![]() | The contents of the Polar mesospheric clouds page were merged into Noctilucent cloud on 19 December 2021. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | Noctilucent cloud has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it. | |||||||||
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![]() | On 11 December 2007, Noctilucent cloud was linked from Slashdot, a high-traffic website. ( Traffic) All prior and subsequent edits to the article are noted in its revision history. |
I added a link to a photograph of NLCs from Punta Arenas, maybe the only one image of a southern NLC taken from ground available on the net (also it's my first contribution to wikipedia :) -- nherm
It is mentioned in the main article that Manned Spaceflight is a contributing factor to the appearance of NLCs. Can someone please provide a reference for this conjecture? It is my understanding that at 82km altitude the intense UV-radiation from the sun dissociates water molecules very quickly. With half-life times of mere hours, its a little curious how these can be a contributing factor. Albester 18:14, 18 May 2006 (UTC)
Not sure how to indent a reply here (and the main article isn't editable by AC like me), but it looks like shuttle exhaust is more closely related to PMC/PMSE:
Stevens, M.H. et al., Antarctic mesospheric clouds formed from Space Shuttle exhaust, Geo. Res. Lett., 32, 2005.
Are you sure that the half-life is "mere hours" at the mesopause? The clouds are an almost permanent fixture in the polar summer, so I have a hard time believing that there's that much water being transported to that altitude. Also, here's a citation for the anthropogenic change "attribution needed":
Thomas, G., Are Noctilucent Clouds Harbingers of Global Change in the Middle Atmosphere?, Adv. Spc. Res., 32, 1737–1746, 2003. —Preceding unsigned comment added by 69.91.134.125 ( talk) 19:16, 8 November 2007 (UTC)
Noctilucent Clouds in Popular Culture:
Also title of a song by Jim Cole and title of song by The Chromatics
This is pure nonsense but I believe that noctilucent clouds are physical manifestations of planetary wisdom (composed of frozen mist, illuminating the night, closest to empty space, poorly understood, and able to subsist at altitudes other clouds can't cut it at. Keep up the good work brothers! -- 68.56.0.116 ( talk) 14:44, 11 December 2007 (UTC)
Does anybody know at which time of day, relative to sunset/sunrise, can noctilucent clouds be seen and on which latitudes? It would be nice to have graph displaying this in the article. -- 83.131.82.102 ( talk) 11:38, 9 March 2008 (UTC)
I don't know if any of this might help http://www.netweather.tv/forum/index.php?showtopic=46972 —Preceding unsigned comment added by 92.21.136.202 ( talk) 19:55, 18 June 2009 (UTC) also http://spaceweather.com/archive.php?view=1&day=18&month=06&year=2009
That's the short list. Thegreatdr ( talk) 17:18, 7 October 2008 (UTC)
Hi, I'll be reviewing the article. All I know about noctilucent clouds I learned on Slashdot. The review should be posted within a couple of days. Wronkiew ( talk) 16:21, 16 October 2008 (UTC)
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help)Nice work, I'm sure you'll have this fixed up in no time. I tried to be specific, but if you have any questions, just let me know. Wronkiew ( talk) 03:43, 18 October 2008 (UTC)
Article is GA quality. Nice work. Wronkiew ( talk) 04:49, 19 October 2008 (UTC)
I'd like to suggest that the search for polar mesospheric clouds not be automatically redirected to noctilucent clouds. Though the same tenuous ice crystal layer in the mesophere produces both physical phenomena, noctilucent clouds are the phenomena observed from the ground and polar mesospheric clouds are the scattering layer observed by satellite and LIDAR instrumentation. It is a subtle, but important distinction. I created a new article called Polar Mesospheric Clouds last night and would appreciate help writing and editing it.—Preceding unsigned comment added by Rss100001 ( talk • contribs)
http://spaceweather.com/archive.php?view=1&day=18&month=06&year=2009
http://www.newscientist.com/article/dn17234-mysterious-nightshining-clouds-may-peak-this-year.html —Preceding unsigned comment added by 81.132.14.185 ( talk) 07:44, 19 June 2009 (UTC)
I suggest including a reference to increased prevalence of noctilucent clouds during solar minima in the article, since there is considerably more evidence for this than for increased prevalence due to climate change. Not to discount that possibility as well, of course, but having every imaginable kind of aberration that occurs being attributed to climate change is getting a little tedious and is damaging the credibility of climatology.
TwoGunChuck ( talk) 18:09, 12 August 2009 (UTC)
Two photos in different sections are near-duplicates. Remove one? Cognita ( talk) 05:54, 30 June 2009 (UTC)
The first observation statement (first in section Discovery and investigation):
is extremely unlikely! The source says:
(my underlinings indicating the invalid citation usage) but living in Sweden and accidentally observing them every other summer, I think we should disregard that statement as speculative nonsense. It's infinitely more likely some Scandinavian, some Russian or Canadian scientist noted them much earlier. ... said: Rursus ( bork²) 13:30, 14 July 2009 (UTC)
Hello! This is a note to let the editors of this article know that File:Helkivad ööpilved Kuresoo kohal.jpg will be appearing as picture of the day on March 22, 2012. You can view and edit the POTD blurb at Template:POTD/2012-03-22. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! ~ AH1 ( discuss!) 01:48, 22 March 2012 (UTC)
A recent article I found on science daily, referencing a NASA report where the investigators/authors believe that 3 things are needed to form NLCs are cold temps, water vapor and space dust. Here is the citation info copied from the sciencedaily page: NASA/Goddard Space Flight Center. "Appearance of night-shining clouds has increased." ScienceDaily. ScienceDaily, 11 April 2014. <www.sciencedaily.com/releases/2014/04/140411091939.htm>. Just passing this along. Accidental contributor ( talk) 06:10, 7 May 2014 (UTC)
A Wikipedia editor had provided a link to a site by the Australian Government Antarctic Division ( http://www.antarctica.gov.au/about-antarctica/environment/atmosphere/noctilucent-clouds). I removed the link because within the story itself the same comment was only provided as conjecture with no source data to back it up. To whit, the article stated "It has been alternatively claimed that the appearance of noctilucent clouds is the earliest evidence of anthropogenic climate change." This was the identical text within the Wikipedia entry and with no source links or evidence to back up the claim. These clouds have been observed since the 19th century, before the time that industrialization could have been claimed to cause anthropogenic global warming. As was stated above in the talk section, they were not recorded before because up until that time there was no reason to suspect these clouds were different than normal cirrus clouds other than in luminosity. This does not mean they did not exist prior to 1885, just as we cannot say atoms did not exist prior to the 19th century just because we did not have the means or science to measure or even theorize them. — Preceding unsigned comment added by Herefordnuthouse ( talk • contribs) 15:03, 31 May 2014 (UTC)
Basically the same subject. Pierre cb ( talk) 13:36, 1 August 2021 (UTC)
![]() | The contents of the Polar mesospheric clouds page were merged into Noctilucent cloud on 19 December 2021. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | Noctilucent cloud has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it. | |||||||||
|
![]() | This ![]() It is of interest to the following WikiProjects: | |||||||||||||||||||||||
|
![]() | On 11 December 2007, Noctilucent cloud was linked from Slashdot, a high-traffic website. ( Traffic) All prior and subsequent edits to the article are noted in its revision history. |
I added a link to a photograph of NLCs from Punta Arenas, maybe the only one image of a southern NLC taken from ground available on the net (also it's my first contribution to wikipedia :) -- nherm
It is mentioned in the main article that Manned Spaceflight is a contributing factor to the appearance of NLCs. Can someone please provide a reference for this conjecture? It is my understanding that at 82km altitude the intense UV-radiation from the sun dissociates water molecules very quickly. With half-life times of mere hours, its a little curious how these can be a contributing factor. Albester 18:14, 18 May 2006 (UTC)
Not sure how to indent a reply here (and the main article isn't editable by AC like me), but it looks like shuttle exhaust is more closely related to PMC/PMSE:
Stevens, M.H. et al., Antarctic mesospheric clouds formed from Space Shuttle exhaust, Geo. Res. Lett., 32, 2005.
Are you sure that the half-life is "mere hours" at the mesopause? The clouds are an almost permanent fixture in the polar summer, so I have a hard time believing that there's that much water being transported to that altitude. Also, here's a citation for the anthropogenic change "attribution needed":
Thomas, G., Are Noctilucent Clouds Harbingers of Global Change in the Middle Atmosphere?, Adv. Spc. Res., 32, 1737–1746, 2003. —Preceding unsigned comment added by 69.91.134.125 ( talk) 19:16, 8 November 2007 (UTC)
Noctilucent Clouds in Popular Culture:
Also title of a song by Jim Cole and title of song by The Chromatics
This is pure nonsense but I believe that noctilucent clouds are physical manifestations of planetary wisdom (composed of frozen mist, illuminating the night, closest to empty space, poorly understood, and able to subsist at altitudes other clouds can't cut it at. Keep up the good work brothers! -- 68.56.0.116 ( talk) 14:44, 11 December 2007 (UTC)
Does anybody know at which time of day, relative to sunset/sunrise, can noctilucent clouds be seen and on which latitudes? It would be nice to have graph displaying this in the article. -- 83.131.82.102 ( talk) 11:38, 9 March 2008 (UTC)
I don't know if any of this might help http://www.netweather.tv/forum/index.php?showtopic=46972 —Preceding unsigned comment added by 92.21.136.202 ( talk) 19:55, 18 June 2009 (UTC) also http://spaceweather.com/archive.php?view=1&day=18&month=06&year=2009
That's the short list. Thegreatdr ( talk) 17:18, 7 October 2008 (UTC)
Hi, I'll be reviewing the article. All I know about noctilucent clouds I learned on Slashdot. The review should be posted within a couple of days. Wronkiew ( talk) 16:21, 16 October 2008 (UTC)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link){{
cite journal}}
: Unknown parameter |month=
ignored (
help)CS1 maint: multiple names: authors list (
link){{
cite journal}}
: Unknown parameter |month=
ignored (
help){{
cite book}}
: Unknown parameter |coauthor=
ignored (|author=
suggested) (
help)Nice work, I'm sure you'll have this fixed up in no time. I tried to be specific, but if you have any questions, just let me know. Wronkiew ( talk) 03:43, 18 October 2008 (UTC)
Article is GA quality. Nice work. Wronkiew ( talk) 04:49, 19 October 2008 (UTC)
I'd like to suggest that the search for polar mesospheric clouds not be automatically redirected to noctilucent clouds. Though the same tenuous ice crystal layer in the mesophere produces both physical phenomena, noctilucent clouds are the phenomena observed from the ground and polar mesospheric clouds are the scattering layer observed by satellite and LIDAR instrumentation. It is a subtle, but important distinction. I created a new article called Polar Mesospheric Clouds last night and would appreciate help writing and editing it.—Preceding unsigned comment added by Rss100001 ( talk • contribs)
http://spaceweather.com/archive.php?view=1&day=18&month=06&year=2009
http://www.newscientist.com/article/dn17234-mysterious-nightshining-clouds-may-peak-this-year.html —Preceding unsigned comment added by 81.132.14.185 ( talk) 07:44, 19 June 2009 (UTC)
I suggest including a reference to increased prevalence of noctilucent clouds during solar minima in the article, since there is considerably more evidence for this than for increased prevalence due to climate change. Not to discount that possibility as well, of course, but having every imaginable kind of aberration that occurs being attributed to climate change is getting a little tedious and is damaging the credibility of climatology.
TwoGunChuck ( talk) 18:09, 12 August 2009 (UTC)
Two photos in different sections are near-duplicates. Remove one? Cognita ( talk) 05:54, 30 June 2009 (UTC)
The first observation statement (first in section Discovery and investigation):
is extremely unlikely! The source says:
(my underlinings indicating the invalid citation usage) but living in Sweden and accidentally observing them every other summer, I think we should disregard that statement as speculative nonsense. It's infinitely more likely some Scandinavian, some Russian or Canadian scientist noted them much earlier. ... said: Rursus ( bork²) 13:30, 14 July 2009 (UTC)
Hello! This is a note to let the editors of this article know that File:Helkivad ööpilved Kuresoo kohal.jpg will be appearing as picture of the day on March 22, 2012. You can view and edit the POTD blurb at Template:POTD/2012-03-22. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! ~ AH1 ( discuss!) 01:48, 22 March 2012 (UTC)
A recent article I found on science daily, referencing a NASA report where the investigators/authors believe that 3 things are needed to form NLCs are cold temps, water vapor and space dust. Here is the citation info copied from the sciencedaily page: NASA/Goddard Space Flight Center. "Appearance of night-shining clouds has increased." ScienceDaily. ScienceDaily, 11 April 2014. <www.sciencedaily.com/releases/2014/04/140411091939.htm>. Just passing this along. Accidental contributor ( talk) 06:10, 7 May 2014 (UTC)
A Wikipedia editor had provided a link to a site by the Australian Government Antarctic Division ( http://www.antarctica.gov.au/about-antarctica/environment/atmosphere/noctilucent-clouds). I removed the link because within the story itself the same comment was only provided as conjecture with no source data to back it up. To whit, the article stated "It has been alternatively claimed that the appearance of noctilucent clouds is the earliest evidence of anthropogenic climate change." This was the identical text within the Wikipedia entry and with no source links or evidence to back up the claim. These clouds have been observed since the 19th century, before the time that industrialization could have been claimed to cause anthropogenic global warming. As was stated above in the talk section, they were not recorded before because up until that time there was no reason to suspect these clouds were different than normal cirrus clouds other than in luminosity. This does not mean they did not exist prior to 1885, just as we cannot say atoms did not exist prior to the 19th century just because we did not have the means or science to measure or even theorize them. — Preceding unsigned comment added by Herefordnuthouse ( talk • contribs) 15:03, 31 May 2014 (UTC)
Basically the same subject. Pierre cb ( talk) 13:36, 1 August 2021 (UTC)