Changes between Version 62 and Version 63 of doc/tec/lsm


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Timestamp:
Feb 24, 2021 5:21:36 PM (4 years ago)
Author:
wagner
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  • doc/tec/lsm

    v62 v63  
    339339
    340340== Exception: pavement ==
    341 It is possible to account for urban land surfaces such as roads by adding a pavement layer to the soil model. This is realized by setting the parameter {{{surface_type = 'pavement'}}}. The pavement is steered via a depth ([wiki:doc/app/lsmpar#pave_depth pave_depth]), a heat capacity ([wiki:doc/app/lsmpar#pave_heat_capacity pave_heat_capacity]), and a heat conductivity ([wiki:doc/app/lsmpar#pave_heat_conductivity pave_heat_conductivity]). The pavement then replaces the upper soil layers up to a depth of {{{pave_depth}}}. In case that {{{pave_depth}}} is between two soil layers, the respective heat conductivity and heat capacities are linearly interpolated between the soil value and the pavement value to the respective grid point.
     341It is possible to account for urban land surfaces such as roads by adding a pavement layer to the soil model. This is realized by setting the parameter {{{surface_type = 'pavement'}}}. The pavement is steered via a depth ([wiki:doc/app/land_surface_parameters#pave_depth pave_depth]), a heat capacity ([wiki:doc/app/land_surface_parameters#pave_heat_capacity pave_heat_capacity]), and a heat conductivity ([wiki:doc/app/land_surface_parameters#pave_heat_conductivity pave_heat_conductivity]). The pavement then replaces the upper soil layers up to a depth of {{{pave_depth}}}. In case that {{{pave_depth}}} is between two soil layers, the respective heat conductivity and heat capacities are linearly interpolated between the soil value and the pavement value to the respective grid point.
    342342
    343343Note that the pavement layer must be at least have the same depth as the uppermost soil layer. If the prescribed pavement depth is too small, it is automatically set to this minimum depth.
     
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    413413}}}
    414 In particular, PALM provides a set of predefined land surface types (parameter [wiki:doc/app/lsmpar#vegetation_type vegetation_type]) for which typical parameters are used to intialize the model. Moreover, a set of predefined soil types can be chosen (parameter [wiki:doc/app/lsmpar#soil_type soil_type]). You can overwrite the default parameters by explicitly prescribing them in the namelist.
     414In particular, PALM provides a set of predefined land surface types (parameter [wiki:doc/app/land_surface_parameters#vegetation_type vegetation_type]) for which typical parameters are used to intialize the model. Moreover, a set of predefined soil types can be chosen (parameter [wiki:doc/app/land_surface_parameters#soil_type soil_type]). You can overwrite the default parameters by explicitly prescribing them in the namelist.
    415415
    416416Note that the surface albedo is part of the radiation scheme and is steered via the parameter [wiki:doc/app/radpar#albedo_type albedo_type].