radiation frost
Quick Summary
Radiation frost occurs on clear, calm nights when excessive outgoing radiation lowers temperatures, even if the air isn't necessarily at the freezing point. This is distinct from wind, or advection, frost, which happens when cold air moves in, regardless of conditions. Frost itself is atmospheric moisture that crystallizes directly onto surfaces.12
Frost can damage plants by freezing the liquid within their cells. Horticulturalists employ methods to mitigate frost damage, such as reducing heat loss with coverings or adding heat through wind machines or heaters. Sprinkling water can also protect plants, as the process of freezing releases heat.23
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