| Term: | Freezing degree-days |
| Definition: |
A measure of how cold it has been and how long it has been cold; the cumulative fdd is usually calculated as a sum of average daily degrees below freezing for a specified time period (10 days, month, season, etc.). NSIDCCryosphere
GCW |
| Term: | Freezing degree-days |
| Definition: | A measure of how cold it has been and how long it has been cold; the cumulative fdd is usually calculated as a sum of average daily degrees below freezing for a specified time period (10 days, month, season, etc.). |