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The El Niño–Southern Oscillation is a single climate phenomenon that quasi-periodically fluctuates between three phases: Neutral, La Niña or El Niño. [12] La Niña and El Niño are opposite phases which require certain changes to take place in both the ocean and the atmosphere before an event is declared. [12]
Weakening sea surface temperature anomalies in the tropical Pacific in early 2023 associated with the end of the La Niña event. The 2020–2023 La Niña event was unusual in that it featured three consecutive years of La Niña conditions (also called a "triple-dip" La Niña) in contrast to the typical 9–12 month cycles of the El Niño–Southern Oscillation (ENSO), [3] though the magnitude ...
El Niño is a natural climate event caused by the Southern Oscillation, popularly known as El Niño or also in meteorological circles as El Niño-Southern Oscillation or ENSO, [6] through which global warming of the eastern equatorial Pacific Ocean results in the development of unusually warm waters between the coast of South America and the ...
The 2009–2010 El Niño event started in the Pacific Ocean during July 2009, before it reached it peaked during December and broke down during the first quarter of 2010. [5] [6] The climate of the Pacific Ocean subsequently returned to neutral conditions by the end of April, while climate models used and developed by various meteorological agencies, subsequently started to show signs that a ...
A typical La Niña pattern produces a wetter, cooler winter over the northern U.S., while drier, milder weather takes hold of the South. While there have been important caveats that go against the ...
La Niña’s arrival was a long time coming. Long-range forecasters at the CPC first raised the possibility of a switch to La Niña back in February 2024 when El Niño was still very strong. At ...
El Niño and La Niña greatly affect weather conditions worldwide. The last El Niño was in 2018-2019.
La Nina, El Nino and climate change. Scientists say the link between climate change and La Nina and El Nino is not entirely clear. Paul Roundy, climate scientist at the University of Albany, said climate models tend to indicate more frequent El Ninos and less frequent La Ninas, but not all models agree.