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.
>>> 
> 
> 
> 
> 
> 
> 

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