Module 1 : Atmospheric Composition and Principles of Contaminant Behavior

Lecture 1 : The Atmosphere of Earth

 

Atmospheric Layers

 

 

 

 

 

 

Mesosphere

Middle atmosphere – Air thin, pressure low, Need oxygen to live in this region. Air quite Cold -90°C (-130°F) near the top of mesosphere

 

 

Thermosphere

“Hot layer” – oxygen molecules absorb energy from solar Rays warming the air. Very few atoms and molecules in this Region.