Describe global atmospheric circulation.

1)equator-Sun warms equator, air rises and cools - low pressure, clouds rain. Then moves away to 30degree N&S and sinks - high pressure, cloudless low rain. Cool air reaches ground and moves as surface winds back to equater ( easterlies trade winds which meet and cycle happens again) or poles (westerlies) 2)60degrees-warm surface winds meet and are less dense than cold air from poles so rise causing low pressure some moves back to equator and some moves back to poles then sink causing high pressure 1)the high pressure air at the poles is drawn back to the equator as surface winds. Exact location of pressure belts vary over time