SAGA 9.4.2 | Tool Library Documentation

Tree Growth Season


Description

The 'Tree Growth Season' tool estimates the potential number of days suitable for tree growth as well as the average temperature for these days. The estimation needs monthly data of mean, minimum, and maximum temperature and precipitation. Internally a soil water balance model is run on a daily basis. Using the given thresholds a relative tree line height can optionally be estimated.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputMean Temperaturegrid list, inputTMonthly averages of daily mean temperature (12 grids, January to December) [_C]-
Minimum Temperaturegrid list, inputTMINMonthly averages of daily minimum temperature (12 grids, January to December) [_C]-
Maximum Temperaturegrid list, inputTMAXMonthly averages of daily maximum temperature (12 grids, January to December) [_C]-
Precipitationgrid list, inputPMonthly sums of precipitation (12 grids, January to December) [mm / m_]-
Soil Water Capacity of Profilegrid, input, optionalSWCTotal soil water capacity (mm H_O).-
OutputMean Temperaturegrid, outputSMTMean temperature of the growing season.-
Precipitation Sumgrid, output, optionalSMPPrecipitation sum of the growing season.-
Lengthgrid, outputLGSNumber of days of the growing season.-
First Growing Daygrid, output, optionalFIRSTFirst growing day of the year (1-365).-
Last Growing Daygrid, output, optionalLASTLast degree day of the year (1-365).-
Tree Line Heightgrid, output, optionalTLHEstimated relative tree line height.-
OptionsGrid Systemgrid systemPARAMETERS_GRID_SYSTEM--
Defaultfloating point numberSWC_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 220.000000
Top Soil Water Capacityfloating point numberSWC_SURFACE-Minimum: 0.000000 Default: 10.000000
Transpiration Resistancefloating point numberSW1_RESIST-Minimum: 0.010000 Default: 1.000000
Default Latitudefloating point numberLAT_DEF-Minimum: -90.000000 Maximum: 90.000000 Default: 0.000000
Threshold Temperaturefloating point numberDT_MINThreshold temperature (C) that constrains the growing season.Default: 0.900000
Minimum Soil Water Content (Percent)floating point numberSW_MIN-Minimum: 0.000000 Default: 2.000000
Minimum Lengthinteger numberLGS_MINMinimum length (days) of the growing season.Minimum: 1 Default: 94
Minimum Mean Temperaturefloating point numberSMT_MINMinimum mean temperature (Celsius) for all days of the growing season.Default: 6.400000
Maximum Tree Line Height Differencefloating point numberTLH_MAX_DIFF-Minimum: 0.000000 Default: 3000.000000

Command Line


Usage: saga_cmd climate_tools 11 [-T ] [-TMIN ] [-TMAX ] [-P ] [-SWC ] [-SWC_DEFAULT ] [-SWC_SURFACE ] [-SW1_RESIST ] [-LAT_DEF ] [-SMT ] [-SMP ] [-LGS ] [-FIRST ] [-LAST ] [-TLH ] [-DT_MIN ] [-SW_MIN ] [-LGS_MIN ] [-SMT_MIN ] [-TLH_MAX_DIFF ]
  -T:              	Mean Temperature
	grid list, input
  -TMIN:           	Minimum Temperature
	grid list, input
  -TMAX:           	Maximum Temperature
	grid list, input
  -P:              	Precipitation
	grid list, input
  -SWC:            	Soil Water Capacity of Profile
	grid, input, optional
  -SWC_DEFAULT: 	Default
	floating point number
	Minimum: 0.000000
	Default: 220.000000
  -SWC_SURFACE: 	Top Soil Water Capacity
	floating point number
	Minimum: 0.000000
	Default: 10.000000
  -SW1_RESIST:  	Transpiration Resistance
	floating point number
	Minimum: 0.010000
	Default: 1.000000
  -LAT_DEF:     	Default Latitude
	floating point number
	Minimum: -90.000000
	Maximum: 90.000000
	Default: 0.000000
  -SMT:            	Mean Temperature
	grid, output
  -SMP:            	Precipitation Sum
	grid, output, optional
  -LGS:            	Length
	grid, output
  -FIRST:          	First Growing Day
	grid, output, optional
  -LAST:           	Last Growing Day
	grid, output, optional
  -TLH:            	Tree Line Height
	grid, output, optional
  -DT_MIN:      	Threshold Temperature
	floating point number
	Default: 0.900000
  -SW_MIN:      	Minimum Soil Water Content (Percent)
	floating point number
	Minimum: 0.000000
	Default: 2.000000
  -LGS_MIN:        	Minimum Length
	integer number
	Minimum: 1
	Default: 94
  -SMT_MIN:     	Minimum Mean Temperature
	floating point number
	Default: 6.400000
  -TLH_MAX_DIFF:	Maximum Tree Line Height Difference
	floating point number
	Minimum: 0.000000
	Default: 3000.000000