Changes between Version 178 and Version 179 of DevelopmentActivities/ORCHIDEE-DOFOCO

Timestamp:

2018-11-29T19:07:06+01:00 (5 years ago)

Author:

luyssaert

Comment:

--

DevelopmentActivities/ORCHIDEE-DOFOCO

@@ -160 +160 @@
 Following a disturbance (which could be a clear cut), tree species changes and forest management change can be prescribed or read from a map in ORCHIDEE-CAN. Set '''lchange_species''' = y, '''read_species_change_map''' = y, and '''read_desired_fm_map''' = y and specify the paths of those maps in the COMP/stomate.card. This functionality replaces the DGVM in areas where humans rather than nature govern species distribution, for example, Europe. Note that there are some constraints on the possible species changes. If the forest is unmanaged (fm=1), the code assumes that nature will determine the species rather than humans. Anthropogenic species change has not been developed to work together with land cover change. For the moment it is one or the other.  
 
-=== Bare soil (in progress) ===
-Total bare soil is still calculated as a function of veget. Fraction of bare soil in the mesh (bio+nobio). Given the new albedo scheme we should no longer do this. What happens in a PFT stays in a PFT. We should not move the gaps between the canopy to the bare soil. We no longer want to treat the gaps in the canopy as bare soil. It needs to be tested what will happen with the evaporation in the single-layer model. The multi-layer energy budget should be able to correctly deal with the gaps in the canopy. '''ok_bare_soil_new'''
+=== Bare soil (under development) ===
+The flag '''ok_bare_soil_new''' controls how the bare soil is perceived and calculated. If set to FALSE the total bare soil is still calculated as a function of veget. When a deciduous PFT sheds its leaves, the gaps in the forest will contribute to bare soil fraction in the grid. Although this approach was introduced a long time ago to get acceptable evaporation estimates from forest, the approach also resulted in using the albedo of deserts as the background albedo of forest gaps. The new albedo scheme considers a specific background albedo for each PFT and calculates the albedo of the PFT including the canopy gaps. Moving gaps to the bare soil is no longer needed. So, if '''ok_bare_soil_new'''is set to TRUE, canopy gaps no longer contribute to the bare soil. It needs to be tested what will happen with the evaporation in the single-layer model. The multi-layer energy budget should be able to correctly deal with the gaps in the canopy because the diffusivity will increase when the canopy is becoming sparser. 
 
 === C13 ===
@@ -382 +382 @@
 The initial values of carbon for the four SOM pools are used globally. Sensitivity test have shown that the analytic spin-up is not sensitive to the actual size of the initial values. The different system will after a while settle in to there own state (N limited or saturated) in spite of having the same initial state. 
 
-=== Start and restart ===
+=== Start and restart (under development)===
+
+The table below shows typical configurations to start and restart ORCHIDEE-CN-CAN
 || '''Sechiba''' || || || || '''stomate''' || || ||
 || '''Restart''' || '''impveg''' || '''impsoil''' || '''laimap''' || '''ok_stomate''' || '''restart''' || '''Comment''' ||