Changes between Version 46 and Version 47 of Documentation/TrunkFunctionality4

Timestamp:

2020-05-04T16:40:59+02:00 (4 years ago)

Author:

luyssaert

Comment:

--

Documentation/TrunkFunctionality4

@@ -237 +237 @@
 
 
+=== Litter resistance to evaporation (r6766) ===
+The default of the flag '''do_rsoil''' has changed to TRUE. When set to TRUE the flag reduces the bare soil evaporation because it accounts for the moisture content of the litter layer (Sellers et al., 1992). The presence of litter always acts as an extra barrier (resistance) to bare soil evaporation. If the litter layer dries out the resistance will even further increase. 
+
+
 === Mortality (r6614) ===
 ORCHIDEE trunk 4 distinguishes 2 types of natural mortality: (1) explicitly considering mortality from disturbances and self-thinning, and (2) implicitly considering background mortality. Ideally, approach (1) should be further developed such that all underlying agents driving background mortality are represented in the model (i.e., gap-scale mortality, pests, disease, windthrow, etc.) such that it can replace approach (2). Two options of background mortality may be chosen: constant background mortality and dynamic background mortality. To use the first option, set the flag '''constant_mortality''' = y. The background mortality of a forests is calculated as a constant, prescribed fraction. In trunk 4, this fraction is given by '''residence_time''' (see also forest management). Otherwise set '''constant_mortality''' = n, the dynamic background mortality of a forest is a function of its net primary production (npp). If npp decreases, mortality will increase Both options have been developed but only '''constant_mortality''' = y has been tested in ORCHIDEE trunk 4. 
@@ -349 +353 @@
 }}}
 
-
-=== Soil resistance (r6766) ===
-The default of the '''do_rsoil''' has changed to TRUE. When TRUE the flag reduces the bare soil evaporation because it accounts for the moisture content of the litter layer (Sellers et al., 1992). The presence of litter always acts as an extra barrier (resistance) to bare soil evaporation. If the litter layer dries out the resistance will even further increase. 
-            
 
 === Single vs multi layer energy budget (r6614) ===