Again this morning I was reminded of how much cloud cover jets produce from
their contrails looking to the north where west to east traffic flies surely
this is a major problem for us in the UK ?

Why don't we make everything not from UK airport activity fly up the east
coast ( westerly prevling winds or north or south of the UK.

If I remember after 9 11 the us skies were cloud free

M

"flybywire" wrote in message
...
Again this morning I was reminded of how much cloud cover jets produce
from
their contrails looking to the north where west to east traffic flies
surely
this is a major problem for us in the UK ?

Why don't we make everything not from UK airport activity fly up the east
coast ( westerly prevling winds or north or south of the UK.

If I remember after 9 11 the us skies were cloud free

But wasn't there a study done that showed that temperatures were
actually a degree or so *higher* at this time?
So bizzarely aircraft may be helping to *reduce* global warming.
--
Col

Bolton, Lancashire
160m asl

No no no, please don't mention contrails.
Anyone whose been on here a few years will know what I mean!!!!!

--
David Mitchell, 70m amsl, Langtoft, East Riding of Yorkshire.

David Mitchell wrote:
No no no, please don't mention contrails.
Anyone whose been on here a few years will know what I mean!!!!!

--
David Mitchell, 70m amsl, Langtoft, East Riding of Yorkshire.

No, I don't know what you mean and I've been coming here for 5
years. In any case the same could be said of snow, which often seems
"to take the reason prisoner". Contrails must have an effect on the
radiation budget, being at times so widespread. 4 oktas of
anthropogenic cirrus is not negligible, and worth discussing.

Tudor Hughes, Warlingham, Surrey.

"Tudor Hughes" wrote in message
ups.com...

David Mitchell wrote:
No no no, please don't mention contrails.
Anyone whose been on here a few years will know what I mean!!!!!

--
David Mitchell, 70m amsl, Langtoft, East Riding of Yorkshire.

No, I don't know what you mean and I've been coming here for 5
years. In any case the same could be said of snow, which often seems
"to take the reason prisoner". Contrails must have an effect on the
radiation budget, being at times so widespread. 4 oktas of
anthropogenic cirrus is not negligible, and worth discussing.

Tudor Hughes, Warlingham, Surrey.


It must have been longer ago that I realised.
There was an American chap, can't remember his name, who regularly posted
his theories on contrails, which was mainly about the conspiracies of the US
government. So long ago that I can't remember what it was all about.
Thr problem was that the posts were about 2 miles long and he kept getting
involved in petty and sometimes quite threatening debate. It was quite an
issue at the time.
The comment was tongue in cheek Tudor, I'm always open to "serious" debate.
ATB.

--
David Mitchell, 70m amsl, Langtoft, East Riding of Yorkshire.

Tudor Hughes wrote:
David Mitchell wrote:
No no no, please don't mention contrails.
Anyone whose been on here a few years will know what I mean!!!!!

--
David Mitchell, 70m amsl, Langtoft, East Riding of Yorkshire.

No, I don't know what you mean and I've been coming here for 5
years. In any case the same could be said of snow, which often seems
"to take the reason prisoner". Contrails must have an effect on the
radiation budget, being at times so widespread. 4 oktas of
anthropogenic cirrus is not negligible, and worth discussing.

Tudor Hughes, Warlingham, Surrey.

You'd think so wouldn't you! I tried a while back....

Les


--
Remove Frontal Lobes to reply direct.

http://uk.groups.yahoo.com/group/hxflyers/

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http://www.venganza.org/index.htm

Les Hemmings a.a #2251 SA

David Mitchell wrote:
"Tudor Hughes" wrote in message
ups.com...

David Mitchell wrote:
No no no, please don't mention contrails.
Anyone whose been on here a few years will know what I mean!!!!!

More than a few years back. I suspect that particular demented lunatic
is now doing "moon landing didn't happen" or "9/11 is a CIA
conspiracy". He was definitely in the foil hat, mind control rays,
alien abduction brigade. Google should find him easily enough.

David Mitchell, 70m amsl, Langtoft, East Riding of Yorkshire.

No, I don't know what you mean and I've been coming here for 5
years. In any case the same could be said of snow, which often seems
"to take the reason prisoner". Contrails must have an effect on the
radiation budget, being at times so widespread. 4 oktas of
anthropogenic cirrus is not negligible, and worth discussing.

The effect was measurable (with some uncertainty) post 9/11 when US
commercial air traffic was halted for 3 days. The day night temperature
range changed noticeably. eg

http://archives.cnn.com/2002/TECH/sc...rails.climate/

However, contrails are not by any stretch of the imagination a major
source of UK air pollution. Power plants, cars and busses do that at
ground level. Contrail cirrus is at worst a minor nuisance to amateur
astronomers like myself.

Regards,
Martin Brown