Solar radiation flux density is one of the most important factors determining the productivity of terrestrial ecosystems. However, the degree of its diffusion can result in both an increase or decrease in the plants' CO₂ absorption. Since diffused radiation has a better ability to penetrate the vegetation canopy it results in the activation of the lower-located leaves. Thanks to this process the plants gain additional potential to absorb the CO₂. There are both absorption and scattering processes determined by the particles that are suspended in the atmosphere, i.e. clouds and aerosols but their impact on ecosystem productivity still requires investigations. Thus, the impact of aerosols' physical properties on Rzecin fen (north-west Poland) ecosystem production was studied within the presented study. There were both radiative transfer and ecosystem productivity models were applied in order to assess the impact of the presence of various types of aerosols in the atmosphere on gross ecosystem production (GEP). It was found that changes in the physical parameters of atmospheric aerosols either reduce or increase the amount of studied fen CO₂absorption by -6.0% and +8.2%, respectively. This research is critical for the global carbon balance since peatlands in general are the second largest reservoir of organic carbon in the biosphere and still have the ability to absorb CO₂ from the atmosphere.