0 a large area of air that has nearly the same temperature and humidity at any height --
1 a large area of air that has nearly the same temperature and humidity at any height --
The calculated air mass reaches a maximum of 11.13 at 86.6, becomes zero at 88, and approaches negative infinity at the horizon.
The polar air mass dominates this part of the state year-round.
Hence, such an air mass becomes "warmer" relative to the atmosphere.
This will be enhanced when the moving air mass is uplifted by higher elevations.
Each air mass type brings in different temperature and moisture properties.
The last air mass that affects this ecoregion is the maritime polar air mass.
The thicker the cold air mass is, the more effectively it can block an invading milder air mass.
As the front moved north, a warm, moist air mass expanded over the southern two-thirds of the state.
