Keywords: Sahel rainfall timeseries en.svg validSVG en More than a century of rainfall data in the Sahel show an unusually wet period from 1950 until 1970 positive index values followed by extremely dry years from 1970 to 1990 negative index values From 1990 until present rainfall returned to levels slightly below the 1898 “1993 average but year-to-year variability was high Own work based on http //jisao washington edu/ JISAO http //jisao washington edu/data_sets/sahel/ data Benedikt Seidl 2008-06-28 Image Sahel rainfall timeseries gif Image Sahel rainfall timeseries de svg Sahel z Climate diagrams of Africa Precipitation diagrams SVG charts in English |