Articles | Volume 3, issue 2
https://doi.org/10.5194/ar-3-503-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ar-3-503-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
13 Nov 2025
Research article |
| 13 Nov 2025
| 13 Nov 2025
Long-term PM trends at boreal forest site in southern Finland from three different measurement techniques
Ilona Ylivinkka
CORRESPONDING AUTHOR
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Station for Measuring Ecosystem–Atmosphere Relations II (SMEAR II), University of Helsinki, 35500 Korkeakoski, Finland
Helmi-Marja Keskinen
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Lauri R. Ahonen
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Station for Measuring Ecosystem–Atmosphere Relations II (SMEAR II), University of Helsinki, 35500 Korkeakoski, Finland
Liine Heikkinen
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Department of Environmental Science, Stockholm University, Stockholm, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Pasi P. Aalto
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Tuomo Nieminen
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Department of Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
Katrianne Lehtipalo
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Finnish Meteorological Institute, 00560 Helsinki, Finland
Krista Luoma
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Finnish Meteorological Institute, 00560 Helsinki, Finland
Sujai Banerji
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Juho Aalto
Station for Measuring Ecosystem–Atmosphere Relations II (SMEAR II), University of Helsinki, 35500 Korkeakoski, Finland
Institute for Atmospheric and Earth System Research (INAR)/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, 00014 Helsinki, Finland
Janne Levula
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Jutta Kesti
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Finnish Meteorological Institute, 00560 Helsinki, Finland
Ekaterina Ezhova
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Markku Kulmala
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Tuukka Petäjä
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
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Short summary
Three different particulate matter (PM) measurement techniques were compared in Finland, showing good correlation (R about 0.8). Although the measured PM concentrations were low, decreasing trends were observed in all seasons. The decrease followed the trends observed in concentrations of anthropogenic pollutants, resulting from the EU legislation to improve air quality. The highest PM concentrations were measured in summer, indicating the dominance of organic compounds to the PM mass.
Three different particulate matter (PM) measurement techniques were compared in Finland, showing...
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