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Characterization of climate variability in the North Central region of Burkina Faso from 1961 to 2015 This study aims to characterize climate variability in the North Central region of Burkina Faso. The economy of this region is particularly vulnerable to climate change. The daily rainfall data of eleven stations of this area and covering the period 1961-2015 were used. The Standardized Precipitation Index was performed to determine dry and wet periods. Statistical tests were applied to analyze rainfall variability. The ETCCDMI indices were used to characterize extremes rainfall. The results show that the period 1961-2015 is characterized by an alternating of wet and dry phases with a decline in the annual precipitation trend. A modification in the rainfall pattern is noted in this area since the end 1960s. This change led to a decrease of rainfall amount and daily rainfall regime. However, regional rainfall progressively recorded wetter years since the end 1980s and the 1990s and 2000s. This recovery is significantly in the sahelian zone than the sudano-sahelian zone. This study indicates a strong spatial disparity in the distribution of the rainy days during these decades in this zone. Indeed, annual rainy days number increased in five localities while decreasing is observed in the six other localities. The frequency of 50 Caractérisation de la variabilité climatique dans la région du Centre-Nord du Burkina Faso entre 1961 et 2015 83 mm rains, intense rain and extremes rain are increasing since the end of 1980s and the 1990s and 2000s. Rainfall recovery in the North Central region is strongly linked to high intensity rainfall events. Despite this evolution, drought is persisting in this area especially in Kongoussi since 2005 and 2010 for Bouroum.

Caractérisation de la variabilité climatique dans la region du centre-nord du burkina faso entre 1961 et 2015