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Oceanic Niño Index (ONI) The ONI is based on SST departures from average in the Niño 3.4 region, and is a principal measure for monitoring, assessing, and predicting ENSO. Defined as the three-month running-mean SST departures in the Niño 3.4 region. Departures are based on a set of improved homogeneous historical SST analyses (Extended ...
El Niño and La Niña have perhaps the strongest influence on year-to-year climate variability in Australia. They are a part of a natural cycle known as the El Niño–Southern Oscillation (ENSO) and are associated with a sustained period (many months) of warming (El Niño) or cooling (La Niña) in the central and eastern tropical Pacific.
El Niño est un phénomène climatique qui se caractérise par des températures anormalement élevées de l'eau dans la partie est de l'océan Pacifique sud, représentant une extension vers le sud du courant côtier saisonnier chaud du même nom au large du Pérou et de l'Équateur mettant fin à la saison de pêche [1].Les années El Niño sont associées à des températures caniculaires ...
The El Niño–Southern Oscillation is a single climate phenomenon that periodically fluctuates between three phases: Neutral, La Niña or El Niño. [12] La Niña and El Niño are opposite phases in the oscillation which are deemed to occur when specific ocean and atmospheric conditions are reached or exceeded.
Over a period of three months or more, values below -1.0 correspond to El Niño conditions while values above 1.0 correspond to La Niña conditions. Values between -0.5 and -1.0 lean toward El Niño, while values between 0.5 and 1.0 lean toward La Niña. Values between -0.5 and 0.5 are considered neutral. Using the SOI, NIWA has compiled a ...
5 de sept. de 2023 · El fenómeno de El Niño puede influir en la circulación atmosférica en el Atlántico y en el Mediterráneo, lo que, a su vez, puede afectar la formación y el comportamiento de sistemas de alta y baja presión. Esto puede tener un impacto en la distribución de las precipitaciones y la intensidad de los sistemas meteorológicos que afectan a ...
The term El Niño (Spanish for 'the Christ Child') refers to a warming of the ocean surface, or above-average sea surface temperatures, in the central and eastern tropical Pacific Ocean. The low-level surface winds, which normally blow from east to west along the equator (“easterly winds”), instead weaken or, in some cases, start blowing the other direction (from west to east or ...
