Changes between Version 2 and Version 3 of WorkingGroups/TAM/ReferenceManual/directmodel

Timestamp:

2010-02-19T11:30:54+01:00 (14 years ago)

Author:

vigilant

Comment:

--

WorkingGroups/TAM/ReferenceManual/directmodel

@@ -14 +14 @@
 
 == 1 - Non-Linear Trajectory ==
-To evaluate the tangent and/or the adjoint at a time t, some actual parameters of the direct model are needed at the corresponding time t. To fulfill this purpose a subroutine, ''asm_trj_wri''  is added to write the trajectory. It is controlled with two logical parameters: ''lk_asminc'' and ''ln_trjwri''. The trajectory is saved with a certain saving frequency and only both logical parameter are set to TRUE.
+To evaluate the tangent and/or the adjoint at a time t, some actual parameters of the direct model are needed at the corresponding time t. To fulfill this purpose a subroutine, ''tamtrj_wri''  is added to write the trajectory. It is controlled with one logical parameter: ''ln_trjwri''. The trajectory is saved upon a given frequency "nittrjfrq" only if the logical parameter is set to TRUE.
 
-=== Subroutine: asm_trj_wri ===
-A new subdirectory is created into /OPA/ named '''ASM'''. The file is '''asmtrj.F90'''.
-The purpose of this routine is to write to file the model state trajectory for use with 4DVar. It is called in ''opa_model'' routine to save the initial state needed for the TAM and at the end of the ''stp'' routine.
+=== Subroutine: tam_trj_wri ===
+A new subdirectory is created into /OPA/ named '''TAM'''. The file is '''tamtrj.F90'''.
+The purpose of this routine is to write to file the model state trajectory for use with 4DVar. It is called in ''opa_model'' routine to initialize tamtrj routine TAM and at in the ''stp'' routine. 
 
 Currently the following parameters are saved:
@@ -45 +45 @@
 ||hmlp || key_tradmp ||
 
-''note: is it worth to add why (and where) there will be a need of these variables later in TAM?''
+==== Specific management of the initial state ====
+For the initial state of the model, we call the tam_trj_wri in 'step' routine just before the tracer block. We,then, have access to some parameters (tke and sbc for instance) as they are not yet computed in opa (outside 'step').
 
-==== Specific management of the initial state ====
-For the initial state of the model, some parameters need to be computed in ''asmtrj'' as they are not yet computed in opa.
-
-''note: we still have zero value in emp/emps parameters. It needs to be solved quickly.''  
 
 ==== Linear Interpollation ====
-For efficiency matters, the whole trajectory is of course not saved. Only a predefined steptime frequency is saved. The frequency ''nittrjfreq'' is controlled by namelist. The intermediate steptime will be estimated in TAM by linear interpollation.
+For efficiency matters, the whole trajectory is of course not saved. Only a predefined steptime frequency is saved. The frequency ''nittrjfrq'' is controlled by namelist. The intermediate steptime will be estimated in TAM by linear interpollation.
 
 ==== Namelist ====
-Parameters related to the model state saving is controlled by the namelist '''nam_asminc''' with:
+Parameters related to the model state saving is controlled by the namelist '''namtam''' with:
 
  * ln_trjwri: Logical switch for writing out state trajectory
- * nittrjfrq: frequency of the trajectory used in 4D-VAR
+ * nittrjfrq: saving frequency of the trajectory
 
 == 2 - Routine modification ==
 
  * '''opa.F90''': 
-   * include output trajectory fields (USE asmtrj and CALL asm_trj_wri)
+   * include initilialization of trajectory saving handling (USE tamtrj)
  * '''step.F90''':
-   * include output trajectory fields (CALL asm_trj_wri)
-   * add temporary variables to save ta/sa (used as workspace in standard)
+   * include calls for trajectory saving (CALL tam_trj_wri)
+   * add temporary variables (zta, zsa) to save ta/sa (used as workspace in dynamic block)
 
 == 3 - Declaration Changes ==