• synonyms

southern oscillation


a low-latitude fluctuation of atmospheric pressure closely linked with El Niño events, specifically the periods of El Niño warming and La Niña cooling.


Do You Know These Sizzlin’ Southern Sayings?Read more in this article about some frequently asked questions and fun facts related to our definitions.

Nearby words

southern gothic, southern hemisphere, southern ireland, southern lights, southern ocean, southern oscillation, southern paiute, southern redbelly dace, southern rhodesia, southern rhodesian, southern slavs Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for southern oscillation

southern oscillation

The cyclic variation of atmospheric pressure at sea level between the eastern and western regions of the southern Pacific Ocean as a result of the periodic cooling and warming of surface water known as La Niña and El Niño. It has an average period of 2.33 years.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.