The wind speed and direction, air temperature, relative humidity are measured with Campbell Scientific Instruments. Wind speed and wind direction are measured at 1Hz with a 2DWindSonic, temperature and relative humidity using 50Y or HMP50 sensors and rainfall with an ARG100 tipping bucket raingauge. The data acquisition is made using data loggers CR200. The meteorological data are recorded as 5 min averages. Meteorological measurements are made at ~ 10 m height in M’Bour (Senegal), ~ 6.5 m height in Banizoumbou ( Niger) and in Bambey (Senegal) and ~ 2.3 m height in Cinzana (Mali).