Changes between Version 4 and Version 5 of ticket/0846

Timestamp:

2011-07-20T16:38:55+02:00 (13 years ago)

Author:

vichi

Comment:

--

ticket/0846

@@ -58 +58 @@
 I think we can work out a common solution within the framework of my_trc, although I would propose to have an extended my_trc that allows more flexibility. Whether to achieve this through additional logical flags or by means of macros is a matter of discussion. I guess we all agree that it makes no sense to have a different key for each new model, though we also need to realize that we'll have to accommodate two different coupling strategies, one for SMS models and one for "ecosystem" models (which may also incorporate benthic systems like the ones we use now).
 
-One (very) simple solution is to have only an additional key to accommodate any BGC model that does not use at all the NEMO memory structure and facilities.
+One (very) simple solution is to have only an additional key (like key_obgcm, other biogeochemical model) to accommodate any BGC model that does not use at all the NEMO memory structure and facilities.
 This would only involve two changes in the NEMO code, during the initialization step and during the time stepping
 
-TO BE COMPLETED
+{{{
+nemogcm.F90:
+-------------
+#if defined key_top
+  #if defined key_obgcm
+      !                                     ! Other external biogeochemical model
+                            CALL     trc_init_obgc
+  #else
+      !                                     ! Passive tracers
+                            CALL     trc_init
+  #endif
+#endif
+
+step.F90:
+---------
+#if defined key_top
+  #if defined key_obgcm
+      !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+      ! Passive Tracer Model
+      !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+                         CALL trc_stp_obgc( kstp )         ! time-stepping
+#else
+      !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+      ! Other Biogeochemical Model
+      !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+                         CALL trc_stp( kstp )         ! time-stepping
+  #endif
+#endif
+
+}}}
+
+The routines trc_init_obgc and trc_stp_obgc are wrappers that have to be provided by the external model in its own directory structure and linked during compilation. We can also put an EXTERNAL statement in the code to clarify this.
+
 
 The strategy is open for discussion because it is not urgent matter in the 2011 work plan, but it is important that we find a common way forward that will maximize all development efforts and the research carried on by the community of ecosystem modelling.