El Nino is a climate cycle where the temperature of the Pacific Ocean changes because of movements of air and ocean currents. During this period, the trade winds in the south weaken, causing the warm water to move from the Western region to the Eastern region.
El Nino climate cycle begins when warm water in the western tropical Pacific Ocean shifts eastward along the equator toward the coast of South America.
Opposite of El Nino is La Niña when the waters of the tropical eastern Pacific are colder than normal and trade winds blow strongly than usual.
