Dear Colleagues,

Solar radiation, being the only source of energy received by the Earth, is a key issue for the survival of our planet, its environment, and for life on Earth. Solar radiation has a major impact on various phenomena, such as the energy balance of the Earth’s surface, photochemical reactions in the atmosphere, meteorological and climatic conditions, ocean circulation cycles, photosynthesis, and global warming. It impacts a large series of research domains, such as renewable energy solutions, local and global climatology, atmospheric chemistry and physics, agriculture, global warming, etc. It is, therefore, essential to have correct knowledge on extra-terrestrial global solar radiation, its spectral composition and its potential variations, and the obstacles for the penetration of these radiations to the ground level (pollution, aerosols, effect of clouds, etc.).

This Special Issue aims to review techniques for solar radiation measurements and modeling, including historical developments, technical comparisons, new instrumental design, solar radiation networks, recent measurements from space and at the ground level, new radiation transfer models, comparison of models and in situ measurements, and new statistical studies for predictive methods.

Comparison of the different methods of measurements and the different models should reduce uncertainties and provide better and more accurate knowledge of global solar radiation, its spectral components, and its direct diffuse and retro-diffuse components that are of major interest for researchers in alternative energy solutions, climatology, and agricultural issues.

Dr. Didier Gillotay
Guest Editor

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• UV measurements (ground based and from space)
• modelization
• impact on human health
• influence of meteological parameters
• prediction of UV index