1. Local wind patterns II 

2. What are Local winds?
Local winds are one of the main types of winds caused by differences in air temperature. The temperature differences often develop through the day as the sun heats the air and land, but they can also be formed when surfaces do not heat or cool evenly

3. How are the following local wind patterns formed?
Land and sea breezes
Mountain and valley breezes
Chinook and Santa Ana winds
Country breeze

4. Land and sea breezes
Sea and land breezes are types of thermal circulation systems that develop at the interface of land and ocean. During the daytime land heats up much faster than water as it receives solar radiation from the Sun . The warmer air over the land then begins to expand and rise forming a thermal low.
Daytime

5. At sunset, the land surface stops receiving radiation from the Sun
At sunset, the land surface stops receiving radiation from the Sun . As night continues the land surface begins losing heat energy at a much faster rate than the water surface. Wind flow now moves from the land to the open ocean. This type of localized air flow is called a land breez
Night time

6. Mountain and valley breezes
A valley breeze develops during the day as the Sun heats the land surface and air at the valley bottom and sides. As the air heats it becomes less dense and buoyant and begins to flow gently up the valley sides.
Day time

7. Mountain and Valley Breezes
During the night, the air along the mountain slopes begins to cool quickly because of long wave radiation loss it becomes more dense and begins to flow downslope causing a Mountain breeze
Night time

8. Chinook and Santa Ana winds
Chinook wind- warm, westerly wind found in western North America-
Canada and the USA, when air from the Pacific blows over the Rocky Mountains and other upland areas.
Santa Ana winds- hot, dry, strong, blustery, föhn-type wind which blows from the north-east or east over southern California and carries with it large quantities of dust

9. Country breeze
One of local wind called a country breeze is associated with large urban area As the name implies this circulation pattern is characterized by a light wind blowing into the city from the surrounding country side

10. How do these local wind patterns affect our daily lives?
yellow dust
Tornado
typhoon
Hurricane

11. reference http://www.ask.com/science/local-winds-45330ad2a772b05