Ramarohetra Johanna auteur aut IRD Sultan Benjamin auteur aut IRD Baron C. auteur aut IRD Gaiser T. auteur aut IRD Gosset Marielle auteur aut IRD text journalArticle eng text/pdf born digital access Rainfall monitoring via satellite sensors is particularly relevant for the agricultural sector of West Africa. Indeed, food shortages in this region are often caused by rainfall deficits and an early access to data available for the entire region can help to provide credible and timely information for better decision making. This study assesses the accuracy of state-of-the-art satellite rainfall retrievals for agriculture applications in two sites in Niger and Benin. Although these satellite data are widely used instead of rain gauge data for such applications, we found that, in a crop-modelling framework, their use can introduce large biases in crop yield simulations. Biases differ strongly among the four cultivars considered in both sites and are not simple extrapolation of each satellite product cumulative rainfall amount biases. In particular, we found that if an accurate estimation of the annual cumulative rainfall amount is important for yield simulations of pearl millet 'Souna 3' and 'Somno' cultivars in Niger, a realistic distribution of rainfall is also very important for predicting pearl millet 'Somno' and 'HK' yields in Niger as well as maize yields in Benin. Overall the satellite products tested, 3B42v6 appears to be the most suitable satellite product for our specific agricultural application since it minimizes both biases in rainfall distribution and in annual cumulative rainfall amount. For each crop and in both regions, biases in crop yield prediction are the highest when using non-calibrated satellite rainfall products (PERSIANN, 3B42RT, CMORPH and GSMAP). specialized West Africa Agriculture Rainfall Satellite Crop yield AFRIQUE DE L'OUEST 072 126 180 118-131 2013 0168-1923 https://www.documentation.ird.fr/hor/fdi:010061147 10.1016/j.agrformet.2013.05.010 0168-1923 [F B010061147] https://www.documentation.ird.fr/hor/fdi:010061147 https://www.documentation.ird.fr/intranet/publi/2013/10/010061147.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2013-11-04 2017-08-23 fdi:010061147 fre