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 predictednormal Brazil year crops: 650,000 tonsunpredicted year crops: 100,000 tonspredicted year crops: 530,000 tons