Changes between Version 95 and Version 96 of doc/app/initialization_parameters

Timestamp:

Sep 15, 2010 12:18:21 PM (16 years ago)

Author:

kanani

Comment:

--

doc/app/initialization_parameters

@@ -1545 +1545 @@
 |----------------
 {{{#!td style="vertical-align:top"
-[=#<insert_parameter_name> '''<insert_parameter_name>''']
-}}}
-{{{#!td style="vertical-align:top"
-<insert type>
-}}}
-{{{#!td style="vertical-align:top"
-<insert value>
-}}}
-{{{#!td
-<insert explanation>
-}}}
-|----------------
-{{{#!td style="vertical-align:top"
-[=#<insert_parameter_name> '''<insert_parameter_name>''']
-}}}
-{{{#!td style="vertical-align:top"
-<insert type>
-}}}
-{{{#!td style="vertical-align:top"
-<insert value>
-}}}
-{{{#!td
-<insert explanation>
-}}}
-|----------------
-{{{#!td style="vertical-align:top"
-[=#<insert_parameter_name> '''<insert_parameter_name>''']
-}}}
-{{{#!td style="vertical-align:top"
-<insert type>
-}}}
-{{{#!td style="vertical-align:top"
-<insert value>
-}}}
-{{{#!td
-<insert explanation>
+[=#surface_heatflux '''surface_heatflux''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+no prescribed\\
+heatflux
+}}}
+{{{#!td
+Kinematic sensible heat flux at the bottom surface (in K m/s).\\\\
+If a value is assigned to this parameter, the internal two-dimensional surface heat flux field '''shf''' is initialized with the value of '''surface_heatflux''' as bottom (horizontally homogeneous) boundary condition for the temperature equation. This additionally requires that a Neumann condition must be used for the potential temperature (see [#bc_pt_b bc_pt_b]), because otherwise the resolved scale may contribute to the surface flux so that a constant value cannot be guaranteed. Also, changes of the surface temperature (see [#pt_surface_initial_change pt_surface_initial_change]) are not allowed. The parameter [#random_heatflux random_heatflux] can be used to impose random perturbations on the (homogeneous) surface heat flux field '''shf'''.\\\\
+'''Attention:'''\\
+Setting of '''surface_heatflux''' requires setting of [#use_surface_fluxes use_surface_fluxes] = ''.T.,'' if the Prandtl-layer is switched off ([#prandtl_layer prandtl_layer] = ''.F.'').\\\\
+In case of a non-flat topography, the internal two-dimensional surface heat flux field '''shf''' is initialized with the value of '''surface_heatflux''' at the bottom surface and [#wall_heatflux wall_heatflux](0) at the topography top face. The parameter random_heatflux can be used to impose random perturbations on this combined surface heat flux field '''shf'''.\\\\
+If no surface heat flux is assigned, '''shf''' is calculated at each timestep by u,,*,, {{{*}}} theta,,*,, (of course only with [#prandtl_layer prandtl_layer] switched on). Here, u,,*,, and theta,,*,, are calculated from the Prandtl law assuming logarithmic wind and temperature profiles between k=0 and k=1. In this case a Dirichlet condition (see [#bc_pt_b bc_pt_b]) must be used as bottom boundary condition for the potential temperature.\\\\
+See also [#top_heatflux top_heatflux].
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#surface_scalarflux '''surface_scalarflux''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+0.0
+}}}
+{{{#!td
+Scalar flux at the surface (in kg/(m^2^ s)).\\\\
+If a non-zero value is assigned to this parameter, the respective scalar flux value is used as bottom (horizontally homogeneous) boundary condition for the scalar concentration equation. This additionally requires that a Neumann condition must be used for the scalar concentration (see [#bc_s_b bc_s_b]), because otherwise the resolved scale may contribute to the surface flux so that a constant value cannot be guaranteed. Also, changes of the surface scalar concentration (see [#s_surface_initial_change s_surface_initial_change]) are not allowed.\\\\
+If no surface scalar flux is assigned ('''surface_scalarflux''' = ''0.0''), it is calculated at each timestep by u,,*,, {{{*}}} s,,*,, (of course only with [#prandtl_layer prandtl_layer] switched on). Here, s,,*,, is calculated from the Prandtl law assuming a logarithmic scalar concentration profile between k=0 and k=1. In this case a Dirichlet condition (see bc_s_b) must be used as bottom boundary condition for the scalar concentration.
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#surface_waterflux '''surface_waterflux''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+0.0
+}}}
+{{{#!td
+Kinematic water flux near the surface (in m/s).\\\\
+If a non-zero value is assigned to this parameter, the respective water flux value is used as bottom (horizontally homogeneous) boundary condition for the humidity equation. This additionally requires that a Neumann condition must be used for the specific humidity / total water content (see [#bc_q_b bc_q_b]), because otherwise the resolved scale may contribute to the surface flux so that a constant value cannot be guaranteed. Also, changes of the surface humidity (see [#q_surface_initial_change q_surface_initial_change]) are not allowed.\\\\
+If no surface water flux is assigned ('''surface_waterflux''' = ''0.0''), it is calculated at each timestep by u,,*,, {{{*}}} q,,*,, (of course only with Prandtl layer switched on). Here, q,,*,, is calculated from the Prandtl law assuming a logarithmic temperature profile between k=0 and k=1. In this case a Dirichlet condition (see bc_q_b) must be used as the bottom boundary condition for the humidity.
 }}}
 |----------------
@@ -2238 +2249 @@
 |----------------
 {{{#!td style="vertical-align:top"
-[=#<insert_parameter_name> '''<insert_parameter_name>''']
-}}}
-{{{#!td style="vertical-align:top"
-<insert type>
-}}}
-{{{#!td style="vertical-align:top"
-<insert value>
-}}}
-{{{#!td
-<insert explanation>
-}}}
-|----------------
-{{{#!td style="vertical-align:top"
-[=#<insert_parameter_name> '''<insert_parameter_name>''']
-}}}
-{{{#!td style="vertical-align:top"
-<insert type>
-}}}
-{{{#!td style="vertical-align:top"
-<insert value>
-}}}
-{{{#!td
-<insert explanation>
-}}}
+[=#scalar_exchange_coefficient '''scalar_exchange_coefficient''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+0.0
+}}}
+{{{#!td
+Scalar exchange coefficient for a leaf (dimensionless).\\\\
+This parameter is only of importance in cases in that both, [#plant_canopy plant_canopy] and [#passive_scalar passive_scalar], are set ''.T.''. The value of the scalar exchange coefficient is required for the parametrisation of the sources and sinks of scalar concentration due to the canopy.
+}}}
+|----------------
 [[BR]]