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Term: Ground frost Class:  
 vernacular   (0%)
Created 6 June 2017
Last modified 6 June 2017
Contributed by GCW Glossary

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Definition: In British usage, a freezing condition injurious to vegetation, which is considered to have occurred when a minimum thermometer exposed to the sky at a point just above a grass surface records a temperature (grass temperature) of -0.9C (30.4F) or below. Since 1961 in Britain the statistics refer to the "number of days with grass minimum temperature below 0C" rather than to ground frost. A fuller discussion is given in McIntosh (1963).  AMSglossary 

Frost that penetrates the soil surface in response to freezing temperatures.  PhysicalGeography 

 GCW 
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