User:Johncena72

La Nina is global event characteristic with cold waters along the equator near the Peru coast of South America. La Nina is the little “girl” and El Nino is the little “boy.”La Nina is inversely related to El Nino, whereas El Nino is characteristic with unusually warm water along the equator reaching the north South American coast. La Nina usually follows an El Nino episode, but not all the time. La Nina durations are typically short ranging from 9 to 12 months compared to El Nino. Although La Nina has a life span to a year, El Nino can have a life span up to 2 or 3 years.

The affects of La Nina can be felt globally, and can cripple the economy. La Nina has been documented that it causes more economic impact than El Nino, because of the long term droughts, which can leave regions devastated. Although La Nina causes more economic impact on crops, El Nino can cause massive property damage. La Nina intensity usually reflects the strength of a previous El Nino, but not always.

Formation

La Nina is born when the easterly winds called as trade winds become stronger than normal. The stronger trade winds push the warmer water away from the South America coast and along the equator. These water currents that run parallel to the equator are called Kelvin Waves and the waves are affected by the presents of La Nina or El Nino. La Nina phenomenon is so great that it affects the sea level along the South American coast, which lowers the average sea level. However, it is very beneficial to the South American continent as La Nina provides strong upwelling currents. These upwelling currents pull up cold water beneath the ocean surface, and simultaneously increase the fishing industry. During El Nino years the warmer water causes the fishes to flee south for cooler water, which decrease the fishing industry.

Affects

La Nina affects during the winter across the US is usually typically followed by dry, mild winters in the west. Southern half of the United States usually experience dry, mild winters while the northern US receives cool and above precipitation. The summers are rarely affected by La Nina, but the Atlantic hurricane season is strong affected by La Nina. La Nina usually cause active hurricane seasons because the jet stream is pushed further north allowing a breeding ground. El Nino is the opposite as it pulls the jet stream south blowing tops off from hurricanes. Australia during a La Nina year suffers destructive floods and all of Southeast Asia remains cool and wet.

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