Which air mass is typically more humid?

The maritime air mass is typically more humid due to its origin over large bodies of water such as oceans and seas. When air masses form over water, they pick up moisture through evaporation. This moisture content results in higher humidity levels compared to air masses that originate over land, which lose that moisture more rapidly as they move and do not have access to the continuous supply of water that maritime air masses do.

In contrast, continental air masses originate over land and tend to be drier as they have less opportunity to absorb moisture. Polar air masses could have varying humidity levels, but they are often cold and can be dry, especially in winter. Equatorial air masses can be very humid, but they are typically characterized by warm temperatures rather than the humidity found in maritime air masses specific to locations near water.