1Hydrologic Cycle1.Distribution of water2.Hydrologic cycle model3.Water phase change4.Surface water environment5. Groundwater6.Atmospheric water and humidity7. CloudsDistribution: land & water hemispheresDistribution: ocean & freshwaterHydrologic cycle model: terms•Precipitation: rain, snow, sleet, hail•Evaporation: phase change of water to water vapor•Transpiration: the movement of water vapor out from the pores of leaves•Advection: horizontal movement of air or water from one place to another•Runoff: surplus surface water after soil is saturatedHydrologic cycle model•Extent:– troposphere, across surface and to several km below the surface•Timeframes:– Has been operating in dynamic equilibrium for billions of years–Average transit time for water in atmosphere (evap to precip) is 10 days–Average transit time for deep ocean circulation, groundwater aquifers and glacial ice is ~10,000 yearsHydrologic cycle model
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