Fig. 5: The SMOPI effectively tracks regional features of the Sahelian monsoon rainfall.
From: The global Sahel monsoon ocean-pressure index reconciles its regional and large-scale features
Composite standardized anomalies–defined as dry years (weak SMOPI) minus climatology (first column) and wet years (strong SMOPI) minus climatology (second column)– of the zonal wind component (u-wind) are shown for JRA55 (a, b), ERA5 (c, d), MPI-ESM1-2-LR (e, f) and CMIP6 (g, h). Three key features of Sahel monsoon rainfall variability are consistently identified across datasets, although with different strength: the monsoon flows (blue), African Easterly Jet (AEJ, red) and Tropical Easterly Jet (TEJ, green). Contour lines denote the corresponding mean composite and highlight the vertical structure of the organized convective system.
