EVOLUTION PLUVIO - THERMIQUE DE 1950 A 2013 AU SENEGAL ORIENTAL: CAS DE LA REGION DE TAMBACOUNDA

This study aims to analyze climate change (1950-2013) in eastern Senegal through two parameters: temperatures and rainfall. Temperatures datas only date back to 1960. Data analysis indicates a downward trend in rainfall and rising temperatures. Like the West African countries, the rainfall recession of the 1970s and 1980s affected rainfall totals for all the countrys stations. The decline in rainfall since the late 1960s has continued until the 1980s with the disappearance of the regional isohyet 1000 mm between 1981 and 1990. This decline is also noted during the 1960s despite some exceptions of years wet. Most dates of serial rupture, according to Pettitts (1979) test, are noted during this period. Only the Bakel and Goudiry stations recorded respectively their rupture in 1993 and 1975. The years 1950, 2000 and 2010 turn out to be like the rainiest ones. Nevertheless, rainfall is not the only one to fluctuate. The results of the Pettitt test and standardized anomalies show an increase in temperature throughout the Tambacounda region since the second half of the 1980s despite the small difference between the northern (warmer) and the southern (less hot).