air mass

(redirected from Polar Air Mass)
Also found in: Thesaurus, Acronyms, Encyclopedia.

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 ?
The polar air mass is forecast to bring more snow to regions 600 meters above sea level and heavy downpour in other areas but will start to taper off by midnight, the Jordan Meteorological Department said.
At least nine deaths have been reported across the country connected with the polar air mass that swept over North America during the past few days.
With snow falling in the West Bank city of Ramallah, wintry weather was also forecast for Amman and Jerusalem, and the polar air mass moving down from Russia sent temperatures plummeting as far south as Cairo.