[pbs] hydration
MMiller192 at aol.com
MMiller192 at aol.com
Thu Dec 30 13:31:40 EST 2004
In a message dated 12/30/2004 11:17:05 A.M. US Mountain Standard Tim,
johnbryan at worldnet.att.net writes:
While wind chill may have been for humans, I
am of the opinion that such does have an effect on plants. If not I can
not fathom the effect on plants of the same species, in the same areas,
where some were damaged others not. It was a logical explanation, but
perhaps just the fact that there was some protection, (out of the wind)
did make a difference.
I remember when I took plant physiology 25 years ago one of the things that
we learned to do was calculate the boundary layer of undisturbed air at the
surface of a leaf at different wind speeds. The layer is thinner at higher
wind speed. The boundary layer of undisturbed air slows the transport of water
vapor, other gases, and heat. I would think that wind chill is also related
to the thickness of the boundary layer.
Michael
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