Assessment of the accuracy in UV index modelling using the UVIOS2 system during the UVC-III campaign

Fountoulakis, Ilias; Papachristopoulou, Kyriaki; Kazadzis, Stelios; Hülsen, Gregor; Gröbner, Julian; Raptis, Ioannis-Panagiotis; Kouklaki, Dimitra; Masoom, Akriti; Kouremeti, Natalia; Kontoes, Charalampos; Zerefos, Christos S.

doi:https://doi.org/10.5194/gmd-18-7451-2025

Articles | Volume 18, issue 20

https://doi.org/10.5194/gmd-18-7451-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-18-7451-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 20

Model evaluation paper

|

21 Oct 2025

Model evaluation paper |

| 21 Oct 2025

Assessment of the accuracy in UV index modelling using the UVIOS2 system during the UVC-III campaign

Ilias Fountoulakis, Kyriaki Papachristopoulou, Stelios Kazadzis, Gregor Hülsen, Julian Gröbner, Ioannis-Panagiotis Raptis, Dimitra Kouklaki, Akriti Masoom, Natalia Kouremeti, Charalampos Kontoes, and Christos S. Zerefos

Data sets

Data and code for "Assessment of the accuracy in UV index modelling using the UVIOS2 system during the UVC-III campaign'' I. Fountoulakis https://doi.org/10.5281/zenodo.16781118

Model code and software

Data and code for "Assessment of the accuracy in UV index modelling using the UVIOS2 system during the UVC-III campaign'' I. Fountoulakis https://doi.org/10.5281/zenodo.16781118

Short summary

The UVIOS2 model has been evaluated at Davos, Switzerland during the UVCIII campaign. The accuracy in the modelled UV indices has been assessed for different combinations of model inputs. A good overall agreement between UVIOS2 and the world reference spectroradiometer QASUME was found (average ratio of ~ 1 between the modelled and measured UV index), although the variability in the ratio can be large under cloudy conditions.