Validity of satellite measurements used for the monitoring of UV radiation risk on health

摘要: In order to test the validity of ultraviolet index (UVI) satellite products and UVI model simulations for general public information, intercomparison involving three instruments (SCIAMACHY, OMI GOME-2), Chemistry Transport Model, Modelisation de la Chimie Atmospherique Grande Echelle (MOCAGE), ground-based was performed in 2008 2009. The highlighted a systematic high bias ~1 clear-sky compared SCIAMACHY TUV products. GOME-2 all-sky are close observations with low 6 % positive bias, comparable results found during validation campaigns. This result shows that well appropriate evaluate UV-risk on health. study has pointed out difficulty take into account either retrieval algorithms or models, large spatial temporal cloud modification effect UV radiation. factor is crucial provide good quality information. show realistic variability as function cover. Nevertheless these do not sufficiently radiation reflected by clouds. MOCAGE numerical forecasts periods covers, but actually adequate overcast conditions; this why Meteo-France currently uses human-expertised cloudiness (rather than direct outputs from Numerical Prediction Models) together indices its operational forecasts. From now on, monitoring could be done using free (OMI, GOME-2) forecast modelling, long parametrisation impact adequate.