Solar UV Irradiance in a Changing Climate: Trends in Europe and the Significance of Spectral Monitoring in Italy

摘要: Review of the existing bibliography shows that direction and magnitude long-term trends UV irradiance, their main drivers, vary significantly throughout Europe. Analysis total ozone spectral data recorded at four European stations during 1996–2017 reveals changes in are mainly driven by aerosols, cloudiness, surface albedo, while play a less significant role. The variability irradiance is large Italy due to complex topography latitudinal extension country. records urban site Rome, alpine Aosta differences between two sites follow annual cycle cloudiness albedo. Comparisons noon index measured ground same corresponding estimates from Deutscher Wetterdienst (DWD) forecast model monitoring instrument (OMI)/Aura observations reveal up 6 units individual measurements, which likely different spatial resolution datasets, average 0.5–1 unit, possibly related use climatological albedo aerosol optical properties retrieval algorithms.