¥Every few years (4-5 years):
¥-Equatorial Central Pacific warms
¥-Low SLP, T-storms shift to Central and
East Pacific (the Southern
Oscillation)
¥-Trades and southerly winds off Peru
weaken
¥-Upwelling ceases off Peru, warming
leads to massive kill off of
fish. Typically occurs around Christmas (an El Ni–o
event)
¥FAlters global patterns of wind, temp and
rain