Fig. 7: Extent and sign of teleconnections within SMOPI at intraseasonal timescale.
From: The global Sahel monsoon ocean-pressure index reconciles its regional and large-scale features
a–d Heatmaps of Pearson correlation coefficients between large-scale climate teleconnections and SMOPI. The relationship between each teleconnection index and the Sahelian rainfall first principal component (PC1 Rainfall) is also shown to assess the consistency of SMOPI with established rainfall dynamics (i.e., except IOD, positive association with SMOPI leads to positive association with PC1 rainfall and vice versa). Results are presented for (a) JRA55, (b) ERA5, (c) MPI-ESM1-2-LR, and (d) the CMIP6 multi-model ensemble. e–l Temporal evolution of all teleconnection indices, displayed across datasets–JRA55 (blue), ERA5 (green), MPI-ESM1-2-LR (purple), and CMIP6 (red). (m) Temporal evolution of the newly developed SMOPI. (n) Temporal evolution of the first principal component of Sahelian rainfall (PC1 Rainfall).
