Noun
a large body of air with uniform characteristics horizontally
Source: WordNet“As a result of a very cold air mass, two preliminary record-low temps were set this morning,” meteorologists said — at Paso Robles Municipal Airport, which hit 21 degrees, and at Santa Barbara Airport, which tied its record of 32 degrees. Source: Internet
In principle, if no outside temperature change affects this area (e.g. a warm air mass ), the raised albedo and lower temperature would maintain the current snow and invite further snowfall, deepening the snow–temperature feedback. Source: Internet
In addition, the higher density air mass sweeping in behind the cyclone strengthens the higher pressure, denser cold air mass. Source: Internet
A warmer air mass moving over a cooler one can "shut off" any convection which may be present in the cooler air mass. Source: Internet
However, cumulonimbus clouds are most common in tropical regions. citation Life cycle or stages In general, cumulonimbus require moisture, an unstable air mass, and a lifting force (heat) in order to form. Source: Internet
Examples of genetic classification include methods based on the relative frequency of different air mass types or locations within synoptic weather disturbances. Source: Internet