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Atmo 201 Exam 3

Chapters 9-14 of Meteorology Today

TermDefinition
Microscale From 0 to 2 meters, winds around buildings and trees, lasts for seconds to minutes.
Mesoscale From 10 to 100 kilometers, Thunderstorms and Tornados, lasts for minutes to hours.
Synoptic Scale ~2000 Kilometers, Tropical Storms and Hurricanes, lasts for hours to days.
Global/Planetary Scale `5000 Kilometers, Long Waves, Days to a week or more.
Turbulance Disturbed air that produces wind gusts and eddies, caused by viscosity.
Planetary Boundary Layer Area of atmosphere influenced by the friction of the surface, top at 1 kilometer, height is increased by surface heating.
Influence of the Boundary Layer
Eddies Form on the leeward side of objects, size depends on the size of the object and speed of wind.
Clear Air Turbulence (CAT) Eddies which form aloft in the atmosphere, sudden/unexpected wind shear, an issue for airplanes.
Global Circulation Average airflow of the atmosphere, helps to show driving forces, caused mainly by unequal heating.
Single Cell Model Assume uniform water surface, Sun directly above the equator, and earth not spinning, one cell (Hadley Cell) which carries heat upward at the equator then to the poles, air falls down at poles and cools then moves to the equator at the surface.
Triple Cell Model Much more accurate model of global circulation, three different cells which rotate heat around the earth.
Hadley Cell Hot air rises at the equator and is taken to 30 degrees where it cools and falls back to the surface
Ferrel Cell
Created by: cbald19
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