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Wind - PowerPoint PPT Presentation


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Wind. The summer wind, came rolling in, from across the bay. What causes wind?. Uneven heating of the Earth’s surface causes some areas to be warmer than others Warmer air is less dense and moves. Coriolis Effect. The rotation of the Earth causes wind. Like a spinning ball.

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Presentation Transcript
slide1

Wind

The summer wind,

came rolling in,

from across the bay

what causes wind
What causes wind?
  • Uneven heating of the Earth’s surface causes some areas to be warmer than others
  • Warmer air is less dense and moves.
coriolis effect
Coriolis Effect
  • The rotation of the Earth causes wind.
  • Like a spinning ball
types of coriolis winds
Types of Coriolis Winds

Polar Easterlies:

In the polar regions, cold, dense air sinks and moves away from the poles.

Westerlies

Near 30 degrees. Earth’s rotation moves winds from west to east toward polar region

Trade Winds:

Air near the equator heats up and move to the poles

Equatorial Doldrums:

Air heats up and becomes less dense, causing low pressure and almost daily rain storms.

jet stream
Jet Stream
  • Narrow belts of strong air near the top of the Troposphere
  • Jets flying East ride the wind to save time and fuel
  • Jets flying west fly at different altitudes(heights) to avoid the headwind.
sea breeze
Sea breeze
  • During the day, the sun heats the land and causes it to rise.
  • When the warmer, less dense air move up, cooler air from the sea moves in, causing a wind
land breeze
Land Breeze
  • At night land cools.
  • The warmer air over the sea rises and the land air moves in, causing a wind.