Atmosheric Circulation Part II Important Concepts to remember: Redistribution of Heat Effects of Rotation The role of friction Conservation of angular momentum

Seasonal Heating

Differential Heating From Equators to Poles

Non rotating view of Atmospheric Circulation High Pressure Low Pressure

Redistribution of Heat – Large scale convective Cells Schematic depiction of the development of the atmospheric circulation, starting from a state of rest Easterlies (Trades) Westerlies Redistribution of Heat – Large scale convective Cells

Rotation effects, the Coriolis Force

Some practical rules to remember: Fpressure Low Pressure High Pressure FCoriolis Particle will have the Coriolis force 90 degrees to the right Particles will tend to move along line of constant pressure Particles will have the high pressure on their right (same as Coriolis)

Easterlies (Trades) Westerlies Schematic depiction of the development of the atmospheric circulation, starting from a state of rest Easterlies (Trades) Westerlies

Circulation in the atmosphere Problem? Circulation in the atmosphere

Role of Friction

Easterlies (Trades) Westerlies Schematic depiction of the development of the atmospheric circulation, starting from a state of rest Easterlies (Trades) Westerlies

Circulation in the atmosphere Diagram of Atmospheric Circulation Circulation in the atmosphere

Vertical view of the atmosphere and Poleward Transport of Heat Hadley Cell Ferrel Cell Polar Cell Pole Equator

Midlatitude Cyclones

Poleward Heat Transport

Role of Friction on synoptic scales

L H Vortices Low Pressure System High Pressure System Fpressure FCoriolis FCoriolis Fpressure Low Pressure System High Pressure System

Hurricane IVAN H H L Fpressure H H FCoriolis

L L H H H L L L H H H L L Polar High Subpolar Low Subtropical High Eq. Low L L H H H L L

Rotation effects are not always important

Land-Sea Breeze

Moonsoons, a continental scale land-sea breeze