Glossary
The English version of our glossary is currently under construction and will be regularly updated.
Freezing degree days (FDDs)
A standard for the intensity of below-zero temperatures in a given timeframe, frequently used in the USA.
Describes a simplified relation between thermodynamics and growth processes. In this regard, the melting process is not included. To calculate the freezing degree days, the number of days with below-zero temperatures is multiplied by the negative degrees. Days with above-zero temperatures are not included.