SAGA 9.4.2 | Tool Library Documentation

Land Surface Temperature


Description

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 Irradiancegrid, input, optionalIRRADIANCE[W/m_]-
Albedogrid, input, optionalALBEDOSurface reflectance [0 <= albedo <= 1]-
Emissivitygrid, input, optionalEMISSIVITYThermal emissivity [0 <= emissivity <= 1]-
Convection Coefficientgrid, input, optionalCONVECTIONConvection heat transfer coefficient [W/m_/K].-
Ambient Air Temperaturegrid, input, optionalT_AIR[Kelvin]-
Radiant Sky Temperaturegrid, input, optionalT_SKY[Kelvin]-
Initial Temperature Estimationgrid, input, optionalT_INITIALInitial estimation of land surface temperature [Kelvin] (e.g., 300).-
OutputLand Surface Temperaturegrid, outputLST[Kelvin]-
OptionsGrid Systemgrid systemPARAMETERS_GRID_SYSTEM--
Defaultfloating point numberIRRADIANCE_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 5.000000
Defaultfloating point numberALBEDO_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Maximum: 1.000000 Default: 0.500000
Defaultfloating point numberEMISSIVITY_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Maximum: 1.000000 Default: 0.500000
Defaultfloating point numberCONVECTION_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 10.000000
Defaultfloating point numberT_AIR_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 300.000000
Defaultfloating point numberT_SKY_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 280.000000
Defaultfloating point numberT_INITIAL_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 300.000000
UnitchoiceUNIT-Available Choices: [0] Kelvin [1] Celsius Default: 0
Iterationsinteger numberITERATIONS-Minimum: 1 Default: 10

Command Line


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