Long term monitoring of the chemical composition of precipitation and wet deposition fluxes over three Sahelian savannas

► Analysis of quality controlled rain chemical data for three sahelian savannas in Africa. ► Characterization of mean precipitation chemistry composition for each chemical species. ► Characterization of mean deposition fluxes for each chemical species. ► Interannual and seasonal variability of concentrations and deposition. ► Focus on nitrogen deposition fluxes in Sahelian ecosystems.