El Nino La Nina
El Nino La NinaAs the easterly trade winds decrease, the western Pacific's warm water flows toward the Americas. This giant mass of warm water flows over the colder water of the eastern Pacific. As this occurs, we get what is called El Nino, or the child. Its name ("the child") is derived from its arrival during the Christmas season. Typical weather patterns of El Nino include an increase in surface temperatures as well as an increase in cloud cover over the equator. Also, for unknown reasons, a large high pressure system is formed over Australia while a low pressure system is formed over the central Pacific. Because winds move out of a high and into a low, the clouds that were formed over the Equator, are blown easterly towards the western seaboard. Also, the Jet Stream is altered so that it blows directly over the Atlantic Ocean, thus dramatically decreasing hurricanes for that year.
But when the warm waters brought on by El Nino recede, the cold waters of the Pacific Ocean move eastward and bring with it La Nina, the little girl. La Nina has a variety of different names such as El Viejo, anti-El Nino or simply "cold event". When the warmer Pacific water is pushed westward by the trade winds, that water flows toward Asia and makes room for the colder, deep sea water, to rise and flow to the Americas. Because cold water doesn't evaporate, there is a large reduction in the formation of storm clouds. The weather patterns of La Nina are basically an exact opposite of El Nino. Strong high pressure systems form over the Pacific and low pressure systems are discovered over Australia. Westerly trade winds push the warm waters west. The once thick cloud cover over the equator is split. Because of the opposite pressure systems, the Jet Stream is severely distorted and Atlantic...
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