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

Hofierka, J., Gallaya, M., Onacillovaa, K., Hofierka, J.jr. (2020): Physically-based land surface temperature modeling in urban areas using a 3-D city model and multispectral satellite data. Urban Climate, 31, 100566. doi:10.1016/j.uclim.2019.100566.

Author: O.Conrad (c) 2020
Menu: Climate and Weather|Temperature

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Global Irradiance (*)	grid, input, optional	`IRRADIANCE`	[W/m²]	-
	Albedo (*)	grid, input, optional	`ALBEDO`	Surface reflectance [0 <= albedo <= 1]	-
	Emissivity (*)	grid, input, optional	`EMISSIVITY`	Thermal emissivity [0 <= emissivity <= 1]	-
	Convection Coefficient (*)	grid, input, optional	`CONVECTION`	Convection heat transfer coefficient [W/m²/K].	-
	Ambient Air Temperature (*)	grid, input, optional	`T_AIR`	[Kelvin]	-
	Radiant Sky Temperature (*)	grid, input, optional	`T_SKY`	[Kelvin]	-
	Initial Temperature Estimation (*)	grid, input, optional	`T_INITIAL`	Initial estimation of land surface temperature [Kelvin] (e.g., 300).	-
Output	Land Surface Temperature	grid, output	`LST`	[Kelvin]	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Default	floating point number	`IRRADIANCE_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 5.000000
	Default	floating point number	`ALBEDO_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Maximum: 1.000000 Default: 0.500000
	Default	floating point number	`EMISSIVITY_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Maximum: 1.000000 Default: 0.500000
	Default	floating point number	`CONVECTION_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 10.000000
	Default	floating point number	`T_AIR_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 300.000000
	Default	floating point number	`T_SKY_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 280.000000
	Default	floating point number	`T_INITIAL_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 300.000000
	Unit	choice	`UNIT`	-	Available Choices: [0] Kelvin [1] Celsius Default: 0
	Iterations	integer number	`ITERATIONS`	-	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 number
	Minimum: 0.000000
	Default: 5.000000
  -ALBEDO:<str>               	Albedo
	grid, input, optional
  -ALBEDO_DEFAULT:<double>    	Default
	floating point number
	Minimum: 0.000000
	Maximum: 1.000000
	Default: 0.500000
  -EMISSIVITY:<str>           	Emissivity
	grid, input, optional
  -EMISSIVITY_DEFAULT:<double>	Default
	floating point number
	Minimum: 0.000000
	Maximum: 1.000000
	Default: 0.500000
  -CONVECTION:<str>           	Convection Coefficient
	grid, input, optional
  -CONVECTION_DEFAULT:<double>	Default
	floating point number
	Minimum: 0.000000
	Default: 10.000000
  -T_AIR:<str>                	Ambient Air Temperature
	grid, input, optional
  -T_AIR_DEFAULT:<double>     	Default
	floating point number
	Minimum: 0.000000
	Default: 300.000000
  -T_SKY:<str>                	Radiant Sky Temperature
	grid, input, optional
  -T_SKY_DEFAULT:<double>     	Default
	floating point number
	Minimum: 0.000000
	Default: 280.000000
  -T_INITIAL:<str>            	Initial Temperature Estimation
	grid, input, optional
  -T_INITIAL_DEFAULT:<double> 	Default
	floating point number
	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 number
	Minimum: 1
	Default: 10