With the earth’s current rotation, the major pressure systems of the general circulation can be correlated with the increase and decrease of air. When there is a considerable amount of air, precipitation will become present on a large scale. When there is less air, then there is an increase in chances of an area becoming dry. According to our textbook, a decrease in air on the eastern margin (west coast) creates a subsidence inversion. This causes dry weather. On the western margin (east coast) the humidity in the air rises, condenses and creates rain fall. So if the earth were to rotate in the opposite direction, we could possibly expect weather on the west coast to produce more rain and the weather on the east coastto become dry.
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