The Southern Oscillation Index (SOI)
A)is defined as the monthly sea level pressure departure from normal at Tahiti minus the departure from normal at Darwin, Australia.
B)can be used to give a historical perspective on ENSO occurrences.
C)is negative during a La Nina event.
D)is positive during an El Nino event.
E)Only A and B are true.

Question

Quizplus · Accepted Answer

The Southern Oscillation Index (SOI) is defined as the monthly sea level pressure departure from normal at Tahiti minus the departure from normal at Darwin, Australia, and can be used to give a historical perspective on ENSO occurrences. It is negative during a La Nina event and positive during an El Nino event. Therefore, only statements A and B are true.