Comparative Study of Satellite Precipitation and Synoptic Observations in the Republic of Guinea

This research work involves a comparative study of satellite rainfall and synoptic observations in the Republic of Guinea over a 30-year period. The methodology used consists, firstly, in assessing rainfall trends over the study period in Guinea’s four natural regions, using the temporal averages of the three stations located in each region. Secondly, we calculated the correlations between synoptic and satellite observation data, in order to determine the links between them on the basis of data analysis. The results for synoptic stations on average seasonal rainfall cycles and satellite products show that in Lower Guinea, the CRU (Climatic Research Unit) and GPCC (Global Precipitation Climatology Center) data are good estimates of observations. In the Fouta Djallon region, they also estimate observations well, but at two synoptic stations, with the exception of Mamou, they underestimate them. In Upper Guinea, during the monsoon period, satellites give a good estimate of rainfall in this area. In the forest region, these products show highly variable behavior, sometimes underestimating and sometimes overestimating observations, depending on the stations in the zone.