ENERGY BUDGET OF THE SAHELIAN SURFACE-LAYER

This pape presents a synthesis of results obtained during different me asuring campaigns that were conducted in the Niamey area (Niger). Thes e campaigns concerned the study of the atmospheric boundary layer and the surface layer. This synthesis focuses on the measurement of the en ergy budget and related problems. The effect of dust haze on the clima tic parameters and on the energy budget components is shown and figure s as an original contribution in this work. The radiative contribution to the heat flux in the surface layer is also indicated. Finally, pra ctical conclusions are drawn concerning the generalization of fixed po int measurements from regional integration by means of airborne measur ements.