Changes between Version 60 and Version 61 of doc/app/land_surface_parameters
- Timestamp:
- Jun 30, 2017 12:26:14 PM (8 years ago)
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doc/app/land_surface_parameters
v60 v61 2 2 [[TracNav(doc/app/partoc|nocollapse)]] 3 3 4 Since r1551 a full land surface model (LSM) is available in PALM. It consists of a fourlayer soil model, predicting soil temperature and moisture content, and a solver for the energy balance at the surface. Moreover, a liquid water reservoir accounts for the presence of liquid water on plants due to dew/fog. The implementation is based on the ECMWF-IFS land surface parametrization (TESSEL) and its adaption in the DALES model. More more details, see [wiki:doc/tec/lsm land surface model documentation].4 Since r1551 a full land surface model (LSM) is available in PALM. It consists of a multi layer soil model, predicting soil temperature and moisture content, and a solver for the energy balance at the surface. Moreover, a liquid water reservoir accounts for the presence of liquid water on plants due to dew/fog. The implementation is based on the ECMWF-IFS land surface parametrization (TESSEL) and its adaption in the DALES model. More more details, see [wiki:doc/tec/lsm land surface model documentation]. 5 5 6 6 All parts of the LSM code are modularized in module [/browser/palm/trunk/SOURCE/land_surface_model.f90 land_surface_model_mod]. In this context, a new Fortran NAMELIST {{{lsm_par}}} was added, containing all LSM-related steering parameters. The LSM is automatically activated when a {{{lsm_par}}} is set in the parameter file ({{{_p3d}}}). The user can easily set all relevant LSM parameters by choosing between 3 different surface types (vegetation, pavement, water) and various pre-defined surface classes 17 pre-defined [#vegetation_type vegetation types], 7 pre-defined [#pavement_type pavement type]s, 4 pre-defined [#water_type water types], and 6 different [#soil_type soil types]. The default setting of the LSM is a soil of medium porosity covered to 85% with short grass. It is also possible to modify the pre-defined vegetation/soil types by overwriting some of the parameters. Moreover it is possible to create user-defined vegetation and soil types from scratch. … … 350 350 }}} 351 351 {{{#!td style="vertical-align:top" 352 R( 4)353 }}} 354 {{{#!td style="vertical-align:top" 355 depending on [#vegetation_type vegetation_type] 356 }}} 357 {{{#!td 358 Root distribution 352 R(20) 353 }}} 354 {{{#!td style="vertical-align:top" 355 depending on [#vegetation_type vegetation_type] 356 }}} 357 {{{#!td 358 Root distribution. A value must be assigned to each soil layer (1-N) (see [#zs zs]). 359 359 {{{ 360 360 #!Latex 361 361 \[ R_k \] 362 362 }}} 363 over the foursoil layers (with index {{{k}}}).363 over the N soil layers (with index {{{k}}}). 364 364 365 365 It must hold that 366 366 {{{ 367 367 #!Latex 368 $ \sum_{k=1}^ 4R_k = 1. $369 }}} 370 368 $ \sum_{k=1}^N R_k = 1. $ 369 }}} 370 where N is the number of soil layers used. 371 371 }}} 372 372 |---------------- … … 388 388 }}} 389 389 {{{#!td style="vertical-align:top" 390 R( 4)391 }}} 392 {{{#!td style="vertical-align:top" 393 4*0.0394 }}} 395 {{{#!td 396 Soil moisture distribution over the four soil layers (given by [#zs zs]). Soil moisture is defined at the center of the soil volumes (see [#zs LSM grid]) and is only predicted when [wiki:doc/app/inipar#humidity humidity]{{{ = .T.}}}.397 398 '''Default (dry ):'''390 R(20) 391 }}} 392 {{{#!td style="vertical-align:top" 393 20*0.0 394 }}} 395 {{{#!td 396 Soil moisture distribution over the N soil layers (given by [#zs zs]). Soil moisture is defined at the center of the soil layers (see [#zs zs]) and is only predicted when [wiki:doc/app/inipar#humidity humidity]{{{ = .T.}}}. 397 398 '''Default (dry, eight layer configuration):''' 399 399 {{{ 400 soil_moisture = 0.0, 0.0, 0.0, 0.0 401 }}} 402 Note that the soil moisture is internally set to a minimum value according to [#wilting_point wilting_point] at model start. 403 400 soil_moisture = 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 401 }}} 404 402 }}} 405 403 |---------------- … … 408 406 }}} 409 407 {{{#!td style="vertical-align:top" 410 R( 5)408 R(21) 411 409 }}} 412 410 {{{#!td style="vertical-align:top" … … 414 412 }}} 415 413 {{{#!td 416 Soil temperature distribution over the four soil layers in K.417 418 '''Default :'''414 Soil temperature distribution over the N soil layers (in K). 415 416 '''Default (eight layer configuration):''' 419 417 {{{ 420 soil_temperature = 290.0, 287.0, 285.0, 283.0, 283.0421 }}} 422 The first four values represent the temperature of the soil layers (defined at the center of the layers of depth [#zs zs], see [#zs LSM grid]. The last (fifth) value represents the deep soil temperature, which is fixed (boundary condition).418 soil_temperature = 300.0, 300.0, 300.0, 300.0, 300.0, 300.0, 300.0, 300.0, 300.0, 419 }}} 420 The first six values here represent the temperature of the soil layers (defined at the center of the layers of depth [#zs zs]. The last (here: ninth) value represents the deep soil temperature, which is fixed (boundary condition). 423 421 424 422 }}} … … 587 585 }}} 588 586 {{{#!td style="vertical-align:top" 589 R( 4)587 R(20) 590 588 }}} 591 589 {{{#!td style="vertical-align:top" … … 593 591 }}} 594 592 {{{#!td 595 Depths of the four soil layers (in m). Note that the model operates with negative values below the surface, data output will thus be at located at {{{-zs}}}.596 597 '''Default :'''593 Depths (of the center) of the soil layers (in m). Note that the model operates with negative values below the surface, data output will thus be at located at {{{-zs}}}. Up to 20 individual soil layers can be chosen. 594 595 '''Default (eight layer configuration):''' 598 596 {{{ 599 597 zs = 0.005, 0.02, 0.04, 0.07, 0.15, 0.28, 1.00, 2.89,
