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

Correlating variablesAdjusting variablePartial correlation coefficient

Sahel precipitation-SAL PressureSOI0.66
Sahel precipitation-SAL PressureAZH longitude0.65
Sahel precipitation-SOISAL pressure0.09
Sahel precipitation-SOIAZH longitude0.38
Sahel precipitation-AZH LongitudeSAL pressure0.33
Sahel precipitation-AZH LongitudeSOI0.40