Just a guess. I may have seen something like this in the past. Will keep my eyes open for it. Thanks for asking–
Jon
]]>Oh and I too put a small twig down into the vase.
Mine too was triangular.
How do I send you the video and photos?
]]>My point was that if one looks at the data, the picture is not as grim as the newspaper articles suggests. Also, note that the snow coverage instead has an increasing trend in the early winter. Also, obviously, the trends in smaller regions may be quite different than those of all of N. America, as I plotted here.
]]>I did not know about the term “cat ice” for the ice on these “crunchy” puddles. The 1901 book excerpt that is briefly shown in that video gives the definition, but does not mention why cat is in the term. Online, the Merriam-Webster dictionary also gives the term “shell ice", and one twitter poster (@RobGMacfarlane) writes that the ice is just thick enough to “support a cat” and hence the term.
About that Prof. Lewin video, if you look to it for an explanation, then you can better use your time elsewhere–you will find no explanation there of any freezing phenomena.
]]>Jon
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