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Published byEdwin Hardy Modified over 9 years ago
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“Air Pressure, Centers, & Wind” 19.1/19.2
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Air Pressure Weight of Air All directions Changes in pressure cause wind Wind changes temperature & humidity
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Barometer Bar = pressure Metron = measuring tool
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1.Pressure “Gradient” (differences) 2.Coriolis Effect 3.Friction Factors Affecting Wind
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1.Pressure “Gradient” Gradient = difference Uneven heating from sun Air moves from H p L p HpHp LpLp
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Air Pressure –Measured in “Millibars” Isobar –Line of same pressure! Close Isobars –Fast wind Far Isobars –Slow wind 1008
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Predicting the Weather
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Weather Map 1.Pressure Center –Bull's-eye (High/Low) 2.HP –Clear skies –Good weather 3.LP –Cloudy –Precipitation
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High Pressure System. Nice Weather.
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Low Pressure System. NOT Nice
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2.Coriolis Effect –Changes wind direction –B_____ –Earth’s R________ 3.Friction –Changes direction –Kite ENDS OTATION
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