Lecture 10 - Lecture 10 Cyclones Anticyclones and Air...

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Lecture 10: Cyclones, Anticyclones, and Air Masses The circulation model describes the global average characteristics of climate. More realistic consideration of regional patterns gives us a better look at weather.
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Cyclones and Anticyclones Cyclones (low pressure centers with counterclockwise air flow in NH, clockwise air flow in SH). Low-level convergence Upper-level divergence Rising air motion Clouds and precipitation Anticyclones (high pressure centers with clockwise air flow in NH, counterclockwise air flow in SH). Low-level divergence Upper-level convergence Subsiding air motion Clear skies and fair weather
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Air Masses An air mass is a large body of air (>1000 2 km in surface area) with relatively uniform properties (temperature and moisture) in the horizontal direction, but not uniform vertically. Air masses form where there are persistent atmospheric conditions.
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