At 11:09 AM 12/29/2008, Brian Lawson's fingers tapped: >On Dec 29, 2008, at 11:59 AM, Francis Drouillard wrote: > > At 09:47 AM 12/29/2008, Bruce Johnson's fingers tapped: > >> On Dec 28, 2008, at 10:16 PM, Brian Lawson wrote: > >>> Here's my latest photo. It has been a very productive couple of > >>> weeks for photography. > >>> > >>> <http://brianspics.wittybanter.org/LocalScene/pages/> > >>> ForbiddenValley.html> > >> > >> Wow, freaky. I suspect it takes pretty specific conditions for ice > >> to grow that way....just the right temp and humidity and no wind. > > > > I suspect conditions must be near the triple point for water, namely > > 0.16 degrees C and a total pressure near one atmosphere. > >We are at roughly 4,000 feet here so I'm not sure how we would get to >one atmosphere of pressure. >-- >Brian
Now you're really pressing the limits of my recall regarding the triple point. The vapor pressure needs to be about 1/100th atmosphere, but the total pressure can be much higher, up to one atmosphere. Or something like that. If I recall correctly, water is one of the only materials with a triple point that can be found under natural atmospheric conditions. In any event, that is one awesome image capture. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "StrataList-OT" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/StrataList-OT?hl=en -~----------~----~----~----~------~----~------~--~---
