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 Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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