12 Density Currents More dense water sinks and pushes up less dense water This moves water around globe
13 What makes Water Dense? Cold Temperature High Salinity (amount of salt in water)
14 Cold, Salty WaterWhen water freezes, salts are dissolved and left in unfrozen waterThis makes unfrozen water VERY DENSEWhen frozen water melts, it is less denseThis causes a change in density and movement of water…DENSITY CURRENTS
16 It is important because… If the ice caps where to melt, then we would have a large amount of less dense waterIf salinity is reduced, then density currents would WEAKEN or STOPThis would cause major CLIMATE SHIFTSChange in climateChange in weather
17 El NinoAn occasional climatic event in which strong Pacific winds WEAKEN or REVERSE
18 Effects of El Nino Ocean temperatures near Peru HEAT UP. The position and strength of one of the jet streams may be altered, changing wind and precipitation patterns around the world.Africa and Australia may experience drought
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