Articles | Volume 25, issue 1
https://doi.org/10.5194/acp-25-183-2025
https://doi.org/10.5194/acp-25-183-2025
Research article
 | 
08 Jan 2025
Research article |  | 08 Jan 2025

Can pollen affect precipitation?

Marje Prank, Juha Tonttila, Xiaoxia Shang, Sami Romakkaniemi, and Tomi Raatikainen

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Cited articles

Ahola, J., Korhonen, H., Tonttila, J., Romakkaniemi, S., Kokkola, H., and Raatikainen, T.: Modelling mixed-phase clouds with the large-eddy model UCLALES–SALSA, Atmos. Chem. Phys., 20, 11639–11654, https://doi.org/10.5194/acp-20-11639-2020, 2020. 
Augustin, S., Wex, H., Niedermeier, D., Pummer, B., Grothe, H., Hartmann, S., Tomsche, L., Clauss, T., Voigtländer, J., Ignatius, K., and Stratmann, F.: Immersion freezing of birch pollen washing water, Atmos. Chem. Phys., 13, 10989–11003, https://doi.org/10.5194/acp-13-10989-2013, 2013. 
Aznar, F., Negral, L., Moreno-Grau, S., Costa, I., Lara, B., Romero-Morte, J., Rojo, J., Rodríguez-Arias, R. M., Fernández-González, F., Pérez-Badia, R., and Moreno, J. M.: Increased rupture of cypress pollen type due to atmospheric water in central and southeastern Spain, Sci. Total Environ., 954, 176298, https://doi.org/10.1016/j.scitotenv.2024.176298, 2024. 
Burkart, J., Gratzl, J., Seifried, T. M., Bieber, P., and Grothe, H.: Isolation of subpollen particles (SPPs) of birch: SPPs are potential carriers of ice nucleating macromolecules, Biogeosciences, 18, 5751–5765, https://doi.org/10.5194/bg-18-5751-2021, 2021. 
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Short summary
Large primary bioparticles such as pollen can be abundant in the atmosphere. In humid conditions pollen can rupture and release a large number of fine sub-pollen particles (SPPs). The paper investigates what kind of birch pollen concentrations are needed for the pollen and SPPs to start playing a noticeable role in cloud processes and alter precipitation formation. In the studied cases only the largest observed pollen concentrations were able to noticeably alter the precipitation formation.
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