1.1 Atmosphere As Global Shstem Flashcards
Where is most solar energy revieved and why
At the equator as suns rays are more conecntrated over a smaller surface area and strike at right angle.
Where is least solar energy recieved and why?
At poles as revieve at lower angle and take longer to heat up a larger surface area
Describe high pressure
Cold air is more dense which brings heat creating low rainfall and no clouds
Describe low pressure
Heated air is more dense so rises above cold air creating low pressure so lots of rainfall and clouds
Describe Low pressure belt
Warm air rises causing lots of rainfall and lots of clouds
Describe high pressure belt
Cold air sinks creating high pressure belt with no rainfall and no clouds
3 types of atmospheric circulation cells and what angle
Hadley-30
Ferrel-60
Polar-at top and bottom
Where do trade winds blow in southern hemisphere
South-east to north-west until they reach equator
Where do trade winds blow in northern hemisphere
North-east to south-west until they reach equator
Westerlies in southern hemisphere
Blow north-west to south-east
Westerlies in northern hemisphere
South-west to north-east until they reach pole
What happens at 30 degrees north and south
Air further away from equator and cool air falls meaning high pressure.
What happens at 60 degrees north and south
Cold air is blow from poles meets warm air. Because warm air is less dense it rises and forms low pressure.
What occurs at poles
Cool air will sink forming a high pressure belt
Describe deep ocean currents
Differences in water density so water freezes at polar regions causing surrounding water to become saltier and more dense.
Dense water sinking lets warm water flow near surface causing earm water will cool and sink
