continental polar air masses

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• 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… …   Aviation dictionary

• 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

• 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

• 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

• Continental climate — For the influence of continental climates on viticulture, see continental climate (wine). Continental climate is not found on southern hemisphere. Continental climate is a climate that is characterized by important annual variation in temperature …   Wikipedia

• 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

• polar ecosystem — Introduction       complex of living organisms in polar regions such as polar barrens and tundra.  Polar barrens and tundra are found at high latitudes on land surfaces not covered by perpetual ice and snow. These areas lying beyond the tree line …   Universalium

• Polar bear — This article is about the animal. For other uses, see Polar bear (disambiguation) …   Wikipedia

• North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium

• Africa — /af ri keuh/, n. 1. a continent S of Europe and between the Atlantic and Indian oceans. 551,000,000; ab. 11,700,000 sq. mi. (30,303,000 sq. km). adj. 2. African. * * * I Second largest continent on Earth. It is bounded by the Mediterranean Sea,… …   Universalium

• Japan, Sea of — or East Sea Branch of the western Pacific Ocean, bounded by Japan, by Sakhalin Island, and by Russia and Korea on the Asian mainland. It has a surface area of about 377,600 sq mi (978,000 sq km), a mean depth of 5,748 ft (1,752 m), and a maximum… …   Universalium