GEOG 1280 Lecture Notes - Lecture 20: Gulf Stream, Rain Gauge, Evapotranspiration
17 May 2017
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Document Summary
97. 22% of earth s water comes from the ocean. 2. 78% fresh water (77. 78% surface: mostly ice and glaciers in antarctica and greenland) groundwater, soil moisture, deep groundwater as well. Evaporation from the oceans: 419 (thousands km3/ year) 86% precipitation back into oceans: Atmospheric advection, movement from over ocean to over land: 94 and 57 from land to ocean precipitation onto the land: 106, 22% Evapotranspiration, from land to atmosphere: 69, 14% overland flow and runoff and groundwater flow: 37. There has to be a balance between evaporation and precipitation. Unless the snow that falls remains snow in the form of glaciers, ice ages etc. during this case, sea level falls) Higher evaporation in east coast of canada because of the gulf stream, air above the water source has to be dry. The amount of moisture that would evaporate and transpire if adequate moisture was available. It is the amount of water lost under optimum moisture conditions.
