WHERE DOES THE POLAR NIGHT BEGIN?
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...
Published in: | The Canadian Geographer/Le Géographe canadien |
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Language: | English |
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Online Access: | https://ir.library.carleton.ca/pub/1243 https://doi.org/10.1111/j.1541-0064.1995.tb00401.x |
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ftcarletonunivir:oai:carleton.ca:1243 2023-05-15T15:02:10+02:00 WHERE DOES THE POLAR NIGHT BEGIN? Burn, C. (Christopher R.) 1995-01-01 https://ir.library.carleton.ca/pub/1243 https://doi.org/10.1111/j.1541-0064.1995.tb00401.x en eng https://ir.library.carleton.ca/pub/1243 doi:10.1111/j.1541-0064.1995.tb00401.x info:eu-repo/semantics/article 1995 ftcarletonunivir https://doi.org/10.1111/j.1541-0064.1995.tb00401.x 2022-02-06T21:52:02Z 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 angle of 90°50′, and therefore the Sun is observed at the Arctic Circle throughout the year. Night begins at the end of twilight, sometime after sunset. The limiting zenith angle for civil twilight is 96°, for nautical twilight 102°, and for astronomical twilight 108°. In the northern winter 24‐hour night is not experienced at latitudes south of 72°33′, and astronomical polar night is not observed at any point on the Earth's land surface. Only five settlements, two in Canada, two in Russia, and one in Svalbard are within the limit of nautical polar night. Le cercle arctique est populairement associéà la limite latitudinale à laquelle la noirceur est continue durant le solstice ďhiver. Le cercle est défini là où la distance zénithale minimum au centre du soleil est 90° le 21 /22 décembre. Le lever et le coucherdu soleil ont lieu lorsque le centre du soleil est à une distance zénithale de 90°50′ pour cette raison le soleil se lève et se couche au cercle arctique durant toute ľannée. La nuit commence à la fin du crépuscule, quelque temps après le coucher du soleil. La distance zénithale limite pour le crépuscle civil est 96°, 102° pour le crépuscle nautique et 108° pour le crépuscle astronomique. Durant ľhiver nordique, la nuit de 24 heures ne se produitpas aux latitudes au sud de 72°33′ et la nuit polair astronomique n'est observeéà aucun point sur la surface terrestre. Seules cinq stations, deux au Canada, deux en Russie et un en Svalbard se trouvent àľintérieur de la limite de la nuit polaire nautique. Copyright Article in Journal/Newspaper Arctic Arctique* polar night Svalbard Carleton University's Institutional Repository Arctic Svalbard Canada Lever ENVELOPE(-63.608,-63.608,-65.506,-65.506) The Canadian Geographer/Le Géographe canadien 39 1 68 74 |
institution |
Open Polar |
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Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
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English |
description |
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 angle of 90°50′, and therefore the Sun is observed at the Arctic Circle throughout the year. Night begins at the end of twilight, sometime after sunset. The limiting zenith angle for civil twilight is 96°, for nautical twilight 102°, and for astronomical twilight 108°. In the northern winter 24‐hour night is not experienced at latitudes south of 72°33′, and astronomical polar night is not observed at any point on the Earth's land surface. Only five settlements, two in Canada, two in Russia, and one in Svalbard are within the limit of nautical polar night. Le cercle arctique est populairement associéà la limite latitudinale à laquelle la noirceur est continue durant le solstice ďhiver. Le cercle est défini là où la distance zénithale minimum au centre du soleil est 90° le 21 /22 décembre. Le lever et le coucherdu soleil ont lieu lorsque le centre du soleil est à une distance zénithale de 90°50′ pour cette raison le soleil se lève et se couche au cercle arctique durant toute ľannée. La nuit commence à la fin du crépuscule, quelque temps après le coucher du soleil. La distance zénithale limite pour le crépuscle civil est 96°, 102° pour le crépuscle nautique et 108° pour le crépuscle astronomique. Durant ľhiver nordique, la nuit de 24 heures ne se produitpas aux latitudes au sud de 72°33′ et la nuit polair astronomique n'est observeéà aucun point sur la surface terrestre. Seules cinq stations, deux au Canada, deux en Russie et un en Svalbard se trouvent àľintérieur de la limite de la nuit polaire nautique. Copyright |
format |
Article in Journal/Newspaper |
author |
Burn, C. (Christopher R.) |
spellingShingle |
Burn, C. (Christopher R.) WHERE DOES THE POLAR NIGHT BEGIN? |
author_facet |
Burn, C. (Christopher R.) |
author_sort |
Burn, C. (Christopher R.) |
title |
WHERE DOES THE POLAR NIGHT BEGIN? |
title_short |
WHERE DOES THE POLAR NIGHT BEGIN? |
title_full |
WHERE DOES THE POLAR NIGHT BEGIN? |
title_fullStr |
WHERE DOES THE POLAR NIGHT BEGIN? |
title_full_unstemmed |
WHERE DOES THE POLAR NIGHT BEGIN? |
title_sort |
where does the polar night begin? |
publishDate |
1995 |
url |
https://ir.library.carleton.ca/pub/1243 https://doi.org/10.1111/j.1541-0064.1995.tb00401.x |
long_lat |
ENVELOPE(-63.608,-63.608,-65.506,-65.506) |
geographic |
Arctic Svalbard Canada Lever |
geographic_facet |
Arctic Svalbard Canada Lever |
genre |
Arctic Arctique* polar night Svalbard |
genre_facet |
Arctic Arctique* polar night Svalbard |
op_relation |
https://ir.library.carleton.ca/pub/1243 doi:10.1111/j.1541-0064.1995.tb00401.x |
op_doi |
https://doi.org/10.1111/j.1541-0064.1995.tb00401.x |
container_title |
The Canadian Geographer/Le Géographe canadien |
container_volume |
39 |
container_issue |
1 |
container_start_page |
68 |
op_container_end_page |
74 |
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1766334150272352256 |