Table 3: Partial correlation analysis for the independent variables identified in Table 1.

Correlating variables Adjusting variable Partial correlation coefficient Sahel precipitation-SAL Pressure SOI −0.66 Sahel precipitation-SAL Pressure AZH longitude −0.65 Sahel precipitation-SOI SAL pressure 0.09 Sahel precipitation-SOI AZH longitude 0.38 Sahel precipitation-AZH Longitude SAL pressure −0.33 Sahel precipitation-AZH Longitude SOI −0.40