HydrologicCycle

HydrologicCycle - absolute humidity - direct measure of...

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Subject: Physical Geography Session: Hydrologic Cylce at 04:52 PM Water into the Sky Evaporation - soil/open water • Transpiration - plant leaves • Evapotranspiration • water vapor entering air in two forms • potential evapotranspiration - maximum moisture that could be lost from soil and vegetations if the ground were wet all the time • humidity - amount of water vapor in air • saturation - equilibrium between evaporation and condensation • Movement of water vapor molecules exerts vapor pressure • higher vapor pressure, higher WV content • Lower vapor pressure, lower WV content • Saturation (equilibrium) vapor pressure = max Water Vapor pressure possible • temperature and saturation = exponentially increasing relation • Humidity • amount of water vapor in the air
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Unformatted text preview: absolute humidity - direct measure of water vapor content of air (g of WV/m^3 air) as air volume changes, absolute humidity changes specific humidity - mass of water vapor in given mass of air (g WV/kg air) as air volume changes, specific humidity does not change relative humidity - amount of water vapor in the air in comparison with the total amount that could be there if air were saturated ratio expressed as a percentage relative humdidty = (actual water vapor in air / capacity) x 100 changes - if water vapor content or water vapor capacity changes, inverse relationship with temperature how dry the atmosphere is Dew point - critical air temperature at which saturation is reached...
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This note was uploaded on 11/19/2011 for the course GEOG 1002 taught by Professor Engstrom during the Fall '11 term at GWU.

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HydrologicCycle - absolute humidity - direct measure of...

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