Rare. Polar Stratospheric Clouds over UK

Balance

Senior Member.
Social media UK is awash with amazing cloud photos due to an unusual event. Of course, a certain crowd are really going to town over "chemical skies".

http://donegalweatherchannel.com/20...-over-ireland-for-the-first-time-in-21-years/



They say they might be visible again tomorrow so I'll be checking sunset and sunrise.









Enjoy.

















Read more: http://metro.co.uk/2016/02/02/these-rainbow-clouds-are-beautifully-haunting-5657528/#ixzz3z1L8jgrK
 
Last edited:

Trailblazer

Moderator
Staff member
I was just about to post a thread about this. Unfortunately it was overcast here last night so I didn't get to see them, but the conditions may be suitable for a few days yet.
 

cloudspotter

Senior Member.
They were amazing this morning but unfortunately I only had my phone camera with me. I'm a little puzzled about the display yesterday morning though. At first I thought it was a particularly good display of iridescent clouds but then I saw all these reports of nacreous clouds but I still wasn't convinced.

1. I could see the clouds before they started to take on colour and they just looked like normal lenticular cirrocumulus
2. The colour in them only started to show as the sun started to rise
3. When I was finally in a position where I could get a half decent photo there was only a small patch left next to the sun and I had to position myself so the sun was blocked out to take the picture.

If anyone could help clear this up for me I'd be much obliged
 

cloudspotter

Senior Member.
Sorry, didn't (still don't) understand point three. :oops:

Sorry I didn't make myself clear. It seems that you would normally expect to see nacreous clouds when the sun is below the horizon, in the two hours before the sun comes up. Iridescent clouds are usually seen close to the sun and are best viewed when the sun is blocked as it was when I took my picture
 

Trailblazer

Moderator
Staff member
They were amazing this morning but unfortunately I only had my phone camera with me. I'm a little puzzled about the display yesterday morning though. At first I thought it was a particularly good display of iridescent clouds but then I saw all these reports of nacreous clouds but I still wasn't convinced.

1. I could see the clouds before they started to take on colour and they just looked like normal lenticular cirrocumulus
2. The colour in them only started to show as the sun started to rise
3. When I was finally in a position where I could get a half decent photo there was only a small patch left next to the sun and I had to position myself so the sun was blocked out to take the picture.

If anyone could help clear this up for me I'd be much obliged

AFAIK nacreous clouds only really show up when the sun is below the horizon. So maybe there were some normal iridescent clouds around too?
 

Mick West

Administrator
Staff member
When I saw the first report of these clouds on Facebook it was with the sun above the horizon, so I assumed it was just a normal iridescent cloud, so I "corrected" the person who said they were nacreous. Then the photos started flooding in, oops. :oops:
 

Balance

Senior Member.
I just realised I posted this in the wrong forum. Would it be best moved to Photos of Clouds or somesuch? If moved, please delete this post and thanks for your understanding.
 

Trailblazer

Moderator
Staff member
This was my thought. I've never seen nacreous before this morning so I had nothing to compare it to

I have seen them once, but 20 years ago. They appear much more luminous than iridescent clouds, as they are usually seen against a quite dark twilight sky. Compare the pictures on this thread (which are genuine nacreous clouds) with this, for instance, of iridescent clouds:




If you see them near the sun in the sky, I would say there are very unlikely to be nacreous.
 

cloudspotter

Senior Member.
I have seen them once, but 20 years ago. They appear much more luminous than iridescent clouds, as they are usually seen against a quite dark twilight sky. Compare the pictures on this thread (which are genuine nacreous clouds) with this, for instance, of iridescent clouds:




If you see them near the sun in the sky, I would say there are very unlikely to be nacreous.

Yeah I'm fairly convinced that it was iridescent I saw on Monday morning. Nacreous this morning though
 

Galan

New Member
I just realised I posted this in the wrong forum. Would it be best moved to Photos of Clouds or somesuch? If moved, please delete this post and thanks for your understanding.

It's ok. I asked Mick about it. Getting the feel for things here.
 

Mick West

Administrator
Staff member
I just realised I posted this in the wrong forum. Would it be best moved to Photos of Clouds or somesuch? If moved, please delete this post and thanks for your understanding.

I moved it into the image sub-forum, but it's really fine.
 

Trailblazer

Moderator
Staff member
Yeah I'm fairly convinced that it was iridescent I saw on Monday morning. Nacreous this morning though
I'm not so sure now. There are three different phenomena that have been observed recently:

Iridescent clouds (cirrus, around 30,000ft)

Nacreous clouds (PSCs) (about 50-80,000ft)

Noctilucent clouds (about 250,000ft)

I was thinking of noctilucent clouds when I said they can only be seen with these below the horizon. Nacreous ones can be seen during the daytime but are more vivid during twilight.
 

cloudspotter

Senior Member.
I'm not so sure now. There are three different phenomena that have been observed recently:

Iridescent clouds (cirrus, around 30,000ft)

Nacreous clouds (PSCs) (about 50-80,000ft)

Noctilucent clouds (about 250,000ft)

I was thinking of noctilucent clouds when I said they can only be seen with these below the horizon. Nacreous ones can be seen during the daytime but are more vivid during twilight.

This is the tail end of what I saw on Monday morning. Very close to the sun which I was trying to block out iri.JPG
 

tadaaa

Senior Member
The UK met office had an explanation these on their blog yesterday


pearl’ clouds enthrall skywatchers
2022016
Over the past few days, conditions in the upper parts of the atmosphere have allowed us to be treated to a rare glimpse of Nacreous Clouds.

What are they?
Found in the lower stratosphere, these clouds are mainly seen over polar regions in winter, where very cold air – minus 80˚C and lower – condenses the small amount of water vapour present into tenuous clouds. These clouds are normally found at altitudes of around 20 km.

http://blog.metoffice.gov.uk/2016/02/02/mother-of-pearl-clouds-enthrall-skywatchers/
 

Galan

New Member
Support for climate change? Cooling of the atmosphere and the shrinking of the boundary of the upper atmosphere? Very pretty in any case.
 
Thread starter Related Articles Forum Replies Date
Mick West Explained: RARE Video Footage of "Alien Space Craft" WATCHING ISS Astronaut! UFOs, Aliens, Monsters, and the Paranormal 1
Christophe Isbert The Mississippi Triangle Mystery (status: solved or probably solved) Skydentify - What is that Thing in the Sky? 2
Mick West How Rare (or Common) are Haloes, Sun Dogs, etc? A Review of the Literature Contrails and Chemtrails 10
Mick West Fact Check: 42 Degree Halos, Incredibly Rare Sundogs, and Toxic Barium Halos Contrails and Chemtrails 13
Mick West Debunked: Ice Boulders on Great Lakes Caused by Geoengineering [Natural but Rare Ball Ice] General Discussion 11
derwoodii Catalytic converters and the rise of rare metals and other elements traces in soils General Discussion 7
JFDee Polar Stratospheric (Nacreous) Cloud Skydentify - What is that Thing in the Sky? 2
Igrokush1 Plane with Yellow Tail over Redding, CA [Polar Air Cargo Flight] Skydentify - What is that Thing in the Sky? 119
J Interesting Contrail Shadow in the Polar Vortex Skydentify - What is that Thing in the Sky? 13
Marin B Stratospheric Balloon? Skydentify - What is that Thing in the Sky? 4
mrfintoil Debunked: CIA Director admits chemtrails, geoengineering, stratospheric aerosol injection Contrails and Chemtrails 24
M Difference between the impact of Stratospheric Sulfate Aerosols and Contrails? Contrails and Chemtrails 5
W Debunk NASA is proposing spraying stratospheric aerosols. Contrails and Chemtrails 9
Jay Reynolds Sudden Stratospheric Warming- No Reason to Blame Chemtrails Contrails and Chemtrails 1
Mick West Stratospheric passenger flights are likely an inefficient geoengineering strategy Contrails and Chemtrails 2

Related Articles

Top