El Nino and La Nina

El Nino and La Nina are opposite phases of ENSO (El Nino Southern Oscillation), a coupled ocean-atmosphere oscillation in the Tropical Pacific Ocean that exerts an influence on weather throughout much of the world. Being an oscillation, it moves between these two phases every few years, triggered initially by changes in the atmospheric circulation with ocean temperature changes following. It is measured by the Southern Oscillation Index, which compares surface pressures at Tahiti and Darwin, Australia.

1,894 Questions
Meteorology and Weather
Peru
Oceans and Seas
El Nino and La Nina

How does El Nino affect Peru's coast and Northeastern Brazil differently?

the storm causes masive flooding

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Meteorology and Weather
Rain and Flooding
Pacific Ocean
El Nino and La Nina

What is El Nino and how is it caused?

El Nino A warming of the ocean surface off the western coast of South America that occurs every 4 to 7 years when upwelling of cold, nutrient-rich water does not occur. It causes die-offs of plankton and fish and affects Pacific jet stream winds, altering storm tracks and creating unusual weather patterns in various parts of the world.

[American Spanish, from Spanish, the Christ child (from its onset being around Christmastide) : el, the (from Latin ille) + niño, child (from Old Spanish ninno, from Vulgar Latin *nīnnus).]

An El Nino event results from weakened trade winds in the western Pacific Ocean near Indonesia, allowing piled-up warm water to flow toward South America.

The deeper, warmer water in the east limits the amount of nutrient-rich deep water normally surfaced by the upwelling process. Since fish can no longer access this rich food source, many of them die off. This is why these conditions are called "El Nino", or "the Christ Child", which is what Peruvian fisherman call the particularly bad fishing period around December. More importantly, the different water temperatures tend to change the weather of the region.

What happens to the ocean also affects the atmosphere. Tropical thunderstorms are fueled by hot, humid air over the oceans. The hotter the air, the stronger and bigger the thunderstorms. As the Pacific's warmest water spreads eastward, the biggest thunderstorms move with it. If you look on a map, you will see that suddenly islands like Tahiti, normally tropical paradises, experience massive storms.

Currently, it is not well understood what initiates these changes, and it is likely that it is a large combination of things. The current thinking is that it has to do with oscillations such as the Madden-Julian Oscillation in the tropical Pacific, Atmospheric Angular Momentum, and frictional and mountain torque.

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Meteorology and Weather
Rain and Flooding
El Nino and La Nina

What is El Nino and what are its effects?

El Nino A warming of the ocean surface off the western coast of South America that occurs every 2 to 7 years when upwelling of cold, nutrient-rich water does not occur. It causes die-offs of plankton and fish and affects Pacific jet stream winds, altering storm tracks and creating unusual weather patterns in various parts of the world.

[American Spanish, from Spanish, the Christ child (from its onset being around Christmastide) : el, the (from Latin ille) + niño, child (from Old Spanish ninno, from Vulgar Latin *nīnnus).]

El Nino occurs when weakening trade winds (which sometimes even reverse direction) allow the warmer water from the western Pacific to flow toward the east. This flattens out the sea level, builds up warm surface water off the coast of South America, and increases the temperature of the water in the eastern Pacific.

El Nino can have impacts on weather at various locations around the globe. Off the east coast of southern Africa, drought conditions often occur. In countries such as Zimbabwe, the effects of drought can be devastating.

The clouds and rain associated with warm ocean waters also shift toward the east. Thus, rains which normally would fall over the tropical rain forests of Indonesia start falling over the deserts of Peru, causing forest fires and drought in the western Pacific and flooding in South America. Moreover the Earth's atmosphere reponds to the heating of El-Nino by producing patterns of high and low pressure which can have a profound impact on weather far away from the equatorial Pacific. For instance, higher temperatures in western Canada and the upper plains of the United States, colder temperatures in the southern United States. Enhanced precipitation, particularly in the winter occurs from coastal California through the southern United States and across much of the East Coast.

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Meteorology and Weather
El Nino and La Nina

What is happening to el nino this year?

2010 began as a moderate El Nino and is expected to transition into a moderate La Nina by the second half of the year.

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Environmental Issues
El Nino and La Nina

How does el Nina affect people?

it's el niño and la niña - essentially the reverse phenomena

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El Nino and La Nina

What happens during la Niña?

Heavy rain pours.

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El Nino and La Nina

How did ocean phenomenon 'el nino' get its name?

El Nino means boy child in Spanish. It also refers to the Baby Jesus.

Since the weather pattern El Nino often occurs around Christmas time, people started to call it by that name.

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El Nino and La Nina

What happens during an El Niño?

El Niño is a weather phenomena which tends to occur in tropical waters of the Pacific Ocean. It affects the region across the Pacific from New Guinea to South America. During an El Niño season, which occurs on average every 2 - 7 years, a shift in ocean currents and winds brings warm water in a westerly direction, displacing the usual cold water that comes up from the ocean depths. As well as affecting marine life, the El Niño has an effect on weather patterns.

Under normal conditions, in the tropics warm oceans tend to be accompanied by heavy rains, resulting in heavy rains in the warm west Pacific while the cooler east Pacific receives far less rainfall. This is reversed during an El Niño, when the ocean temperature gradient from one side of the Pacific to the other weakens. Warmer than usual ocean temperatures cause droughts in the west (e.g. Australia), while the unusually warm eastern waters bring heavy rains and floods to the Pacific coast of South America, which is usually much drier.

It's all a matter of interactions between the oceans and the atmosphere. Changes in sea surface temperatures causes a shift in air pressure which, in turn, can result in climatic anomalies, such as severe droughts, flooding and even cyclones. One of the effects is that the normal circulation patterns over the Pacific are disrupted, and moisture-bearing trade winds weaken, whilst drier westerlies increase.

El Niño has a number of effects, beyond causing droughts and floods on opposite sides of the Pacific. It causes die-offs of plankton and fish and affects Pacific jet stream winds, altering storm tracks and creating unusual weather patterns in various parts of the world. Scientific investigations of this phenomenon are ongoing, and it is yet to be determined whether El Niño's primary forcing is oceanic or atmospheric.

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Meteorology and Weather
Rain and Flooding
El Nino and La Nina

How does El Nino affect climates around the world?

El Nino effects two major countries; Australia and South Amercia.

In Australia, The 'El Nino Effect" causes drought, lack of water, dry season.

In South Amercia, it causes the COMPLETE opposite. It causes flash flooding, lots of rain, and causes the collapse of the 'Peruvian Fishing Industry' - which is the main fishing industry in South America.

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Meteorology and Weather
Rain and Flooding
El Nino and La Nina

How will an el nino affect Jacksonville fl?

Increased chance for snow and lower tides

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Meteorology and Weather
Rain and Flooding
El Nino and La Nina

How often does El Nino occur and what does it affect?

I do not know how often it happens but i don know that it effects coral and the fish or other sea animals that inside and among it. The way it Effects the coral is by coral bleaching. When water temp. gets above about 70 to 75 degrees the coral goes into "survival mode". The zooxanthellea that live inside the coral produce toxins, therefore the coral must kick its mian source of food out of its boy starving istelf to death.

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El Nino and La Nina

Which is expected to happen during El Niño?

The pressure gradient decreases.

Drought conditions in Australia.

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Climatology and Climate Changes
El Nino and La Nina

How does La Niña affect the earth?

Indonesia may have unusually high rainfall.

South America becomes drier than normal.

717273
Meteorology and Weather
Rain and Flooding
El Nino and La Nina

What is El Niño?

El Niño is a weather phenomena which tends to occur primarily in tropical waters of the Pacific Ocean. It affects the region across the Pacific from New Guinea to South America. During an El Niño season, which occurs on average every 2-7 years, a shift in ocean currents and winds brings warm water in a westerly direction, displacing the usual cold water that comes up from the ocean depths. As well as affecting marine life, the El Niño has an effect on weather patterns.

Under normal conditions, in the tropics warm oceans tend to be accompanied by heavy rains, resulting in heavy rains in the warm west Pacific while the cooler east Pacific receives far less rainfall. This is reversed during an El Niño, when the ocean temperature gradient from one side of the Pacific to the other weakens. Warmer than usual ocean temperatures cause droughts in the west, while the unusually warm eastern waters bring heavy rains and floods to the Pacific coast of South America, which is usually much drier.

It's all a matter of interactions between the oceans and the atmosphere. Changes in sea surface temperatures causes a shift in air pressure which, in turn, can result in climatic anomalies, such as severe droughts, flooding and even cyclones. One of the effects is that the normal circulation patterns over the Pacific are disrupted, and moisture-bearing trade winds weaken, whilst drier westerlies increase.

El Niño has a number of effects, beyond causing droughts and floods on opposite sides of the Pacific. It causes die-offs of plankton and fish and affects Pacific jet stream winds, altering storm tracks and creating unusual weather patterns in various parts of the world. Scientific investigations of this phenomenon are ongoing, and it is yet to be determined whether El Niño is oceanic or atmospheric.

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El Nino and La Nina

How do you spell the plural form of El Nino?

Los ninos

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Meteorology and Weather
Rain and Flooding
El Nino and La Nina

What are two changes in weather patterns caused by el nino that can cause disasters?

Floods, mudslides, drought, and also some changes in upwelling. I know that's four but it gives more of a variety... :) hope I helped!

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El Nino and La Nina

What countries most effect of la Nina?

austrlia and countries on the west coast of s.america

616263
Meteorology and Weather
Peru
Pacific Ocean
El Nino and La Nina

What do you do during an 'El Niño'?

Evacuate or Stay in a safe, dry place may be choice actions during an 'El Niño' extreme event. The phrase refers to an unusual warming of temperatures in the eastern tropical Pacific Ocean. The event may be accompanied by greater rainfall. So there may be flooding and thunderstorms.

It's important to travel as little as possible. If travel is allowed and necessary, voyagers need to have access to informational radio broadcasts. They need to have dependable forms of communication, such as working cell phones. They need to have updated maps, and medical and survival supplies in the vehicle.

The same holds true in terms of the particular form of shelter, be it one's own home or elsewhere. It's best to keep current on weather advisories. It's important to make sure that family and friends know one's location. And it's important to stay dry, safe and warm.

616263
Plumbing
El Nino and La Nina

Why would a well cough and sputter every 6 minutes but always have a lot of water available?

my dad was a well driller, and that sounds to me like air in the pipes, I can remember him going to the well house and on the pump there should be a valve that will let you drain it of the air before it gets to the pipes, hope this will help you.

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El Nino and La Nina

Can el nino de la tierra kill people?

no they can not, but they do bite which is really painful. Some myths say they do kill people but in reality they are not poisonous.

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Science
Earth Sciences
El Nino and La Nina

What is the relationship between ocean circulation patterns and atmospheric circulation?

The cirrculation in the subject of science, is where you blood is currculing around your body. Your Veins Take the Blood in to your heart and the arteries take the blood away from the heart( Arteries=Away)

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Climatology and Climate Changes
El Nino and La Nina

What is an effect of La Niña?

Indonesia may have unusually high rainfall, and South America becomes drier than normal.

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Meteorology and Weather
Rain and Flooding
El Nino and La Nina

Where does el nino affect?

El Nino affects land masses east of the Pacific Ocean.

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Clouds
Snow and Ice
El Nino and La Nina

What are the highest types of clouds?

Noctilucent clouds are the highest and least understood.

Cirrus and cirrostratus are the high-type clouds. Any high cloud will have the prefix "cirr".

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Science
Butterflies and Moths
Caterpillars
El Nino and La Nina

What is the butterfly effect?

The phrase relates to chaos theory. It's one of those coined sound bites that reporters love because it sounds good, while not really contributing much accurate information (like "the information superhighway" being used to describe the internet). The more accurate name is "sensitive dependence on initial conditions". I can't remember the exact countries that the original example used, but the idea is that a storm could be caused off the coast of country xxx by something as small as a butterfly flapping its wings over country yyy weeks earlier, due to the unpredictability (i.e. chaos) and large number of variables involved in a planet's weather. An alternative way of looking at it is to imagine 2 planets with perfectly identical weather systems at a single moment. If you then introduced a butterfly for a single wingflap into just one of the planet's weather systems, this planet could experience a storm over country xxx a few weeks later as a result, where the other planet might not. That's where the "sensitive dependence on initial conditions" comes in.... :o)

In addition:The butterfly effect is simply:

If a butterfly flaps its wings in china, would it have an effect on the weather patterns in London? The obvious answer is no. But since every action has an effect on other probabilities... The result is infinite.

It is also a good movie.

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