Lapse Rate Based Temperature Downscaling (Bulk Processing)
- Author: O.Conrad (c) 2017
- Menu: Climate and Weather | Temperature
Description
The Lapse Rate Based Temperature Downscaling is quite simple, but might perform well for mountainous regions, where the altitudinal gradient is the main driver for local temperature variation. First, a given lapse rate is used to estimate sea level temperatures from elevation and temperature data at a coarse resolution. Second, the same lapse rate is used to estimate the terrain surface temperature using higher resoluted elevation data and the spline interpolated sea level temperatures from the previous step.
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Elevation | grid, input | LORES_DEM | - | - |
| Lapse Rate | grid, input | LORES_LAPSE | - | - | |
| Temperature | grid list, input | LORES_T | - | - | |
| Elevation | grid, input | HIRES_DEM | - | - | |
| Output | Temperature | grid list, output | HIRES_T | - | - |
| Options | Coarse Resolution | grid system | LORES_GRID_SYSTEM | - | - |
| High Resolution | grid system | HIRES_GRID_SYSTEM | - | - | |
| Lapse Rate | choice | LAPSE_METHOD | - | Available Choices: [0] constant lapse rate [1] constant lapse rate from regression [2] varying lapse rate from grid Default: 0 | |
| Constant or Minimum Lapse Rate | floating point number | CONST_LAPSE | constant or minimum limit lapse rate in degree of temperature per 100 meter. | Minimum: 0.000000 Default: 0.600000 | |
| Regression | choice | REGRS_LAPSE | - | Available Choices: [0] elevation [1] elevation and position [2] elevation and position (2nd order polynom) Default: 0 | |
| Limit Minimum Lapse Rate | boolean | LIMIT_LAPSE | If set, lapse rates from regression are limited to a minimum. | Default: 0 | |
| Minimum Lapse Rate | floating point number | MINIM_LAPSE | minimum lapse rate in degree of temperature per 100 meter. | Minimum: 0.000000 Default: 0.200000 |
Command Line
Usage: saga_cmd climate_tools temperature_downscaling [-LORES_DEM] [-LORES_LAPSE ] [-LORES_T ] [-HIRES_DEM ] [-HIRES_T ] [-LAPSE_METHOD ] [-CONST_LAPSE ] [-REGRS_LAPSE ] [-LIMIT_LAPSE ] [-MINIM_LAPSE ] -LORES_DEM: Elevation grid, input -LORES_LAPSE: Lapse Rate grid, input -LORES_T: Temperature grid list, input -HIRES_DEM: Elevation grid, input -HIRES_T: Temperature grid list, output -LAPSE_METHOD: Lapse Rate choice Available Choices: [0] constant lapse rate [1] constant lapse rate from regression [2] varying lapse rate from grid Default: 0 -CONST_LAPSE: Constant or Minimum Lapse Rate floating point number Minimum: 0.000000 Default: 0.600000 -REGRS_LAPSE: Regression choice Available Choices: [0] elevation [1] elevation and position [2] elevation and position (2nd order polynom) Default: 0 -LIMIT_LAPSE: Limit Minimum Lapse Rate boolean Default: 0 -MINIM_LAPSE: Minimum Lapse Rate floating point number Minimum: 0.000000 Default: 0.200000