¥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