Changes between Version 44 and Version 45 of doc/app/initialization_parameters


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Timestamp:
Sep 14, 2010 8:40:17 AM (14 years ago)
Author:
kanani
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  • doc/app/initialization_parameters

    v44 v45  
    2929Parameter to switch on ocean runs.\\\\
    3030By default PALM is configured to simulate atmospheric flows. However, starting from version 3.3, '''ocean''' = ''.T.'' allows simulation of ocean turbulent flows. Setting this switch has several effects:\\\\
    31     * An additional prognostic equation for salinity is solved.\\
    32     * Potential temperature in buoyancy and stability-related terms is replaced by potential density.\\
    33     * Potential density is calculated from the equation of state for seawater after each timestep, using the algorithm proposed by Jackett et al. (2006, J. Atmos. Oceanic Technol., '''23''', 1709-1728).\\
    34       So far, only the initial hydrostatic pressure is entered into this equation.\\
    35     * z=0 (sea surface) is assumed at the model top (vertical grid index k=[#nzt nzt] on the w-grid), with negative values of z indicating the depth.\\
    36     * Initial profiles are constructed (e.g. from [#pt_vertical_gradient pt_vertical_gradient] / [#pt_vertical_gradient_level pt_vertical_gradient_level]) starting from the sea surface, using surface values given by [#pt_surface pt_surface], [#sa_surface sa_surface], [#ug_surface ug_surface], and [#vg_surface vg_surface].\\
    37     * Zero salinity flux is used as default boundary condition at the bottom of the sea.\\
     31    * An additional prognostic equation for salinity is solved.[[BR]]
     32
     33    * Potential temperature in buoyancy and stability-related terms is replaced by potential density.[[BR]]
     34
     35    * Potential density is calculated from the equation of state for seawater after each timestep, using the algorithm proposed by Jackett et al. (2006, J. Atmos. Oceanic Technol., '''23''', 1709-1728).[[BR]]
     36
     37      So far, only the initial hydrostatic pressure is entered into this equation.[[BR]]
     38
     39    * z=0 (sea surface) is assumed at the model top (vertical grid index k=[#nzt nzt] on the w-grid), with negative values of z indicating the depth.[[BR]]
     40
     41    * Initial profiles are constructed (e.g. from [#pt_vertical_gradient pt_vertical_gradient] / [#pt_vertical_gradient_level pt_vertical_gradient_level]) starting from the sea surface, using surface values given by [#pt_surface pt_surface], [#sa_surface sa_surface], [#ug_surface ug_surface], and [#vg_surface vg_surface].[[BR]]
     42
     43    * Zero salinity flux is used as default boundary condition at the bottom of the sea.[[BR]]
     44
    3845    * If switched on, random perturbations are by default imposed to the upper model domain from zu(nzt*2/3) to zu(nzt-3).\\\\
    3946Relevant parameters to be exclusively used for steering ocean runs are [#bc_sa_t bc_sa_t], [#bottom_salinityflux bottom_salinityflux], [#sa_surface sa_surface], [#sa_vertical_gradient sa_vertical_gradient], [#sa_vertical_gradient_level sa_vertical_gradient_level], and [#top_salinityflux top_salinityflux].\\\\
     
    610617This parameter is used to switch on a damping layer for the 1d-model, which is generally needed for the damping of inertia oscillations. Damping is done by gradually increasing the value of the eddy diffusivities about 10% per vertical grid level (starting with the value at the height given by '''damp_level_1d''', or possibly from the next grid pint above), i.e. K,,m,,(k+1) = 1.1 * K,,m,,(k). The values of K,,m,, are limited to 10 m^2^/s at maximum.\\\\
    611618This parameter only comes into effect if the 1d-model is switched on for the initialization of the 3d-model using [#initializing_actions initializing_actions] = '' 'set_1d-model_profiles'.''
     619}}}
     620|----------------
     621{{{#!td style="vertical-align:top"
     622[=#dissipation_1d '''dissipation_1d''']
     623}}}
     624{{{#!td style="vertical-align:top"
     625C*20
     626}}}
     627{{{#!td style="vertical-align:top"
     628'as_in_3d_model'
     629}}}
     630{{{#!td
     631Calculation method for the energy dissipation term in the TKE equation of the [[1d-model]].\\\\
     632By default the dissipation is calculated as in the 3d-model using diss = (0.19 + 0.74 * l / l_grid) * e{{{**}}}1.5 / l.\\\\
     633Setting '''dissipation_1d''' = '' 'detering' '' forces the dissipation to be calculated as diss = 0.064 * e{{{**}}}1.5 / l.
     634}}}
     635|----------------
     636{{{#!td style="vertical-align:top"
     637[=#<insert_parameter_name> '''<insert_parameter_name>''']
     638}}}
     639{{{#!td style="vertical-align:top"
     640<insert type>
     641}}}
     642{{{#!td style="vertical-align:top"
     643<insert value>
     644}}}
     645{{{#!td
     646<insert explanation>
     647}}}
     648|----------------
     649{{{#!td style="vertical-align:top"
     650[=#<insert_parameter_name> '''<insert_parameter_name>''']
     651}}}
     652{{{#!td style="vertical-align:top"
     653<insert type>
     654}}}
     655{{{#!td style="vertical-align:top"
     656<insert value>
     657}}}
     658{{{#!td
     659<insert explanation>
     660}}}
     661|----------------
     662{{{#!td style="vertical-align:top"
     663[=#<insert_parameter_name> '''<insert_parameter_name>''']
     664}}}
     665{{{#!td style="vertical-align:top"
     666<insert type>
     667}}}
     668{{{#!td style="vertical-align:top"
     669<insert value>
     670}}}
     671{{{#!td
     672<insert explanation>
    612673}}}
    613674|----------------