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USC ENST 320a - Lecture 8 - Hydrologic Cycle

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Exxon Pipe transporting tar sands across the USCan leak and get in the Ogallala AquiferClimate change because it’s a dirty source and takes a lot to refineHydrosphere and Cryosphere (ice)Most fresh water is in iceHumans are 60% water and can only go a few days withoutWater shortage is THE major crisis of the futureOver 50% of world’s pop does not have waterEmotionally connected to water and the color blue  used to inspire people to conservationBiological/psychological attachment to the oceanBlue marble campaign – our planet is blueDifferent phases of waterIce, Liquid, Vapor – all involved in the hydrologic cycleUniversal SolventDrives biochemical rxns, especially in bodySolid is lighter than liquid  ice floats  organisms can live under iceCrucial role in weather and climateHydrological Cycle powered byGravity – PrecipitationSolar Energy – Evaporation5 processes: Precipitation, Condensation, Evapotranspiration, Runoff, InfiltrationTranspiration: Water absorbed by plants to leaves  vapor leaves from leavesDetermines global water budget: proportion of water in different stagesNet increase in water over waterOver land: net decrease, because it is driven by precipitationART= size of reservoir/rate of transferAmount of time a parcel of water stays in a reservoirHydrologic Cycle 02/14/2013Exxon Pipe transporting tar sands across the US-Can leak and get in the Ogallala Aquifer -Climate change because it’s a dirty source and takes a lot to refineHydrosphere and Cryosphere (ice) -Most fresh water is in ice-Humans are 60% water and can only go a few days without -Water shortage is THE major crisis of the future oOver 50% of world’s pop does not have water -Emotionally connected to water and the color blue  used to inspirepeople to conservation oBiological/psychological attachment to the ocean oBlue marble campaign – our planet is blue Different phases of water -Ice, Liquid, Vapor – all involved in the hydrologic cycle -Universal Solvent -Drives biochemical rxns, especially in body -Solid is lighter than liquid  ice floats  organisms can live under ice -Crucial role in weather and climate Hydrological Cycle powered by -Gravity – Precipitation-Solar Energy – Evaporation 5 processes: Precipitation, Condensation, Evapotranspiration, Runoff, Infiltration -Transpiration: Water absorbed by plants to leaves  vapor leaves from leavesDetermines global water budget: proportion of water in different stages-Net increase in water over water-Over land: net decrease, because it is driven by precipitation ART= size of reservoir/rate of transfer -Amount of time a parcel of water stays in a


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