Role of Aerosols on Atmospheric Circulation in Regional Climate Experiments over Europe

Aerosols can strongly influence atmospheric circulation, and categorizing it into circulation types (CTs) helps in understanding the relationship between forcing surface conditions. However, few studies have considered impact of interactive aerosols on dynamics from a climatic perspective. This contribution aims to assess whether simulations with (online solving aerosol–radiation interactions, ARI, aerosol–radiation–cloud ARCI) significantly over Europe during winter compared conventional regional climate models prescribed aerosols. For that, Principal Component Analysis (PCA) has been applied reduce dimensionality problem order cluster different weather patterns. Results showed significant differences two predominant patterns, characterized by western zonal flow (CT1) low-pressure system centered Italy (CT2). The ARI experiment revealed substantial reduction level pressure central-eastern for CT1, resulting southward shift flux direction, an increase Scandinavia CT2. ARCI exhibited similar, but weaker effect. Furthermore, study demonstrated frequency CTs concentration black white findings this emphasize role need further research uncertainty meteorological experiments, particularly context mitigating change.