Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 18
Articles | Volume 25, issue 18
https://doi.org/10.5194/acp-25-11483-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-11483-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 18
Research article
 | 
29 Sep 2025
Research article |  | 29 Sep 2025

Seasonal differences in observed versus modelled new particle formation at two European boreal stations

Carl Svenhag, Pontus Roldin, Tinja Olenius, Robin Wollesen de Jonge, Sara M. Blichner, Daniel Yazgi, and Moa K. Sporre

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Short summary
This study is an investigation of the model representation of how particles are formed and grow in the atmosphere. Using modelled and observed data from two boreal forest stations in 2018, we identify key factors for new particle formation to improve particle climate predictions in the global EC-Earth3 model. Comparisons with the detailed ADCHEM model show that adding ammonia improves particle growth predictions, though EC-Earth3 still greatly underestimates the number of particles during warmer months.
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