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| The pressure exerted by the weight of air above. Driving force of wind, both magnitude and direction |
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| When meteorologist measure atmospheric pressure they employ this unit. |
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| Invented by Tortricelli, 1643 the use of mercury for measuring air pressure. |
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| Smaller and more portable instrument, uses a partially evacuated metal chamber. |
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| provides continuous record of pressure changes with the passage of time. |
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| Flow of air horizontally, air flows from areas of higher pressure to areas of lower pressure. |
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| the ultimate energy source for most wind |
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| lines that connect places of equal air pressure |
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| the spacing of isobars indicates the amount of pressure change occurring over a given distance |
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| the deviation is the result of earths rotation |
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| upper-air winds generally take the path of parallel to the isobars |
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| The most prominent feature of upper level flow are the jet streams |
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| friction causes an in flow around a cyclone |
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| net outflow around an anti cyclone |
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| pressure, very useful aid in short range weather prediction |
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| Unequal heating of Earth's surface |
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| a region marked by abundant precipitation |
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| center of the zone subsiding dry air, deserts of australia, arabia, and North Africa |
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