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Originally posted by nitro67
Notice this trail leading into the sundog:
Originally posted by nitro67
reply to post by defcon5
Ok sure. Why the increased air traffic?
I do not lie when I say the cloud cover is artificial/
PDF: Experimental Test of the Ininfluence of Propulsion Efficiency on Contrail Formation
For the first time, contrail formation was observed behind two
airliners with different engines under otherwise comparable conditions.
As documented by photographs, an altitude range exists
in which the aircraft with high engine efficiency causes contrails
while the aircraft with lower engine efficiency causes none. Hence,
the observations corroborate the validity of the theory according to
the revised Schmidt–Appleman criterion:Contrails of more efficient
engines form at smaller altitudes than those of less efficient engines.
Originally posted by defcon5
Your third, fourth, and fifth pictures are of a “sundog”; a natural occurrence when the upper atmosphere is cold enough to contain ice crystals. The fact that the upper atmosphere is that cold is why you will also see persistent contrails form in the same area.
Last year I posted a thread about the anomalous trails and ensuing atmospheric effects and got a lot of responses which I am thankful for, lots of different opinions and good feedback ( thread here I have been studying this topic for the last year, taking in opinions from all sides of the issue as well as learning some basics about cloud formation and meteorology in general.
Originally posted by nitro67
I want my blue skies! We do not get many around here!
but the conditions for it arising, being caused by air traffic exhaust is what is concerning to me.
And yet halos are a sign of high thin cirrus clouds drifting 20,000 feet or more above our heads.
These clouds contain millions of tiny ice crystals. The halos you see are caused by both refraction, or splitting of light, and also by reflection, or glints of light from these ice crystals. The crystals have to be oriented and positioned just so with respect to your eye, in order for the halo to appear.
Originally posted by tsurfer2000h
So you don't need any plane to cause that halo as it is a natural occurrence.
Aristotle (Meteorology III.2, 372a14) notes that "two mock suns rose with the sun and followed it all through the day until sunset." He says that "mock suns" are always to the side, never above or below, most commonly at sunrise or sunset, more rarely in the middle of the day.