Weather and Climate: Terms and Concepts

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polar front

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

polar front zone of transition between polar and tropical air masses . Its average position during the winter is at about 30° lat. and during the summer at about 60° lat. In the N Atlantic Ocean, for example, the polar front can often be traced as a continuous line extending over thousands of miles, usually toward the northeast from a point just off the coast of the United States at about 30°N. Most cyclones outside the tropics develop along the polar front from waves caused by the juxtaposition of cold air moving toward the equator and hot air moving toward the poles; the earth's rotation gives this air its cyclonic twist. See front .

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polar front

A Dictionary of Ecology | 2004 | | Copyright

polar front The main boundary line between polar and tropical air masses along which depressions develop in mid latitudes, especially over the oceans. The front is in general displaced towards the equator in winter and the poles in summer, though large displacements in either direction take place over shorter periods in individual sectors of the hemisphere.

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MICHAEL ALLABY. "polar front." A Dictionary of Ecology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "polar front." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O14-polarfront.html

MICHAEL ALLABY. "polar front." A Dictionary of Ecology. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-polarfront.html

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polar front

A Dictionary of Earth Sciences | 1999 | | Copyright

polar front The main boundary line between polar and tropical air masses along which depressions develop in mid latitudes, especially over the oceans. The front is in general displaced equatorwards in winter and polewards in summer, though large displacements in either direction take place over shorter periods in individual sectors of the hemisphere.

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AILSA ALLABY and MICHAEL ALLABY. "polar front." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "polar front." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-polarfront.html

AILSA ALLABY and MICHAEL ALLABY. "polar front." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-polarfront.html

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Free newspaper and magazine articles

	Big Oil gets OK to explore among polar bears.(Front) Newspaper article from: The Virginian-Pilot (Norfolk, VA); 6/15/2008
	Narwhals most at risk to Arctic warming than polar bears.(Front) Newspaper article from: The Virginian-Pilot (Norfolk, VA); 4/26/2008
	No new Polar protection.(Front) Newspaper article from: The Virginian-Pilot (Norfolk, VA); 5/9/2009