The main research interests include the transfer of solar ultraviolet (UV) radiation through the atmosphere, the physics and variations of stratospheric ozone and processes related to global change. Particular emphasis is given in processes related to the effects of different atmospheric variables, such as ozone, aerosols and clouds, on UV radiation, as well as in investigation of eco‐ system and health impacts of solar UV radiation changes. Experimental work includes monitor‐ ing of UV radiation, ozone, other trace gasses, and aerosol optical properties, as well as work on technology of instrumentation for these measurements, data management and QA/QC proce‐ dures. Emphasis in given also on the development and testing of calibration procedures for spec‐ tral, broadband, and narrowband solar radiation instruments. Modeling studies are focused on the interpretation, simulation and predictions of solar radiation changes, including solar energy.