Kiyomi Nakata 4.9 El Niño La Niña
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7 Terms
Gyers
large ocean circular pattern due to global wind (clockwise in N hemisphere, counterclockwise in S hemisphere)
Upwelling zones
areas of ocean where winds blow warm surface water away from a land mass, drawing up colder, deeper water to replace it
Thermohaline Circulation
connects all of the world's oceans, mixing salt/nutrients/temp throughout
El Niño Southern Oscillation (ENSO)
pattern of shifting atmospheric pressure & ocean currents in the pacific between South America and Australia/Southeast Asia
Normal Year
trade winds blow equator water W <-- E
cool water near SA (good fisherie$); high pressure
heat and precip. in Australia/SE Asia; low pressure
El Niño Year
trade winds weaken, then reverse W --> E
heat and precip. near NA and SA (poor fisherie$); low pressure
cooler, drier conditions in Australia/SE Asia; high pressure
La Niña Year
stronger than normal trade winds W <--<--<-- E
extra cool water near SA (extra good fisherie$); high pressure
more heat and precip. than normal in Australia/SE Asia; low pressure
Note 
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