Articles | Volume 15, issue 5
https://doi.org/10.5194/amt-15-1171-2022
https://doi.org/10.5194/amt-15-1171-2022
Research article
 | 
07 Mar 2022
Research article |  | 07 Mar 2022

Aerosol optical characteristics in the urban area of Rome, Italy, and their impact on the UV index

Monica Campanelli, Henri Diémoz, Anna Maria Siani, Alcide di Sarra, Anna Maria Iannarelli, Rei Kudo, Gabriele Fasano, Giampietro Casasanta, Luca Tofful, Marco Cacciani, Paolo Sanò, and Stefano Dietrich

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The aerosol optical depth (AOD) characteristics in an urban area of Rome were retrieved over a period of 11 years (2010–2020) to determine, for the first time, their effect on the incoming ultraviolet (UV) solar radiation. The surface forcing efficiency shows that the AOD is the primary parameter affecting the surface irradiance in Rome, and it is found to be greater for smaller zenith angles and for larger and more absorbing particles in the UV range (such as, e.g., mineral dust).