M. F. Holick, Chapter 2-A perspective on the beneficial effects of moderate exposure to sunlight: Bone health, cancer prevention, mental health and well-being, Compr. Series Photosciences, vol.3, pp.13-37, 2001.

R. P. Gallagher and T. K. Lee, Adverse effects of ultraviolet radiation: A brief review, Biophys. Mol. Biol, vol.92, pp.119-131, 2016.

B. K. Armstrong and A. Kricker, How much melanoma is caused by sun exposure?, Melanoma Res, vol.3, pp.395-401, 1993.

M. Albert and K. Ostheimer, The evolution of current medical and popular attitudes toward ultraviolet light exposure: Part 3, J. Am. Acad. Dermatol, vol.3, pp.1096-1106, 2003.

, International Commission on Non-Ionizing Radiation Protection. Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm, Health Phys, vol.86, pp.171-186, 2004.

J. B. Kerr and V. E. Fioletov, Surface ultraviolet radiation, Atmos. Ocean, vol.46, pp.159-184, 2008.

V. Fioletov, J. B. Kerr, and A. Fergusson, The UV Index: Definition, Distribution and Factors Affecting it, Can. J. Public Health, vol.101, pp.15-19, 2010.

U. V. Oms.-l'indice-universel-de-rayonnement and . Solaire, , p.17, 2020.

G. Bernhard and G. Seckmeyer, Uncertainty of measurements of spectral solar UV irradiance, J. Geophys. Res. Atmos, vol.104, pp.14321-14345, 1999.

J. Cadet, H. Bencherif, D. J. Du-preez, T. Portafaix, N. Sultant-bichat et al., Solar UV radiation in
URL : https://hal.archives-ouvertes.fr/hal-01974396

C. Brogniez, F. Auriol, C. Deroo, A. Arola, J. Kujanpää et al., Validation of satellite-based noontime UVI with NDACC ground-based instruments: Influence of topography, environment and satellite overpass time, Atmos. Chem. Phys, vol.16, pp.15049-15074, 2016.

I. Fountoulakis and H. Diémoz, From Measurements to Data Analysis; VII Convegno Nazionale Agenti Fisici, 2019.

A. F. Bais, B. G. Gardiner, H. Slaper, M. Blumthaler, G. Bernhard et al., SUSPEN inter-comparison of ultraviolet spectroradiometers, J. Geophys. Res. Atmos, vol.106, pp.12509-12525, 2001.

M. Houët, U. V. Spectroradiométrie-du-rayonnement-solaire, and S. Au, Améliorations Apportées à L'instrumentation et au Traitement des Mesures, Analyse pour L'évaluation du Contenu Atmosphérique en Ozone et en Aérosols, 2003.

I. S. Joint, CIE Standard 17166: 1999/CIE S007-1998 Erythema Reference Action Spectrum and Standard Erythema Dose, vol.ISO, 1999.

A. F. Bais, M. Blumthaler, J. Gröbner, G. Seckmeyer, A. R. Webb et al., Quality Assurance of spectral ultraviolet measurements in Europe through the development of a transportable unit (QASUME). Ultrav. Ground-Space-Based Meas, Models Effects II, vol.4896, pp.232-238, 2003.

G. Hülsen and J. Gröbner, Protocol of the Inter-Comparison at Université de La Réunion, with the Travelling Reference Spectroradiometer QASUME. PMOD/WRC, vol.17, p.17, 2013.

K. Lamy, T. Portafaix, C. Brogniez, S. Godin-beekmann, H. Bencherif et al., Ultraviolet radiation modelling from ground-based and satellite measurements on Reunion Island, southern tropics, Atmos. Chem. Phys, vol.18, pp.227-246, 2018.
URL : https://hal.archives-ouvertes.fr/hal-01575229

J. Gröbner, G. Hülsen, L. Vuilleumier, M. Blumthaler, J. M. Vilaplana et al., Report of the PMOD/WRC-COST Calibration and Inter-Comparison of Erythemal radiometers, p.17, 2006.

G. Hülsen, J. Gröbner, U. Filter-radiometer-comparison, and . Pmod/wrc, , p.17, 2017.

A. Webb, J. Gröbner, and M. Blumthaler, A Practical Guide to Operating Broadband Instruments Measuring Erythemally Weighted Irradiance, vol.22595, 2006.

K. Lamy, T. Portafaix, J. Forestier, S. Rakotoniaina, and V. Amélie, Réseau UV-Indien-Premiers Résultats. Meeting Geosciences, Resources; Risques, 2019.

G. Seckmeyer, A. Bernhard, M. Blumthaler, C. Booth, K. Lantz et al., Instruments to Measure Solar Ultraviolet Radiation. Part 2: Broadband Instruments Measuring Erythemally Weighted Solar Irradiance, World Meteorological Organization, 2005.

O. Liandrat, S. Cros, A. Braun, L. Saint-antonin, J. Decroix et al., Cloud cover forecast from a ground-based all sky infrared thermal camera

L. Breiman, Random forests, Mach. Learn, vol.45, pp.5-32, 2001.

C. Long, J. Sabburg, J. Calbo, and D. Pages, Retrieving cloud characteristics from ground-based daytime colour all-sky images, J. Atmos. Ocean. Technol, vol.23, pp.633-652, 2006.

S. Madronich, UV Radiation in the Natural and Perturbed Atmosphere, 1993.

K. Stamnes, S. Tsay, W. Wiscombe, and K. Jayaweera, Numerically stable algorithm for discrete-ordinatemethod radiative transfer in multiple scattering and emitting layered media, Appl. Opt, vol.27, pp.2502-2509, 1988.

T. Takemura, T. Nakajima, O. Dubovik, B. N. Holben, and S. Kinne, Single-scattering albedo and radiative forcing of various aerosol species with a global three-dimensional model, J. Clim, vol.15, pp.333-352, 2002.

C. Lacagnina, O. P. Hasekamp, H. Bian, G. Curci, G. Myhre et al., Aerosol single-scattering albedo over the global oceans: Comparing PARASOL retrievals with AERONET, OMI, and AeroCom models estimates, J. Geophys. Res. Atmos, vol.120, pp.9814-9836, 2015.

M. R. Dobber, R. Voors, R. J. Dirksen, Q. Kleipool, and P. F. Levelt, The high-resolution solar reference spectrum between 250 and 550 nm and its application to measurements with the ozone monitoring instrument, Solar Phys, vol.249, pp.281-291, 2008.

R. D. Mcpeters, G. J. Labow, and . Climatology, An MLS and sonde-derived ozone climatology for satellite retrieval algorithms, J. Geophys. Res. Atmos, vol.117, 2011.

O. Dubovik, A. Smirnov, B. N. Holben, M. D. King, Y. J. Kaufman et al., Slutsker, I. Accuracy assessments of aerosol optical properties retrieved from Aerosol Robotic Network (AERONET) Sun and sky radiance measurements, J. Geophys. Res. Atmos, vol.105, pp.9791-9806, 2000.

M. D. Corrëa, S. Godin-beekmann, M. Haeffelin, S. Bekki, P. Saiag et al., Projected changes in clear-sky erythemal and vitamin D effective UV doses for Europe over the period 2006 to 2100, Photochem. Photobiol. Sci, vol.12, pp.1053-1064, 2013.

R. B. Koelemeijer, J. F. De-haan, and P. Stammes, A database of spectral surface reflectivity in the range 335-772 nm derived from 5.5 years of GOME observations, J. Geophys. Res. Atmos, vol.108, 2003.

P. Koepke, A. Bais, D. Balis, M. Buchwitz, H. De-backer et al., Comparison of models used for UV index calculations, Photochem. Photobiol, vol.67, pp.657-662, 1998.

G. E. Bodeker and R. L. Mckenzie, An Algorithm for Inferring Surface UV Irradiance Including Cloud Effects, J. Appl. Meteorol, vol.35, pp.1860-1877, 1996.

M. L. Barnes, T. Miura, and T. W. Giambelluca, An assessment of Diurnal and seasonal Cloud Cover Changes over the Hawaiian Islands Using Terra and Aqua MODIS, J. Clim, vol.29, pp.77-90, 2016.

G. Jumeaux and H. Quetelard,

. Météo-france, Direction Interrégionale de la Réunion: Sainte-Clotilde, 2002.

B. Cadet, L. Goldfarb, D. Faduilhe, S. Baldy, A. Réchou et al., A sub-tropical cirrus clouds climatology from Reunion Island (21S, 55E) lidar data set, Geophys. Res. Lett, vol.30, 1130.
URL : https://hal.archives-ouvertes.fr/hal-00820946

A. Cede, M. Blumthaler, E. Luccini, R. D. Piacentini, and L. Nuñez, Effects of clouds on erythemal and total irradiance as derived from data of the Argentine network, Geophys. Res. Lett, vol.29, pp.76-77, 2002.

J. M. Vilaplana, A. Serrano, M. Anton, M. L. Cancillo, M. Parias et al., Report of the "El Arenosillo"/INTA-COST Calibration and Inter-Comparison Campaign of UVER Broadband Radiometers

E. Arenosillo, This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license, Licensee MDPI, 2007.