Question

What is a maritime air mass?

Answer 1

Maritime air masses form over water and are humid. Continental air masses form over land and are dry. Therefore, an air mass that develops over northern Canada is called a continental polar air mass and is cold and dry. One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.

Answer 2

Maritime air mass, vast body of air of oceanic origin; also, an air mass (q.v.) that has had a long trajectory over water and has been so modified that it has the characteristics of an air mass of oceanic origin