The Atmosphere
Definition: The body of air and gas surrounding the Earth.
Barometer and air pressure
Factors responsible for atmospheric pressure differences
Temperature
Humidity
Altitude
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:
Advection is the horizontal transfer of air.
Convection:
Convection refers to air rising vertically in the atmosphere due to heating.
