Southern Oscillation and its Feature
Southern Oscillation refers to the shifting temperature, air pressure and sea surface temperatures between Pacific and Indian oceans. During the southern oscillation, there is a warming as well as a cooling phase which impacts the temperature of tropical and subtropical regions across the world. The cooling phase is known as La Nina and the warming phase is called El Nino. This is a periodic phenomenon which happens at irregular intervals.
An important feature of Southern Oscillation is its association with El Nino. During El Nino instead of cool currents, warm temperatures are blown over the Peruvian coast. Southern Oscillation Index is used to measure the strength of southern oscillation and observe the climatic changes.