Fig. 2

a, b Regression of observed (Obs) and Saudi-KAU model (Mod) SARI onto the respective 200-hPa velocity Potential (Chi200); c, d Regression of Niño3.4 onto the observed and Model Velocity Potential (Chi200) respectively for the Period 1981–2015. Units for velocity potential is 1.e⁺⁶ x m²/sec. The shaded regions are at 95% significance level