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The article says "In fact, polar regions typically get more light throughout the year than regions located closer to the equator."
But what does "more light" mean? Higher annual total insolation in watts? Or (as I suspect) more hours of non-darkness? Either way it should be clarified, and hopefully quantified. Chondrite 16:17, 15 September 2006 (UTC)
I remember something about villages south of the arctic circle, but experiencing polar nights due to being north of mountains, which put the whole village in shadow. I suppose it's probably more of a twilight than a night, but it might be worth mentionning. —The preceding unsigned comment was added by M0ffx (talk • contribs).
How many 'pure' Astronomical Polar Nights are there at each pole? --75.165.4.183 (talk) 18:19, 24 December 2006 (UTC) Jason Colberg
One per year right, and it's the same for both. --24.22.218.247 (talk) 01:54, 13 August 2007 (UTC)
@ 203.206.135.34 (talk) - It seems that the city name is unknown, but I could make a pretty good guess that it's Oslo as the original author is from Norway. Also, since the article is about the polar night and independent of a specific location, it shouldn't matter too much, but thanks for pointing it out. Set Sail For The Seven Seas 185° 44' 30" NET 12:22, 8 September 2009 (UTC)
@ 203.206.135.34 (talk) - After a bit of looking the categories that the photo has been placed in, it seems that this is the city of Tromsø. Also, the bridge confirms this as it located near the city. I'll add this to the photo. Set Sail For The Seven Seas 248° 35' 30" NET 16:34, 8 September 2009 (UTC)
Would be nice if there were an explanation of what actually causes the extreme variance in daylight cycles in polar regions. 75.161.248.110 (talk) 09:36, 29 January 2013 (UTC)
The polar day/night cycle where roughly 6 months of daylight follows 6 months of darkness is due to the fact that in addition to daily rotation to the central Sun,over the course of a year our planet has another surface rotation to the central Sun due solely to the orbital behavior of the Earth.If you look at the planet Uranus and its unique features,you will see it turns South to North as a consequence of its daily rotation along the line of its rings but also turn East to West as a component of its orbital motion - http://londonastronomer.files.wordpress.com/2013/01/uranus_2001-2007.jpg
Applied to our planet,a person standing on the South pole will turn 360 degrees to the central Sun and take an entire year to do so.When mixed together with daily rotation at lower latitudes this becomes the seasons so this explanation displaces the old and awkward 'tilt' explanation to the Sun as obviously it is impossible to explain the polar day/night cycle using that 'tilt' notion. Orion216 (talk) 07:14, 28 October 2013 (UTC)
If you stand still at the South Pole you will find yourself turning approximately 360 degrees every day. The only way that you could possibly find it taking an entire year is if the Earth were to keep one face toward the sun much as the moon keeps one face toward the Earth. 65.68.190.169 (talk) 06:58, 21 April 2015 (UTC)
There doesn't really seem to be any polar night in Vorkuta during the 5th of January, It's more southern than Kiruna and polar night in Kiruna ends at the 1st of January. SuperHypercane (talk) 19:54, 11 December 2013 (UTC)
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Being uncertain what "wikt:free horizon" means, i linked it to its article and found that that creates a red link. My bet is that "free horizon" relative to an observer means either
Since the earth is tilted 23.44°, and true night starts when the sun is 24° below the horizon, latitudes > than 42°34’ north or south of equator, complete darkness does not occur on the summer solstice, whereas latitudes > than 89°26’ north or south of equator, complete darkness does not occur on the winter solstice or within a half degree of either pole. So therefore Emerald Campus twilight can last night around the winter solstice at the poles. Emerald Campus Twilight is when the sun is between 18 and 24 degrees below the horizon.
98.31.29.4 (talk) 04:13, 15 December 2020 (UTC)
Ok, since the sky is completely dark when the sun is more than 18° below the horizon not 24°, so in that case how long does astronomical polar night last for at north and south poles? what dates, sunrise is on the vernal equinox and sunset is on the autumnal equinox, the transition between 6 months of polar day and 6 months of polar night at the poles happen at the equinoxes. --98.31.29.4 (talk) 17:34, 16 December 2020 (UTC)
I start with the caveat that I don’t have time to make these edits myself, but I came to this page hoping for more description on how humans interact under polar night conditions. I had a few thoughts on how this page might might be improved:
- expanding a “mental health effects of polar night” subsection;
- a section on service provision in polar night conditions: I would imagine, for example, that virtually all public services - everything from postal delivery to park maintenance - have made lighting/ safety/ practicality operational changes to adapt to low light conditions;
- crime: someone, somewhere has to have written an academic paper with the hypothesis that crime is either higher under the atypical mental health conditions imposed by polar night, or that crime is simply harder to convict on due to low light conditions. 2603:7000:3D00:1882:9942:11F4:8E21:2E71 (talk) 12:24, 22 January 2024 (UTC)
This article was the subject of a Wiki Education Foundation-supported course assignment, between 19 February 2024 and 18 March 2024. Further details are available on the course page. Student editor(s): Ail39 (article contribs).
— Assignment last updated by Ail39 (talk) 04:36, 28 February 2024 (UTC)