polar air mass
- That air mass that originates in high latitudes. Polar air masses are of two types—polar maritime and polar continental. The polar continental has its source in continental Eastern Europe, Siberia, and Canada, and it brings very cold weather to the United Kingdom and United States in winter. This air mass is characterized by very cold dry air. Polar maritime air often originates in the Greenland or Gulf of Alaska regions and spreads across the United Kingdom or United States from a northwesterly direction. It is humid and unstable.
Aviation dictionary. 2014.
Look at other dictionaries:
polar air mass — air mass that forms over land or water in the higher latitudes. See air mass; front. * * * … Universalium
Air mass — For other uses, see Air mass (astronomy) and Air mass (solar energy). Different air masses which affect North America, as well as othe … Wikipedia
air mass — a body of air covering a relatively wide area, exhibiting approximately uniform properties through any horizontal section. [1890 95] * * * In meteorology, a large body of air having nearly uniform conditions of temperature and humidity at any… … Universalium
air mass — n. Meteorol. a huge, uniform body of air having the properties of its place of origin: see POLAR CONTINENTAL, POLAR MARITIME, TROPICAL CONTINENTAL, TROPICAL MARITIME … English World dictionary
air mass — noun a large body of air with uniform characteristics horizontally • Hypernyms: ↑atmosphere, ↑atmospheric state • Hyponyms: ↑high, ↑low, ↑depression * * * noun : a body of air extending hundreds or thousands of miles horizontally and someti … Useful english dictionary
air mass classification — noun a) Meteorology. a system used to identify and to characterize the different air masses according to a basic scheme. A number of systems have been proposed, but the Bergeron classification has been the most widely accepted. In this system,… … Wiktionary
air mass — /ˈɛə mæs / (say air mas) noun a large body of air, up to thousands of kilometres in extent, of uniform temperature and humidity, and impacting on an adjacent air mass at a well defined front; classified according to temperature as Arctic,… … Australian English dictionary
air mass — large body of air with shared temperature and humidity characteristics associated with its area of origin e.g. maritime or continental; tropical or polar … Geography glossary
air mass — Synonyms and related words: anticyclone, cold front, cold sector, cyclone, front, high, high pressure area, isobar, isometric, isometric line, isopiestic line, isotherm, isothermal line, low, low pressure area, occluded front, polar front, squall … Moby Thesaurus
polar — i. An air mass with characteristics developed over high latitudes, especially within subpolar highs. Continental and maritime are two types of polar air masses. See polar air mass. ii. The parameters plotted on polar coordinates. See polar… … Aviation dictionary