GEOG 1F91 Chapter Notes - Chapter 5: Geostrophic Wind, Coriolis Force, Pressure-Gradient Force
1 Nov 2016
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Document Summary
Atmospheric pressure is created when the weight of the gasses surrounding. The pressure occurs because the air molecules are constantly being pulled to. Barometer: an instrument similar to a thermometer, used for measuring temperature. Aneroid barometer: a thin-walled, sealed canister that forms a partial vacuum, which flexes as air pressure changes. Atmospheric pressure and density decreases with altitude. Ideal gas law: the relationship between air pressure, temperature, and density (pv = nrt) Constant pressure surfaces: a surface in the atmosphere in which pressure is uniform across all points. Air motion across the earth"s surface, typically in a horizontal direction. Wind is caused by atmospheric pressure, move from areas of high to low. Pressure gradient: change of atmospheric pressure measured along a line at right angles to the isobars. Air currents appearing to follow gently curving paths as they blow across.
