"Dave Liquorice" wrote in message
ll.co.uk...
On Wed, 6 Mar 2013 04:54:32 -0800 (PST), Paul Crabtree wrote:

I have been contacted by a friend of mine living in Stainmore 1400ft up
in the Cumbrian Pennines. This morning he has found some ice chards in
his garden and would like to know where they may have come from.

Need more pictures really. We had freezing fog this morning, the rime
noticably built up on the trees from 0700 to 0800. It then got above
freezing
and melted.

Unless Staimore is on the approach to an airfield I don't think it would
have
been ice from an aircraft. Around here, apart from the RAF, all the planes
are cruising at around 30,000', any ice that forms doesn't fall off until
the
plane decends into warmer air.

--
Cheers Dave.
Nr Garrigill, Cumbria. 421m ASL.

The transatlantic aircraft pass over Cumbria, and I suspect start their
descent there. Certainly the pressure activated bomb on the Lockerbie
flight did not explode until it was north of you. That was on an ascent
rather than descent but I suspect the angle of climb would be similar.

Of course, if the ice was under trees then they would be a more likely
source but wouldn't the ice particles be leaf-shaped rather than
rectangular?

Cheers, Alastair.