Growing Degree Days
- Author: D.N. Karger (c) 2017
- Menu: Climate and Weather | Bioclimatology
Description
This tool calculates growing degree days from daily or from spline interpolated monthly observations for a given threshold. It also calculates the julian day at which a specific target temperature sum is reached.
Parameters
| | 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 | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
| 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 |
Command Line
Usage: saga_cmd climate_tools 18 [-TMEAN ] [-TBASE ] [-NGDD ] [-TSUM ] [-FIRST ] [-LAST ] [-TARGET ] [-TTARGET ]
-TMEAN: Mean Monthly Temperatures
grid list, input
-TBASE: Base Temperature
floating point number
Default: 10.000000
-NGDD: Number of Days above Base Temperature
grid, output
-TSUM: Growing Degree Days
grid, output
-FIRST: First Growing Degree Day
grid, output, optional
-LAST: Last Growing Degree Day
grid, output, optional
-TARGET: Degree Sum Target Day
grid, output, optional
-TTARGET: Degree Sum
floating point number
Default: 100.000000