Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 21
Articles | Volume 26, issue 21
https://doi.org/10.5194/acp-26-16003-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-16003-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 21
Research article
 | 
12 Nov 2026
Research article |  | 12 Nov 2026

New particle formation contribution to aerosol mass: regimes and implications for future urban environments

Runlong Cai, Shimeng Xu, Veli-Matti Kerminen, and Markku Kulmala

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Short summary
New particle formation (NPF) is a dominant global source of atmospheric particle number concentration and cloud condensation nuclei, yet its contribution to aerosol mass remains an open question. A prevailing hypothesis argues that vapors would partition into the particle phase regardless of the existence of new particles. Here we challenge this hypothesis by showing that NPF can significantly affect the aerosol surface area distribution and may further contribute significantly to aerosol mass.
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