Again, the areas I am describing have less than 20% tree canopy cover, so the tree cover is not effectively blocking radiational heat loss.
Somehow I was reading your comment as 80% coverage.
I've been fooled by rime feathers if I haven't used a loupe. Like snowflakes, surface hoar comes in many forms dependent on supersaturation and presumably temperature. At least one of the forms is needle like, much like rime deposited on the snow surface by wind and a supersaturated airmass. I believe ISSW 2002 had a paper on rime feathers on the San Francisco Peaks near Flagstaff. They actually had rime debris flows.
Last edited by Gary Brill on Fri Dec 17, 2004 7:14 pm; edited 1 time in total
Joined: 07 Dec 2004 Posts: 2435 Location: Whistler, BC
Posted: Fri Dec 17, 2004 4:29 pm Post subject:
Sorry Gary, but I crossed two conversations there.
You are correct that our conversation about the slides in forested terrain occurred on what was a sh layer under 80% tree cover. You read that correctly. My comment on the 20% cover was referring to the first few posts on this topic, where I was discussing the prevalence of sh in tree wells in our subalpine region. This is where there is 20% or less tree cover.
Thanks for the tip on the surface rime feathers. I'll track that down.
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