Type of Air Mass
Does it form over land or water?
Moist or Dry?
Is the air warm or cold?
Continental arctic/polar
Continental tropical
Maritime arctic/polar
Maritime tropical
Continental arctic/polar: This air mass forms over land and is dry and cold.
Continental tropical: This air mass forms over land and is dry and warm.
Maritime arctic/polar: This air mass forms over water and is moist and cold.
Maritime tropical: This air mass forms over water and is moist and warm.