SAGA-GIS Tool Library Documentation (v7.8.2)

Tool Land Surface Temperature

This tool estimates the land surface temperature by combining global solar radiation, albedo, and the Stefan-Boltzmann Law. This is an implementation of the approach proposed by Hofierka et al. (2020).


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputGlobal Irradiance (*)Grid, input, optionalIRRADIANCE[W/m2]-
Albedo (*)Grid, input, optionalALBEDOSurface reflectance [0 <= albedo <= 1]-
Emissivity (*)Grid, input, optionalEMISSIVITYThermal emissivity [0 <= emissivity <= 1]-
Convection Coefficient (*)Grid, input, optionalCONVECTIONConvection heat transfer coefficient [W/m2/K].-
Ambient Air Temperature (*)Grid, input, optionalT_AIR[Kelvin]-
Radiant Sky Temperature (*)Grid, input, optionalT_SKY[Kelvin]-
Initial Temperature Estimation (*)Grid, input, optionalT_INITIALInitial estimation of land surface temperature [Kelvin] (e.g., 300).-
OutputLand Surface TemperatureGrid, outputLST[Kelvin]-
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
DefaultFloating pointIRRADIANCE_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 5.000000
DefaultFloating pointALBEDO_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Maximum: 1.000000
Default: 0.500000
DefaultFloating pointEMISSIVITY_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Maximum: 1.000000
Default: 0.500000
DefaultFloating pointCONVECTION_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 10.000000
DefaultFloating pointT_AIR_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 300.000000
DefaultFloating pointT_SKY_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 280.000000
DefaultFloating pointT_INITIAL_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 300.000000
UnitChoiceUNIT-Available Choices:
[0] Kelvin
[1] Celsius
Default: 0
IterationsIntegerITERATIONS-Minimum: 1
Default: 10
(*) optional

Command-line

Usage: saga_cmd climate_tools 28 [-IRRADIANCE <str>] [-IRRADIANCE_DEFAULT <double>] [-ALBEDO <str>] [-ALBEDO_DEFAULT <double>] [-EMISSIVITY <str>] [-EMISSIVITY_DEFAULT <double>] [-CONVECTION <str>] [-CONVECTION_DEFAULT <double>] [-T_AIR <str>] [-T_AIR_DEFAULT <double>] [-T_SKY <str>] [-T_SKY_DEFAULT <double>] [-T_INITIAL <str>] [-T_INITIAL_DEFAULT <double>] [-LST <str>] [-UNIT <str>] [-ITERATIONS <num>]
  -IRRADIANCE:<str>           	Global Irradiance
	Grid, input, optional
  -IRRADIANCE_DEFAULT:<double>	Default
	Floating point
	Minimum: 0.000000
	Default: 5.000000
  -ALBEDO:<str>               	Albedo
	Grid, input, optional
  -ALBEDO_DEFAULT:<double>    	Default
	Floating point
	Minimum: 0.000000
	Maximum: 1.000000
	Default: 0.500000
  -EMISSIVITY:<str>           	Emissivity
	Grid, input, optional
  -EMISSIVITY_DEFAULT:<double>	Default
	Floating point
	Minimum: 0.000000
	Maximum: 1.000000
	Default: 0.500000
  -CONVECTION:<str>           	Convection Coefficient
	Grid, input, optional
  -CONVECTION_DEFAULT:<double>	Default
	Floating point
	Minimum: 0.000000
	Default: 10.000000
  -T_AIR:<str>                	Ambient Air Temperature
	Grid, input, optional
  -T_AIR_DEFAULT:<double>     	Default
	Floating point
	Minimum: 0.000000
	Default: 300.000000
  -T_SKY:<str>                	Radiant Sky Temperature
	Grid, input, optional
  -T_SKY_DEFAULT:<double>     	Default
	Floating point
	Minimum: 0.000000
	Default: 280.000000
  -T_INITIAL:<str>            	Initial Temperature Estimation
	Grid, input, optional
  -T_INITIAL_DEFAULT:<double> 	Default
	Floating point
	Minimum: 0.000000
	Default: 300.000000
  -LST:<str>                  	Land Surface Temperature
	Grid, output
  -UNIT:<str>                 	Unit
	Choice
	Available Choices:
	[0] Kelvin
	[1] Celsius
	Default: 0
  -ITERATIONS:<num>           	Iterations
	Integer
	Minimum: 1
	Default: 10