The El Niño warm current is an abnormal natural phenomenon in the Pacific Ocean. A famous Peruvian cold current flows from south to north on the west coast of South America and the east of the South Pacific. From November to March of the following year, it is the summer in the southern hemisphere. The water temperature in the southern hemisphere has generally risen, and the equatorial warm current flowing westward has been strengthened. At this time, the global pressure and wind belts are moving southward, and the northeast trade wind across the equator is affected by the southern hemisphere self-deflection force (also called the geostrophic deflection force) and deflects to the left into the northwest monsoon. The northwest monsoon not only weakens the southeast trade wind, the offshore wind on the west coast of Peru, and weakens or even disappears the cold water of Peru, but also blows the warm equatorial current with higher water temperature southward, causing the water temperature of the cold Peru to rise abnormally. This quietly arriving and unfixed ocean current is called the "El Nino Current".
