air mass

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air mass

n.
A large body of air with only small horizontal variations of temperature, pressure, and moisture.

air mass

n
(Physical Geography) a large body of air having characteristics of temperature, moisture, and pressure that are approximately uniform horizontally

air′ mass`


n.
a body of air covering a wide area, exhibiting approximately uniform properties through any horizontal section.
[1890–95]

air mass

A fairly uniform mass of air covering a large area and containing air of, for example, polar or tropical origin.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.air mass - a large body of air with uniform characteristics horizontally
atmospheric state, atmosphere - the weather or climate at some place; "the atmosphere was thick with fog"
high - an air mass of higher than normal pressure; "the east coast benefits from a Bermuda high"
low, depression - an air mass of lower pressure; often brings precipitation; "a low moved in over night bringing sleet and snow"
References in periodicals archive ?
Continental or maritime are dependent on whether the air masses come from over land or sea.
This can be explained by the dominance of air masses from the south and south-east.
A sharp cold snap in Kyrgyzstan is due to the Arctic air masses, Kyrgyzhydromet reported on January 24.
In its detailed weather forecast, it indicated the following: - General weather condition: Eastern Mediterranean basin will continue to be under the influence of warm air masses until Tuesday afternoon, accompanied by cold air masses leading to rainy weather - Weather forecast in Lebanon: Sunday: Overall clear with limited rise in temperature, especially in mountainous and inland areas, and low humidity Monday: Clear with few clouds, gradually turning into high clouds with stable temperatures and low humidity Tuesday: Partly cloudy, temperatures start to gradually decrease.
Twisters are formed when warm, moist air masses meet with cool air, creating instability in the atmosphere.
Media reports that clashing air masses produce tornadoes mischaracterize the abundant new observational and modeling research on how tornadoes form.
Shanghai has been plagued by high levels of air pollution for several days after air masses carried industrial emissions from neighbouring Jiangsu and Zhejiang provinces.
Meteorological officer Philippos Tymvios yesterday said warm and humid air masses were to blame for the last four days of warm weather.
The tool used to obtain information about the origin of the air masses arriving to the station has been the 10-day backward isentropic trajectories.
When water vapor condenses inside a thunderstorm, the heat that's released drives fast-rising air masses that can spawn tornadoes.
Because squall line thunderstorms are often triggered by weather fronts (boundary along which cold and warm air masses collide) rather than by the sun heating air at the earth's surface, the storms can happen any season, day or night.