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Pressure Gradients
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The pressure gradient force initiates movement of
atmospheric
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mass, wind, from areas of higher to areas of lower pressure
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Horizontal Pressure Gradients
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Typically only small gradients exist across large spatial scales
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(1mb/100km)
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Smaller scale weather features, such as hurricanes and
tornadoes,
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display larger pressure gradients across small areas
(1mb/6km)
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Vertical Pressure Gradients
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Average vertical pressure gradients are usually
greater than
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extreme examples of horizontal pressure gradients as pressure
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always decreases with altitude (1mb/10m)
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