Arctic Circle

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Arctic Circle,

imaginary circle on the surface of the earth at 66 1-2°N latitude, i.e., 23 1-2° south of the North Pole. It marks the northernmost point at which the sun can be seen at the winter solsticesolstice
[Lat.,=sun stands still], in astronomy, either of the two points on the ecliptic that lie midway between the equinoxes (separated from them by an angular distance of 90°).
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 (about Dec. 22) and the southernmost point of the northern polar regions at which the midnight sunmidnight sun,
phenomenon in which the sun remains visible in the sky continuously for 24 hr or longer, occurring only in the polar regions. The midnight sun is due to the fact that the plane of the earth's equator is tilted about 23 1-2° to the plane of the ecliptic (the
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 is visible.

Arctic Circle

[¦ärd·ik ′sər·kəl]
(geodesy)
The parallel of latitude 66°32′N (often taken as 66½°N).

Arctic Circle

the imaginary circle round the earth, parallel to the equator, at latitude 66° 32ʹ N; it marks the northernmost point at which the sun appears above the level of the horizon on the winter solstice
References in periodicals archive ?
It is a harbinger of what is likely happening in other circumpolar arctic deltas, where little is known about the impact of global warming.
There are 19 polar bear populations in the circumpolar Arctic containing an estimated total of 20,000 to 25,000 bears.
What does the future hold for transnational cooperation in the circumpolar Arctic, and does the experience of this region hold lessons for those interested in regionalism more generally?
Dan White, director of the University of Alaska Fairbanks (UAF) Institute of Northern Engineering, says UAF specializes in circumpolar Arctic engineering and has worked in Russia and Canada as well as Alaska.
Aquatic ecosystem changes across the circumpolar Arctic were found to occur in the late-19th and early 20th centuries.
Our objective was to describe STI trends in the circumpolar Arctic, focusing on the North American continent (United States, Canada, and Greenland).
Comparison of selected Indian viruses with representative rabies viruses recovered worldwide showed a close association of all Indian isolates with the circumpolar Arctic rabies lineage distributed throughout northern latitudes of North America and Europe and other viruses recovered from several Asian countries.
ANWR is truly everyone's crown jewel, not just the crown jewel of the circumpolar Arctic from a greenie point of view; it's also a crown jewel of the whole petroleum industry in the circumpolar Arctic," explains Becky Gay, executive director of the Alaska Resource Development Council.