Whatever it is the fact that it only appears on that strut is odd. harry
on 26/8/08 4:00 am, Horace Heffner at [EMAIL PROTECTED] wrote: > Why, in 84 days, is a large ice deposit only in that one spot? Why is > the frost not somewhat uniform? Keep in mind the photo is upside > down. The ground is at the top. The pictures make a lot more sense > when flipped 180 degrees. The strut in the foreground is also in the > dark, yet has no sign of frost at all in either photo. There are > many photos of many parts on Phoenix, but none have shown large and > changing white spots. > > BTW, we have many types of dry icing conditions here in south central > Alaska, especially when temperatures are below -30 deg. F. It is not > widely known that many areas in Alaska are classified as deserts, > based on annual precipitation. > > Best regards, > > Horace Heffner > http://www.mtaonline.net/~hheffner/ > > > > On Aug 25, 2008, at 2:57 PM, leaking pen wrote: > >> unless the differeing heat exchange of the metal causes ot to build >> frost from the vapor dissapearing from the ground. ive seen that >> effect with railings here in arizona in the dry dry winters. >> >> On Mon, Aug 25, 2008 at 3:35 PM, Horace Heffner >> <[EMAIL PROTECTED]> wrote: >>> >>> On Aug 25, 2008, at 12:26 PM, Harry Veeder wrote: >>> >>>> >>>> could that be frost? >>>> >>>> harry >>> >>> >>> Could be, but it seems to me unlikely, given there is no frost on >>> anything >>> else. A very light morning frost does occur on the ground there at >>> times. >>> If anything, the "before" picture looks like the ground is >>> lighter, so it >>> should have the frost. >>> > > > > > >
