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Changes between Version 49 and Version 50 of doc/app/land_surface_parameters


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Timestamp:
Jun 13, 2017 2:07:17 PM (8 years ago)
Author:
maronga
Comment:

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  • doc/app/land_surface_parameters

    v49 v50  
    44Since 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].
    55
    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 
    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.
     6All 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 types], 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.
     7
     8A minimum configuration of the LSM requires setting of the parameters [#soil_type soil_type], and [#vegetation_type vegetation_type]. Setting of initial vertical profiles of [#soil_temperature soil_temperature] and [#soil_moisture soil_moisture] is recommended.
    99
    1010Note that the use of the LSM requires using a [wiki:doc/tec/radiation radiation model].
    … …  
    4949}}}
    5050{{{#!td style="vertical-align:top"
    51 depending on [#veg_type veg_type]
     51depending on [#vegetation_type vegetation_type]
    5252}}}
    5353{{{#!td
    … …  
    100100}}}
    101101{{{#!td style="vertical-align:top"
    102 depending on [#veg_type veg_type]
     102depending on [#vegetation_type vegetation_type]
    103103}}}
    104104{{{#!td
    … …  
    126126}}}
    127127{{{#!td style="vertical-align:top"
    128 depending on [#veg_type veg_type]
     128depending on [#vegetation_type vegetation_type]
    129129}}}
    130130{{{#!td
    … …  
    139139}}}
    140140{{{#!td style="vertical-align:top"
    141 depending on [#veg_type veg_type]
     141depending on [#vegetation_type vegetation_type]
    142142}}}
    143143{{{#!td
    … …  
    152152}}}
    153153{{{#!td style="vertical-align:top"
    154 depending on [#veg_type veg_type]
     154depending on [#vegetation_type vegetation_type]
    155155}}}
    156156{{{#!td
    … …  
    178178}}}
    179179{{{#!td style="vertical-align:top"
    180 depending on [#veg_type veg_type]
     180depending on [#vegetation_type vegetation_type]
    181181}}}
    182182{{{#!td
    … …  
    207207}}}
    208208{{{#!td
    209 Depth of the paved surface. This parameter is only considered if {{{veg_type = 20}}}.
     209Depth of the paved surface.
    210210}}}
    211211|----------------
    … …  
    220220}}}
    221221{{{#!td
    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}}}.
     222Heat capacity of the pavement. The default value is a typical value for asphalt of roads.
    223223}}}
    224224|----------------
    … …  
    233233}}}
    234234{{{#!td
    235 Heat conductivity of the pavement. The default value is a typical value for asphalt of roads. This parameter is only considered, when {{{veg_type = 20}}}.
     235Heat conductivity of the pavement. The default value is a typical value for asphalt of roads.
    236236}}}
    237237|----------------
    … …  
    295295}}}
    296296{{{#!td style="vertical-align:top"
    297 depending on [#veg_type veg_type]
     297depending on [#vegetation_type vegetation_type]
    298298}}}
    299299{{{#!td
    … …  
    407407}}}
    408408{{{#!td style="vertical-align:top"
    409 depending on [#veg_type veg_type]
     409depending on [#vegetation_type vegetation_type]
    410410}}}
    411411{{{#!td
    … …  
    426426
    427427The user can choose from 19 different pre-defined vegetation classes according to the ECMWF-IFS classification:
    428 ||= '''veg_type'''=||='''Description''' =||
     428||= '''vegetation_type'''=||='''Description''' =||
    429429|| 0||user defined ||
    430430|| 1||bare soil ||
    … …  
    449449(* not yet implemented)
    450450
    451 The following parameters will then be automatically set: [#min_canopy_resistance min_canopy_resistance] (r_c_min), [#leaf_area_index leaf_area_index] (LAI), [#vegetation_coverage vegetation_coverage] (c_veg), [#canopy_resistance_coefficient canopy_resistance_coefficient] (gD), [#z0_eb z0_eb], [#z0h_eb z0h_eb], [#lambda_surface_stable lambda_surface_stable] (lambda_s), [#lambda_surface_unstable lambda_surface_unstable] (lambda_u), [#f_shortwave_incoming f_shortwave_incoming] (f_sw_in), [#root_fraction root_fraction]. The following tables provide an overview of the parameter values.
     451The following parameters will then be automatically set: [#min_canopy_resistance min_canopy_resistance] (r_c_min), [#leaf_area_index leaf_area_index] (LAI), [#vegetation_coverage vegetation_coverage] (c_veg), [#canopy_resistance_coefficient canopy_resistance_coefficient] (gD), [#z0_vegetation z0_vegetation], [#z0h_vegetation z0h_vegetation], [#lambda_surface_stable lambda_surface_stable] (lambda_s), [#lambda_surface_unstable lambda_surface_unstable] (lambda_u), [#f_shortwave_incoming f_shortwave_incoming] (f_sw_in), [#root_fraction root_fraction]. The following tables provide an overview of the parameter values.
    452452
    453453||= '''vegetation_type'''=||='''r_c_min (s/m)''' =||='''LAI (m²/m²)''' =||='''c_veg''' =||='''gD (1/hPa)''' =||='''z0_vegetation (m)''' =||='''z0h_vegetation''' =||='''lambda_s (W/m²/K)''' =||='''lambda_u (W/m²/K)''' =||='''f_sw_in''' =||
                                                                                                                                                                                                                                                                                                                                                                               
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