Go Back   Freethought Forum > The Marketplace > The Sciences

Reply
 
Thread Tools Display Modes
  #51  
Old 05-21-2010, 03:24 AM
Shake's Avatar
Shake Shake is offline
mostly harmless
 
Join Date: Jul 2004
Gender: Male
Posts: VDCXCI
Images: 13
Default Re: Atmospheric optical phenomena

Ach! ES beat me to it with the fogbow pic. I was looking back through the archive 'cause I remembered having seen it recently, only to find it'd already been posted. Oh well, here's another sun pillar like the ones in the op:


(also from APOD, btw).

Of course, then there's also lenticular clouds:


From APOD:Explanation: Are those UFOs near that mountain? No -- they are multilayered lenticular clouds. Moist air forced to flow upward around mountain tops can create lenticular clouds. Water droplets condense from moist air cooled below the dew point, and clouds are opaque groups of water droplets. Waves in the air that would normally be seen horizontally can then be seen vertically, by the different levels where clouds form. On some days the city of Seattle, Washington, USA, is treated to an unusual sky show when lenticular clouds form near Mt. Rainier, a large mountain that looms just under 100 kilometers southeast of the city. This image of a spectacular cluster of lenticular clouds was taken last December.
__________________
Through with oligarchy? Ready to get the money out of politics? Want real progressives in office who will work for the people and not the donors?

Reply With Quote
Thanks, from:
ceptimus (05-21-2010), Corona688 (10-14-2011), Crumb (05-21-2010), Doctor X (05-21-2010), Watser? (05-21-2010)
  #52  
Old 05-21-2010, 06:47 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XMVDCLIX
Images: 28
Default Re: Atmospheric optical phenomena

One interesting thing about lenticular clouds is that they stay in the same place over the ground, even when a strong wind is blowing! The air has to be stable and flowing in a smooth laminar manner without much vertical mixing for these clouds to form.

When the wind is deflected upwards by a mountain range, or sometimes by a weather front, standing waves form in the air downwind of the obstruction. It's a bit like the 'stationary' ripples you sometimes see in a river, downstream of a rock - but because the air is an elastic medium the waves are much higher than the mountains that form them - sometimes up to ten times higher.

If the air is moist then droplets of water condense as the air rises and cools, then the drops evaporate again as the air falls and warms - so the clouds sit on the top of the atmospheric waves. The wind is blowing straight through the clouds at perhaps 50mph or more - the cloud is constantly forming at the leading edge and evaporating at the trailing one. As long as the wind conditions remain constant, then the waves stay in the same place relative to the mountains that formed them - hence the 'standing cloud' effect.

Glider pilots who are aiming to fly high love these wave conditions - I've soared in gliders along the edges of these clouds, sometimes with one wing slicing through cloud and the other out in bright sunlight! Up close they look magnificent.

Glider pilots have soared to over 40,000 feet using this wave lift! I've never been that high though - even in the fifteen to twenty thousand feet height range we are able to reliably reach here in the UK (with our relatively small mountains), it's bloody cold, and you have to take bottles of oxygen with you! At over 40,000 feet, breathing pure oxygen isn't sufficient - you really need a pressure suit if you want to avoid injury and/or death.
Reply With Quote
Thanks, from:
Crumb (05-21-2010), Deadlokd (01-21-2011), Doctor X (05-21-2010), Pinecone (05-25-2010), S.Vashti (05-23-2010), Shake (05-24-2010)
  #53  
Old 05-24-2010, 09:33 PM
Shake's Avatar
Shake Shake is offline
mostly harmless
 
Join Date: Jul 2004
Gender: Male
Posts: VDCXCI
Images: 13
Default Re: Atmospheric optical phenomena

Very cool, cep! I did not know that.
__________________
Through with oligarchy? Ready to get the money out of politics? Want real progressives in office who will work for the people and not the donors?

Reply With Quote
  #54  
Old 06-24-2010, 02:57 AM
livius drusus's Avatar
livius drusus livius drusus is offline
Admin of THIEVES and SLUGABEDS
 
Join Date: Apr 2004
Posts: LVCCCLXXII
Images: 5
Default Re: Atmospheric optical phenomena

Aurora Australis Observed from the International Space Station (click for larger image):



Quote:
This striking aurora image was taken during a geomagnetic storm that was most likely caused by a coronal mass ejection from the Sun on May 24, 2010. The ISS was located over the Southern Indian Ocean at an altitude of 350 kilometers (220 miles), with the astronaut observer most likely looking towards Antarctica (not visible) and the South Pole.

The aurora has a sinuous ribbon shape that separates into discrete spots near the lower right corner of the image. While the dominant coloration of the aurora is green, there are faint suggestions of red left of image center. Dense cloud cover is dimly visible below the aurora. The curvature of the Earth’s horizon (the limb) is clearly visible, as is the faint blue line of the upper atmosphere directly above it (at image top center). Several stars appear as bright pinpoints against the blackness of space at image top right.
Reply With Quote
Thanks, from:
BrotherMan (06-24-2010), But (06-25-2010), ceptimus (06-24-2010), Deadlokd (01-21-2011), Ensign Steve (06-24-2010), JoeP (06-25-2010), Pan Narrans (06-24-2010), Shake (03-30-2012)
  #55  
Old 06-24-2010, 05:24 AM
BrotherMan's Avatar
BrotherMan BrotherMan is offline
Domo Arigato Mister Roborto
 
Join Date: Jan 2005
Location: Bortlandia
Gender: Male
Posts: XVCCXXVI
Blog Entries: 5
Images: 63
Default Re: Atmospheric optical phenomena

:nowai:
__________________
\V/_
I COVLD TEACh YOV BVT I MVST LEVY A FEE
Reply With Quote
  #56  
Old 06-25-2010, 04:00 AM
naturalist.atheist naturalist.atheist is offline
Reality Adventurer
 
Join Date: Jul 2007
Posts: VMMCXXVIII
Images: 7
Default Re: Atmospheric optical phenomena

One of the most obvious atmospheric optical phenomena would be the blue color of the sky.
Reply With Quote
  #57  
Old 06-26-2010, 08:04 AM
Dingfod's Avatar
Dingfod Dingfod is offline
Name Dropper
 
Join Date: Jul 2004
Location: In a Hole
Gender: Male
Posts: XLMMCCCLVII
Blog Entries: 21
Images: 92
Default Re: Atmospheric optical phenomena

amp;feature=related
Reply With Quote
Thanks, from:
ceptimus (06-26-2010), JoeP (06-26-2010)
  #58  
Old 07-04-2010, 01:11 PM
Dingfod's Avatar
Dingfod Dingfod is offline
Name Dropper
 
Join Date: Jul 2004
Location: In a Hole
Gender: Male
Posts: XLMMCCCLVII
Blog Entries: 21
Images: 92
Default Re: Atmospheric optical phenomena

1962. Honolulu. Fireworks in the sky. Nuclear fireworks. H-bombs in SPACE!

<embed src="http://www.npr.org/v2/?i=128170775&m=20128215149&t=video" height="386" wmode="opaque" type="application/x-shockwave-flash" allowFullScreen="true" width="400" base="http://www.npr.org"></embed>
Reply With Quote
Thanks, from:
Deadlokd (01-21-2011), S.Vashti (07-06-2010)
  #59  
Old 01-19-2011, 04:14 PM
Ensign Steve's Avatar
Ensign Steve Ensign Steve is offline
He's back! for your fucking cheetos
 
Join Date: Jul 2004
Location: Silicon Valley
Gender: Bender
Posts: XXMXDCCLXIX
Images: 66
Default Re: Atmospheric optical phenomena

__________________
:kiwf::smurf:
Reply With Quote
Thanks, from:
ceptimus (01-19-2011), curses (01-22-2011), Deadlokd (01-21-2011), Dingfod (01-25-2011), Kael (01-19-2011), Pan Narrans (01-19-2011), teasasue (01-27-2011), Zehava (01-18-2016)
  #60  
Old 01-21-2011, 03:21 AM
mulebear's Avatar
mulebear mulebear is offline
Some days it's not worth chewing through the straps.
 
Join Date: May 2005
Location: Georgia
Gender: Male
Posts: MCMLXXIII
Images: 30
Default Re: Atmospheric optical phenomena

This thread reminded me of this...


Anyway...

One of my favorites is Moon Rings.

Ring Around The Moon « Webner House
__________________
I will always :heart: Sonoma Bear
Reply With Quote
Thanks, from:
ceptimus (03-22-2012), Deadlokd (01-21-2011), Doctor X (01-21-2011), Watser? (01-26-2011)
  #61  
Old 01-21-2011, 10:34 AM
Doctor X Doctor X is offline
Member
 
Join Date: Feb 2007
Posts: XMVCCCIII
Default Re: Atmospheric optical phenomena

Some how, you just knew the video producer came from the South. . . .

--J.D.

P.S. The comments to that video are hilarious:

Quote:
dgreatll She has Gay Water :p

zupperm Oxygen supply? You mean the air?
Reply With Quote
Thanks, from:
mulebear (01-21-2011), Watser? (01-26-2011)
  #62  
Old 01-21-2011, 04:05 PM
mulebear's Avatar
mulebear mulebear is offline
Some days it's not worth chewing through the straps.
 
Join Date: May 2005
Location: Georgia
Gender: Male
Posts: MCMLXXIII
Images: 30
Default Re: Atmospheric optical phenomena

Same lady...

global warming n wireless energy - dboots - Greenpeace USA Blog

She's ranted on the net about a few other conspiracies. I get the impression that she may be schizophrenic and sees boogey men everywhere.

Apparently she had a video where she rants about the Moon possibly not being the Moon. I've been unable to find the video in question.





Oh... And here is a ring around the moon.

Love 'em.

__________________
I will always :heart: Sonoma Bear
Reply With Quote
  #63  
Old 10-13-2011, 03:31 PM
Ensign Steve's Avatar
Ensign Steve Ensign Steve is offline
He's back! for your fucking cheetos
 
Join Date: Jul 2004
Location: Silicon Valley
Gender: Bender
Posts: XXMXDCCLXIX
Images: 66
Default Re: Atmospheric optical phenomena



Quote:
Hovering in the sky, this rainbow cloud over Mount Everest took an astonished astronomer by surprise. Oleg Bartunov, 51, caught the spectacle on camera during a Himalayas expedition in Nepal. [840x962] (i.imgur.com)
Caption is copy-pasted directly from reddit. I have no idea about its veracity.
__________________
:kiwf::smurf:
Reply With Quote
Thanks, from:
BrotherMan (10-13-2011), ceptimus (10-13-2011), JoeP (10-13-2011), LadyShea (10-13-2011), Pan Narrans (10-13-2011), teasasue (10-18-2011), Watser? (10-29-2011), Ymir's blood (10-13-2011)
  #64  
Old 10-13-2011, 03:49 PM
Pan Narrans's Avatar
Pan Narrans Pan Narrans is offline
Born-again counter
 
Join Date: Oct 2007
Location: Utrecht, the Netherlands
Gender: Male
Posts: MXCCCLXXX
Default Re: Atmospheric optical phenomena

:prettycolors:

It looks legit (or at least, possible) to me. Cirrus clouds have been known to contain rainbow colors in the form of a halo, if their position with respect to the sun is right. Usually this creates more regular arcs, like the more familiar rainbow in liquid water droplets; I suppose the swirling colors in this picture may be due to the cloud having a wave-like shape, which isn't all that crazy near a big mountain range like the Himalayas.

It's a beautiful picture in any case.

ETA: This page has some more information on this kind of phenomenon. Eyeballing it, I'd say we have a particularly stunning iridescent cloud on our hands.

ETA2: Or perhaps a nacreous cloud. Sheesh, you'd think that after a couple of years of working on the radiative transfer of solar radiation by clouds I'd know this shit. Apparently not.
__________________
:beneluxmafia:

Last edited by Pan Narrans; 10-13-2011 at 04:04 PM.
Reply With Quote
Thanks, from:
ceptimus (03-22-2012), JoeP (10-13-2011), SR71 (01-18-2016)
  #65  
Old 10-13-2011, 03:56 PM
Ensign Steve's Avatar
Ensign Steve Ensign Steve is offline
He's back! for your fucking cheetos
 
Join Date: Jul 2004
Location: Silicon Valley
Gender: Bender
Posts: XXMXDCCLXIX
Images: 66
Default Re: Atmospheric optical phenomena

Oh, I didn't doubt the authenticity of the photo, I just have no idea whether the circumstances in the caption are real. Still, awesome picture no matter what.
__________________
:kiwf::smurf:
Reply With Quote
  #66  
Old 10-13-2011, 04:27 PM
JoeP's Avatar
JoeP JoeP is offline
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMMDCCXLVIII
Images: 18
Default Re: Atmospheric optical phenomena

I recognise the name Oleg Bartunov.

An Iridescent (Rainbow) Cloud in Himalaya | Flickr - Photo Sharing!

Quote:
An Iridescent Cloud in Himalaya, I observed early morning on October 18, 2009 from path to Khumjung, just 500 meters from road fork to Gokyo and Tengboche. I was ahead of my friends, so when I met my Annapurna buddy, who was going to Khunjung (to see Yeti scalp) I decided to go with him for a while. We sat on stones to talk and drink my green tea and suddenly I saw this spectacular phenomena . It was my first time I saw this phenomena and luckily I had my Nikon D90, so I was able to capture it. I called other people's attention (english wimin) to this, but not sure if they succeeded to capture it with their soap-camera. I was lucky also, because my friends didn't see anything. Turbulence, ice crystals in the low cloud and wonderful Himalaya produce this great picture. The mountain is Thamserku (6623 m).
I am intrigued by english wimin with soap-camera.
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur::sadcheer: "Strong and stable"
Reply With Quote
Thanks, from:
ceptimus (10-13-2011), Watser? (10-29-2011)
  #67  
Old 10-13-2011, 04:32 PM
JoeP's Avatar
JoeP JoeP is offline
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMMDCCXLVIII
Images: 18
Default Re: Atmospheric optical phenomena

Another one on his photostream:


Iridescent clouds in Himalaya by Oleg Bartunov, on Flickr

And:


Sunset cloud by Oleg Bartunov, on Flickr
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur::sadcheer: "Strong and stable"
Reply With Quote
Thanks, from:
ceptimus (10-13-2011), Doctor X (10-15-2011), Dragar (10-14-2011), Ensign Steve (10-13-2011), LadyShea (10-13-2011), Sauron (03-23-2012), Ymir's blood (10-13-2011)
  #68  
Old 10-13-2011, 10:32 PM
Ymir's blood's Avatar
Ymir's blood Ymir's blood is offline
Coffin Creep
 
Join Date: Sep 2004
Location: The nightmare realm
Posts: XXMXVI
Images: 67
Default Re: Atmospheric optical phenomena

Ensign Steve's photo has a giant polar bear cloud. :pbear:
__________________
Much of MADNESS, and more of SIN, and HORROR the soul of the plot.
Reply With Quote
Thanks, from:
ceptimus (12-21-2011), Ensign Steve (10-14-2011), JoeP (10-13-2011)
  #69  
Old 03-22-2012, 09:32 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XMVDCLIX
Images: 28
Default Re: Atmospheric optical phenomena

After saying in the OP that sundogs are more common than rainbows, I've been keeping a look out for them!

Okay, I'm outside more on showery days (good for rainbows) than I am just after sunrise on cold sunny mornings (good for sundogs) but I'm going to admit that my OP claim was wrong (for the UK anyway) as I'd not seen a good sundog since the OP until this week.

But on Tuesday morning, driving down the M40 to London at about 6:45 am, there was a beauty! :) Only on one side of the sun, but it was really clear. I didn't risk trying to photograph it while I was driving though, and by the time I got to the motorway service station where I could stop, it had gone. :(

Last edited by ceptimus; 03-22-2012 at 09:51 PM.
Reply With Quote
  #70  
Old 12-20-2013, 04:17 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XMVDCLIX
Images: 28
Default Re: Atmospheric optical phenomena



Light pillars over Finland
__________________

Reply With Quote
Thanks, from:
Crumb (12-21-2013), Dingfod (12-23-2013), Janet (12-20-2013), JoeP (12-20-2013), Pan Narrans (12-20-2013), slimshady2357 (12-20-2013), SR71 (12-20-2013), The Lone Ranger (12-20-2013), Watser? (01-17-2015)
  #71  
Old 04-20-2014, 12:59 AM
Dingfod's Avatar
Dingfod Dingfod is offline
Name Dropper
 
Join Date: Jul 2004
Location: In a Hole
Gender: Male
Posts: XLMMCCCLVII
Blog Entries: 21
Images: 92
Default Re: Atmospheric optical phenomena

"There's a big black circle in the sky with a ring around it.", 9-1-1 call audio with picture like the one below. Reminds me of the 9-1-1 call about rainbows in the lawn sprinklers being a gay conspiracy.

__________________
Sleep - the most beautiful experience in life - except drink.--W.C. Fields
Reply With Quote
Thanks, from:
ceptimus (01-18-2016), Janet (04-22-2014), JoeP (04-20-2014), Pan Narrans (04-20-2014), SR71 (04-20-2014)
  #72  
Old 01-17-2015, 08:14 PM
JoeP's Avatar
JoeP JoeP is offline
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMMDCCXLVIII
Images: 18
Default Re: Atmospheric optical phenomena

More light pillars in Finland:


building the Sagrada Familia in Ice by structuralice, on Flickr


building the Sagrada Familia in Ice by structuralice, on Flickr
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur::sadcheer: "Strong and stable"
Reply With Quote
Thanks, from:
ceptimus (01-17-2015), Crumb (01-18-2015), Ensign Steve (01-17-2015), Janet (01-17-2015), Pan Narrans (01-18-2015), Watser? (01-17-2015)
  #73  
Old 01-18-2016, 05:42 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XMVDCLIX
Images: 28
Default Re: Atmospheric optical phenomena

Circumzenithal arc (a.k.a. "upside-down rainbow") spotted over London last weekend.



Who, What, Why: How common are upside-down rainbows? - BBC News
__________________

Reply With Quote
Thanks, from:
Angakuk (01-19-2016), Janet (01-18-2016), JoeP (01-18-2016), SR71 (01-18-2016), The Lone Ranger (01-18-2016)
  #74  
Old 01-21-2016, 12:29 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XMVDCLIX
Images: 28
Default Re: Atmospheric optical phenomena



This is known as a Fallstreak Hole. The one in the photo was snapped over Korumburra in Australia. It occurs when a cloud has supercooled below freezing: initially the cloud is unable to freeze into ice crystals as the water is too pure and lacks the microscopic bits of salt or similar to act as seeds for the ice. When some crystals do eventually form near the centre of a cloud then a domino effect can occur leading to the sudden appearance of the hole.
__________________

Reply With Quote
Thanks, from:
Ari (01-21-2016), BrotherMan (01-21-2016), But (01-21-2016), Crumb (01-21-2016), Janet (01-22-2016), JoeP (01-21-2016), mickthinks (01-21-2016), Pan Narrans (01-21-2016), slimshady2357 (01-21-2016), Sock Puppet (01-21-2016)
  #75  
Old 01-21-2016, 07:59 PM
Ensign Steve's Avatar
Ensign Steve Ensign Steve is offline
He's back! for your fucking cheetos
 
Join Date: Jul 2004
Location: Silicon Valley
Gender: Bender
Posts: XXMXDCCLXIX
Images: 66
Default Re: Atmospheric optical phenomena

There was a rainbow outside my work a couple days ago. Just a regular rainbow, not double or anything, but it was huge and solid(-looking) and stretched from horizon to horizon. It was just kind of cool in the middle of the work day having people randomly get up and go to the window and go "ooh! rainbow!" and enjoy a bit of beauty.
__________________
:kiwf::smurf:
Reply With Quote
Thanks, from:
BrotherMan (01-22-2016), ceptimus (01-21-2016), Crumb (01-21-2016), Dingfod (01-22-2016), Janet (01-22-2016), JoeP (01-21-2016), SR71 (01-22-2016)
Reply

  Freethought Forum > The Marketplace > The Sciences


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 

All times are GMT +1. The time now is 08:25 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Page generated in 0.63825 seconds with 14 queries