El Nini

Topics: Ocean, Atmospheric pressure, Climate Pages: 1 (401 words) Published: May 19, 2013
El Niño
El Niño is a disruption of the ocean-atmosphere system in the Tropical Pacific that directly affects weather and climate around the globe. El Niño is a climate pattern that occurs in the tropical Pacific Ocean and brings warm air to areas that have colder air. El Niño involves warmer-than-usual sea temperatures, great amounts of rainfall (in the northern hemisphere) and low atmospheric pressure. El Niño is normally a climate pattern that lasts for a long time. The average life of an El Niño is 5 years. After 5 years there are sometimes El Niño conditions and that can last from 7 months to 2 years. Usually associated with warmer conditions El Niño rushes in warm and nutrient poor water to areas that thrive in colder and more nutrient rich water. El Niño’s events begin when trade winds, part of the Walker circulation start to become irregular for many months. The Walker circulation, which is the circulation of air flow in the tropics, is one of the early components that are needed to start the effects of El Niño. Some effects of the El Niño include rise in surface pressure, fall in air pressure, more rainfall in dry areas, and the spreading of warm water into colder areas. La Niña

La Niña is an ocean-atmosphere pattern, opposite of El Niño, who together form the El Niño-Southern Oscillation climate pattern. During a period of La Niña, the sea surface temperature across the Eastern Pacific Ocean will be lowered by 3–5 °C. In the United States, an episode of La Niña is defined as a period of at least 5 months of La Niña conditions. La Niña is also called the anti-El Niño because of its opposite effects than El Niño. Most effects of El Niño can be reversed to become a La Niña. In contrast to El Niño, La Niña has cooler sea temperatures, a high atmospheric pressure and drier During La Niña; currents bring nutrients up from the deep water, instead of taking them away. Though in most cases, La Niña is a much more thriving type of a climate for...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • El Nino Essay
  • El Cid Essay
  • El Filibusterismo Essay
  • El Dorado Essay
  • El Salvador Essay
  • El Fili Essay
  • El Cid Essay
  • Essay about El Dorado

Become a StudyMode Member

Sign Up - It's Free