GEOG 205 Lecture Notes - Lecture 7: Pressure-Gradient Force, Jet Stream, Rossby Wave
29 Nov 2017
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Document Summary
Due to the coriolis force there are three bands of wind: Easterly wind closest to the poles polar front. The polar jet stream is caused by the easterly winds and the westerly winds moving past each other in opposite directions. When the jet stream meanders it is called a rossby wave, which are undulations in the. When it meanders to the north: you get a relatively small high pressure system in. When it meanders to the south: a low pressure system develops which the air is sinking. When the jet stream is to the north in the summer, the semi-permanent high pressure develops over texas. During the winter it moves south and brings alternating storms and calm clear weather as low pressures move through the area. In the northern hemisphere, the turn to the right causes the wind to move at a right angle to the pressure gradient force and simply circles the high and low pressure systems.
