From AMS Glossary
Revision as of 19:54, 26 January 2012 by Perlwikibot
The freezing of the soil and terrestrial objects caused by a reduction of temperature when the adjacent air does not contain sufficient moisture for the formation of hoarfrost on exposed surfaces.
With respect to vegetation alone, this is termed a black frost. A dry freeze is usually considered to be a more local and short-period (probably radiative) phenomenon than a freeze.