Changes between Version 205 and Version 206 of doc/app/initialization_parameters

Timestamp:

Jun 11, 2013 3:56:46 PM (12 years ago)

Author:

raasch

Comment:

--

doc/app/initialization_parameters

@@ -358 +358 @@
 If a near surface heat flux is used as bottom boundary condition (see [#surface_heatflux surface_heatflux]), it is by default assumed to be horizontally homogeneous. Random perturbations can be imposed on the internal two-dimensional heat flux field '''shf''' by assigning '''random_heatflux''' = ''.T.''. The disturbed heat flux field is calculated by multiplying the values at each mesh point with a normally distributed random number with a mean value and standard deviation of 1. This is repeated after every timestep.\\\\
 In case of a non-flat topography, assigning '''random_heatflux''' = ''.T.'' imposes random perturbations on the combined heat flux field '''shf''' composed of surface_heatflux at the bottom surface and [#wall_heatflux wall_heatflux](0) at the topography top face.
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#reference_state '''reference_state''']
+}}}
+{{{#!td style="vertical-align:top"
+C*20
+}}}
+{{{#!td style="vertical-align:top"
+'' 'initial_profile' ''
+}}}
+{{{#!td
+This parameter defines what is used as reference state in the buoyancy term. There are three options:
+
+'' 'initial profile' ''\\
+     The initial vertical potential temperature profile will be used. See [#pt_surface pt_surface] and [#pt_vertical_gradient pt_vertical_gradient] for how to set the initial profile. In case of runs with humidity, the virtual potential temperature will be used instead. In ocean runs, density is used (calculated from the initial potential temperature and salinity profile).
+
+'' 'horizontal_average' ''\\
+     The instantaneous horizontally averaged potential temperature profile will be used. Please be aware that this causes the reference state to change in time. In case of runs with humidity, the virtual potential temperature will be used instead. In ocean runs, density is used.
+
+'' 'single_value' ''\\
+     A constant single potential temperature value is used as reference state. The respective value can be defined with parameter [#pt_reference pt_reference].
+     '''Warning:''' In case of runs with humidity, the virtual potential temperature is used, which is calculated from {{{pt_reference}}} and the surface specific humidity (see [#q_surface q_surface]).
+     In ocean runs, the reference value cannot be explicitly set by the user. Instead, it is calculated as the vertical average of the initial potential density profile.
 }}}
 |----------------