1. Energy Transfers
IB SL

2. Energy Transfers
These occur within the atmosphere in order to maintain a balance between the amount of energy received at the poles and the equator.
There is an excess of radiation in all places on earth apart from the poles, and this imbalance needs to be addressed.
If there were no transfers of energy throughout the atmosphere, the Poles would continue to decrease in temperature, whilst the equator would continue to increase in temperature.

3. Hot And Cold
Negative heat balance: Exists at the poles - a loss of energy to the atmosphere.
Positive heat balance: Exists within the tropics, a surplus of energy.
Horizontal and vertical heat transfers take place to balance the situation.

4. Heat Transfers Horizontal heat transfers
The transfer of heat from the equator to the poles occurs via winds - 80% (large scale to small scale) and ocean currents (20%).
Vertical heat transfers
Exist to stop the atmosphere from cooling and the Earth's surface from overheating.
They occur via conduction, convection, latent heat transfers and radiation.

6. Activity
Look at P209 in Geography An Integrated Approach and answer the following...
Why is there a general trend of movement of heat energy from the Equator to the Poles? Explain.
How is heat transferred from the Tropics towards the Poles?