The presentation on “Studying indirect aerosol effects during heavy rain episodes in midlatitude deep cyclone synoptic conditions” was delivered during the Atmosphere and Climate Competence Centre (ACCC) & Finnish Atmospheric Science Network (FASN) Science Conference held at the premises of the University of Helsinki and the Finnish Meteorological Institute during 10-12 November 2025 (Helsinki, Finland).

The presentation focus was on the modelling analysis using the Enviro-HIRLAM modelling system for studying variability and changes in meteorological conditions due to indirect aerosol effects under midlatitude deep cyclone synoptic patterns. These conditions resulted in severe flooding events. During these heavy rain episodes it was found that the increased concentrations of sulfate and sea salt aerosols led to a significant enhancement of specific cloud ice, liquid water, cloud condensate, and cloudiness in the 2–4 km layer.

See more details in the presentation.
Text by: Mykhailo Savenets and Larysa Pysarenko, Ukrainian Hydrometerological Institute (UHMI), Kyiv, Ukraine