Diachronic analysis of the evolution of climatic parameters and land use in Kintignan - Siguiri (Republic of Guinea)

climatic

This study is part of a logical continuation of several studies carried out in the Republic of Guinea on environmental challenges; climatic conditions coupled with the anthropogenic activities carried out by the Guinean populations on the natural heritage. This study area, located in the sub-prefecture of Kintignan, Prefecture of Siguiri, constitutes an economic lever with regard to economic activities, in particular the exploitation of gold practiced by more than 90% of the local population as well as others from the four regions of Guinea and neighboring countries. The approach consisted of an analysis of monthly data averaged for an accumulation period of one day on a special resolution 0.25°X0.25 or 25km X 25km of the climatic parameters (temperature and precipitation) from the Siguiri meteorological stations of on the one hand and high resolution European reanalysis data of the 5th generation (ERA5) from the European Center for Medium-Range Weather Forecasts (ECMWF) on the other hand. Satellite data (Sentinel2 and Landsat) from the years 2000 and 2019, 10-meter resolution as well as data from field visits were used in this present work for the analysis of changes. Precipitation and temperature status maps were produced using ERAS data with results displayed graphically over the period from 1980 to 2020. These results were calculated using annual precipitation totals and the annual averages of the mean air temperature at 2m were also calculated on each grid point from E1 and E2 respectively. Added to this are the simple anomalies (AS) for the annual averages of the mean temperature. Standardized Precipitation Index (SPI) to quantify precipitation deficit.

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