Changes between Version 138 and Version 139 of doc/app/initialization_parameters

Timestamp:

Dec 15, 2010 8:46:34 AM (14 years ago)

Author:

kanani

Comment:

--

doc/app/initialization_parameters

@@ -2544 +2544 @@
 Switch for the plant canopy model.\\\\
 If '''plant_canopy''' is set ''.T.'', the plant canopy model of Watanabe (2004, BLM 112, 307-341) is used.\\
-The impact of a plant canopy on a turbulent flow is considered by an additional drag term in the momentum equations and an additional sink term in the prognostic equation for the subgrid-scale TKE. These additional terms are dependent on the leaf drag coefficient (see [#drag_coefficient drag_coefficient]) and the leaf area density (see [#lad_surface lad_surface], [#lad_vertical_gradient lad_vertical_gradient], [#lad_vertical_gradient_level lad_vertical_gradient_level). The top boundary of the plant canopy is determined by the parameter [#pch_index pch_index]. For all heights equal to or larger than zw(k=pch_index) the leaf area density is 0 (i.e. there is no canopy at these heights!).\\
+The impact of a plant canopy on a turbulent flow is considered by an additional drag term in the momentum equations and an additional sink term in the prognostic equation for the subgrid-scale TKE. These additional terms are dependent on the leaf drag coefficient (see [#drag_coefficient drag_coefficient]) and the leaf area density (see [#lad_surface lad_surface], [#lad_vertical_gradient lad_vertical_gradient], [#lad_vertical_gradient_level lad_vertical_gradient_level]). The top boundary of the plant canopy is determined by the parameter [#pch_index pch_index]. For all heights equal to or larger than zw(k=pch_index) the leaf area density is 0 (i.e. there is no canopy at these heights!).\\
 By default, a horizontally homogeneous plant canopy is prescribed, if  '''plant_canopy''' is set ''.T.''. However, the user can define other types of plant canopies (see [#canopy_mode canopy_mode]).\\\\
 If '''plant_canopy''' and  [#passive_scalar passive_scalar] are set ''.T.'', the canopy acts as an additional source or sink, respectively, of scalar concentration. The source/sink strength is dependent on the scalar concentration at the leaf surface, which is generally constant with time in PALM and which can be specified by specifying the parameter [#leaf_surface_concentration leaf_surface_concentration].\\\\