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Preprints
https://doi.org/10.5194/acp-2020-923
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-923
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  06 Oct 2020

06 Oct 2020

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This preprint is currently under review for the journal ACP.

Aerosol particle formation in the upper residual layer

Janne Lampilahti1, Katri Leino1, Antti Manninen2, Pyry Poutanen1, Anna Franck1, Maija Peltola1, Paula Hietala1, Lisa Beck1, Lubna Dada1, Lauriane Quéléver1, Ronja Öhrnberg1, Ying Zhou3, Madeleine Ekblom1, Ville Vakkari2,4, Sergej Zilitinkevich1,2, Veli-Matti Kerminen1, Tuukka Petäjä1,5, and Markku Kulmala1,3,5 Janne Lampilahti et al.
  • 1Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
  • 2Finnish Meteorological Institute, Helsinki, Finland
  • 3Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
  • 4Atmospheric Chemistry Research Group, Chemical Resource Beneficiation, North-West University, Potchefstroom, South Africa
  • 5Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing University, Nanjing, China

Abstract. According to current estimates, atmospheric new particle formation (NPF) produces a large fraction of aerosol particles and cloud condensation nuclei in the earth’s atmosphere, therefore having implications for health and climate. Despite recent advances, atmospheric NPF is still insufficiently understood in the upper parts of the boundary layer (BL). In addition, it is unclear how NPF in upper BL is related to the processes observed in the near-surface layer. The role of the topmost part of the residual layer (RL) in NPF is to a large extent unexplored. This paper presents new results from co-located airborne and ground-based measurements in a boreal forest environment, showing that many NPF events (∼42 %) appear to start in the upper RL. The freshly formed particles may be entrained into the growing mixed layer (ML) where they continue to grow in size, similar to the aerosol particles formed within the ML. The results suggest that in the boreal forest environment, NPF in the upper RL has an important contribution to the aerosol load in the BL.

Janne Lampilahti et al.

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Aerosol particle formation in the upper residual layer: dataset Janne Lampilahti, Katri Leino, Antti Manninen, Pyry Poutanen, Anna Franck, Maija Peltola, Paula Hietala, Lisa Beck, Lubna Dada, Lauriane Quéléver, Ronja Öhrnberg, Ying Zhou, Madeleine Ekblom, Ville Vakkari, Sergej Zilitinkevich, Veli-Matti Kerminen, Tuukka Petäjä, and Markku Kulmala https://doi.org/10.5281/zenodo.4063662

Janne Lampilahti et al.

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