This is very tired.

There is another thread which somehow still keeps going about these "chemtrails".

Those pictures are of what are called "contrails"...."condensation trails". They are a common and fully explained phenomenon which occurs in the upper atmosphere (above approximately 25,000 feet). When jet engine exhaust enters the upper atmosphere, it pushes out water vapor (a by product of the engine's fuel combustion). This water saturates the surrounding air, and condensation takes place in the form of a trail of minute ice particles (cirrus type clouds).

Contrails are not air pollution, and they are not "spraying" of any chemical in some clandestine attempt to poison children (or whatever other half-cocked theory based upon governmental distrust one may concoct). They have been around as long as we've had jets flying in the upper atmosphere...which is quite some time now.
Of course, it is fully permissible to believe what ever one wants. You should know that this ridiculous idea has its own thread already.

I am so sorry that you are allready blind mutant because of those chemtrails, but NATO admited they spray, and they sprayed before. People made a tests on chemtrails fibres and found barium and aluminium..but you allready know that...

I am so sorry that you are allready blind mutant because of those chemtrails, but NATO admited they spray, and they sprayed before. People made a tests on chemtrails fibres and found barium and aluminium..but you allready know that...

Actually, thinking about it you're probebly right. because whatever they're spraying is obviously affecting your ability to think streight.

I won`t repeate myself...I think I was clear about this subject. You are blind and that is not my problem. You have photos, videos, documents and NATO admition...I don`t know what do you want. You don`t know too.

Unfortunately all your evidence is based off videos on Youtube...not a good sign

Not all, and those videos are MINE. I have witness of fibres which were falling from the sky after spraying, we have lab evidence and admition...fot the third time. Shell I tell this 4th time..?

Everything I've found about persistent contrails is they show up more often in the 1 or 2 days before a front because it is then when the conditions are more conducive to persistent contrail formation. They have been known about since planes could fly high enough. Now yes, they are more common lately but I think that can be explained as well. These are some of the main reasons I think they have increased.
1. Jet traffic has doubled a few times since the 70's. It is projected to double again in just 10 years.

2. Jet engines today are more powerful than older models. This means they burn more fuel and consequently have much more water vapor in the exhaust.

3. Jets travel higher now (on average) partly due to increased traffic and partly due to increased power allowing higher flight. Higher flight means more contrails. Read that study from 1942 for more explanation on this.

4. An increase in traffic increases the exhaust put into the atmosphere. This exhaust has a cumulative effect and results in conditions more conducive to contrail formation over the long run. I've read some studies about it but have been unable to find them online.

5. Evidence that airlines have changed their engines can be found in the noise regulations that the FAA has put out. Around 2000, Stage 3 regs went into effect. This is a regulation governing the noise output of jet engines and required every airline to either replace their engines or install hush kits. These newer engines are not only quieter but are more fuel efficient meaning again, more water vapor.

Even still there is evidence that persistent contrails existed before the late 90's when those on the internet say they started.
This 1942 report mentions they can be persistent given the right conditions
http://naca.central.cranfield.ac.uk/report...ca-wr-l-474.pdf
and many bomber crews from WWII reported times when the contrails were persistent not only making them more visible to the AAA guns on the ground but also making it harder to see the other planes in the formation.

There is also phtographic evidence from the early 80's.
On this link they have quite a few pics taken by satellites and the shuttle in the early 80's showing persistent contrails mixed in with many other earlier and later pics.
http://www.astro.ku.dk/~holger/IDA/STSHH.html

As for why many think they started in the late 90's, I think that has to do with a few things. They started to become much more common then due in part to engine changes and increased traffic. The increase of use of the internet made it so more people started to notice them. Also recently digital cameras and scanners are much more common making it easy to show others pictures of these phenomena.

Another thing I noticed from my time at Tyndall AFB was that fighter pilots brief the contrail altitudes before each sortie. The altitudes for formation are easily predicted based on atmospheric conditions. They are of interst to fighter pilots because, like in WWII, they can give away one's position to the enemy. On days that I noticed the contrail altitudes were lower than other days I would also notice more persistent contrails from commercial flights in the area.

I have trouble believing that some secret government project is behind all chemtrails as I've not really seen any convincing evidence for it. I've used Flight Explorer and verifed myself that flights leaving persistent contrails are most often commercial flights and for all the talk I've seen about "chemtrails" being left by white unmarked jets, whenever I look at them with suitable binoculars or a telescope I see commercial markings.

Frankly, I've seen nothing that can't be explained with the known and established science behind contrails.

1. Jet traffic has doubled a few times since the 70's. It is projected to double again in just 10 years.

2. Jet engines today are more powerful than older models. This means they burn more fuel and consequently have much more water vapor in the exhaust.

5. Evidence that airlines have changed their engines can be found in the noise regulations that the FAA has put out. Around 2000, Stage 3 regs went into effect. This is a regulation governing the noise output of jet engines and required every airline to either replace their engines or install hush kits. These newer engines are not only quieter but are more fuel efficient meaning again, more water vapor.

Seriously...you just lost all credibility....look at whats in bold

Don't get me wrong...I agree that there is no such thing as chem-trails, they are ALL contrails...but seriously...how could you do this...

I saw one plane flying over my town relaseing a trail. It stoped relaseing 3 times, like go-stop-go-stop-go-stop and it went away without any trail.
You can see a plane and 3 trails on this video I took this month

http://www.youtube.com/watch?v=T4g7J0WlogA

Seriously...you just lost all credibility....look at whats in bold

Don't get me wrong...I agree that there is no such thing as chem-trails, they are ALL contrails...but seriously...how could you do this...

My photos dating back to a year, and chemtrails in Croatia showed up in year 2000. after signing "Partnership for peace" with NATO.

Seriously...you just lost all credibility....look at whats in bold

Don't get me wrong...I agree that there is no such thing as chem-trails, they are ALL contrails...but seriously...how could you do this...

why would aircraft be flying those particular patterns?I mean those are pretty deliberate looking lines being left like that.
even if they are simply contrails, as many of you suggest. Why are the planes flying to make actual grids?

contrails or chemtrails?
why would aircraft be flying those particular patterns?I mean those are pretty deliberate looking lines being left like that.
even if they are simply contrails, as many of you suggest. Why are the planes flying to make actual grids? May i ask how
much time elapsed while you were taking these shots? did they make the whole pattern while you watched? Or was it over
like a 4 hour time frame? i know i have seen similar things but those pictures certainly show some sort of patterns
maybe it was an air show? or something?
I have read about chemtrails and so many people take pot shots at what you are talking about. When they say stuff like
Why would they spray chemicals in the air ?I understand what you are saying about the chemicals.They arent really chemicals
they are Metals and Barium. from what I have read they have found these two things in many air samples. i then read about Barium
and found it is indeed harmful to Us . I dont think they are spraying these things in order to affect the population at all
so many folks attack the Chemical part of this Chemical isnt really a fair word barium is being used to attract all the availible moisture
in the surrounding air which in turn creates clouds the aluminum chaffe must be being used to either reflect light,or reflect or attract other charged particles
cool photos and videos something to think about

I hope that NATO will stop with spraying...Here some photos from Croatia, Split.

Interesting video.

The real question is.

IF its real.

How can you stop it ?

Use the old SAM sites from the war.

And from such high altitudes wouldnt it all just scatter ??

You dont see those planes which cover crops doing it from so high........

And to what Rodack said.........have you ever heard of plane routes ?

I agree with MID

Dosta vise saovim.....

There could be many reasons as to why they are spreading the small metal particles in the air - one theory is like you're saying about reflecting light; to reduce the sun's glare and theoretically reduce global warming.

I know that in my city, it's always hazy and only after a good rain storm is the sky clear.

These are definitely patterns made by design.
All commercial, or military jet traffic, flying from one place to another in the skies above 18,000 feet ASL (above sea level) flies along pre-arranged jet routes...always. There are many jets flying the world over every day, and there are hundreds upon hundreds of established jet routes. The patterns you see are the results of different jets going in different directions, many of which are crossing paths, often at different altitudes, and in different directions. In many many areas, these paths cross and may look like a tic-tac-toe grid, or a cone, or a parallel group of lines, etc.

The planes are not flying to make grids. They're not even flying to pull connies. The captians don't even care about that stuff. They're paying attention to their aircraft, and ATC's instructions as they fly along. They simply pull connies, depending on atmospheric conditions at altitude. That just happens to be the confluence of various jets at similar times, along different routes, at different altitudes--an exceedingly common occurrance in many locations all over the world, every day.

There is no mystery here, if you understand aviation, the nature of the all-too-common contrail, and jet routes.

Dosta vise saovim.....

Nitko te ne tjera da se zamaraš ovim.

I am so sorry that you are allready blind mutant because of those chemtrails

If you are talking about the pictures in the OP then you must realize that jet routes are often many miles wide. Add to that the fact that a plane will not always fly down the center of it. They may be told to offset a few miles for spacing. Then you will also have contrails that are left get blown by the wind (wind at those altitudes can be well over 100 knots) and a plane later flying in the exact same geographical location will leave a contrail that could be miles offset from the previous contrail. None of those pictureslook odd to me. They are all what I would expect from normal persistent contrails among intersections of normal jet routes.

Take a close look at those photos while planes COULD have flown those routes fora particular reason the manner and proximity
of the routes are simply too close to each other and too intertwined for any type of NORMAL air routes

I think there is a mystery her as to why are the contrails being deliberatly layed in patterns that change into light cirrus cover ?

I understand how your looking at it yet it dosent add up No your right planes do leave contrails .and the patterns or grid in the photo
is a contrail,But its not a normal contrail.

Im sorry but your again extremly simplified explanations just dont add up to what is being witnessed

Oh i see people are Imagining things now?Very well then i guess you have summed it all up then havent you?
so when i see planes flying back and forth creating a grid like in the op .its just my imagination they arent doing it while i watch
these are happeneing over time and far apart i imagined the rest of it?

Q
Chemtrails are often made side-by side, as if one or several planes have carefully flown a pattern to cover the entire sky. Why would commercial airliners do that?

A
Well, that will happen if they follow parallel courses for some reason, but mostly this phenomenon has a different reason: For safety reasons, air traffic is kept in corridors. The sky is actually full of one-way motorways. So the planes all follow identical courses, like beads on a continent-wide string. However, as mentioned in the article high winds prevail in those high altitudes, and the and the lane phenomenon is mostly due to cross-wind: The first plane makes a contrail, which drifts with the wind. Those winds are easily 100mph, so by the time the next plane comes along, the contrail from the first has drifted a considerable way to the side. As a long succession of planes fly the highway, each adds a new lane to the drifting pattern, till the sky is virtually striped. To verify this, watch a contrail while keeping reference to a ground-object (tree, mast, or tall building). You will see it drifting.

Q
Why is the sky sometimes covered by a checkerboard pattern?

A
Same reason as above, only you are watching one of the many places where corridors cross. They are not intersecting, because there is a difference in altitude, but that is not evident from the ground.

Q
Sometimes I see trails that go on and off so the resultant stripe is dashed. Surely planes do not turn their engines on and off like that?

A
No they don’t. But the boundary between the altitude where contrails form and where they don’t can be quite sharp, and not only can this boundary be at different height at different times, but there are very often a sort of waves in the air. If you have ever seen one of these time-compression movies of clouds, that wave motion can be very evident. When there is no clouds, we don’t see it, but it can still be there, and when a plane happens to fly right through these waves, you can see its contrail go on and off.

Q
Sometimes chemtrails look like they are dripping?

A
Contrails are a form of clouds, and they can take on strange shapes. In the wake of an airplane is a trail of quite violent turbulence. To generate lift, the wings have to push down on the air as they pass; this is a complex mechanism, but the bottom line is that to keep 70 tons of airliner airborne, you inevitably create a long wake of turbulence. Depending on conditions, this turbulent trail may twirl the contrail into quite exotic shapes.

Q
I once saw a picture of long stripes of quite thick and low-hanging clouds. Surely those are not contrails?

A
No, they are a natural phenomenon, although some of the mechanisms are the same. Especially on summer days, you will see these little cauliflower-shaped cumulus clouds. Often the sky is clear in the morning, then these little clouds begin to form, and by afternoon, it is semi-overcast. They are generated when the ground is heated by the sun. This makes the air rise over hot surfaces like cities, rocky surfaces, or open fields. When the warm, moist surface air reaches a certain altitude (depending on conditions this will happen between 500 yards and two miles up), it has expanded and cooled so much that the moisture condensates, and a cloud forms. If it is a calm day, it will more or less sit there and maybe grow big and strong, ending as a thundershower. If there is a fair to strong wind, however, the cloud drifts away from the area that started it. However, the condensation process releases heat, so once started, the cloud is self-sufficient: As it drifts along, it sucks up more moist air and can even grow this way. But the area that caused it to form will generate a new cloud, which will drift away, and after some time, we have long rows of clouds drifting across the sky. If the conditions are just right, they can form long, contiguous cloud stripes.

Q
I often see an extra high amount of chemtrails appearing just before a weather change, so I think they are doing something in order to influence the weather?

A
In fact it is the other way around: The change in weather influences the contrails. When the air becomes more moist at high altitudes, contrails are more likely to form and will persist longer. Ahead of an approaching front, especially a cold-front, the low-lying layers of air are pushed upwards. Rising air expands (because the pressure decreases) and expanding air gets colder, thus putting the moisture in it closer to the condensation limit, and more contrails form. The amount of planes is the same, but if they don’t form contrails, you are rarely going to notice a high-flying plane.

Q
Sometimes, the day starts out clear, then chemtrails are made, and into the afternoon, the sky gets totally hazed over.

A
As the sun heats the air, moist air rises. Sometimes it will form clouds, on other days it just generally pushes the whole column of air upwards, and come the afternoon a high-altitude haze forms. This is a normal weather-mechanism, and it is for this reason that sunsets are usually redder than sunrises. Except for the rare occasion of super-saturated air, contrails have nothing to do with it, except that they of course add to the hazy look of the sky.

Q
After days with lots of chemtrails, both I and others feel slick, coughing and having flu-like symptoms.

A
Well, contrails are most prominent on moist, hazy days. So is air-pollution. The hazy, possibly polluted air may make you cough and feel uncomfortable, but the culprit is the cars and chimneys right around you, not the planes passing miles over you. Watching the sky and imagining evil people spraying you isn’t going to make you feel any better.

Q
I have seen some photos where the trail starts right at the wings of the plane, even if the engines are rear-mounted. Surely those cannot be created by the exhaust?

A
No, those are created by the pressure-waves that exist around the wings. Those pressure-waves are basically what keeps the plane up, and in the right conditions, they can be seen, although they will mostly be difficult to see against the much more prominent contrail from the exhaust.

Q
I have seen photos of organic fibers and something that looked like blood-cells, collected on days with many chemtrails. Do you suggest that these reports are fake?

A
No, I have seen those micro-photos, and they seem genuine enough, but I find it extremely unlikely that they should come from high-flying planes. Just think about it: How fast do such near-microscopic particles fall? A few ft. per minute? Those planes fly at 30,000ft or even more. Microscopic particles and fine aerosols fall at maybe 2 ft. per minute or less, that means they would take about ten days to reach the ground from 30,000ft. And, of course, by that time they might have been carried a thousand miles from the release point. No, whatever is in those pictures is simply pollution, and if you want to find the source, you should not look up, but upwind.

No one has said this is imagination (have you read through the thread?) What they are saying is that these are not "chemtrails" but contrails that jet aircraft have always produced.