Observed Change in Sahel Rainfall, Circulations, African Easterly Waves, and Atlantic Hurricanes Since 1979

Figure 1

July-August precipitation differences between the periods 1995–2009 and 1979–1994, from the University of Delaware data over land and the GPCP data over ocean. Jet cores along the African Easterly Jet and the Tropical Easterly Jet are indicated. The tropical monsoon westerly lies underneath the TEJ. The left bracket in red outlines the latitude zone used in Figures 2–6.