Presentation is loading. Please wait.

Presentation is loading. Please wait.

Wind Notes. Why does air move? Differences in air pressure – Caused by unequal heating of earth The air by the equator is warm and rises – Low pressure.

Similar presentations


Presentation on theme: "Wind Notes. Why does air move? Differences in air pressure – Caused by unequal heating of earth The air by the equator is warm and rises – Low pressure."— Presentation transcript:

1 Wind Notes

2 Why does air move? Differences in air pressure – Caused by unequal heating of earth The air by the equator is warm and rises – Low pressure The air by the poles is cold and dense – High pressure – Air moves from high pressure to low pressure Bigger difference = faster wind

3 Pressure Belts Wind travels in small belt patters It never travels too far because it will cool as it moves and sink back down Moves at a about 30 degrees at a time or down the earth

4 Which direction does the air move? Why? From A  B A = High Pressure B = Low Pressure Air moves from high pressure to low pressure to balance out

5 How does Earths rotation affects wind direction? Causes winds to curve – Without our rotation winds would move straight from the poles to the equator Coriolis Effect – Influence of Earth ’ s rotation on objects that move over Earth. – Winds curve – Only noticeable for long distances (Global Winds)

6 Two Main Types of Wind Both caused by uneven heating Global wind – 3 Types Calm Regions Wind Belts Jet Stream Local wind – 3 Types Sea Breeze Land Breeze Monsoon – Seasonal changes in wind

7 Global Winds Travel long distances Steady patterns Can last several weeks Caused by uneven heating between the equator and the north and south poles Sunlight is concentrated near the equator because it strikes the surface directly Sunlight is more spread out near the poles because it strikes at a lower angle

8 Global Winds Continued Uneven Heating – Equator More sunlight Warmer Temperatures Warm air rises because its less dense Creates a low air pressure – Poles Less sunlight Colder Temperatures Cold air sinks because it is more dense Creates a high pressure

9 Global Winds - Calm Regions Doldrums – Low-pressure zones – Near equator – The rising, moist air produces clouds and heavy rain. Horse Latitudes – High-pressure zones – Located 30 degrees north and south of the equator. – Clear and dry weather

10 Global Winds - Wind Belts Trade Winds – Blow from east. – Move towards equator. Die out as they near the equator Westerlies – Blow from the west. – Move towards the poles. Brings storms across much of the U.S. Easterlies – Blow from the east. – Move towards mid-latitudes. Storms occur when cold air from easterlies meets the warm air of the westerlies.

11

12

13 Global Winds – Jet Streams Flow in upper troposphere Travels west to east Moves at high speeds (greater than 124 mi/hr). Loop north and south Brings cold weather down from Canada Strong storms form near its loops

14

15 Local Winds Travel short distances Steady patterns Change daily Caused by uneven heating between land and water 3 Types – Land Breeze – Sea Breeze – Monsoon

16 Land Breeze Happens at night Land = High Air Pressure – Land cools down quicker than water causing it to have a high air pressure Water/Sea = Low Air Pressure – Water maintains its temperature causing it to have a low air pressure Air will move from high pressure to low pressure It will move from the land to water

17 Sea Breeze OPPOSITE of Land Breeze Happens during the day Land = Low Air Pressure – Land heats up quickly causing a low air pressure Think about a beach on a hot day Water/Sea = High Air Pressure – Water maintains its temperature causing it to have a higher air pressure Air will move from high pressure to low pressure It will move from the water to land

18 Land Breeze / Sea Breeze


Download ppt "Wind Notes. Why does air move? Differences in air pressure – Caused by unequal heating of earth The air by the equator is warm and rises – Low pressure."

Similar presentations


Ads by Google