““classifying region being dominated by strong and persistent trade winds. These trade winds lead to equatorial upwelling through Ekman divergence at the surface, as well as to a generally strong westward surface current. Climatologically, both the upwelling and the westward current act to cool the local SST by advection of cooler waters (the zonal temperature gradient is generally negative, except during the most extreme of El Niño events). Westerly anomalies in this region would lead to””
