Presentation on theme: "Thermal Circulation By Dr. Robert M MacKay Clark College Physics & Meteorology."— Presentation transcript:
Thermal Circulation By Dr. Robert M MacKay Clark College Physics & Meteorology
A tale of two identical cities
The air above City 1 cools and that above City 2 warms
Air pressure aloft is High above City 2
Winds aloft blow from city 2 to city 1.
Examples of Thermal Circulations
Sea Breeze during the day
Land Breeze at night
South East Asian Monsoon Very dry
South East Asian Monsoon Very wet
Mountain or Valley breeze??
Upward motion of Valley breeze made visible by clouds
Sea breeze convergence zone in Florida giving rise to very frequent thunderstorms. Florida has more thunderstorms each year than anywhere else in the US.
Stepped Art Fig. 9-25, p. 241
Local Winds Santa Anna Winds Santa Anna Winds –Warm dry that blows from east or northeast don canyons into S. California –Very fast, desiccates vegetation, providing fuel for fires Desert winds Desert winds –Dust storms, sand storms, dust devil, haboob