What does El Nino and La Nina mean?

What does El Nino and La Nina mean?

El Niño is a term for the warming phase of the El Niño Southern Oscillation (ENSO), a cyclical weather pattern that influences temperature and rainfall across the global. La Niña is the opposite – a cooling phase of ENSO that tends to have global climate impacts opposite to those of El Niño.

What is the difference between El Niño and La Niña?

El Niño events are associated with a warming of the central and eastern tropical Pacific, while La Niña events are the reverse, with a sustained cooling of these same areas. These changes in the Pacific Ocean and its overlying atmosphere occur in a cycle known as the El Niño–Southern Oscillation (ENSO).

What is El Nino and La Nina and what are the characteristics of each?

El Niño is characterized by a positive ONI greater than or equal to +0.5°C. La Niña is characterized by a negative ONI less than or equal to -0.5°C. Whenever the ONI is between +0.5 and -0.5, conditions are referred to as ENSO-neutral.

What causes La Niña and El Nino?

El Niño and La Niña result from interaction between the surface of the ocean and the atmosphere in the tropical Pacific. In turn, changes in the atmosphere impact the ocean temperatures and currents. The system oscillates between warm (El Niño) to neutral or cold (La Niña) conditions on average every 3-4 years.

Is La Niña wet or dry?

This means that rainfall in the northern tropics is typically above-average during the early part of the wet season for La Niña years but only slightly above average during the latter part of the wet season.

What does a La Niña winter mean?

Generally speaking, La Niña winters tend to be drier and warmer than normal across the southern U.S. and cooler and wetter in the northern U.S. and Canada. The Pacific Northwest, parts of the Midwest and the Tennessee and Ohio valleys can see more rain and snow than in a typical winter.

What does La Niña mean for South Africa?

La Niña results in wetter-than-normal conditions in Southern Africa from December to February, and drier-than-normal conditions over equatorial East Africa over the same period.

Is it La Niña or El Niño 2021?

There’s an 87% chance of La Niña this winter, the season when North American weather and climate are most affected by ENSO (El Niño/Southern Oscillation, the entire El Niño/La Niña system). …

What is El Nina in simple terms?

In Spanish, El Niño means “the little boy” and La Niña means “the little girl.” They are sort of like a brother and sister. Like many siblings, the two weather patterns are opposites in almost every way. La Niña causes water in the eastern Pacific to be colder than usual.

What are common characteristics of El Niño and La Niña quizlet?

Terms in this set (15) -The warming phase is known as El Niño and the cooling phase as La Niña. Southern Oscillation is the accompanying atmospheric component, coupled with the sea temperature change: -El Niño is accompanied with high, and La Niña with low air surface pressure in the tropical western Pacific.

Why El Niño happens?

El Niño occurs when warm water builds up along the equator in the eastern Pacific. The warm ocean surface warms the atmosphere, which allows moisture-rich air to rise and develop into rainstorms.

Is La Niña Good or bad?

A climate pattern that occurs every few years, La Niña heralds broadly cooler and wetter conditions in the tropics. For important rainforest biomes in Southeast Asia and South America, experts generally agree that La Niña brings higher-than-average rainfall.