El Nino
thermocline
point in the water where the temperature drops considerably as depth increases
pycnocline
point in the water where the salinity increases considerably as depth increases
normal year
-west coasts of continents have light, cold, O2 and nutrient rich water and increased productivity
-tradewinds move away from continents
upwelling
cold water moves up to replace the water lost (ie. Peru)
el nino
-natural phenomenon
-about an 8 year cycle
-water level becomes high on west coasts and downwelling occurs (ie. in Peru)
impact
-occurred in 1997/1998
-2100 people died
-$33×10^9 damage
-the first one to be predicted

normal Brazil year crops: 650,000 tons
unpredicted year crops: 100,000 tons
predicted year crops: 530,000 tons

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