Ice nucleation

The Aerosols and Clouds group studies ice nucleation across scales and methods, combining molecular simulations, laboratory experiments, field measurements, and atmospheric modelling. We investigate how water adsorbs and freezes on ice-nucleating particles (INPs), develop theoretical frameworks such as the Adsorption-Freezing Model, and measure ambient INP concentrations at sites across Finland. Together, these activities aim to improve our understanding of cloud formation and its role in climate.

Publications

Laaksonen, A., Roudsari, G., Piedehierro, A. A., and Welti, A.: Homogeneous ice nucleation in adsorbed water films: a theoretical approach, Atmos. Chem. Phys., 25, 11317–11332, https://doi.org/10.5194/acp-25-11317-2025, 2025.

Juurikkala, K., Williamson, C. J., Froyd, K. D., Dean-Day, J., and Laaksonen, A.: Prior heterogeneous ice nucleation events shape homogeneous freezing during the evolution of synoptic cirrus, Atmos. Chem. Phys., 25, 13995–14013, https://doi.org/10.5194/acp-25-13995-2025, 2025.