+24°F (-4°C) last night,
dashed to the Park early.
Located a patch of hexagonal ice columns,
still nurtured by water vapor deposition.
“This particular crystal habit of ice is characterized by hexagonal cross section in a plane perpendicular to the long direction of the columns. Growth by vapor deposition at temperatures of from -3° to about -8°C leads to growth of columnar crystals, though other crystal features (needles, scrolls) also appear in this temperature interval, depending on the degree of water vapor super saturation.” American Meteorological Society.
©131128-001 Frost Ice Columns
Stone Mountain Park
Thursday 28 November 2013
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I never cease to learn new things from your postings, Doc. A very good thing.
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Posted by: Harold Reheis | 15 May 2014 at 01:25 PM