Aurorae - Northern Lights
Aurora polaris (ger: Polarlicht; fr: aurore polaire) ...
Northern Lights - see Aurora Borealis
Nowcasting - short-term weather forecasting for the near future, generally from minutes up to a few hours in the future ...
Northern Lights- Also known as the aurora borealis. The luminous, radiant emission from the upper atmosphere over middle and high latitudes, and centered around the earth's magnetic poles.
Also known as the northern lights; the luminous, radiant emission from the upper atmosphere over middle and high latitudes, and centred around the earth's magnetic poles.
Aurora Borealis: Northern Lights.
Automated Weather Report: A weather observation (REPORT) taken by an automatic weather station.
Aurora Borealis - It's often called the "northern lights". It occurs 50 to 100 miles above the earth, when energetic particles from a solar storm cause the gases in the upper atmosphere to glow. Auroras can last between a few minutes to several hours.
Aurora Borealis
(Northern Lights) Aurora of the Northern Hemisphere.
Avalanche
Mass of snow and ice falling suddenly down a mountain slope and often taking with it earth, rocks, and rubble of every description.
Auroraphobia The fear of the Northern Lights.
Automated Local Evaluation in Real Time (ALERT) A local flood warning system where river and rainfall data area collected via radio signals in real-time at an ALERT base station.
Auroraphobia: The fear of the Northern Lights.
Autocorrelation: A measure of similarity between displaced and undisplaced (in time, space, etc.) versions of the same function.
Aurora borealis- A colorful, glowing display in the sky caused when particles from the sun strike oxygen and nitrogen atoms in the ionosphere; also called the Northern Lights.
Barometer- An instrument used to measure changes in air pressure.
aurora—A luminous, radiant emission over middle and high latitudes confined to the thin air of high altitudes and centered over the earth's magnetic poles. Called “aurora borealis' (northern lights) or “ ...
Aurora Glowing light display in the nighttime sky caused by excited gases in the upper atmosphere giving off light. In the Northern Hemisphere it is called the aurora borealis (northern lights); in the Southern Hemisphere, ...
A glowing light display in the night-time sky caused by excited gases in the upper atmosphere. In the Southern Hemisphere it is called the Aurora Australis or Southern Lights, in the Northern Hemisphere Aurora Borealis (Northern Lights).
Autumn ...
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Anticyclonic Rotation, Aurora Australis, Aurora Borealis, Coriolis force, Northern Lights, NRN
Also listed in ...
It is seen as a bright display of constantly changing light near the magnetic poles of each hemisphere. In the Northern Hemisphere, it is known as the aurora borealis or Northern Lights, and in the Southern Hemisphere, ...
Extremely thin air at these altitudes is exited by the solar radiation causing the gas to become ionized. AURORAS occur when these ions are affected by the earth's magnetic field near the poles. The NORTHERN LIGHTS are an example of an aurora.
In the Northern Hemisphere, it is known as the aurora borealis or Northern Lights, and in the Southern Hemisphere, this phenomena is called the aurora australis.
 See also: Light, Norther, Earth, Weather, Aurora Borealis
  
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