El nino is the transliteration of Spain, this is South America's Pacific coast fishermen to the end of each year water temperature rise in seasonal phenomenon, because of the weather phenomenon appeared often around Christmas time, just got this name, but now scientists are said: only those warming severe year known as el nino, because only warms up sharp Causing huge ecological changes and a series of disasters around the world.
According to the above information about El Nino, the statement "This phenomenon occurs every year" is not true.