Land Surface Temperature (Lapse Rates)

Author(s)	O.Conrad (c) 2008
Library ID	ta_morphometry
Tool ID	13
Version	1.0
Menu	Terrain Analysis \| Climate and Weather

Description

Temperature estimation at each grid point as a function of temperature, temperature lapse rate and elevation for a reference station. Further optional input is the Leaf Area Index (LAI) and the short-wave radiation ratio, which relates the irradiance including terrain effects to that calculated for a flat, horizontal plane. See Wilson & Gallant (2000) for more details.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	grid, input	`DEM`	-	-
	Short Wave Radiation Ratio	grid, input, optional	`SWR`	The ratio of daily total short-wave irradiance on sloping sites compared to horizontal sites.	-
	Leaf Area Index	grid, input, optional	`LAI`	-	-
Output	Land Surface Temperature	grid, output	`LST`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Maximum LAI	floating point number	`LAI_MAX`	-	Minimum: 0.010000 Default: 8.000000
	Elevation	floating point number	`Z_REFERENCE`	-	Default: 0.000000
	Temperature	floating point number	`T_REFERENCE`	Temperature at reference station in degree Celsius.	Default: 0.000000
	Temperature Lapse Rate	floating point number	`T_GRADIENT`	Vertical temperature gradient in degree Celsius per 100 meter.	Default: 0.650000
	C Factor	floating point number	`C_FACTOR`	-	Default: 1.000000

Command Line


Usage: saga_cmd ta_morphometry 13 [-DEM ] [-SWR ] [-LAI ] [-LAI_MAX ] [-LST ] [-Z_REFERENCE ] [-T_REFERENCE ] [-T_GRADIENT ] [-C_FACTOR ]
  -DEM:              Elevation
	grid, input
  -SWR:              Short Wave Radiation Ratio
	grid, input, optional
  -LAI:              Leaf Area Index
	grid, input, optional
  -LAI_MAX:       Maximum LAI
	floating point number
	Minimum: 0.010000
	Default: 8.000000
  -LST:              Land Surface Temperature
	grid, output
  -Z_REFERENCE:   Elevation
	floating point number
	Default: 0.000000
  -T_REFERENCE:   Temperature
	floating point number
	Default: 0.000000
  -T_GRADIENT:    Temperature Lapse Rate
	floating point number
	Default: 0.650000
  -C_FACTOR:      C Factor
	floating point number
	Default: 1.000000