撒哈拉沙漠以南的大部分干旱地区，尤其是Sahel（该地区就在撒哈拉沙漠南面 ） ， 过去25年的降雨量已经明显下滑。
Much of arid sub-Saharan Africa, notably in the Sahel (the region just south of the Sahara desert), has experienced a pronounced drop in rainfall over the past quarter-century.