polar front

The region or boundary separating air masses of polar origin from those of tropical or subtropical origin.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

polar front

(Physical Geography) meteorol a front dividing cold polar air from warmer temperate or tropical air

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

po′lar front`

the variable frontal zone of middle latitudes separating air masses of polar and tropical origin.

[1915–20]

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

polar front - the front of an advancing mass of colder air

cold front

front - (meteorology) the atmospheric phenomenon created at the boundary between two different air masses

squall line - a cold front along which squalls or thunderstorms are likely

Mentioned in

References in periodicals archive

One of the strongest open ocean barriers in the world is the Antarctic Polar Front (APF), which isolates the Southern Ocean from warmer waters at lower latitudes and thus contributes to the high endemism found in the Southern Ocean (Thornhill et al., 2008; Kaiser et al., 2013).

Crossing the Divide: Admixture Across the Antarctic Polar Front Revealed by the Brittle Star Astrotoma agassizii

The polar front remains over the area on Saturday, remaining very cold and cloudy.

Weather Forecast: Cold Front Hits the Region, Snow Expected

He said: "The polar front is the name given to the boundary between the cold air to the north and milder air to the south.

Warmest Christmas Day for 95 years

"The impact of the polar front will continue until Saturday.

Levant succumbs to snow attack: three reported dead in Lebanon as storm continues to shut-down the Middle East

To elaborate the classification of the weather types for the rhythm analysis, the classes of atmospheric systems identified by Monteiro (1973) were used, as follows: 1) Frontal Systems--Polar Atlantic Front (FPA), Reflex Polar Front (FPR), Polar Atlantic Front in Dissipation (DIS), Occlude Polar Atlantic Front (OCL), Repercussion of Polar Atlantic Front (REP), Stationary Polar Atlantic Front (EST), and Warm Front; 2) Individualised Systems--Tropical Instability Line and Atlantic Intertropical Convergence Zone; and 3) Air Masses--Polar Atlantic mass (mPA), Old Polar mass (mPV), Continentalized Old Polar mass (PVC), Tropical Atlantic mass (mTA), Continentalized Tropical Atlantic mass (TAC), Tropical Continental mass (mTC), and Equatorial Continental mass (mEQ).

The climatic rhythm and blooms of cyanobacteria in a tropical reservoir in Sao Paulo, Brazil/O ritmo climatico e as floracoes de cianobacterias em um reservatorio tropical em Sao Paulo, Brasil

Sullivan, the meteorologist, said the cold snap would be followed by two more polar fronts through the weekend.

Winter storm slams northeastern U.S. with Arctic punch

This complexity was to be found from south of the Cape (35oSe) down to the periphery of the major polar front activity at 45oSe, covering the entire southern Africa up to Madagascar.

Understanding weather not predicting

"At this time of year, the Polar Front Jet should be heading north, but over the weekend those easterlies will return with a vengeance, with rain turning to snow, and with a severe windchill.

SNOW END IN SIGHT; From sunshine spring last year to freezing temperatures and more snowfall over weekend

"Polar Low" has been defined as the genericterm for all mesoscale cyclonic vortices poleward of main polar front. It should be used for intense maritime mesocyclones with scales less than 1000 km with strong wind speeds [1].

Trends and variability of North Pacific Polar Lows

Adding to all this, the Ross Sea is considered to be the most productive stretch of water in the Southern Ocean and, despite its small size, contributes roughly a quarter of all the primary productivity generated in all the waters south of the Polar Front. Its 'pyramid' appears to be shaped more like a 'column' or 'trapazoid,' similar to tropical rain forests and coral reefs.

The Ross Sea: Dr David Ainley describes the Ross Sea in Antarctica, a rich biodiversity hotspot and perhaps the last remaining ocean on earth where top predators abound and drive the ecosystem. But industrial fishing, with New Zealand companies being major participants, threatens to destroy this unique ocean habitat and its abundant life