Changes between Version 60 and Version 61 of doc/app/iofiles/pids


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Timestamp:
May 31, 2018 10:31:37 AM (7 years ago)
Author:
suehring
Comment:

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  • doc/app/iofiles/pids

    v60 v61  
    1 '''!!! Currently under construction !!!'''
    21
    32PALM-4U provides a standardized way via the NetCDF data format to input e.g. global attributes, topography data or surface properties, vegetation properties, etc., as well as initialization data and boundary conditions for the prognostic variables.
    43
    5 Input variables are distinguished between [#static_input static], [#dynamic_input dynamic], [#rad_input radiation] and [#chem_input chemistry] input variables, while for each type a separate input file exists.
    6 The static input file, indicated by the filename supplement _STATIC, contains all static information, such as topography, geographical latitude and longitude, surface property and vegetation information.
    7 The dynamic input file, indicated by the filename supplement _STATIC, contains dynamic information on the initial state of the atmosphere or time-dependent boundary conditions.
     4Input variables are distinguished between [#static_input static], [#dynamic_input dynamic], [#rad_input radiation] and [#chem_input chemistry] input variables, while for each a separate input file exists.
     5The static input file, indicated by the filename supplement _STATIC, contains all static information, such as topography, geographical latitude and longitude, surface and vegetation information.
     6The dynamic input file, indicated by the filename supplement _DYNAMIC, contains dynamic information on the initial state of the atmosphere or time-dependent boundary conditions.
    87The radiation input file, indicated by _RAD, contains static and dynamic information on radiation properties such as trace gas profiles or sky-view factors.
    98The chemistry input file, indicated by _CHEM, contains static and dynamic information on chemical species and emissions. 
    109
    11 The initialization procedure for the surface elements follows a multi-step approach, depending on the given level of detail.
    12 In a first step, surfaces elements are initialized horizontally homogeneous with a bulk classification for each type (e.g. vegetation or soil), either set by a default value or set by a namelist-provided value, while the bulk classification provides standard values for a variety of parameters.
    13 In a second step, surface elements are initialized individually by providing the bulk classification at each grid point.
    14 In case more detailed information is available, all/single parameters can also initialized individually at each grid point.
    15 
    16 The provided input data is used to classify each surface element according to its treatment, i.e. default-, natural- or urban-type, in order to treat each surface element accordingly.
    17 In case no land-surface or urban-surface scheme is applied, all surfaces are classified as default-type.
    18 If a surface element has vegetation, pavement or water, it will be classified as natural-type and is treated by the land-surface scheme, while building surfaces will be treated by the urban-surface scheme.
     10An example NCL-script to create a simple static input file can be found here.
     11To create a dynamic driver, PALM-4U provides the pre-processing tool [#inifor inifor], which extracts 1D/3D initialization data for the soil and atmosphere as well as boundary data for the PALM-4U domain from COSMO output.
    1912
    2013After reading the input files, PALM-4U performs consistency checks on the provided data. 
     
    2518[=#static_input '''Static input file''']
    2619
     20The static input file encompasses topography information as well as all necessary information file to initialize all land- and urban-type surfaces in the model, such as heat capacities, roughness, albedo, emissivity, etc..
     21The initialization procedure for the surfaces follows a multi-step approach, depending on the given level of detail of each provided variable in the static input file.
     22In a first step, surfaces are initialized horizontally homogeneous with a bulk classification for each type (e.g. vegetation or soil), either set by a default value or set by a namelist-provided value, while the bulk classification provides standard values for a variety of parameters.
     23In a second step, surfaces are initialized individually by providing the bulk classification at each grid point individually.
     24In case more detailed information is available, all or even single parameters can be initialized individually at each grid point.
     25
     26The provided input data is used to classify each surface element according to its treatment, i.e. default-, natural- or urban-type, in order to treat each surface element accordingly.
     27In case no land-surface or urban-surface scheme is applied, all surfaces are classified as default-type.
     28If a surface element has vegetation, pavement or water, it will be classified as natural-type and is treated by the land-surface scheme, while building surfaces will be treated by the urban-surface scheme.
    2729
    2830[=#attr '''Global attributes:]\\\\