1 Changes in Energy balance

By | 18 Jan 2012
Geography CAPS > Grade 12 > Climate and Weather > 1 Changes in Energy balance

The Atmosphere

Definition: The body of air and gas surrounding the Earth.

Barometer and air pressure

Factors responsible for atmospheric pressure differences


Global pressure belts

Origin of high and low pressure cells

Please note the following YouTube video is for the NORTHERN HEMISPHERE!

The relationship between air pressure and wind

Wind is air in motion. Air moves from HIGH pressure to LOW pressure. The speed and direction of wind is influenced by the following two factors:
Pressure Gradient

Coriolis Force

Geostrophic flow

Surface Air Movement


Advection is the horizontal transfer of air.


Convection refers to air rising vertically in the atmosphere due to heating.