WHERE DOES THE POLAR NIGHT BEGIN?

• Published in: The Canadian Geographer/Le Géographe canadien
• Main Author: BURN, C.R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1995
• Subjects: Arctic; Canada; Lever; Svalbard; Arctique*; polar night
• Online Access: http://dx.doi.org/10.1111/j.1541-0064.1995.tb00401.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1541-0064.1995.tb00401.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1541-0064.1995.tb00401.x

The Arctic Circle is popularly thought to demarcate the latitude at which darkness is continuous during the winter solstice. The Circle is defined where the minimum zenith angle to the centre of the Sun is 90° on 21 /22 December. Sunrise and sunset occur when the centre of the Sun is at a zenith ang...