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en.wikipedia.org/wiki/Air_mass

In meteorology, an air mass is a volume of air defined by its temperature and water vapor ... Colder air masses are termed polar or arctic, while warmer air masses are ... of tropical air produced by the subtropical ridge over large areas of land and ... of air in their wake, cold fronts and cold occlusions move faster than warm ...

en.wikipedia.org/wiki/Warm_front

A warm front is a density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient. Warm fronts lie within broader troughs of low pressure than cold fronts, and move more slowly than the cold fronts which usually follow because cold air ... As the air mass rises into regions of lower pressure, it expands and cools.

en.wikipedia.org/wiki/Weather_front

A weather (state of atmosphere) front is a boundary separating two masses of air of different ... Fronts separate air masses of different types or origins, and are located ... Cold fronts can produce sharper changes in weather and move up to twice ... or devolve into shear lines, but they can transform into a cold or warm front if ...

www.answers.com/Q/When_a_cold_air_mass_moves_into_an_area_where_a_warm_air_mass_is_located_it_is_called_a

When a cold air mass moves into an area where a warm air mass is located it is called a? When a cold ... Warm air moving over a cold air mass will produce a?

www.answers.com/Q/What_is_produced_when_a_warm_air_mass_moves_into_an_area_where_a_cold_air_mass_is_located

What is produced when a warm air mass moves into an area where a cold air ... What kind of weather is likely to occur if warm air masses move over a cold air ...

www.answers.com/Q/When_a_cold_air_mass_moves_into_an_area_where_a_warm_air_mass_is_located_it_is_called_a%28n%29

Cold front. ... When a cold air mass moves into an area where a warm air mass is located it is called a(n)?. When a cold air mass moves into an area where a ...

www.nationalgeographic.org/encyclopedia/air-mass

Mar 30, 2011 ... ... to the stratosphere—16 kilometers (10 miles) into the atmosphere. ... Arctic air masses form in the Arctic region and are very cold. Tropical air masses form in low-latitude areas and are moderately warm. ... One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.

climate.ncsu.edu/edu/k12/.fronts

Aug 9, 2013 ... A front describes the boundary between two air masses containing different temperature and/or ... Figure A: Fronts Located on a Surface Weather Map ... A warm front is the surface boundary between a warm air mass and a cold air mass it is overtaking. The warm air moves into an area of colder, drier air.

cimss.ssec.wisc.edu/wxwise/class/frntmass.html

Air Mass is an extremely large body of air whose properties of temperature and ... continental c - located over large land masses--dry; marine m - located over ... mT maritime tropical warm, moist, usually unstable ... What weather changes do you expect when TV weather person says a cold front is moving through the area?

www.met.tamu.edu/class/atmo202/Dir-surface/surface-stu.html

Continental Arctic (cA): This air mass is characterized by extremely cold ... As shown by the image, they move southward across Canada and occasionally move into the ... they usually produce clouds and precipitation as they move inland and are ... when a low pressure mid- latitude cyclone is located south of the area.