Southern Oscillation

The pressure rise in the western Pacific was then related to the warming of the eastern Pacific (El Niño event), atmospheric pressure rises in the western Pacific and falls in the east. This pressure drop is accompanied by a weakening of the easterly winds. The relationship between the Southern Oscillation with "El Niño" is called "El Niño-Southern Oscillation" or ENSO (ENSO, El Niño-Southern Oscillation). Sallie Baliunas says, "El Niño is part of an ocean-to-air changes system called" Southern-El Niño Oscillation ", where the" La Niña "phase tends to cool."

The strength of the Southern Oscillation is measured by the Southern Oscillation Index (SOI), which are the differences in atmospheric surface pressures normalized between Darwin (Australia) and Tahiti (French Polynesia) in the central Pacific. The advantage of the measurement between these locations is that there is a complete record from 1876 to date.

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