Definitions for "Southern Oscillation"
a see-saw of atmospheric pressure anomalies between the Indonesian region and the eastern tropical Pacific Ocean.
Climatic variation, particularly rainfall, caused by changes in air pressure and sea pressure in the Pacific Ocean; also known as El Niño-La Nina
is the periodic change (i.e., oscillation) of sea level pressure differences across the tropical Pacific that have been found to correlate with El iño and La iña events. First recognized by British scientist Sir Gilbert Walker in the 1920s by observing pressure differences between Darwin, Australia and Tahiti while stationed in India studying the monsoon.