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air mass
air mass
air mass(airmass) A large body of air (sometimes of oceanic or continental proportions) that is identified primarily by an approximately constant wet-bulb-potential temperature (i.e. the lowest temperature to which the air can be cooled by the evaporation of water into it). The temperature and
humidity characteristics of an air mass, which are roughly the same within the one air mass at a particular latitude and height, are modified by and modify the atmospheric environment through which the air mass passes.
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ARCTIC AIR MASSES BORN IN CANADA AND ALASKA MIGRATE OUR WAY
Newspaper article from: The Milwaukee Journal Sentinel; 12/3/1996; ; 434 words
; ...across Wisconsin, arctic air masses will be getting stronger...Alaska. These bitter cold masses of air are a common occurrence...Given a big enough mass of air and the proper...January. Because cold air is very dense, these...surface with the arctic air mass, ...
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Cold air masses often accompanied by windy conditions
Newspaper article from: The Milwaukee Journal Sentinel; 10/21/1997; ; 433 words
; ...to be lots of wind when cold air is moving into the area? The...earth's surface. As cold air masses spread into Wisconsin from...followed by bitter cold air masses. If we go to northern Canada where our cold air masses form, it is common to see...center of a Siberian arctic ...
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Wisconsin is where air masses fight it out
Newspaper article from: The Milwaukee Journal Sentinel; 10/4/1998; ; 409 words
; ...weather can be a battleground of air masses. Studies have shown that without...Hemisphere, we see changes in air masses more so than elsewhere. Besides...temperature ups and downs, air mass changes are associated with...and snow often form where air masses meet. Surface ...
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Contrasting air masses can trigger big spring storms
Newspaper article from: The Milwaukee Journal Sentinel; 3/10/2002; ; 445 words
; Storm Team 4 Contrasting air masses can trigger big spring storms By PAUL...This temperature difference results in air with different densities, a measure...molecules are in a specific volume of air. When air masses of different densities...
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Forecast center.(polar air masses)
Magazine article from: Weatherwise; 3/1/2006; ; 700+ words
; ...the frequent incursions of polar air masses into the United States are often...convergent flow increases the air mass contrasts by bringing them into tighter...Texas. A dryline demarcates the two air masses. To forecasters, it represents...
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AIR MASSES CLASH; SUNNY SNOWFALL RESULTS.(LOCAL)
Newspaper article from: The Virginian Pilot; 2/5/2002; 599 words
; ...swing through that brought much colder air into the region, and that's why...Weather Service in Wakefield. The cool air mass caused instability in weather conditions when it combined with a warm air mass contained mainly in the lower...
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 "The Post-Standard (Syracuse, NY)")
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CLASHING AIR MASSES CAUSED ICE.(Local)
Newspaper article from: The Post-Standard (Syracuse, NY); 4/7/2003; 700+ words
; ...of an unfortunate clash between warm and cold air masses, meteorologists said. When the two air masses collided Friday over a 13-county region...a zone over Upstate New York where the warmer air was coming up from the south, and colder air...
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Clash of air masses got June off to stormy start here
Newspaper article from: The Milwaukee Journal Sentinel; 6/2/2000; ; 440 words
; ...Team Milwaukee Forecast Clash of air masses got June off to stormy start here...was all because of a clash of air masses as an area of low pressure moved...storm. The good news is the new air mass that is pushing across Wisconsin...
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Tornado Disaster: Clash of air masses in Tornado Alley
Newspaper article from: The Independent - London; 5/5/1999; ; 700 words
; ...Tornado Alley" - where cold dry air from the Rocky Mountains meets warm moist air from the Gulf of Mexico. Where these two giant air masses meet, the warm air rapidly rises and its moisture condenses to form severe thunderstorms. In about...
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AIR MASSES TO BATTLE FOR WINTER'S LEGACY
Newspaper article from: Roanoke Times & World News; 2/10/2007; ; 700+ words
; ...The timing of a new dose of Arctic air early next week is also problematic...southern edge of a persistent Arctic air mass that has caused temperatures to average...weaker reinforcements of the Arctic air, so temperatures overall are likely...
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Air Masses and Fronts
Encyclopedia entry from: UXL Encyclopedia of Science
Air masses and fronts An air mass is a large body of air...content throughout. Air masses typically cover areas...that happens, the cold air mass behind the cold front...between these two cold air masses is an occluded front...
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Air masses and fronts
Encyclopedia entry from: The Gale Encyclopedia of Science
Air masses and fronts An air mass is a body of air with...significant altitude. Air masses typically cover hundreds...favor development of air masses. The two most...such regions, large masses of air can accumulate...would disturb the air ...
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air mass
Book article from: The Columbia Encyclopedia, Sixth Edition
air mass large body of air within...any one height. Air masses form over parts of the...area. When a body of air remains over a source...between the surface and the air determines the air mass...the tropics. As an air mass moves away from its ...
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Mass Wasting
Book article from: World of Earth Science
...walls, however, leave huge masses of rock unsupported except by...avalanche (another type of mass movement) will result. This...sand is a simple example of mass wasting. If sand is moist...there will be both water and air between most of the grains of...boundary between the water and the ...
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Catastrophic Mass Movements
Book article from: World of Earth Science
...the most notable catastrophic mass movements to have occurred during...common form of catastrophic mass movement . Other rock avalanches...are fluids rather than solid masses of rock and often run up the...avalanches glide atop pockets of air trapped beneath the rock mass. Other proposed ...
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