Changes between Version 280 and Version 281 of IPSLCM6/IPSL-CM6A-LR

Timestamp:

12/01/21 10:17:21 (2 years ago)

Author:

cpipsl

Comment:

--

IPSLCM6/IPSL-CM6A-LR

@@ -392 +392 @@
 === Procédure pour définir le choix de la downregulation du CO2 (ORCHIDEE) ===
 
+That section only concerns ORCHIDEE.
+
+In the directory from which you configure your simulation, you need to choose the parametrisation you wish (either p1 or p2).
+
+Most of the CMIP6 simulations have been performed using p1, but for these the GPP response to high CO2 concentration values (typically >700ppm) is not realistic (from a biogeochemical perspective).
+
+p1 or p2 is chosen as follows:
+{{{
+p1: DOWNREGULATION_CO2=y, DOWNREGULATION_CO2_BASELEVEL=380., (DOWNREGULATION_CO2_NEW=n)
+p2: DOWNREGULATION_CO2_NEW=y,  DOWNREGULATION_CO2_BASELEVEL=380., (DOWNREGULATION_CO2=n)
+}}}
+
+Practically that gives:
+* for p1
+{{{
+* in COMP/orchidee.card 
+set
+DOWNREGULATION_CO2=y
+* in PARAM/orchidee.def_CWRR 
+set
+DOWNREGULATION_CO2=y
+DOWNREGULATION_CO2_BASELEVEL=380.
+DOWNREGULATION_CO2_NEW=n
+}}}
+* for p2
+{{{
+* in COMP/orchidee.card 
+set
+DOWNREGULATION_CO2_NEW=y
+* in PARAM/orchidee.def_CWRR 
+DOWNREGULATION_CO2=n
+DOWNREGULATION_CO2_BASELEVEL=380.
+DOWNREGULATION_CO2_NEW=y
+}}}