Improving solar ultraviolet irradiance measurements by applying a temperature correction method for Teflon diffusers

摘要: To establish trends in surface ultraviolet radiation levels, accurate and stable long-term measurements are required. The accuracy level of today's has become high enough to notice even smaller effects that influence instrument sensitivity. Laboratory the sensitivity entrance optics have shown a decrease as much 0.07-0.1%/deg temperature increase. Since can heat greater than 45 degrees C Dutch summers, corrections necessary. A method is developed estimate temperatures from pyranometer meteorological data. enables us correct historic data records for which information not available. retrieval an uncertainty less 2.5 C, resulting 0.3% correction be performed. improves agreement between modeled measured doses intercomparison performed within Quality Assurance Spectral Ultraviolet Measurements Europe project. easily transferable other instruments.