La Nina is when the surface temperature of the sea is cooler than normal (by about 3-5 degrees) in the central and eastern tropical Pacific waters. This causes a pressure gradient between the eastern and western pacific and when the difference between atmospheric pressure gets to a certain level, the resulting effect is called La Nina.
La Nina is a weather phenomena associated with cooler than normal temperatures in the Equatorial Pacific ocean, opposite to El Nino, where temperatures are warmer than normal. These effects are generally more pronounced during the Winter seasons.
La Niña (cold) Conditions (December 1998)
Normal Conditions December 1993
El Niño (warm) Conditions December 1997
La Niña is a weather phenonmenon caused by abnormally cold ocean temperatures in the Equatorial Pacific. It is the opposite of El Niño, which occurs when there are abnormally warm Equatorial Pacific waters. In the U.S., La Niña causes winter temperatures in the Southeast to be warmer than usual, and winter temperatures in the Northwest to be colder than usual. It may also cause strong winds and rainfall.
La Niña, and its counterpart El Niño, is a climate pattern with an irregular frequency. El Niño increases the surface temperature of the ocean at least half a degree celsius, and La Niña decreases the surface temperature by about three to five degrees celsius. The effects of this temperature change are not as small as it might seem, however. The recent catastrophic flooding in Queensland, Australia has been attributed to La Niña, just to give an example.
La Nina is when the surface temperature of the sea is cooler than normal (by about 3-5
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