Changes between Version 66 and Version 67 of doc/app/initialization_parameters


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Timestamp:
Sep 14, 2010 2:06:57 PM (14 years ago)
Author:
kanani
Comment:

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  • doc/app/initialization_parameters

    v66 v67  
    1515
    1616[=#mode '''Mode:]\\
    17 ||='''Parameter Name'''  =||='''FORTRAN Type'''  =||='''Default Value'''  =||='''Explanation'''  =||
    18 |----------------
    19 {{{#!td style="vertical-align:top; text-align:left;width: 150px"
    20 [=#ocean '''ocean''']
    21 }}}
    22 {{{#!td style="vertical-align:top; text-align:left;style="width: 50px"
     17||='''Parameter Name'''  =||='''FORTRAN\\Type'''  =||='''Default\\Value'''  =||='''Explanation'''  =||
     18|----------------
     19{{{#!td style="vertical-align:top;width: 150px"
     20[=#cloud_droplets '''cloud_droplets''']
     21}}}
     22{{{#!td style="vertical-align:top;width: 50px"
    2323L
    2424}}}
    25 {{{#!td style="vertical-align:top; text-align:left;style="width: 100px"
    26 .F.
    27 }}}
    28 {{{#!td
    29 Parameter to switch on ocean runs.\\\\
    30 By 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.[[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 
    45     * If switched on, random perturbations are by default imposed to the upper model domain from zu(nzt*2/3) to zu(nzt-3).\\\\
    46 Relevant 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].\\\\
    47 Section [[4.4.2]] gives an example for appropriate settings of these and other parameters neccessary for ocean runs.\\\\
    48 '''ocean''' = ''.T.'' does not allow settings of [#timestep_scheme timestep_scheme] = '' 'leapfrog' '' or '' 'leapfrog+euler' '' as well as [#scalar_advec scalar_advec] = '' 'ups-scheme'.''
    49 }}}
    50 |----------------
    51 {{{#!td style="vertical-align:top"
    52 [=#cloud_droplets '''cloud_droplets''']
    53 }}}
    54 {{{#!td style="vertical-align:top"
    55 L
    56 }}}
    57 {{{#!td style="vertical-align:top"
     25{{{#!td style="vertical-align:top;width: 75px"
    5826.F.
    5927}}}
     
    292260The horizontal range of the smoothing is controlled by [#outflow_damping_width outflow_damping_width] which defines the number of gridpoints (counted from the outflow boundary) from where on the smoothing is applied. Starting from that point, the eddy diffusivity is linearly increased (from zero to its maximum value given by '''km_damp_max''') until half of the damping range width, from where it remains constant up to the outflow boundary. If at a certain grid point the eddy diffusivity calculated from the flow field is larger than as described above, it is used instead.\\\\
    293261The default value of '''km_damp_max''' has been empirically proven to be sufficient.
     262}}}
     263|----------------
     264{{{#!td style="vertical-align:top"
     265[=#ocean '''ocean''']
     266}}}
     267{{{#!td style="vertical-align:top"
     268L
     269}}}
     270{{{#!td style="vertical-align:top"
     271.F.
     272}}}
     273{{{#!td
     274Parameter to switch on ocean runs.\\\\
     275By 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:\\\\
     276    * An additional prognostic equation for salinity is solved.[[BR]]
     277
     278    * Potential temperature in buoyancy and stability-related terms is replaced by potential density.[[BR]]
     279
     280    * 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]]
     281
     282      So far, only the initial hydrostatic pressure is entered into this equation.[[BR]]
     283
     284    * 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]]
     285
     286    * 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]]
     287
     288    * Zero salinity flux is used as default boundary condition at the bottom of the sea.[[BR]]
     289
     290    * If switched on, random perturbations are by default imposed to the upper model domain from zu(nzt*2/3) to zu(nzt-3).\\\\
     291Relevant 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].\\\\
     292Section [[4.4.2]] gives an example for appropriate settings of these and other parameters neccessary for ocean runs.\\\\
     293'''ocean''' = ''.T.'' does not allow settings of [#timestep_scheme timestep_scheme] = '' 'leapfrog' '' or '' 'leapfrog+euler' '' as well as [#scalar_advec scalar_advec] = '' 'ups-scheme'.''
    294294}}}
    295295|----------------