1. Global and Local Winds i
Kinsey

2. What causes wind? WIND is caused by the unequal heating of the Earth.
Warm air – low pressure/less dense/rises
Cold air – high pressure/more dense/sinks

3. Coriolis Effect
Coriolis Effect – Rotation of the Earth causes moving air and water to change directions
Northern Hemisphere winds curve to the right
Southern Hemisphere winds curve to the left.

4. Global Winds
• 3 Major Types of Global Winds – Trade Winds 30 – 30, east to west toward equator – Prevailing Westerlies 30 – 60, west to east, toward poles – Polar Easterlies – poles, east to west, toward equator

5. Doldrums
These are located at the equator at the middle of the Trade Winds, surface winds are calm and weak.

6. Horse Latitudes
The HORSE LATITUDES are at about 30° north and 30 ° south latitude.
Sinking air creates an area of high pressure, creating weak winds

7. Jet Stream Location: upper troposphere & lower stratosphere
Strong high speed and high pressure that can reach speeds of 400km/h
Affect the movement of storms & planes

8. What brings certain weather phenomenon?
El Nino
La Nina
Abnormally high water temperature in the Equatorial Pacific Ocean creating more humidity in the atmosphere
Increase number of hurricanes
Occur more frequently (every 3-7 years)
Abnormally low temperature in the Equatorial Pacific Ocean creating a more dry atmosphere
Creates drought conditions

9. Sea Breeze sea to the land (During the day)
Air over water is cooler (high pressure)
Cool, dense air moves toward land, creating a sea breeze.
Air over land is warmer, so the warm air rises, creating low pressure over land.

10. Land Breezes Location: land to the sea (During the night)
Air over land is cooler (high pressure)
Cool air moves toward the sea, creating a land breeze.
Air over the sea is warmer, so it rises creating low pressure.