Contrail Observations

[Thunder]

I am on the fence about the whole contrail/chemtrail thing. But I did witness something interesting this afternoon and hopefully someone here can explain it.

I was sitting on the highway...in horrible traffic..when I decided to just watch the jets leave contrails. There was one very very high up...leaving a general contrail...the ones that dont disapate and are called "chemtrails". But then, as the plane left a large section of clouds, the contrails stoped. No more contrails. I then watched a second plane which was leaving a contrail parallel to the first one, very near by. Its contrails also stopped completaly at a certain point.

I was like "wow...did the plane stop leaving a trail? how can this be?.
Then I watched a third plane, once again parallel to the other 2, but this one did something interesting. Its contrails at first were thick and did not disapate. But as it left the large area of clouds, its contrail became thinner and thinner and began to disapate to the point that the plane stopped leaving a contrail. But it clearly was gradual and was not a sudden event. What could cause such a phenomenon?

This might be the answer to the whole contrail/chemtrail mystery.

 

[Terry]

Whether the exhaust of the airplane develops into a persistent cloud depends mostly on the stability of the atmosphere, which varies from day to day and place to place. Most likely there was a change in conditions between the trail and no-trail area.

 

[PhantomWolf]

Not just the stability but the temperature and pressures as well, I have seen days when contrials almost appear to be dotted lines across the sky.

As to being a fence sitter, that's how you get splinters. Honestly, the entire Chemtrail argument is even more wacky than the 9/11 crowd.

 

[Cl1mh4224rd]

My guess is... An area of higher temperature, above the threshold for contrail formation, possibly due to sunlight reflecting off of the clouds. Of course, temperature isn't the only factor.

As for the plane whose contrail tapered off rather than stopping abruptly? Don't know. Was it at the same altitude as the other two planes?

 

[technoextreme]

Not just the stability but the temperature and pressures as well, I have seen days when contrials almost appear to be dotted lines across the sky.

As to being a fence sitter, that's how you get splinters. Honestly, the entire Chemtrail argument is even more wacky than the 9/11 crowd.

Yeah. It's kind of ironic though. A bunch of chemtrail people said that when chemtrails are observed more people get sick. A NASA scientist said that the weather patterns that cause contrails also cause an increase in allergies.

 

[OldTigerCub]

Since the visible contrails are really nothing more than the condensation and freezing of the water vapor in the enhine exhaust into ice crystals, certain atmospheric variables such as temperature and humidity at the altitude the plane is flying at come into play. If an aircraft passes out of very cold air with a moderate humidity into warmer air or into an area with less humidity, the chances lessen that the vapor trail will be as visible.

ETA: One of NOAA's pages explains them here.

 

[Reheat]

Contrails conditions are very predictable by aviation oriented weather folks*. Another factor not mentioned is wind. Wind can dissipate contrails quite rapidly.

Here's some useful information.....

http://www.borderlands.com/contrails/contrail.htm

Chemtrails are as bogus as believing that pigs can fly....

*ETA: Aircraft that fly combat missions routinely get information regarding the altitudes that contrails are likely to occur so that they may avoid those areas.

 

[BenBurch]

Most people just do not look at the sky, nor do they note the clouds or contrails that might be in it.

So, when you call their attention to the "chemtrail meme" they change their behavior and start looking at the sky. Then they notice lots of contrails, and in their previous lives noticed very few, and so the current frequency of contrails is seen by them to be higher than the previous time when they were not looking for them.

 

[OldTigerCub]

Contrails conditions are very predictable by aviation oriented weather folks*. Another factor not mentioned is wind. Wind can dissipate contrails quite rapidly.

Here's some useful information.....

http://www.borderlands.com/contrails/contrail.htm

Chemtrails are as bogus as believing that pigs can fly....

*ETA: Aircraft that fly combat missions routinely get information regarding the altitudes that contrails are likely to occur so that they may avoid those areas.

second ETA: Good point about military aircraft. The US Army Aircorps lost a lot of bombers during WW2 due to the fact that their position was given away by contrails. Where the planes were flying high enough to be hard to spot, the contrails were like flying a huge penant on their tails, leading enemy fighters right to them.

However, if pigs could fly they would certainly leave chemtrails!

 

[Fnord]

1) The planes transited from high/low pressure region to low/high pressure region, with the third plane doing so at a different altitude.

2) The planes passed through a cold/warm front, with the third plane doing so at a different altitude.

3) The planes passed through regions of different humidity, with the third plane doing so at a different altitude.

4) Any combination of 1, 2, and 3.

5) The planes docked inside the cloud with their mother ship, which used an NWO Mk-VII holographic generator to project images of planes flying out of the cloud. It was only after the third projected image left the cloud that the operator noticed that he/she forget to include the chemtrail, and thus the hasty inclusion was out of sync with the third projected image.

6) It never happened, or it happened differently than the way you described.

 

[Mr. Skinny]

Most people just do not look at the sky, nor do they note the clouds or contrails that might be in it.

So, when you call their attention to the "chemtrail meme" they change their behavior and start looking at the sky. Then they notice lots of contrails, and in their previous lives noticed very few, and so the current frequency of contrails is seen by them to be higher than the previous time when they were not looking for them.

Hehe. I'm probably the poster child for "chemtrail" exposure. I've lived within 10 miles of Wright-Patterson AFB for over 50 years. Dayton is probably one of the most "chemtrail" exposed cities in the United States.

I probably suffered more health consequences from the B-52 exhaust of BUF's flying over my head in the 60's then I ever will from "chemtrails".

The whole frikkin' thing is laughable for me.

Then again......maybe the chemtrails got to me, OMG.

 

[Unsecured Coins]

I done covered chemtrails.

 

[leftysergeant]

My guess is that the planes that left a contrail that ended abruptly were cruising at a steady altitude and crossing into a warmer or drier environment. The plane that left a decreasing contrail was either climbing or descending into a warmer or drier area

 

[Cheap Shot]

9-11 Temperature Change Minus Contrails

The terrorist attacks of September 11, 2001 was the aforementioned event, and it was likely to have excited meteorological researchers involved in contrail impact studies. The national airspace was shut down for three days, something that had not yet occurred since the jet age began in the 1960s and is not likely to occur ever again. Scientists took advantage of this unique three day period in history that lacked contrails. What they learned was shocking and is enough evidence to effectively silence any counterargument to their case. One measure of climate is the average daily temperature range (DTR). For thirty years this had been recorded and extra cirrus clouds in the atmosphere would reduce this range by trapping heat. “September 11 – 14, 2001 had the biggest diurnal temperature range of any three-day period in the past 30 years,” said Andrew M. Carleton1. Not in three decades had there been such a large temperature spread between the daytime highs and the nighttime lows. Furthermore, the increase in DTR during those three days was more than double the national average for regions of the United States where contrail coverage was previously known to be most abundant, such as the Midwest, northeast, and northwest regions. The specific increase in the range was 2°F, which in three days was twice the amount the average temperature had increased by over thirty years time1. This is evidence that contrails do alter the climate of the land they drift above.

This is not in my realm of expertise, so was this true that DTR changed this much in three days, and if so it wasn't because a lack of ice crystals in the sky. When I worked on F-4's in the USAF, they smoked big time, couldn't have been to healthy.

 

[BenBurch]

It is entirely possible that is true. I heard a radio story a while ago about how they found that the lack of contrails had an effect, but I don't recall the details now.

I have in fact wondered if fleets of drone aircraft and their contrails couldn't slow down global warming. (Assuming of course that we knew how to predict the output for a given input.)

 

[Cheap Shot]

I had heard about it before, being an ATC type it had piqued my interest, but I had heard it was three degrees, so I decided to google it, and this study popped up. Just curious. You hear about auto emmissions, cow flatulation, but seems to me it that jet traffic would be a source of the problem.

 

[TriskettheKid]

Look up "global dimming."

That should explain the temperature shifts and why it has pretty big implications for global warming.

The basic thing is that global dimming is actually masking the effects of global warming.

 

[DRBUZZ0]

Yeah... them chemtrails... You can tell them because they look wispy or loopy or just... well you can tell em.

In any case, they've been doing this for decades, it turns out.

Second World War B-17's

Battle Of Brittan:

B-47 Circa Mid 1950's

Circa Early 1950's

 

[Reality Believer]

As far as the CT's are concerned, it is the evil NWO spraying us with something. What that could be is anyone's guess.

I usually tell them it is anti-stupid spray, analogous to weed killer. If you are aren't stupid, you have nothing to worry about.

 

[PhantomWolf]

I'm still amazed that they haven't figured out that if something persists then it is bering suspended in the air, up there, it's not falling down here.....