Ground frost

Alternative definitions (2), class: vernacular (0)
Term: Ground frost
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).
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary