Class 3b: Climate and Weather. Air pressure and winds Air is a fluid Warmer air is less dense Air moves from dense to less dense conditions Ex.: Land-sea.

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Presentation transcript:

Class 3b: Climate and Weather

Air pressure and winds Air is a fluid Warmer air is less dense Air moves from dense to less dense conditions Ex.: Land-sea breezes

Global air circulation Equator receives most insolation Hot air rises, heads towards poles Air becomes heavy and sinks at 30°N and S Plus the Coriolis effect

Warmer air “holds” more water Low pressure=warm air=precipitation High pressure=cold air=dry air

Ocean currents Follow same circular pattern (driven by wind) Warm currents flow away from equator, pile up on eastern shores –Gulf Stream, Brazil Cold currents flow towards equator, cause upwelling –Humboldt/Peru, California

Climate classification Temperature and precipitation Köppen classification system Nine types, plus highlands

Weather: hurricanes Start at low pressure centers Warm air rises Water evaporates with energy from sun With condensation, energy is released