Certain atmospheric conditions cause jet contrails to result in ice formation, with the contrails remaining in the sky for a very long time. You can even see where a commercial jet's contrail will have a starting point where it passes into a portion of the sky with the conditions favorable for the ice formation.
Certain atmospheric conditions cause jet contrails to result in ice formation, with the contrails remaining in the sky for a very long time. You can even see where a commercial jet's contrail will have a starting point where it passes into a portion of the sky with the conditions favorable for the ice formation.