Author Question: Analysis of Southern Oscillation Index (SOI) trends indicates A) La Nina episodes are becoming ... (Read 104 times)

Marty · **on:** Jul 14, 2018

Analysis of Southern Oscillation Index (SOI) trends indicates

A) La Nina episodes are becoming more common.
B) El Nino episodes are becoming more common.
C) the frequency of La Nina and El Nino is equal.
D) none of the above.

Question 2

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.