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  2. Air mass - Wikipedia

    en.wikipedia.org/wiki/Air_mass

    Continental tropical air masses are extremely hot and dry. [7] Arctic, Antarctic, and polar air masses are cold. The qualities of arctic air are developed over ice and snow-covered ground. Arctic air is deeply cold, colder than polar air masses. Arctic air can be shallow in the summer, and rapidly modify as it moves equatorward. [8]

  3. Arctic front - Wikipedia

    en.wikipedia.org/wiki/Arctic_front

    (cA is continental arctic; cP is continental polar; mP is maritime polar; cT is continental tropic; and mT is maritime tropic.) The Arctic front is the semipermanent, semi-continuous weather front between the cold arctic air mass and the warmer air of the polar cell. It can also be defined as the southern boundary of the Arctic air mass. [1 ...

  4. Atmospheric circulation - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_circulation

    When the air reaches the polar areas, it has cooled by radiation to space and is considerably denser than the underlying air. It descends, creating a cold, dry high-pressure area. At the polar surface level, the mass of air is driven away from the pole toward the 60th parallel, replacing the air that rose there, and the polar circulation cell ...

  5. Polar vortex? Artic air mass? Whatever it's called, here's ...

    www.aol.com/polar-vortex-artic-air-mass...

    The polar vortex is a large area of low-pressure and cold air surrounding both of the Earth’s poles, according to the weather service. It always exists near the poles.

  6. The Polar Vortex Explained

    www.aol.com/news/polar-vortex-explained...

    The polar vortex works counterintuitively to what you might expect – the stronger it is, the less impactful it is. When the polar vortex is strong, cold air is less likely to plunge deep into ...

  7. Weather front - Wikipedia

    en.wikipedia.org/wiki/Weather_front

    w if the air mass is w armer than the ground below it. Different air masses which affect North America, as well as other continents, tend to be separated by frontal boundaries. In this illustration, the Arctic front separates Arctic from Polar air masses, while the Polar front separates Polar air from warm air masses.

  8. Spatial Synoptic Classification system - Wikipedia

    en.wikipedia.org/wiki/Spatial_Synoptic...

    Based upon the Bergeron air mass classification scheme is the Spatial Synoptic Classification system, or SSC.There are six categories within the SSC scheme: Dry Polar (similar to continental polar), Dry Moderate (similar to maritime superior), Dry Tropical (similar to continental tropical), Moist Polar (similar to maritime polar), Moist Moderate (a hybrid between maritime polar and maritime ...

  9. Very cold weather is coming. US about to get 10th and ...

    www.aol.com/news/very-cold-weather-coming-us...

    The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar vortex invasions, meteorologists warn. And it will stay frozen there all ...