Changes between Version 43 and Version 44 of doc/app/land_surface_parameters
- Timestamp:
- Apr 6, 2016 3:31:26 PM (9 years ago)
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doc/app/land_surface_parameters
v43 v44 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 four layer soil model, predicting soil temperature and moisture content, and a solver for the energy balance at the surface. Moreover, a liquid water reservoi daccounts 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 four 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 19 pre-defined [#veg_type vegetation types] and 7 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. 7 7 8 A minimum configuration of the LSM requires setting of the parameters [#soil_type soil_type], and [#veg_type veg_type]. Setting of initial vertical profiles of [#soil_temperature soil_temperature] and [#soil_moisture soil_moisture] are recommened.8 A minimum configuration of the LSM requires setting of the parameters [#soil_type soil_type], and [#veg_type veg_type]. Setting of initial vertical profiles of [#soil_temperature soil_temperature] and [#soil_moisture soil_moisture] is recommended. 9 9 10 10 Note that the use of the LSM requires using a [wiki:doc/tec/radiation radiation model]. … … 67 67 Flag parameter for the bottom boundary condition of the soil model. 68 68 69 The use ecan choose between the following two options:69 The user can choose between the following two options: 70 70 71 71 '' '.T.' '' … … 207 207 }}} 208 208 {{{#!td 209 Depth of the paved surface. This parameter is only considered , when{{{veg_type = 20}}}.209 Depth of the paved surface. This parameter is only considered if {{{veg_type = 20}}}. 210 210 }}} 211 211 |---------------- … … 220 220 }}} 221 221 {{{#!td 222 Heat capacity of the pavement. The default value is a typical value for asphalt of roads. This parameter is only considered , when{{{veg_type = 20}}}.222 Heat capacity of the pavement. The default value is a typical value for asphalt of roads. This parameter is only considered if {{{veg_type = 20}}}. 223 223 }}} 224 224 |---------------- … … 427 427 Vegetation type to be used in the land surface model. 428 428 429 The user can choose from 19 different pre-defined vegetation classes accor ing to the ECMWF-IFS classification:429 The user can choose from 19 different pre-defined vegetation classes according to the ECMWF-IFS classification: 430 430 ||= '''veg_type'''=||='''Description''' =|| 431 431 || 0||user defined || … … 477 477 || 20|| -|| -|| 0.00|| -|| 1.0E.4|| 1.0E-5|| *3|| *3|| 0.00|| 478 478 (* not yet implemented)\\ 479 (*2 for water surfaces, the roughness lengths are dynamically calculated using a Charnock parameterization. Please note that {{{[wiki:doc/app/inipar#most_method most_method] = 'lookup' is not allowed in this case)\\479 (*2 for water surfaces, the roughness lengths are dynamically calculated using a Charnock parameterization.)\\ 480 480 (*3 for paved surfaces, the heat capacity is calculated from {{{pave_heat_capacity}}} and the depth of the uppermost soil layer)\\ 481 481 }}} … … 498 498 }}} 499 499 '''Schematic overview of the soil model grid:''' 500 [[Image(lsm_simple.png )]]500 [[Image(lsm_simple.png,200px)]] 501 501 502 502 }}} … … 525 525 }}} 526 526 {{{#!td 527 Roughness length for heat (in m). The setting of {{{z0h_eb}}} overwrites [wiki:doc/app/inipar#z0h_factor z0h_factor]. In this case, the roughness length for heat is calculated from [wiki:doc/app/inipar#z0h_factor z0h_factor] and {{{z0h_eb}}} (or [wiki:doc/app/inipar#roughness_length roughness_length]).527 Roughness length for heat (in m). The setting of {{{z0h_eb}}} overwrites [wiki:doc/app/inipar#z0h_factor z0h_factor]. In this case, the roughness length for heat is calculated from [wiki:doc/app/inipar#z0h_factor z0h_factor] and {{{z0h_eb}}} (or [wiki:doc/app/inipar#roughness_length #roughness_length]). 528 528 }}} 529 529 |----------------
