Re: [asa] Data doesn't support global warming

From: gordon brown <Gordon.Brown@Colorado.EDU>
Date: Tue Dec 15 2009 - 23:01:27 EST

On Tue, 15 Dec 2009, Glenn Morton wrote:

>>>> It is not true that trees don't live in permafrost. Much of the boreal
>>>> forest
> is located on permafrost. The lower elevations of Alaska's interior are
> taiga,
> not tundra. However the trees' roots cannot go deep because they encounter
> permafrost. I recall once that a tour guide pointed out an area of forest
> which
> he called a "drunken forest" in which the trees did not stand up straight due
> to the permafrost underneath them. The existence of forest in these latitudes
> is apparently determined by whether the average summer temperatures are high
> enough.
> Gordon Brown (ASA member)<<<
> Not so fast Gordon. Tree roots in permanently (as in year round) frozen
> ground can't take up water. Permanentely frozen ground is the definition of
> permafrost--the perma short for permanent. Trees live ABOVE permafrost, not
> IN permafrost. Please acknowledge that I am correct on this.

You are technically correct. However many people refer to regions as being
permafrost regions if there is permafrost near the surface.

Gordon Brown (ASA member)

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Received on Tue Dec 15 23:02:02 2009

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