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. |
| 4 | Input 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. |
| 5 | The static input file, indicated by the filename supplement _STATIC, contains all static information, such as topography, geographical latitude and longitude, surface and vegetation information. |
| 6 | The dynamic input file, indicated by the filename supplement _DYNAMIC, contains dynamic information on the initial state of the atmosphere or time-dependent boundary conditions. |
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. |
| 10 | An example NCL-script to create a simple static input file can be found here. |
| 11 | To 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. |
| 20 | The 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.. |
| 21 | The 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. |
| 22 | In 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. |
| 23 | In a second step, surfaces are initialized individually by providing the bulk classification at each grid point individually. |
| 24 | In case more detailed information is available, all or even single parameters can be initialized individually at each grid point. |
| 25 | |
| 26 | 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. |
| 27 | In case no land-surface or urban-surface scheme is applied, all surfaces are classified as default-type. |
| 28 | 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. |