UKTC Archive

Re: Tree condition and failure assessment study Freezing as a factor in susceptibility to wind breakage?

Subject: Re: Tree condition and failure assessment study Freezing as a factor in susceptibility to wind breakage?
From: Russ Carlson
Date: Jan 16 2022 09:10:20
[Text converted from HTML]
During college years in the Adirondacks of upper New York state, we
experienced 2 nights of -52°F, with a daytime high of -34° between. I
don't recall seeing branches or limbs falling, although there was one
tree which cracked open. It had internal decay. The woods were quite
vocal, especially the second afternoon when bright sun was shining on
more exposed trunks. The cracking and popping sounds were startling, and
a bit scary, but the branches were not falling. There was almost no wind
though, fortunately. And that cold spell caused no widespread death or
loss of trees later in the year.

If you study and understand the cellular physiology of wood, you'll know
why the branches don't shatter in cold temps (well, maybe at about -273°
or colder).

Russ Carlson, RCA, BCMA
ASCA Registered Consulting Arborist #354
ISA Board Certified Master Arborist PD-0008B
ISA Tree Risk Assessment Qualification

Tree Tech Consulting
114 Grand Canyon Court
Bear, DE 19701
302.832.1911 phone

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On 1/14/22 7:27 PM, Wayne Tyson wrote:

  Here is a quote from a US reporter advising "proactive" tree management,
  apparently as a preventive action. Would the Forum care to comment? Also,
  is anyone aware of the "2008 study" referenced in the report?
  "Eighteen percent of the falling tree deaths identified in a 2008 study
  happened while people were at home.
  "And although you may think of the more windy storms like hurricanes or
  tornadoes as the ones causing these deaths, trees and branches can fall
  during a mildly windy storm.
  "When the temperatures drop, trees and branches freeze and can be easily
  snapped in half with a small gust of wind."
  She had apparently consulted with an "arborist," but I have no way of
  knowing whether or not she interpreted him accurately.
  Thanks for any comments.

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