J. Brean et al. 10.1021/acs.est.3c10526
- Parameterization of particle formation rates in distinct atmospheric environments X. Li et al. 10.5194/ar-3-271-2025
- Measurement report: The influence of traffic and new particle formation on the size distribution of 1–800 nm particles in Helsinki – a street canyon and an urban background station comparison M. Okuljar et al. 10.5194/acp-21-9931-2021
- The annual cycle and sources of relevant aerosol precursor vapors in the central Arctic during the MOSAiC expedition M. Boyer et al. 10.5194/acp-24-12595-2024
- Modeling non-linear changes in an urban setting: From pro-environmental affordances to responses in behavior, emissions and air quality M. Hulkkonen et al. 10.1007/s13280-022-01827-8
- An evaluation of new particle formation events in Helsinki during a Baltic Sea cyanobacterial summer bloom R. Thakur et al. 10.5194/acp-22-6365-2022
- Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison M. Okuljar et al. 10.5194/acp-23-12965-2023
Latest update: 12 Jul 2025
Short summary
To estimate the relative contribution of different sources to the particle population in an urban environment, we conducted simultaneous measurements at a street canyon and an urban background station in Helsinki. We investigated the contribution of traffic and new particle formation to particles with a diameter between 1 and 800 nm. We found that during spring traffic does not dominate the particles smaller than 3 nm at either of the stations.
To estimate the relative contribution of different sources to the particle population in an...
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