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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]
Officially, Earth last experienced a La Niña event in the spring of 2023 and has been in an El Niño or neutral status ever since. 5 Weather Events To Watch For In 2025
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 ...
[8] [9] [10] Despite the La Niña background to the Pacific Climate, four El Niño events occurred during 2002–03, 2004–05, 2006–07, and 2009–10. The first three of these events were weaker, while the 2009-10 event was a strong El Niño, but had shorter effects than the 1997–98 event.
A detailed analysis found La Niña began in December 2024 with a weak La ... La Niña is the cool phase of ENSO (El Niño-Southern Oscillation) that is marked by sea-surface water temperatures 0.5 ...
La Niña conditions typically span about 9 to 12 months but can go as long as two years, according to NOAA. “There’s a lot of things that come into play with that,” Cullen said on why La ...
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 ...
El Niño and La Niña greatly affect weather conditions worldwide. The last El Niño was in 2018-2019. ... “We expect a good, nice El Niño to come back after a few years of La Niña,” stated ...