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originally posted by: network dude
Nice picture. I suppose you have the blessings of the small blue people to be able to make a thread here. Good for you.
originally posted by: 3danimator2014
originally posted by: network dude
Nice picture. I suppose you have the blessings of the small blue people to be able to make a thread here. Good for you.
Small blue people? Eh? Am i being slow? You talking about Smurf(y)?
originally posted by: Chadwickus
a reply to: smurfy
It would be handy to know still.
I've seen many videos and pics similar to the OP's before, many of which claim it shows the difference between a contrail and chemtrail.
originally posted by: smurfy
originally posted by: Chadwickus
a reply to: smurfy
It would be handy to know still.
I've seen many videos and pics similar to the OP's before, many of which claim it shows the difference between a contrail and chemtrail.
Yes that's true, although I think those pictorials are past best, or rather did they have any point ever, that would need to be very telling in some way. The funny thing about showing pictures of contrails from afar, is that it actually works both ways, those that would say that's just a contrail know no more than the guy that says it is a chemtrail!
originally posted by: Zaphod58
a reply to: ugmold
A fine layer of Cirrus that you can't see that the contrail is leaving a shadow on. It's well documented how it happens, and has been seen as early as something like 1959.
originally posted by: Zaphod58
a reply to: ugmold
It's rare to have the conditions be right for it. The Cirrus layer it's projected on doesn't form often, as it's not a cloud layer you can normally see. It's a haze, usually quite thin. I'm outside every day, and have seen every type of contrail you can name, and in the last three years have only seen 5 or 6 shadows.
contrailscience.com...
There are descriptions and pictures from 1955 at that link.
originally posted by: ugmold
a reply to: 3danimator2014
And what makes these I wonder, never saw this as a Kid, I'm 59.
originally posted by: smurfy
originally posted by: Chadwickus
a reply to: smurfy
It would be handy to know still.
I've seen many videos and pics similar to the OP's before, many of which claim it shows the difference between a contrail and chemtrail.
Yes that's true, although I think those pictorials are past best, or rather did they have any point ever, that would need to be very telling in some way. The funny thing about showing pictures of contrails from afar, is that it actually works both ways, those that would say that's just a contrail know no more than the guy that says it is a chemtrail!
originally posted by: 3danimator2014
originally posted by: ugmold
a reply to: 3danimator2014
And what makes these I wonder, never saw this as a Kid, I'm 59.
As Zaphod has said, a thin, invisible cirrus layer and the sun casting a contrail shadow. Its very easy to explain, but i wonder...what do YOU thihk it is? I mean, what could it possibly be other than a shadow. It certainly looks like a shadow. Im not being a d*ck, im genuinely curious as to what you think it is.
Im 40 and i dont remember a time when contrails didnt persist. Were there less of them, you bet. A fraction that there are today, but they were there.
For example, the cirrus clouds show in the picture are below the contrail. As the sun shines down on the cloud, the black line is actually the shadow of the contrail being cast on the cirrus cloud. Is this rare? Well, let’s just say it doesn't happen all the time – everything needs to fall into place (the contrail needs to be at the proper altitude and the sun needs to have the correct angle).
The fascinating photo above was taken above Quimper, Bretagne, France on June 25, 2004 and shows a jet contrail and its shadow exiting a 22 degree solar halo. At first glance, it appears that the contrail is underneath the cirrus veil, but its shadow demonstrates that in fact, the jet is above the cirrus displaying the halo. Halos can occur if hexagonal plate or column crystals in cirrus-type clouds are more or less randomly oriented. Sunlight enters one side of a crystal, is refracted, and then exits the opposite side, where it's again refracted by the same amount and in the same direction as the original refraction.
A number of parallel contrails do not only cast their shadows onto the screen of high cirrus clouds, but also onto a narrow bank of stratocumulus clouds (1 – 2). Due to the different altitude of the two cloud layers, the angle of vision is different for each of the layers. This is why the shadows do not appear parallel to the contrails. Also their shadows in the atmosphere appear under a different angle as these are cast downwards. So they “stand” in the air, and their angle corresponds to the sun elevation at the moment the photo was taken. The shadows on the low clouds, however, are flat or only a little tilted according to the shape of the clouds. Both shadows, the one in the atmosphere as well as the one on the clouds, are seen laterally, which makes a sharp bend appear. And not all contrails and shadows are parallel because the airplanes which caused the contrails did not all fly parallely.
And what makes these I wonder, never saw this as a Kid, I'm 59.
originally posted by: 3danimator2014
originally posted by: ugmold
a reply to: 3danimator2014
And what makes these I wonder, never saw this as a Kid, I'm 59.
As Zaphod has said, a thin, invisible cirrus layer and the sun casting a contrail shadow.