Image caption
One of the puzzling things about the potential Atlantic Niña event is that the winds have not been especially favorable for upwelling across the key monitoring region (black box). This summer, the area has experienced an unusual northwesterly influence (gray arrows) that has weakened the normal southeasterly trade winds that favor upwelling of cool, deep water at the equator. NOAA Climate.gov image, adapted from original by Franz Philip Tuchen.