El Niño and La Niña Years and Intensities - Golden Gate Weather …
The Oceanic Ni ñ o Index (ONI) has become the de-facto standard that NOAA uses for classifying El Ni ñ o (warm) and La Ni ña (cool) events in the eastern tropical Pacific. It is the running 3-month mean SST anomaly for the Ni ñ o 3.4 region (i.e., 5 o N-5 o S, 120 o -170 o W ).
El Niños & La Niñas from 1986 to the present | El Nino Theme …
Note the major La Niña in 1988-1999, and major El Niños in 1996-1997 and 2015-2016. Years are marked on the left side, with 1986 at the top and the latest year at the bottom; Both panels show sea surface temperature along the equator in Pacific Ocean, with Indonesia on the left (west) and South America on the right (east).
El Nino and La Nina Years: NOAA Physical Sciences Laboratory
Top 24 Strongest El Niño and La Niña Event Years by Season. The values below were calculated using PSL's Extended Multivariate ENSO Index (MEI.ext) for 1895 to 2015.
El Niño–Southern Oscillation - Wikipedia
El Niño–Southern Oscillation (ENSO) is a global climate phenomenon that emerges from variations in winds and sea surface temperatures over the tropical Pacific Ocean. Those variations have an irregular pattern but do have some semblance of cycles. The occurrence of ENSO is not predictable.
U.S. winter temperatures for every El Niño since 1950
2018年10月24日 · The collection of maps at right show the difference from average (1981-2010) winter temperature (December-February) in each U.S. climate division during all El Niño events since 1950. Years are ranked from strongest El Niño (top left) to weakest (bottom right)‚ based on the December–February Oceanic Niño Index value.
What are El Nino and La Nina? - NOAA's National Ocean Service
Episodes of El Niño and La Niña typically last nine to 12 months, but can sometimes last for years. El Niño and La Niña events occur every two to seven years, on average, but they don’t occur on a regular schedule. Generally, El Niño occurs more frequently than La Niña.
Past Events - National Oceanic and Atmospheric Administration
Temporal evolution of El Niño and La Niña events indicated by the MEI.v2. Shown are the top 5 warm and cold non-overlapping events since 1979. Year 0 corresponds to the year of the event in the legends. Click on image to enlarge.
El Niño and La Niña Years and Intensities - Golden Gate Weather …
WE=Weak El Niñ o, ME=Moderate El Ni ñ o, SE=Strong El Niño, VSE=Very Strong El Niño WL=Weak La Ni ñ a, ML=Moderate La Ni ñ a, SL=Strong La Ni ña ENSO Type
El Niño & La Niña (El Niño-Southern Oscillation) - NOAA …
2024年11月14日 · El Niño and La Niña are the warm and cool phases of a natural climate pattern across the tropical Pacific known as the El Niño-Southern Oscillation, or “ENSO” for short. The pattern shifts back and forth irregularly every two to seven years, bringing predictable changes in ocean temperature and disrupting the normal wind and rainfall ...
El Niño and La Niña - National Oceanic and Atmospheric Administration
2015年7月1日 · For more than 30 years, climate researchers have been puzzling about how human-forced climate change affects the El Niño Southern Oscillation (ENSO), the warm phase of which we refer to as El Niño and the cold phase as La Niña.