Skies

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robertj

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I've sailed on home waters since a boy raced abroad too, I've witnessed varying skies with their cirrus, stratus cumulous etc etc but not seen anything like what I've witnessed these last few summers.

Air liners go over the west country heading across the Atlantic leaving their vapour trails which disperse but ever ten or so a plane will leave a trail that doesn't disperse but spreads across the sky, slowly covering the whole sky.
Has anybody else noticed this? Is it new fuel they are using etc. is this the problem with our changing summers?
These spreading trails seem to envelope a beautiful bright sky and reduce the light coming through.
 
I observed something like that yesterday. In the picture below (meant to show fair weather cumulus) I noticed streaks of high-altitude cloud and wondered whether they were natural formations or the remains of con trails. Any opinions?

clouds_zps1cfedc11.jpg
 
I've watched them develope over several hours from aeroplane vapour to full sky coverage very thinly but still right across the skies. These trails seems to be spaced then join together to form this blanket.
This is not all trails but as I said previously every so often.
 
One degree rise in temperature after planes were grounded during 9/11 for a few days, i didn't read the rest of the article but it sounds definitive :-P
 
I wish I could find it but I can't (I'll keep looking) ..... there was an article somewhere about cloud holes (fallstreaks) and added on the bottom was another bit about contrails. This had a series of satellite photos of contrails over the north sea (RAF having some fun) but over the next X hours, they didn't disperse but drifted SW and slowly developed into almost total cloud cover.

not found it ye but did find this which is kinda cool http://www.wired.com/wiredscience/2010/05/gallery-clouds/
same set of images I was on about but on aunty http://news.bbc.co.uk/1/hi/sci/tech/8309629.stm
 
Last edited:
Robertj,

I think you're onto something !

Hard to believe it's a new fuel, I'd have thought in the quest for efficiency they'd be burning more cleanly, not leaving by-products.

There is another angle as soon as one mentions funny vapour trails; for a while now people have noticed something very high,very fast, which leaves a distinctive contrail of a line punctuated by regular puffs of cloud, known as 'doughnuts on a rope'.

The general theory is that this is the new American spy aircraft, good for Mach5 + and apparently powered by pulse scramjet.

Sometimes known as 'Aurora', the replacement for the SR-71.

I still don't see how that or any aircraft can cause the thin blanketting effect described, but something is doing it...
 
Also live in the west country and when the conditions have been conducive I have seen vapour trails disperse so slowly that they form a cloud layer.
Also when these conditions are present and the trails don't disipate it is easy to see why it can occur as there are so many trails.
When aircraft were grounded because of the volcanic ash cloud it was very noticible that we had clear blue skys.
 
There seems to be quite a few of these though, not an isolated plane.
Each takes up a different place in the sky, which causes the blanketing effect.







Seajet said:
Robertj,

I think you're onto something !

Hard to believe it's a new fuel, I'd have thought in the quest for efficiency they'd be burning more cleanly, not leaving by-products.

There is another angle as soon as one mentions funny vapour trails; for a while now people have noticed something very high,very fast, which leaves a distinctive contrail of a line punctuated by regular puffs of cloud, known as 'doughnuts on a rope'.

The general theory is that this is the new American spy aircraft, good for Mach5 + and apparently powered by pulse scramjet.

Sometimes known as 'Aurora', the replacement for the SR-71.

I still don't see how that or any aircraft can cause the thin blanketting effect described, but something is doing it...
Click to expand...
 
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