Jet trails/exhaust.

jimh · 06-07-16, 06:25 PM

Obviously you get patches of varying humidity up in the sky - if the patch is humid enough, it's a cloud, but I would imagine there is varying patches of humidity in "clear" sky.
I guess then that a jet can be flying in relatively humid sky, then hit a dry patch and the jet trails become apparent?
I guess this might vary over the UK partly due to the location each year of the jet stream, which I think is unusually positioned at the moment.

Or, maybe that's the source of the chemical "the man" uses to keep us all stupid, preventing us from noticing that "the man" is in fact a lizard!

06-07-16, 06:25 PM	#4
jimh Grown up member Classic Audi Club Member Join Date: Dec 2008 Posts: 122	Obviously you get patches of varying humidity up in the sky - if the patch is humid enough, it's a cloud, but I would imagine there is varying patches of humidity in "clear" sky. I guess then that a jet can be flying in relatively humid sky, then hit a dry patch and the jet trails become apparent? I guess this might vary over the UK partly due to the location each year of the jet stream, which I think is unusually positioned at the moment. Or, maybe that's the source of the chemical "the man" uses to keep us all stupid, preventing us from noticing that "the man" is in fact a lizard!