i live in calgary, ab, canada. recently this week has had really been crappy because of rain and things, but recently today it became really nice and sunny. when i was outside in the sun i saw what looked like a fighter jet, making a really thick fog behind it. in a matter of hours it has went from sunny to hailing...
where these chemtrails, and if so who wants the conditions terrible?
Full Version: Chemtrails
Unexplained Mysteries Discussion Forums > News, Media & World Events > Conspiracies & Secret Societies
If in a certain area the weather is bad (rain, storm, low press.) for a week, it's the most natural thing to have a sunny and hot morning suddenly turning to more rain and hailing within hours.
I've heard of a method used in areas suffering from extended dry weather, in which a small plane (like those doing the crop dusting) ionizes the existing clouds in order to "help" them produce rain. It's natural, without chemicals or danger for humans or environment.
The so called "chemtrails" is no mystery, no conspiracy, no nothing. To put it simplistically, is what your car would leave in the sky if it could fly in high altitude..
I've heard of a method used in areas suffering from extended dry weather, in which a small plane (like those doing the crop dusting) ionizes the existing clouds in order to "help" them produce rain. It's natural, without chemicals or danger for humans or environment.
The so called "chemtrails" is no mystery, no conspiracy, no nothing. To put it simplistically, is what your car would leave in the sky if it could fly in high altitude..
What are those white lines that crisscross the sky, never disappearing as jet contrails are supposed to, instead thickening and spreading as the day goes by? A New Mexico scientist examines this phenomenon, six years of research and inquiry behind him. Learn about HAARP, respiratory illness and the heavy metals that are beginning to suffuse our air. (Clifford E. Carnicom)
The amount of time these contrails stay visable in the air is entirely dependent on the weather conditions at the altitude the planes were flying at, if it is a cold, but slightly humid day then they will hang around for ages, add to this a lack of wind to blow them about then they will disipate into the atmosphere very slowly. If they wanted to get some chemicals into the people, then surely they'd use the water supply because thats the most sure fire way of getting it to as many people as possible, not by spraying from 35-40,000 feet because by the time it reached the ground, it would have disipated so widely that the effect would be nulified.
QUOTE(coldwhitelight @ Jun 15 2006, 11:02 AM) [snapback]1232275[/snapback]
What are those white lines that crisscross the sky, never disappearing as jet contrails are supposed to, instead thickening and spreading as the day goes by?
The criss-cross pattern is a consequence of planes flying criss-cross patterns....When relative humidity is low, contrails dissipate within seconds.
But when relative humidity is high, especially at the subzero temperatures of the upper atmosphere, the addition of even a tiny amount of water vapor acts as a catalyst. Under these conditions, contrails persists and may linger and spread to cover the whole sky.
Im with Debunker on this one. There are plenty of things to be scared of in this world. Airplane contrails is not one of them. 
QUOTE(hazzard @ Jun 16 2006, 03:18 PM) [snapback]1233922[/snapback]
Im with Debunker on this one. There are plenty of things to be scared of in this world. Airplane contrails is not one of them.
I thought you were debunker! Anyway, at the present time, I'd have to agree with you.
Contrails can appear to do some very strange things but I seriously doubt they're part of a conspiracy.
QUOTE(DEBUNKER @ Jun 16 2006, 09:33 AM) [snapback]1233790[/snapback]
The criss-cross pattern is a consequence of planes flying criss-cross patterns....When relative humidity is low, contrails dissipate within seconds.
But when relative humidity is high, especially at the subzero temperatures of the upper atmosphere, the addition of even a tiny amount of water vapor acts as a catalyst. Under these conditions, contrails persists and may linger and spread to cover the whole sky.
I'll back these statements up too, completely.
The "crossing in the sky" is because different aircraft fly on different airways...which of course intersect (at least relative to a ground reference) all over the place.
QUOTE
Climate Change Out of the Blue
By Douglas Page| Also by this reporter
02:00 AM May, 10, 2004
Those wispy streams of vapor that follow jetliners across the sky may not be as innocuous as they appear.
A new NASA study claims man-made cirrus clouds formed by commercial jet engine exhaust may be responsible for the increased surface temperatures detected in the United States between 1975 and 1994.
Climate data shows there has been a 1 percent per decade increase in cirrus cloud cover over the United States, which the NASA paper says is likely due to commercial air traffic.
Cirrus clouds, whether natural or artificial, play an important climatological role because they trap heat in the atmosphere by reflecting infrared radiation emitted from the Earth's surface.
The study, which appeared in the April 15 issue of the Journal of Climate, estimates that cirrus clouds from jet engine condensation trails, or contrails, increased the temperature of the lower atmosphere by anywhere from 0.36 to 0.54 degrees Fahrenheit per decade. These findings tend to agree with National Weather Service data that shows temperatures at the surface and lower atmosphere rising by almost 0.5 degrees per decade between 1975 and 1994.
Using 25 years of global surface observations of cirrus clouds, temperature and humidity from the National Centers for Environmental Prediction, the researchers confirmed the cirrus trends with 13 years of satellite data from NASA's International Satellite Cloud Climatology Project.
"Both air traffic and cirrus coverage increased during the period of warming, despite no changes in the NCEP humidity at jet-cruise altitudes over the United States," said Patrick Minnis, senior research scientist at NASA's Langley Research Center in Hampton, Virginia.
By contrast, humidity at flight altitudes decreased over other land areas, such as Asia, and was accompanied by less cirrus coverage, except over Western Europe, where air traffic is very heavy, Minnis said.
The trends in cirrus cover and warming over the United States were greatest during winter and spring, when contrails are most frequent. These results led to the conclusion that contrails caused the increase in cirrus clouds.
Exhaust from aircraft engines is hot and moist, the water vapor in them coming mostly from combustion of hydrogen in the aircraft's fuel. The exhaust takes a moment to cool and mix with the surrounding air, so there is normally a 50- to 100-meter gap behind an aircraft before the contrail appears.
Once formed, contrails are distorted and spread by upper winds. Curtains of ice crystals can sometimes be seen falling from them.
Humidity in the air determines how long contrails remain in the atmosphere. Persistent trails sometimes form large patches of fibrous clouds indistinguishable from natural cirrus, cirrocumulus or cirrostratus clouds, according to Malcolm Walker, of England's Royal Meteorological Society.
Contrails that persist for an extended period of time are most likely to affect the climate. Minnis has estimated that a contrail that begins as a thin gossamer line across the sky can spread to cover more than 20,000 square kilometers in just a few hours.
Not everyone was immediately convinced by Minnis' contrail conclusions.
"The idea that the Earth is warming and high cloudiness is increasing and therefore part of the warming is due to increasing high cloudiness is not logically valid, if one is considering observations only," said Andy Detwiler, a professor of atmospheric sciences at South Dakota School of Mines and Technology.
Correlation does not equate to causation, he said.
"So many processes affect the temperature of the Earth that contrails could easily be acting to cool the Earth, and yet the overall temperature trend could be increasing," Detwiler said.
Still, this is not the first study to connect contrails to the issue of global warming. In 1999, the Intergovernmental Panel on Climate Change estimated that contrails from the world fleet of 12,000 civilian jetliners contribute as much to global warming as the carbon dioxide their engines emit burning jet fuel.
By Douglas Page| Also by this reporter
02:00 AM May, 10, 2004
Those wispy streams of vapor that follow jetliners across the sky may not be as innocuous as they appear.
A new NASA study claims man-made cirrus clouds formed by commercial jet engine exhaust may be responsible for the increased surface temperatures detected in the United States between 1975 and 1994.
Climate data shows there has been a 1 percent per decade increase in cirrus cloud cover over the United States, which the NASA paper says is likely due to commercial air traffic.
Cirrus clouds, whether natural or artificial, play an important climatological role because they trap heat in the atmosphere by reflecting infrared radiation emitted from the Earth's surface.
The study, which appeared in the April 15 issue of the Journal of Climate, estimates that cirrus clouds from jet engine condensation trails, or contrails, increased the temperature of the lower atmosphere by anywhere from 0.36 to 0.54 degrees Fahrenheit per decade. These findings tend to agree with National Weather Service data that shows temperatures at the surface and lower atmosphere rising by almost 0.5 degrees per decade between 1975 and 1994.
Using 25 years of global surface observations of cirrus clouds, temperature and humidity from the National Centers for Environmental Prediction, the researchers confirmed the cirrus trends with 13 years of satellite data from NASA's International Satellite Cloud Climatology Project.
"Both air traffic and cirrus coverage increased during the period of warming, despite no changes in the NCEP humidity at jet-cruise altitudes over the United States," said Patrick Minnis, senior research scientist at NASA's Langley Research Center in Hampton, Virginia.
By contrast, humidity at flight altitudes decreased over other land areas, such as Asia, and was accompanied by less cirrus coverage, except over Western Europe, where air traffic is very heavy, Minnis said.
The trends in cirrus cover and warming over the United States were greatest during winter and spring, when contrails are most frequent. These results led to the conclusion that contrails caused the increase in cirrus clouds.
Exhaust from aircraft engines is hot and moist, the water vapor in them coming mostly from combustion of hydrogen in the aircraft's fuel. The exhaust takes a moment to cool and mix with the surrounding air, so there is normally a 50- to 100-meter gap behind an aircraft before the contrail appears.
Once formed, contrails are distorted and spread by upper winds. Curtains of ice crystals can sometimes be seen falling from them.
Humidity in the air determines how long contrails remain in the atmosphere. Persistent trails sometimes form large patches of fibrous clouds indistinguishable from natural cirrus, cirrocumulus or cirrostratus clouds, according to Malcolm Walker, of England's Royal Meteorological Society.
Contrails that persist for an extended period of time are most likely to affect the climate. Minnis has estimated that a contrail that begins as a thin gossamer line across the sky can spread to cover more than 20,000 square kilometers in just a few hours.
Not everyone was immediately convinced by Minnis' contrail conclusions.
"The idea that the Earth is warming and high cloudiness is increasing and therefore part of the warming is due to increasing high cloudiness is not logically valid, if one is considering observations only," said Andy Detwiler, a professor of atmospheric sciences at South Dakota School of Mines and Technology.
Correlation does not equate to causation, he said.
"So many processes affect the temperature of the Earth that contrails could easily be acting to cool the Earth, and yet the overall temperature trend could be increasing," Detwiler said.
Still, this is not the first study to connect contrails to the issue of global warming. In 1999, the Intergovernmental Panel on Climate Change estimated that contrails from the world fleet of 12,000 civilian jetliners contribute as much to global warming as the carbon dioxide their engines emit burning jet fuel.
Source
Conspiracy theories find menace in contrails
I am in Prof. Detwiler's court on this one.
The "chemtrail" notion has the earmarks of yet another X-Files type of theorizing. Allegedly, chemicals are being sprayed upon us by airliners, and of course, there's a big secret plot involved, and people want the government to explain what's going on.
It of course becomes deeply connected with this crisis mentality that seems to be the modus-operandi of the popular media these days, and now we see, based on nothing conclusive whatsoever, that "chemtrails" are contributory to global warming...as if global warming has been substantiated to actually exist (it hasn't).
Nowadays, hurricanes are an effect of global warming! This is only because we see these things as catastrophies when they hit a city that shouldn't be where it is, and has been ill-prepared for 200 years for the eventuality of a hit, and has been lucky for a long time.
This is ridiculous. Everything having to do with the planets climate is cyclical. Hurricanes wax and wane periodically. Places get soaked by rain, and then are dry for extended periods, etc., etc...
It's humans who see these things as catastrophies, when all they really are is the planet taking care of itself naturally, as it always has. The problem is, humans have little understanding of the fact that mother Earth has absolutely no concern for its human population. It does what it does dispassionately, as it needs to.
Humans should spend more time trying to understand nature's behavior, and less time thinking its "bad", an attitude which causes unsubstantiated ideas of global warming to appear, and even imbecillic things like blaming a President of the United States for natural disasters because of his environmental policies. It now seems to be producing this wild idea that the insignificant cirrus formations of water vapor that spew from airliner engines from time to time are responsible for this global warming, and may also be the active mechanics of government to poison the population somehow...whoo.
The "chemtrail" notion has the earmarks of yet another X-Files type of theorizing. Allegedly, chemicals are being sprayed upon us by airliners, and of course, there's a big secret plot involved, and people want the government to explain what's going on.
It of course becomes deeply connected with this crisis mentality that seems to be the modus-operandi of the popular media these days, and now we see, based on nothing conclusive whatsoever, that "chemtrails" are contributory to global warming...as if global warming has been substantiated to actually exist (it hasn't).
Nowadays, hurricanes are an effect of global warming! This is only because we see these things as catastrophies when they hit a city that shouldn't be where it is, and has been ill-prepared for 200 years for the eventuality of a hit, and has been lucky for a long time.
This is ridiculous. Everything having to do with the planets climate is cyclical. Hurricanes wax and wane periodically. Places get soaked by rain, and then are dry for extended periods, etc., etc...
It's humans who see these things as catastrophies, when all they really are is the planet taking care of itself naturally, as it always has. The problem is, humans have little understanding of the fact that mother Earth has absolutely no concern for its human population. It does what it does dispassionately, as it needs to.
Humans should spend more time trying to understand nature's behavior, and less time thinking its "bad", an attitude which causes unsubstantiated ideas of global warming to appear, and even imbecillic things like blaming a President of the United States for natural disasters because of his environmental policies. It now seems to be producing this wild idea that the insignificant cirrus formations of water vapor that spew from airliner engines from time to time are responsible for this global warming, and may also be the active mechanics of government to poison the population somehow...whoo.
^What he said. 
QUOTE(rapid7 @ Jun 16 2006, 03:27 PM) [snapback]1233940[/snapback]
I thought you were debunker!
If you mean "a" debunker,well, I do like to se scientific proof before running around screaming -omg the evil government is gasing us!
QUOTE(rapid7 @ Jun 16 2006, 03:27 PM) [snapback]1233940[/snapback]
Anyway, at the present time, I'd have to agree with you.
Contrails can appear to do some very strange things but I seriously doubt they're part of a conspiracy.
Contrails can appear to do some very strange things but I seriously doubt they're part of a conspiracy.
Holy hell, I never thought Id se the day when we agreed on something.
QUOTE
Produced by award-winning videographer William Thomas and artist/videographer Paul Grignon, this fully documented video features the best ... available chemtrail photographs and video clips. This broadcast-quality video includes excerpts from FOX TV chemtrails coverage, as well as a behind-the-scenes look by Paul Grignon on how this video was made directly under the plumes of U.S. Air Force tankers blanketing Canada's west coast. Narrated by William Thomas, with original music, 3-D animations, extensive documentation, and plenty of digital quality firsthand footage - plus "I Witness" and what you can do about stolen skies.
QUOTE(coldwhitelight @ Jun 19 2006, 10:30 AM) [snapback]1237306[/snapback]
Chemtrails?
We're looking at contrails here.
This compelling docu-drama is fictional.
Note the portrayal of these "chemtrails" being shown coming off of the horiziontal stabilizer and rudders of jet liners.
Note that they then make the outlandish claim that when the KC135 fleet (which are modified 707s) was grounded, they were grounded for repairs or some such phrase, to their "TAIL FEATHERS".
I have never known an aircraft to have "tail feathers". And all contrails come from the engine nacelles of aircraft. Nothing has ever been observed venting out of the tips of the vertical or horiziontal stabilizers of any aircraft.
It also states, somewhat nebulously, that "chemtrails" were reduced by a huge percentage during this repair period, and that they resumed at their previous rate once the KC135 fleet resumed service.
There are only about 400 KC135s in service, a small minority of the fleet of large jet aircraft that are active today...and all jet aircraft produce contrails at altitude. They are visible virtually every single day. There is no substantiation that the grounding of this fleet of aerial tankers (they are used to fuel larger bombers and long distance military aircraft), which are a small minority of aircraft operations in the U.S., had any effect on contrails whatsoever (of course they didn't).
This is a cute, but silly piece of conspiracy theorist fed bilge. The idea that aluminum oxide is being sprayed to slow the effects of runaway global warning is ludicrous, because global warming is a theoretical construct that has never been shown to be an actual process.
This narrator talks about "spraying sessions" as if they are actually something other than natural contrails forming from the condensation of water vapor from jet engines! He points to a 757 being an unusual event because there are only two connies trailing behind the aircraft. 757s, and the majority of modern aircraft, have only 2 engines, and produce two trails. Duh.
4 engine jets produce 4 trails. 3 engine jets, 3, and two engine jets, 2....CONTRAILS, not chemtrails.
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