Page 5 - BP3Z 018 El Nino and La Nina
P. 5
In the 1920s Southern
Oscillation tended to occur in
the eastern Pacific at a
frequency of every three to
seven years, but since then the
frequency has increased.
Civilian populations frequently
refer to the Southern Oscillation
phenomenon as “El Niño” or “La
Niña”. Scientists point to global
warming as a major cause.
