The Sahelian drought may have ended during the 1990s

摘要: The severe drought that affects the Sahel since late 1960s has been very closely studied and monitored during last three decades. Recently, after several wet years, it was questioned from a statistical point of view whether over. conclusions recent study were rainfall deficit not over at end 2000 continues. analysis change points in station time series suggests differentiating these findings. There is now growing evidence there potential shift towards more humid state. However, present shows assumption significant increase may have occurred around early 1990s could only be verified customary confidence level about 10 years now.