reply to post by AndyMayhew
And incidently, long haul flights are more likely to produce contrails since they usually fly higher than short haul. In Britain a persistent contrail
is more likely to be produced by a flight from Paris to Montreal than one from Bristol to Birmingham
That's the story and that's the claim: that X's, grid patterns and just general toxic sky are produced by what is well known to be a rare and
unusual event. That event: a single craft, or up to half a dozen single craft, though not in proximity to each other, arrive, individually, at a
perfect altitude and a perfect humidity, without a front (pardon me while I talk about conditions outside the UK for a moment - I know you've almost
always got a front), and produce grid patterns. And that this rare and unusual event has morphed into an everyday thing in some areas.
The study of contrails took off in WWII because their visibility endangered airmen. In our current world, there is probably very little that is
unknown about contrails except, possibly, their interaction with the stratosphere.
Chemtrails, on the other hand, are a fairly recent and evolving science. To take you back a bit to a time before I, personally, had noticed grids in
the sky, here's an article from 1999:
Chemtrails Over America
The possibility that normal jet contrails are being laid down by US Air Force tanker aircraft has been shot down by a high-ranking American
military official. In a recent letter to a Washington State chemtrail sufferer, Major General Gregory Barlow of the Office the Adjutant General stated
that "Our KC-135 jet aircraft operate at altitude below 33,000 feet which is typically the altitude where jet contrails form."
Hundreds of photographs, a box of videotapes and my own observations of the spray planes operating over Vancouver Island off Canada's west coast
confirm that unmarked, all-white tanker-type aircraft are often laying thick billowing 'trails over American communities at altitudes often below
10,000 feet. At such low altitudes, it is impossible for normal contrails to form because there are no ice-crystals in the air to be nudged by wingtip
vortices and hot engines into condensation trails.
While occasionally known to linger in "cloud corridors" formed by constant jet traffic over heavily-flown air routes, according to the FAA,
normal contrails usually dissipate harmlessly within 45 seconds like the wake behind a boat.
So while the highly unusual event of a persistent contrail can happen and did happen in WWII because of weather, altitude and masses of craft flying
together, it is not everyday. Chemtrails, on the other hand, are everyday and there is considerable material devoted to their study and ongoing
I think the point is that Britain has a quite unique climate - very different to the USA, Canada, India, Brazil, China, Australia and continental
Europe. If you haven't spent years here, then you may not appreciate how quickly it can change, And how varied the prevalence of contrails is.
And it's a good point, however, the U.S. is a big place and doesn't have a climate. It has a number of climates from Alaska to the Chesapeake, to
Hawaii, to the Smokey Mts., to Zion, Yellowstone etc. - I could go on and on. Abrupt weather changes, believe it or not, exist outside of the UK.
Today, of course, there is climate change in that while we, here, are in heat and drought, other parts of the northern hemisphere world have yet to
see a summer. So let's not mix that into this because that'll just give us too many plates in the air to ever be able to state anything with