global atmospheric circulation

• angle of insolation: at the equator, the sun is overhead, so its at its strongest, at the poles, its dispersed over a large area, so land isn't heated as much
• insolation: incoming solar radiation
• curvature of the earth

  close to the poles, the sun has to pass through a larger area of atmosphere

  more energy lost, so its cooler
• atmospheric pressure

  high pressure: air is sinking

  low pressure: air is rising
• high pressure: air sinks, stable atmosphere (sunny)
• low pressure: air rises, unstable atmosphere (cloudy)
• low pressure: air rises, unstable atmosphere (wind/rain)
• hot air rises, creating low pressure

  cool air sinks, creating high pressure
• the Coriolis effect:

  the coriolis force deflects air due to earths rotation.as air moves from high to low pressure in the northern hemisphere, it is deflected right

  opposite in southern
• the earths rotation is fastest at euator
• coriolis effect

  
• hot air at the equator rises, letting cooler air to rush in (from the tropics), the hot air then cools and moves out towards the tropics, it then sinks, forming a Hadley cell
• Hadley cell at equator -> same directions

  polar cell at the poles -> same directions

  ferral cell in the middle -> opposite
• global atmospheric circulation transfers heat energy from equator to poles