Originally posted by Maya432
reply to post by Essan
ok...so it lasts like 5 minutes...ok...I agree 100% on that.
now...what about the ones that don`t dissapear??
and if these are all contrails then why are so many researchers,
air traffic controllers and many others claiming chemtrails.???
contrailscience.com...
Contrail, streamer of cloud sometimes observed behind an airplane flying in clear, cold, humid air. It forms upon condensation of the water vapour produced by the combustion of fuel in the airplane engines. When the ambient relative humidity is high, the resulting ice-crystal plume may last for several hours. The trail may be distorted by the winds, and sometimes it spreads outwards to form a layer of cirrus cloud.
vapour trail.
(2007). In Encyclopædia Britannica.Retrieved May 4, 2007,from Encyclopædia Britannica Online: www.britannica.com...
Myth #3 - Long lasting contrails have appeared in “parallel lines”, “grid” and “X” formations, which are not normal, so must be “chemtrails.
False. Well, the last bit is false. Yes, contrails make all kinds of patterns in the sky, simply because there are a lot of planes flying overhead, and they fly in all directions. This is pretty much a function of where you live, and the prevailing winds. For example, if you live the Willamette Valley, Oregon, the overflying planes are nearly all North/South, so you’ll get parallel lines. If you live live in more central place, like North Texas, you’ll get planes flying overhead in every direction, so you will get “X” patterns (and “H” and “grids”). If there’s enough wind, and the trails last long enough, then the grid might spread out to cover the sky.
contrailscience.com...
Originally posted by greeneyedleo
reply to post by Maya432
Have you also looked to www.contrailscience.com... to see a different view?
contrailscience.com...
Contrail, streamer of cloud sometimes observed behind an airplane flying in clear, cold, humid air. It forms upon condensation of the water vapour produced by the combustion of fuel in the airplane engines. When the ambient relative humidity is high, the resulting ice-crystal plume may last for several hours. The trail may be distorted by the winds, and sometimes it spreads outwards to form a layer of cirrus cloud.
vapour trail.
(2007). In Encyclopædia Britannica.Retrieved May 4, 2007,from Encyclopædia Britannica Online: www.britannica.com...
Originally posted by OzWeatherman
this one looks like its going to be avoided. Perhaps some are finally coming around?
I would doubt it
Analysis of chemtrail spray have turned up powdered aluminum, barium, pathogens and even dried human blood cells.
NASA RESEARCHER Patrick Minnis studied satellite photos of the airplane jetstreams, which occur only when the sky is moist, close to forming thin clouds. What he discovered may sound far-fetched - but the evidence is clear.
For example, a distinctive oval-shaped contrail left behind by a test flight drifted across California for six hours, finally turning into a 60-mile-long cloud system. "We were very excited because it opened our eyes up to the fact that there's possibly a lot of clouds up in the sky that were originally contrails," Minnis said.
In another case, a figure-8 cloud created its own 60-mile swath of clouds over Texas and Louisiana over a nine-hour period.
NASA's Bruce Anderson actually went aloft to follow in the turbulent wake of a contrail. He came up with a theory for the role of contrails in causing atmospheric moisture to condense into clouds. "We do know that the sulfur in the fuel from aircraft generate aerosol particles, and those in turn can influence the formation of clouds," Anderson said. Could jet-caused clouds be enough to affect climate? "The number of clear days over the U.S. has decreased in the last 30 years, and we suspect that much of that is due to an increase in cirrus clouds, which we suspect is probably due to an increase in air traffic," Minnis said. And if such clouds trap heat, could they even contribute to global warming? That connection to the greenhouse effect is still murky. But there is evidence that contrail clouds can have a big impact on weather patterns. Last year, in the wake of Hurricane Nora, researchers got their most dramatic view yet: Moist air blanketed the nation's midsection from Nebraska to Texas, and scores of contrails fused into one enormous cloud - stretching for more than 800 miles."
