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The Effect of Atmospheric Variability in Measured Spectral Ultraviolet Radiation in Athens, Greece, During the ASPIRE Campaign
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The Effect of Atmospheric Variability in Measured Spectral Ultraviolet Radiation in Athens, Greece, During the ASPIRE Campaign
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Journal Article
The Effect of Atmospheric Variability in Measured Spectral Ultraviolet Radiation in Athens, Greece, During the ASPIRE Campaign
2025
Overview
Accurate ultraviolet (UV) radiation monitoring is crucial for health, environmental applications, as well as for optimizing modelling techniques and predictions. However, understanding the interactions between UV radiation and atmospheric components like clouds and aerosols remains complex due to their diverse properties and impacts. Amongst them, ozone, the primary regulator of UV-B irradiance, has shown no significant trends in Athens over 16 years, but the impacts of aerosols and clouds are less established. The present study aims to link the aforementioned aspects under different atmospheric composition cases with solar UV radiation from retrievals gathered during the one-year ASPIRE (Atmospheric parameters affecting SPectral solar IRradiance and solar Energy) campaign in Athens, starting in December 2020. The study integrates ground-based measurements and Radiative Transfer (RT) simulations in order to examine daily datasets and assess the combined effects on UV radiation at ground level, including investigating the enhancement of radiation caused by the presence of clouds, which is explored through a specific case study. The analysis of the case study reveals a higher enhancement in PAR (Photosynthetically Active Radiation) than in UVI (Ultraviolet Index) under broken cloud conditions, while most of the enhancement cases linked to clouds were observed in PAR compared to UV radiation.
Publisher
IOP Publishing
