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Location: UFOUpDatesList.Com > 2011 > Feb > Feb 10

Re: Study Closes Hole In 'Hole-Punch' Cloud Theory

From: Jim Deardorf <deardorj.nul>
Date: Thu, 10 Feb 2011 12:26:05 -0800 (PST)
Archived: Thu, 10 Feb 2011 17:12:19 -0500
Subject: Re: Study Closes Hole In 'Hole-Punch' Cloud Theory


>From: Joe McGonagle <joe.mcgonagle.nul>
>To: post.nul
>Date: Thu, 10 Feb 2011 14:26:26 +0000
>Subject: Study Closes Hole In 'Hole-Punch' Cloud Theory

>Study Closes Hole In 'Hole-Punch' Cloud Theory

>USA Today

>http://tinyurl.com/6lavrju

>1/31/2011
>Doyle Rice

>The truth is up there =97 and it isn't alien spaceships or covert
>government operations.

>"Hole punch" clouds, so named for gaps in clouds that appear to
>be made by a giant hole punch, have fascinated and worried people
>around the world for decades, leading to speculation about UFOs
>and other sinister plots.

>In October 2009, a hole-punch cloud caused a furor in Russia,
>sparking such headlines as "UFO cloud hovers over Moscow" in the
>China Daily newspaper.

>Now a study led by scientist Andrew Heymsfield of the Boulder,
>Colo.-based National Center for Atmospheric Research found that
>airplanes taking off or landing are the likely cause of these
>cloud holes. The airplanes can also cause additional rain or
>snow to fall after creating the holes.

>(Full article [by Rice] available at URL above.)

>[Originally post to the List in

 >Newslinks  - 30-01-11

 >http://www.ufoupdateslist.com/2011/jan/m31-006.shtml ]

I find it difficult to believe that Andy Heymsfield of NCAR
would claim that large hole-punch clouds like the one pictured
in the USA Today newspaper are to be explained by the mechanism
he discussed in his Bulletin article, which was not cited.
Heymsfield was apparently explaining how elongated holes in a
supercooled cloud or fog layer can be generated by one or more
aircraft flying up or down through it. This can produce a highly
elongated gap, which does not resemble an almost perfectly
circular hole which may be a half mile across within a thin
supercooled layer of altocumulus.

The writer of the article, Doyle Rice, seems to have extended
the shape of the channels Heymsfield described by using the
phrase "holes and channels", thereby bringing hole-punch clouds
into the picture. Thus Rice was trying to dispense with the
possible UFO explanation for hole-punch clouds.

I've had some email correspondence with some NCAR scientists who
are into cloud physics (Charlie Knight and Gabor Vali), and they
admitted (this was in 2006) that rare, large circular holes
"punched" in supercooled cloud layers are unexplained. There are
conflicting speculations as to just what processes are
responsible and at play, and no explanations why/how:

a) such a hole could grow to be so large yet never have been
additionally photographed when it was in earlier stages of
growth and was considerably or much smaller; and

b) an initially circular hole growing very large from one small
spot could remain circular despite small variations in
supercooled cloud droplet density and cloud layer thickness, and
despite large-scale wind shear and whatever gentle cloud
turbulence prevailed.


Jim



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