Changes between Version 2 and Version 3 of Documentation/UserGuide/ImposeVegetation

Timestamp:

2013-09-13T14:06:23+02:00 (11 years ago)

Author:

luyssaert

Comment:

--

Documentation/UserGuide/ImposeVegetation

@@ -1 +1 @@
 = How to prescribe (or impose in ORCHIDEE terminology) the vegetation in a pixel? =
 
-Many new ORCHIDEE users will impose their preferred vegetation to a single pixel. This has the advantage that simulations go faster, output files are smaller, data-model comparison is more straightforward and it is easier to understand the effect of specific settings and parameters.
+Many new ORCHIDEE users will impose their preferred vegetation to a single pixel. This has the advantage that simulations go faster, output files are smaller, data-model comparison is more straightforward and it is easier to understand the effect of specific settings and parameters. To do so you will to make changes to ../config/ORCHIDEE_OL/COMP/sechiba.card and ../config/ORCHIDEE_OL/PARAM/run.def 
 
-
-First, state that you no longer want to impose the vegetation
+First, state that you want to impose the vegetation
 {{{
 # IMPOSE_VEG=y/n
-IMPOSE_VEG=n
+IMPOSE_VEG=y
 }}}
 
-Use the same land cover map for all the years in your simulation. Thus don't make use of land cover change (see another how to for the settings to account for land cover change)
+Make sure you don't overwrite your own settings in the next time step, hence, switch of land cover change
 {{{
 # Set LAND_COVER_CHANGE=y if VEGET_UPDATE > 0
@@ -17 +16 @@
 
 
-Because land cover change is not accounted for, the land cover map should never be updated
+Obviuosly, you don't want to update the land cover map because you're not using one
 {{{
 # VEGET_UPDATE=0Y no change in PFTmap. PFTmap should be set only in InitialStateFiles/List. 
@@ -25 +24 @@
 }}}
 
-The land cover map is now a map that needs to be read at the start of the simulation. It represents part of the initial state of the model
+The land cover map should not be specified in Initial state list of the model
 {{{
 [InitialStateFiles]
@@ -31 +30 @@
             (${R_INIT}/SRF/${config_UserChoices_TagName}/soils_param.nc, .), \
             (${R_INIT}/SRF/${config_UserChoices_TagName}/cartepente2d_15min.nc, .), \
-            (${R_INIT}/SRF/${config_UserChoices_TagName}/floodplains.nc, .), \
-            (${R_INIT}/SRF/${config_UserChoices_TagName}/carteveg5km.nc, carteveg5km.nc)
+            (${R_INIT}/SRF/${config_UserChoices_TagName}/floodplains.nc, .)
 }}}
 
@@ -41 +39 @@
 }}}
 
-Although the sechiba.card has priority over the run.def a little consistency doesn't hurt so make sure that the run.def does NOT contain impose_veg=y, values for SECHIBA_VEG and values for SECHIBA_VEGMAX
+
+Because their is no initial state for the model it needs to be specified in the run.def. 
+
+For consistency reasons add to the rund.def
+{{{
+impose_veg=y
+}}}
+
+It is essential to specify 
+{{{
+SECHIBA_VEG__01 = x1
+...
+SECHIBA_VEG__nvm = xnvm
+}}}
+
+Where the sum of x1 to xnvm should equal 1
+
+
+Although some branches no longer make use of it, it is better to specify SECHIBA_VEGMAX as well. Just copy the values of SECHIBA_VEG to avoid problems
+