Arctic Air (A):
Continental arctic (cA): Extremely cold temperatures and very little moisture. Originating over the Arctic ocean in winter, when high pressure dominates and differs only slightly from the continental polar (cP) air masses that develop over Siberia and northern Canada.
Arctic Air- a mass of very cold, dry air that usually originates over the Arctic Ocean north of Canada and Alaska.
Arctic High- a very cold high pressure that originates over the Arctic Ocean.
arctic air mass
mass of very cold air in the arctic regions which invades lower latitudes at irregular intervals.
Mass of air in the Arctic Regions, very cold in the lower levels, which invades lower latitudes at irregular intervals.
Front which separates cold Arctic air originating at high northern latitudes from relatively warm polar air.
Arctic air A very cold and dry air mass that forms primarily in winter and the northern interior of North America.
Atmospheric window A region of the electromagnetic spectrum from 8 to 12 µm where the atmosphere is transparent to radiation.
~—An air mass with characteristics developed mostly in winter over Arctic surfaces of ice and snow. ~ extends to great heights, and the surface temperatures are basically, but not always, lower than those of polar air.
An air mass that develops around the Arctic, it is characterized by being cold from surface to great heights. The boundary of this air mass is often defined by the Arctic front, a semi-permanent, semi-continuous feature.
~ masses are typically very shallow and have been known to produce devastating ice storms. Behind a cold front, the air mass is maritime polar (mP), but behind an Arctic front, the air mass is continental polar (cP).
A daily index of geomagnetic activity derived as the average of the eight 3-hourly a indices.
~ - An air mass that originates over Canada and brings us cold temperatures.
Atmosphere - A layer of gases surrounding a planet. The Earth's atmosphere is divided into five layers: exosphere, thermosphere, mesosphere, stratosphere, and troposphere.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Air mass, AMS, C AMS, K AMS, WDLY
AAWU - permalink - collapse ...
~- 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.
Antarctic Air: Mass of air originating in the Antarctic Continent. It is cold and dry in all seasons of the year.
Continental ~ mass - very cold dry air. Siberia.
Air mass thunderstorm - a garden variety storm which causes little if any damage. It occurs a considerable distance from any front.
Air pollutant - anthropogenic or otherwise unusual substance in the air. Usually harmful.
Continental ~ mass An air mass characterized by extremely low temperatures and very dry air.
Continental polar air mass An air mass characterized by low temperatures and dry air. Not as cold as ~ masses.
It moves quickly across the northern United States, often bring gusty winds and cold ~. ALEUTIAN LOW A semi-permanent, subpolar area of low pressure located in the Gulf of Alaska near the Aleutian Islands.
In the northern winter, high-pressure systems (called Canadian highs or ~ masses) often migrate to midlatitude regions such as the North American upper Midwest, New England, and northern Europe. These create cold snaps where unseasonably cold and sunny weather are observed.
Arctic Front - The boundary or front separating deep, cold ~ from shallower, relatively less cold polar air. The overrunning of air above this boundary often provides a mechanism for lift.
If cold air is pushing in from the Arctic, displacing the warm air, then the leading edge of the ~ mass is called a cold front. If cold air is retreating, allowing warm air to move in, then the leading edge of the warmer air mass is called a warm front.
A small whirling storm over water which can either be spawned from the base of a thunderstorm, or formed in a cold outbreak of ~. They are similar, but generally no as severe as tornadoes.
Wave Direction ...
A type of fog that forms when an outbreak of cold ~ settles over an expanse of open, relatively warmer water (See sea smoke, arctic sea smoke and advection fog, or sea fog)
Storm Force Wind
Wind speed of 48 to 63 knots inclusive, with a Beaufort wind force of 10 to 11.
Storm Surge ...
Outflow Winds - Winds that blow down fjords and inlets from the land to the sea. When cold ~ flows from the interior of BC onto the coast, the windspeeds through mainland inlets can reach over 100 km/h.
Ice Fog - Fog composed of ice crystals instead of water droplets. Ice fog forms when clear and calm conditions prevail in extremely cold ~.
Not as severe as frostbite, this distress is primarily the result of the contraction in the blood vessels near the surface of the skin. The medical term used for this condition is "acrocyanosis." Perhaps in reaction to the ~ mass this week, ...
Note that in daily weather forecasting, a 1-day forecast could sometimes be assigned with such certainty (at least when rounded to multiples of 5), such as a 100% probability of below-normal temperature in an ~ mass that is expected to occupy a region for several days.
See also: What is the meaning of Air, Arctic, Temperature, Air mass, Pressure?