| Name | Type | Identifier | Description | Constraints |
|---|
| Input |
|---|
| Mean Monthly Temperatures | grid list, input | TMEAN | Monthly (12) temperature observations. | |
| Output |
|---|
| Number of Days above Base Temperature | grid, output | NGDD | Number of days above base temperature. | |
| Growing Degree Days | grid, output | TSUM | Integral of daily temperature above base temperature. | |
| First Growing Degree Day | grid, output, optional | FIRST | First growing degree day of the year (1-365). | |
| Last Growing Degree Day | grid, output, optional | LAST | Last growing degree day of the year (1-365). | |
| Degree Sum Target Day | grid, output, optional | TARGET | Day of the year at which temperature sum is reached (1-365). | |
| Options |
|---|
| Base Temperature | floating point number | TBASE | Base temperature in degree Celsius | Default: 10.000000 |
| Degree Sum | floating point number | TTARGET | Target temperature sum in degree Celsius. | Default: 100.000000 |