Changes between Version 2 and Version 3 of model_comparison

Timestamp:

07/26/19 16:37:32 (4 years ago)

Author:

snguyen

Comment:

--

model_comparison

@@ -3 +3 @@
 == Algorithm ==
 
+It would be possible to implement different parameterizations and compute them at the same time.
+
+Roughly the algorithm would be:
+
+* storage of the state
+
+* Beginning of loop
+
+  * if different from first loop : restore the state
+ 
+  * if loop n compute nth model tendencies (the last model must be the model used for actual time stepping)
+
+  * output the nth model variables values to file
+
+* end of loop
+
+The storing and restoring is already implemented in the Schwarz loop.
+Clearly the Schwarz loop can be modified to do this.
+
+There are several problems in the case of coupling !
+
+You will need to store the fields sent and received instead of going through OASIS for exchanging between ocean and atmosphere.
+
+If you have several physical time steps during a Schwarz window you will compute a different trajectory for each parameterization instead of a single point.
+
+In the case of forced LMDZ you can set the Schwarz loop to be for a single physical time step.
+
+Another solution is to store the ocean forcing of a reference coupling simulation and use this to run a forced LMDZ run.
+
 == modification of OASIS communications ==
 
+It would be needed to implement variables to store and restore the coupling instead of sending and receiving through OASIS
+
 == XIOS modifications ==
+
+It would be needed to implement XIOS calls to write the values for the different models in a single file.
+A temporal filter to append all the values at each loop repetition could be used.