GEOG 2505 Lecture Notes - Lecture 17: Pressure-Gradient Force, Geostrophic Wind, Coriolis Force
14 Oct 2018
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Point b would be receiving more input than a, so b heats up more and air begins to rise at that point. Air then rushes in to replace the air rising at point b which produces wind. Meanwhile, the rising air eventually cools and descends back towards the earth"s surface. Upward motion forms precipitation, and descending air forms areas of high pressure. The region of rising air exerts less pressure on the surface, forming an area of low pressure, and will produce new cloud cover due to the rising air. The region of descending air exerts more pressure on the surface, creating an area of high pressure, and the descending air typically clears the skies. When the mercury levels fell, stormy conditions ensuited. When the mercury levels rose, fair weather occurred. Note the isobar (the line connecting the points of equal air pressure) near the high pressure center marked 1020.
