Changes between Version 8 and Version 9 of WorkingGroups/AGRIF

Timestamp:

2014-03-27T09:43:54+01:00 (10 years ago)

Author:

clevy

Comment:

--

WorkingGroups/AGRIF

@@ -1 @@
-[[TOC(heading=AGRIF,AGRIF/*, depth=1)]]
+[[PageOutline]]
+
+[[TOC(heading=AGRIF,AGRIF/*, depth=2)]]
 
 = '''AGRIF''' =
@@ -58 +60 @@
 
 == REPORT OF THE WORKING GROUP MEETING (January 30, 2014) ==
-Participants : Rachid Benshila, Daley Calvert, Julien Calandreau, Jérome Chanut, Laurent Debreu, Christian Ethe, Rachel Furner, Claire Levy, Gurvan Madec, Sébastien Masson
-
- 
+Participants : Rachid Benshila, Daley Calvert, Julien Calandreau, Jérome Chanut, Laurent Debreu, Christian Ethe, Rachel Furner, Claire Levy, Gurvan Madec, Sébastien Masson
 
 1) Discuss the update of the 3.6 version
 
- 
-
-History :
-
--       AGRIF version (and corresponding NEMO subroutines) has been updated by Julien Calandreau (INRIA) and Laurent
-
--       Jérome has made a lot of improvements and bug fixes in his Gilbraltar Strait configuration
-
--       Same for Sébastien in the Pulsation ANR project
-
--       Other developments in LIM, PISCES
-
- 
-
-Bugs that have been identified and corrected since version 3.4 :
-
--       zwork array (J. Chanut): a global array  « zwork » was defined in the libmpp module and (due to a bug in the AGRIF converter) this led to several problems and in particular the update step was not performed …
-
--       Diffusion coefficients in the corners of the sponge layern were wrong (J. Chanut)
-
--       Scale factors were not correctly computed in the ghost cells (where it is assumed that we are in full steps) (J. Chanut)
+History :
+
+ * AGRIF version (and corresponding NEMO subroutines) has been updated by Julien Calandreau (INRIA) and Laurent
+
+ * Jérome has made a lot of improvements and bug fixes in his Gilbraltar Strait configuration
+
+ * Same for Sébastien in the Pulsation ANR project
+
+ * Other developments in LIM, PISCES
+
+Bugs that have been identified and corrected since version 3.4 :
+
+ * zwork array (J. Chanut): a global array  « zwork » was defined in the libmpp module and (due to a bug in the AGRIF converter) this led to several problems and in particular the update step was not performed …
+
+ * Diffusion coefficients in the corners of the sponge layern were wrong (J. Chanut)
+
+ * Scale factors were not correctly computed in the ghost cells (where it is assumed that we are in full steps) (J. Chanut)
 
 è same problem for OBC
 
--       TKE (S. Masson): near the boundaries, spatial averaging operations led to wrong Kz in the first cell inside the high resolution domain. Extrapolation is possible but does not fulfill the requirement that with, a mesh refinement factor of 1, the obtained solution of the HR grid is identical to a solution computed without a zoom. S. Masson has implemented exchanges of TKE between coarse and fine grids.
+ * TKE (S. Masson): near the boundaries, spatial averaging operations led to wrong Kz in the first cell inside the high resolution domain. Extrapolation is possible but does not fulfill the requirement that with, a mesh refinement factor of 1, the obtained solution of the HR grid is identical to a solution computed without a zoom. S. Masson has implemented exchanges of TKE between coarse and fine grids.
 
 è Same problem for GLS and for OBC
 
--       Asselin Filter (J. Chanut) : when updating the « after » (n+1) fields, the corresponding corrections of the « now » fields linked with the Asselin filter were not done.
-
--       arrays out of bound in procnames in MPI (wrong declarations of AGRIF profiles in agrif_declare_variables: jpi, jpj have been replaced by ncli,nlcj)
-
- 
-
-Bugs  / Problems that have been identified
-
-·      The bathymetry connection check is not complete (add a check that the coarse grid bathy have been correctly updated)
-
-·      Reproducibility is not guaranteed (due to MPI problem) when ln_spc_dyn is set to true in namelist (which means that we take 0 as special value for dynamics in interpolations/updates).
-
-·      Recursive updates. When more than 1 zoom level are set, the update should start from the highest resolution grid and go recursively to the root grid. Laurent implemented changes that makes this possible.
-
- 
-
-- Use of AGRIF for degradation online (problème de north pole, coarsening)
-
-- Average operators with update values
-
-- High order operators with coastlines
-
- 
-
-- BDY problem have been solved
-
- 
+ * Asselin Filter (J. Chanut) : when updating the « after » (n+1) fields, the corresponding corrections of the « now » fields linked with the Asselin filter were not done.
+
+ * arrays out of bound in procnames in MPI (wrong declarations of AGRIF profiles in agrif_declare_variables: jpi, jpj have been replaced by ncli,nlcj)
+
+Bugs  / Problems that have been identified
+
+·      The bathymetry connection check is not complete (add a check that the coarse grid bathy have been correctly updated)
+
+·      Reproducibility is not guaranteed (due to MPI problem) when ln_spc_dyn is set to true in namelist (which means that we take 0 as special value for dynamics in interpolations/updates).
+
+·      Recursive updates. When more than 1 zoom level are set, the update should start from the highest resolution grid and go recursively to the root grid. Laurent implemented changes that makes this possible.
+
+ * Use of AGRIF for degradation online (problème de north pole, coarsening)
+
+ * Average operators with update values
+
+ * High order operators with coastlines
+
+ * BDY problem have been solved
 
 Rachid is ready do the merge (as soon the beta version is fixed)
 
- 
-
 2) What are the known problems / bugs?
 
- 
-
--       Number of ghost cells
-
-o   Antartic problem (periodicity): require only one ghost cell instead of 2
-
-o   Number of required ghost cells for high order advection schemes may be larger than 2
-
-o   -> Remove hardcoding of the number of ghost cells, do the required modifications to the AGRIF “profiles”  (Laurent)
-
--       North fold problem ?
-
--       Timings for each grid
-
- 
+ * Number of ghost cells
+
+o   Antartic problem (periodicity): require only one ghost cell instead of 2
+
+o   Number of required ghost cells for high order advection schemes may be larger than 2
+
+o   -> Remove hardcoding of the number of ghost cells, do the required modifications to the AGRIF “profiles”  (Laurent)
+
+ * North fold problem ?
+
+ * Timings for each grid
 
 3) What are the main next developments?
 
- 
-
--       Time splitting (OK for version 3.6, end of the year, Jérome)
-
-o   only consider forward integration of the forcing mode permits to ensure volume conservation
-
-o   (refluxing or conservative interpolation at the boundary).
-
-o   Tells the users that we have only AGRIF working in time splitting version in the forward version of the code.
-
--       Parallel runs (Laurent)
-
--       Update of the parent grid rhs before barotropic step(s)
-
- 
+ * Time splitting (OK for version 3.6, end of the year, Jérome)
+
+o   only consider forward integration of the forcing mode permits to ensure volume conservation
+
+o   (refluxing or conservative interpolation at the boundary).
+
+o   Tells the users that we have only AGRIF working in time splitting version in the forward version of the code.
+
+ * Parallel runs (Laurent)
+
+ * Update of the parent grid rhs before barotropic step(s)
 
 4) Version 5.0 (time and space schemes in the system).
 
- 
-
- 
-
--       Vertical grid refinement (Laurent)
-
-o   Probably before version 5
-
--       Online degradation using AGRIF
-
--       Agrif with variable volume
-
-o   (update of the volume, and modification of boundary conditions) (Jérome).
-
- 
+ * Vertical grid refinement (Laurent)
+
+o   Probably before version 5
+
+ * Online degradation using AGRIF
+
+ * Agrif with variable volume
+
+o   (update of the volume, and modification of boundary conditions) (Jérome).
 
 5) Nesting tools:
 
- 
-
-Two stages: 
-
-a) for 3.6 version  
-
--       agree on all the points: bathymetry smoothing, update of coarse grids (take the maximum as default)
-
--       Incorporate corrections done by Jean Marc
-
--       The nesting tools are only essential for the creation of bathymetry:
-
-o   Do a list available tools for 2D/3D interpolation
-
-o   For 3.6 keep the 3D fields interpolation in nesting tools
-
- 
+Two stages:
+
+a) for 3.6 version
+
+ * agree on all the points: bathymetry smoothing, update of coarse grids (take the maximum as default)
+
+ * Incorporate corrections done by Jean Marc
+
+ * The nesting tools are only essential for the creation of bathymetry:
+
+o   Do a list available tools for 2D/3D interpolation
+
+o   For 3.6 keep the 3D fields interpolation in nesting tools
 
 b) next version
 
- 
-
--       The definition of vertical coordinates should be done outside NEMO
-
--       Nesting tools for the s coordinates
-
- 
+ * The definition of vertical coordinates should be done outside NEMO
+
+ * Nesting tools for the s coordinates
 
 5) Documentation:
 
--       Update of the nesting tools 3.6 documentation
-
--       Update of the users guide: describes what is possible or not with AGRIF.
-
--       Documentation for nesting in NEMO/AGRIF: starts from the notes of Sebastien, then circulate the powerpoint
-
--       GMD paper
-
- 
+ * Update of the nesting tools 3.6 documentation
+
+ * Update of the users guide: describes what is possible or not with AGRIF.
+
+ * Documentation for nesting in NEMO/AGRIF: starts from the notes of Sebastien, then circulate the powerpoint
+
+ * GMD paper
 
 6) Standard configuration and sanity tests
 
- 
-
 The standard configuration should:
 
--       Include more than one level of embedding (test of the recursive update starting from the finer resolution grid(s))
-
--       Uses time splitting
-
--       Include a zoom in a sea ice area (Labrador Sea, LIM3)
-
--       Include a zoom with PISCES
-
--       Zoom in Perou Chili
-
- 
+ * Include more than one level of embedding (test of the recursive update starting from the finer resolution grid(s))
+
+ * Uses time splitting
+
+ * Include a zoom in a sea ice area (Labrador Sea, LIM3)
+
+ * Include a zoom with PISCES
+
+ * Zoom in Perou Chili
 
 Sanitiy tests
 
--       Zoom with a mesh refinement of 1
-
--       Test constancy preservation for tracers
-
- 
+ * Zoom with a mesh refinement of 1
+
+ * Test constancy preservation for tracers
 
 Longer visions of having AGRIF zoom in AMM