Wind
Published on Nov 18, 2015
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PRESENTATION OUTLINE
THE MOVEMENT OF AIR
- The sun warms the Earth unevenly
- The difference in air pressure causes wind
- Air moves because of differences in density
Photo by Werner Kunz
THE MOVEMENT OF AIR
- Differences in pressure cause convection cells
- It creates high and low pressure areas
Photo by marcp_dmoz
THE MOVEMENT OF AIR
- The Coriolis effect is the curving of the path of an object due to the rotation of the Earth
- Air moving north in the Northern Hemisphere curves to the east
- Air moving south in the Northern Hemisphere curves to the west
Photo by Alexandre Moreau | Photography
GLOBAL WINDS
- Global winds can be caused by pressure belts
- It can also be produced by the Coriolis effect
Photo by Manoj Kengudelu
GLOBAL WINDS
- The three major wind systems are the easterlies, the westerlies, and trade winds
- Polar easterlies blow east to west
- Westerlies blow west to east
- Trade winds blow east to west
- Doldrums are weak winds near the equator
Photo by Gordon McKinlay
GLOBAL WINDS
- Jet streams are high speed winds that blow west to east
- They blow between 7 km and 16 km
Photo by Dania Do Svidaniya
LOCAL WINDS
- Local winds are the movement of air over a short distance
- They can blow any direction
- They are caused by local geographic features
Photo by overgraeme
LOCAL WINDS
- Sea breezes are caused by the water being cooler than land
- Land breezes are caused by high pressure zones above land
Photo by ecstaticist
