Solar Halo

Pie · 05-18-2002, 12:27 PM

"But doesnt it have to be cold to have ice crystals? Miami isnt the first place I think of when I think chilly."

Yes, but the ice crystals form miles above ground level. The air up there is always cold... According to one web site I looked at, the temperature at 30,000 feet up is around -50 C. (That's about cruising altitude for big jets.)

For more information on temperature variation as a function of altitude, check out http://lidar.ssec.wisc.edu/papers/pp_thes/node22.htm

Fun and games with physics!

- Pie

05-18-2002, 12:27 PM	#4
Pie Gone and done Join Date: Sep 2001 Posts: 4,808	"But doesnt it have to be cold to have ice crystals? Miami isnt the first place I think of when I think chilly." Yes, but the ice crystals form miles above ground level. The air up there is always cold... According to one web site I looked at, the temperature at 30,000 feet up is around -50 C. (That's about cruising altitude for big jets.) For more information on temperature variation as a function of altitude, check out http://lidar.ssec.wisc.edu/papers/pp_thes/node22.htm Fun and games with physics! - Pie __________________ per·son \ˈpər-sən\ (noun) - an ephemeral collection of small, irrational decisions The fun thing about evolution (and science in general) is that it happens whether you believe in it or not.

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