...may b****r up flights but should make for some interesting coloured sunsets if that is your thing.
The volcano ash in the atmosphere....
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Hi Voyager.
I just logged on to start a thread about this when I noticed yours! I was going to ask if anyone thought the cloud would provide any interesting photographic opportunities! (Not wishing to be unsympathetic to all the people trapped in airports.)
What effect do you think it will have on the sunset? And any ideas how far reaching any effects will be? (I'm in Leeds)
Ooooh, just heard on Sky News that it won't be visible because it's too high up!
I just logged on to start a thread about this when I noticed yours! I was going to ask if anyone thought the cloud would provide any interesting photographic opportunities! (Not wishing to be unsympathetic to all the people trapped in airports.)
What effect do you think it will have on the sunset? And any ideas how far reaching any effects will be? (I'm in Leeds)
Ooooh, just heard on Sky News that it won't be visible because it's too high up!
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This sort of thing can make for interesting colours in the atmosphere. But as to what it will be I don't think anyone will be able to predict! I'd suspect if you don't have cloud cover you'll see something in Leeds.
Thank you for marginalising my post that is talking about photography from Talk Photography.
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I'm pretty sure we're talking about photography!
I might have a look at sunset somewhere near Leeds tonight. Maybe there will be some kind of subtle difference? If not, maybe it will be an interesting one anyway!
Marc
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Wind yor neck in Voyager, your original post had nothing to do with photography.
Pointing out that the volcano ash in the atmosphere might make for some great sunset pictures is not about photography?
So do I....
Yet this was promptly moved and a post about web hosting has been left on the Talk Photography forum (for three weeks).
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That's no way for you to talk to fabs!How about you go back to bed and try and get out of it on the right side this time.
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Nice quiet day for me at work 
Heathrow closing at midday. Ash forcast in the south from about 1800 from the surface to 22,000ft.
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One post thanked you for marginalising the thread. A truly obnoxious way of making a point would be to tell people to 'wind their neck in' twice when in fact, they were correct.
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What happens when a plane flies through an ash cloud.
Pretty scary stuff I'd imagine.
Edit - changed link for better video.
Pretty scary stuff I'd imagine.
Edit - changed link for better video.
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I agree.
Anyway, let's hope someone, somewhere gets an interesting shot and adds it to the thread.
Nice one Dave. Very useful!
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I realised it is impossible to know the effect, but as a guide what sort of height are the northern lights gases at? might give us a clue to possible implications.
Interesting as ash will be present with gases, but surely the ash will just block light rather than enhance it. I remember from school that ash just caused a 'black out'. Questions questions!?!
Having said that check this out...
http://www.atoptics.co.uk/atoptics/sunvolc.htm
Interesting as ash will be present with gases, but surely the ash will just block light rather than enhance it. I remember from school that ash just caused a 'black out'. Questions questions!?!
Having said that check this out...
http://www.atoptics.co.uk/atoptics/sunvolc.htm
W
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No flights global warming activist smile, volcanic ash and gas creating greenhouse effect, global warming activist sulk, and then realize they can't blame mankind, and there wont be a volcano tax, unless Brown get back in of course, any excuse from him.
At this stage it's nothing like Krakatoa that created red sky's for years, and a 2 degree drop in global temps, but you never know
At this stage it's nothing like Krakatoa that created red sky's for years, and a 2 degree drop in global temps, but you never know
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Umm, the Northern lights are caused by charged particles hitting the ionosphere at about 50 miles up, nowt to do with gases?? The ash is very fine and it won't be some kind of apocalyptic black out as the volumes are not massive BUT enough to cause danger to aircraft engines as it's basically powdered pumice stone
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Voyager, I think you're quite right. This is about photography. I wonder who DID get out of bed on the wrong side this a.m.!
When I heard about this on the radio this morning, I thought "photo op" straight away, and all they could tallk about on the radio was "flights cancelled". Priorities?!
Actually now I think about it, Galen Rowell wrote about a volcano eruption somewhere in Asia, the ash from which caused "alpenglow" (and presumably sunset colours) to be subdued for a long while afterwards. I believe it was for months (or even years), not days.
And if this isn't about photography, Mr Mod., then my name's Mrs Photography.
When I heard about this on the radio this morning, I thought "photo op" straight away, and all they could tallk about on the radio was "flights cancelled". Priorities?!
Actually now I think about it, Galen Rowell wrote about a volcano eruption somewhere in Asia, the ash from which caused "alpenglow" (and presumably sunset colours) to be subdued for a long while afterwards. I believe it was for months (or even years), not days.
And if this isn't about photography, Mr Mod., then my name's Mrs Photography.
Marc
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Voyager, I think you're quite right. This is about photography. I wonder who DID get out of bed on the wrong side this a.m.!
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And if this isn't about photography, Mr Mod., then my name's Mrs Photography.
See post 17.
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Joker, that looks like an interesting site....thanks for posting it!
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In that little conversation, its difficult to tell who was talking to whom.....
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Apparently we won't actually see the cloud of ash.
Doesn't look like I'll see much of a sunset either no sun here in Lincs.
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Umm, the Northern lights are caused by charged particles hitting the ionosphere at about 50 miles up, nowt to do with gases?? The ash is very fine and it won't be some kind of apocalyptic black out as the volumes are not massive BUT enough to cause danger to aircraft engines as it's basically powdered pumice stone
Thanks for the info, this goes directly into the "things i've learnt today" folder
It just happened to be No1 on google for volcanic ash photos
, so about 4% effort on my part.It's not really 'the cloud' that you need to see to get interesting sunset colours - more that the fine particles of ash will reflect/refract the light in the upper atmosphere.
I suspect that the effect might well last for days anyway.
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Galen Rowell talked about the effects of the Mount Pinutabo eruption on sunset colours and alpenglow at great length, but its very complex and I couldn't summarise it properly here.
However...... sunset colours and alpenglow are two different things. After the eruption sunsets were very vivid for a short while before larger particles fell to earth. Then "a stratospheric blanket of sulphuric acid molecules began to bond to water molecules" and caused intense scattering of the light, allowing more indirect light to fall on the landscape.
(Presumably similar to haze ... the landscape photographers worst enemy...?)
"The effect is especially noticeable at times the sky would normally quite dark, as at dawn and dusk"
"Rich colours are washed out as if the house lights were left on during a slide show"
"Sunset and sunrise colours looking towards the sun should begin to appear reasonably normal on good days after 1993" (This was written in 1992)
Alpenglow could be affected for 5 years, he predicted.
However the Iceland eruption may not be as large as Mount Pinutabo...
written in haste.....
PS - pity this doesn't appear in the home page.......
However...... sunset colours and alpenglow are two different things. After the eruption sunsets were very vivid for a short while before larger particles fell to earth. Then "a stratospheric blanket of sulphuric acid molecules began to bond to water molecules" and caused intense scattering of the light, allowing more indirect light to fall on the landscape.
(Presumably similar to haze ... the landscape photographers worst enemy...?)
"The effect is especially noticeable at times the sky would normally quite dark, as at dawn and dusk"
"Rich colours are washed out as if the house lights were left on during a slide show"
"Sunset and sunrise colours looking towards the sun should begin to appear reasonably normal on good days after 1993" (This was written in 1992)
Alpenglow could be affected for 5 years, he predicted.
However the Iceland eruption may not be as large as Mount Pinutabo...
written in haste.....
PS - pity this doesn't appear in the home page.......
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No it's not (thank your chosen deity)...... Mt Pinutabo was one of the largest eruptions recorded in modern times and spewed 10 cubic Km of material into the atmosphere
and created a crater 2.5km in diameter... It also caused a drop in temperatures of around 0.5 degrees C in the Northern hemisphere and the cloud it created in the upper atmosphere persisted for 3 years.. I'm a bit of a geology nerd..
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This thread's getting really interesting! Cheers for all the posts guys.
