Re: conversion in CELCIUS
Denver130 said:
Can jet contrails form at 8C at 12,000ft?
If there's enough moisture in the air, yes. They'll be short-lived, but they'll be there.
Condensation trails will form
anywhere if there is enough moisture in the atmosphere and if the ambient air temperature is cold enough. They can even form below 1,000 feet under certain conditions (as you can see
here and
here).
By the way, when you look at the three pictures at http://www.geocities.com/houstonchemtrails/dec1102.html what do you see? Heavy low altitude cloud cover and a jet contrail or one of those notorious chemtrails? You decide.
I see a contrail. Only an ignorant paranoiac would see a "chemtrail."
By the way look at the bottom picture and notice how close to the roof of the apartment building it is. Wouldn't that look suspicious to you?
Oh yeah! That "chemtrail" is practically touching the roof, isn't it!
Guys and gals, you need to remember Denver130's definition of a contrail: a "pencil-thin" line of ice particles generated by aircraft flying over 38,000 feet that dissipates after thirty seconds. So any contrail he sees that isn't "pencil-thin"
must be down around 8 or 10 thousand feet. Denver, you're misjudging the height of the trails you're seeing by, I'm guessing, about 15,000 feet.
One more thing, about lapse rates. Denver, they're not set in stone. The atmosphere does not always cool at a uniform 2 deg. C per thousand feet. That's the
standard lapse rate.
The
standard sea level temperature is 59 deg. F (15 deg. C). Does that mean there's something radically wrong in Houston because it's usually a lot hotter than 59 degrees there? That's the kind of reasoning you're handing us!