Changes between Version 45 and Version 46 of doc/tec/lsm

Timestamp:

Jun 13, 2017 12:19:15 PM (8 years ago)

Author:

maronga

Comment:

--

doc/tec/lsm

@@ -300 +300 @@
 
 == Exception: water surfaces ==
-When prescribing grid points with water surface (i.e. {{{veg_class = 14,15}}}), the energy balance is solved as for land surface without evaporation from vegetation canopy and bare soil. Moreover, the water temperature is constant and time and is derived from the value of {{{pt_surface}}} at model start. In order to obtain realistic results, it is required to set a zero heat capacity for the ocean skin layer (e.g. {{{c_surface = 0.0}}}).
+When prescribing grid points with water surface (i.e. {{{surface_type = 'water'}}}), the energy balance is solved as for land surface without evaporation from vegetation canopy and bare soil. Moreover, the water temperature is constant and time and is derived from the value of {{{pt_surface}}} at model start. In order to obtain realistic results, it is required to set a zero heat capacity for the ocean skin layer (e.g. {{{c_surface = 0.0}}}).
 
 A special feature of the treatment of water surfaces is the treatment of surface roughness chances due to water waves. The roughness lengths for momentum, heat, and moisture (''z'',,0,,, ''z'',,0,h,,, and ''z'',,0,q,, respectively) are hence calculated after [#beljaars Beljaars (1994)] at each grid point as:
@@ -316 +316 @@
 
 == Exception: pavement ==
-It is possible to account for urban land surfaces such as roads by adding a pavement layer to the soil model. This is realized by setting the parameter {{{veg_type = 20}}}. The pavement is steered via a depth ([wiki:doc/app/lsmpar#pave_depth pave_depth]), a heat capacity ([wiki:doc/app/lsmpar#pave_heat_capacity pave_heat_capacity]), and a heat conductivity ([wiki:doc/app/lsmpar#pave_heat_conductivity pave_heat_conductivity]). The pavement then replaces the upper soil layers up to a depth of {{{pave_depth}}}. In case that {{{pave_depth}}} is between two soil layers, the respective heat conductivity and heat capacities are linearly interpolated between the soil value and the pavement value to the respective grid point.
+It is possible to account for urban land surfaces such as roads by adding a pavement layer to the soil model. This is realized by setting the parameter {{{surface_type = 'pavement'}}}. The pavement is steered via a depth ([wiki:doc/app/lsmpar#pave_depth pave_depth]), a heat capacity ([wiki:doc/app/lsmpar#pave_heat_capacity pave_heat_capacity]), and a heat conductivity ([wiki:doc/app/lsmpar#pave_heat_conductivity pave_heat_conductivity]). The pavement then replaces the upper soil layers up to a depth of {{{pave_depth}}}. In case that {{{pave_depth}}} is between two soil layers, the respective heat conductivity and heat capacities are linearly interpolated between the soil value and the pavement value to the respective grid point.
 
 Note that the pavement layer must be at least have the same depth as the uppermost soil layer. If the prescribed pavement depth is too small, it is automatically set to this minimum depth.
@@ -377 +377 @@
 The lsm is activated by specifying a {{{&lsm_par}}} NAMELIST in the _p3d file, e.g.:
 {{{
- &lsm_par veg_type = 2, soil_type = 3,
+ &lsm_par surface_type = 'vegetation',
+          vegetation_type = 2, soil_type = 3,
           conserve_water_content = .T.,
           c_surface = 0.0,
-          zs = 0.07, 0.28, 1.0, 2.89,
-          soil_moisture = 0.0, 0.0, 0.0, 0.0,
-          root_fraction = 0.49, 0.26, 0.25, 0.0,
-          soil_temperature = 279.5, 279.6, 279.1 279.1, 279.1, 
+          zs = 0.005, 0.02, 0.04, 0.07, 0.15, 0.28, 1.0, 2.89,
+          root_fraction = 0.1, 0.2, 0.3, 0.2, 0.1, 0.05, 0.05, 0.0,
+          soil_temperature = 290.0, 289.0, 288.0, 286.0, 285.0, 285.0, 285.0, 285.0,
 /
 }}}