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30 Air Masses

30 Air Masses - a Zonal flow flat west to east b Meridional...

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10/30 Air Masses 1. Air mass: air within circulation cell that shows relatively high degree of homogeneity 2. Direction of flow over high and low pressure a. Northern Hemisphere: clockwise and outward with High pressure b. Counterclockwise and inward with Low pressure c. Opposite in the Southern Hemisphere 3. Moisture characteristics a. Continental: air mass over land b. Maritime: air mass over water 4. Temperature characteristics a. Polar: higher latitudes: cold b. Tropical: equatorial region: warm 5. 4 basic air mass types a. mT: maritime tropical b. cT: continental tropical c. mP: maritime polar d. cP: continental polar 6. Jet stream patterns
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Unformatted text preview: a. Zonal flow: flat west to east b. Meridional flow: large North to South movement with jet stream still West to East 7. Cyclones a. Depends on temperature contrast between air masses, upper level support, and moisture 8. Fronts a. Occluded: max development and getting higher pressure b. Cold front: causes clouds and precipitation, high pressure, clear weather c. Warm front: elongated precipitation 9. Backdoor cold front: comes down from North 10. Frontogenesis: formation of a front 11. Frontolysis: weakening of a front 12. Jet streak: region of high wind speed that moves through axis of jet stream...
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