Anti-cyclone

Anti-Cyclone- A high-pressure system featuring clock-wise winds.
Arctic Air- A mass of very dry, very cold air that develops over the snow-and-ice-covered regions of the Far North.
Atmosphere- The mass of air surrounding the Earth.

Air masses are affected by the general atmospheric pressure within the mass, creating areas of high pressure (anti-cyclones) and low pressure (depressions).

See also: Molecules, Millibars, Barometer, Atmospheric pressure, Isobar