Air Mass كاديلاك. Air masses based on source regions. Air masses cover many hundreds or thousands of miles.
Warm source regions (tropical air masses). Perhaps a calque of german luftmasse. They are distinct in that they take up.
An air mass is a large body of air that is usually thousands of kilometres wide.
Conditions for the formation of air masses. A wide variety of air mass options are available to you Conditions for the formation of air masses. As discussed in air mass intro, air mass measures how much atmosphere sunlight has to pass through.