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A sun dog (or sundog) or mock sun, also called a parhelion [1] (plural parhelia) in atmospheric science, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Sun. Two sun dogs often flank the Sun within a 22° halo.
A crisp parhelic circle (horizontal line) over South Pole Station. Photo: John Bortniak, NOAA, January 1979. A halo display observed over the South Pole. Featured in the photo are several distinct phenomena: A parhelic circle (horizontal line), a 22° halo (circle) with two sundogs (bright spots), and an upper tangent arc.
Vädersolstavlan (Swedish for 'The Sundog Painting '; pronunciation ⓘ) is an oil-on-panel painting depicting a halo display, an atmospheric optical phenomenon, observed over Stockholm on 20 April 1535. It is named after the sun dogs (Swedish: Vädersol, lit. 'weather sun') appearing on the upper right part of the painting.
Atmospheric optical phenomena include: Afterglow; Airglow; Alexander's band, the dark region between the two bows of a double rainbow. Alpenglow; Anthelion; Anticrepuscular rays; Aurora (northern and southern lights, aurora borealis and aurora australis) Belt of Venus; Brocken Spectre; Circumhorizontal arc; Circumzenithal arc; Cloud iridescence ...
A satellite orbiting hundreds of miles above Earth recently captured rare images of an atmospheric phenomenon that makes Antarctica glaciers appear to be smoking. The wisps of "sea smoke" blowing ...
Lowly visible lines going up and down from the side sun are most likely Lowitz's arcs. A Lowitz arc is an optical phenomenon that occurs in the atmosphere; specifically, it is a rare type of ice crystal halo that forms a luminous arc which extends inwards from a sun dog (parhelion) and may continue above or below the sun.
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Atmospheric Rivers. This headline-making phenomenon has been drenching parts of the West Coast lately — but what, exactly, is an atmospheric river?