Long-term reconstruction of Solar UV indices

Solar radiation is one of the major natural drivers of Earth climate variations. UV radiation in particular plays a major role in the ozone production/destruction processes and is known to affect the Earth's global circulation patterns. We present reconstructions of the FUV-MUV color index and CaII and MgII core-to-wing indices from 1749 to 2015, performed with a 4-components semi-empirical approach . Our model makes use of the Sunspot Number to estimate the UV color index and facula, network and sunspot area. The reconstructed UV indices, as well as the estimated area of magnetic structures, well compare with modern observations and historical records.