Version 40 (modified by gm, 10 years ago) (diff)

2010: from merge party to 3_3 release

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This page is intended to facilitate the work of the next few weeks, i.e. between the merge party and the release of 3_3. Feel free to edit it to add your information, comments, suggestions….

19 October 2010: branch nemo_v3_3_beta created

After the merge party, the branch with all developments from the year has been built:
This beta version is available using :
svn co (read only)
svn+ssh://"your_login" (read/write).

List of tests done and results:

Add here test description (Branch nemo_v3_3_beta, Revision2298 (now) , configuration, computer, restartability, …)

DescriptionRevision noConfigurationComputerPerf. memoryPerf. CPURestartabilityOthers

List of problems, solutions…

Before releasing it to developer's for beta testing, the following weaknesses should be solved: (please update the information)

DateRevision noProblem descriptionTo be solved by:StateDateVersion
with AGRIFLOCEAN and LJKCompilation now OK but not execution
new EVP rheology got lost during the mergeMERCATOR & LOCEANroutines and namelist commited, some tests still ongoing??27 Oct 20102320
Atmospheric pressureMERCATOR & LOCEAN
Suppress TKE old optionLOCEANdone, ticket #74222 Oct 2010
add LibIGCM as externalLOCEANtbd
choose between key_mpp_rep1 and key_mpp_rep2, rename it key_mpp_rep and clean the codeLOCEANdone, ticket #74322 Oct 2010
add surface pressure forcingMERCATORtbd
correct input files, in ORCA2_LIM tar file, suppress duplicated files, rename chlorophyll file to be consistent with the namelist, add a sample of observation fileLOCEANtbd
bottom condition for GLS should be checkedMERCATORdone20 Oct 2010rev 2309 in zdfbfr.F90
execution fails after 2 time step using time splitting and VVLUKMO and LOCEANmodifications sent by LOCEAN and checked by UKMO
Compilation errors to be fixed while using netcdf4NOCfixed see #755 and #75410 November
Modifications on Griffies operator to be addedNOC
LIM-2: add fldread in ice damping at open boundaries (limdmp_2.F90)LOCEAN done see ticket #194 16 nov; 2010 changeset:2377
cross Land Advection update : full rewriting + MPP bug correctionLOCEAN done see ticket #127 16 nov; 2010 changeset:2392

Rules to follow:

  • all corrections to the developments done in 2010 should be made on the beta branch, not on the original branch
    - contributions to the documentation should be send directly to Gurvan, with Rachid on copy
    - between now and the end of the tag nemo_v3_2_2, correction of bugs has to be done on both the trunk and the beta branch when the bugs are in both versions


  • distribution to the developers at the beginning of November
    - tag a last stable version of nemo_v_3_2 (nemo_v3_2_2) at the end of December
    - put back the beta version on the trunk just after
    - tag and release of nemo_v3_3
    - delete the development branches for 2010 (if they went back to the new version of course)

Announcement of 3_3 to users (To be improved, in particular by adding the ticket number to find more details of the development)

Main features:

Scientific and numeric Developments

  • Lateral ocean physics: Griffies operator added - still under test, DO NOT USE
  • Vertical mixing scheme Generic Length Scale (GLS) added (ticket #687), old TKE option suppressed (ticket #742)
  • Changes in bottom boundary layer (bbl)
  • Develop mixed laplacian-bilaplacian diffusion. See ticket #659 and documentation in section 9.1 of the NEMO book.
  • Time stepping : modified Leap-Frog Asselin filter (MLF) implemented (Leclair and Madec Ocean Mod. 2009) (ticket #663)
  • LIM-2: the C-grid Elasto-Visco Plastic (EVP) rheology has been added in LIM2 (the oldest version of the sea-ice component)
  • LIM-2 & -3: ice-ocean momentum coupling at each ocean time step simplified and available on both version of LIM
  • LIM-3: correct a small bug in latent heat of solid precipitation melting (limthd.F90) (ticket#670 , changeset:2383) [Also done in consolidated v3.2 version, see changeset:2387]
  • LIM & CLIO bulk: correct the surface ice stress (sbcblk_clio.F90) (ticket #757 , changeset:2370) [Also done in consolidated v3.2 version, see changeset:2388]
  • OPA: correct an error in Qsr when using key_vvl (traqsr.F90) (ticket 726, done both in v3.3 and consolidated v3.2)
  • OPA: allow mixed laplacian/bilaplacian lateral diffusion on momentum (ticket #659)
  • Atmospheric pressure forcing added to both ocean and ice dynamics (ticket #725)
  • River runoffs: option to spread it over several ocean levels and specify both its temperature and salinity. See ticket #465, and documentation in section 7.7 of the NEMO book.
  • SBC: Diurnal cycle added when using daily solar radiation (ticket #730)
  • Coupling interface for WRF atmospheric model added
  • New module (OBS) to compare observations and model equivalent values. See ticket #681 and documentation in the NEMO book (section 11).
  • New data assimilation module (ASM) for applying of increments to the model. See ticket #681 and documentation in the NEMO book (section 12).
  • Linear-tangent and Adjoint component (TAM) added, phased on tag 3.0
  • Updates to BDY open boundaries for shelf configurations and implementation of seaice boundary conditions for LIM2. See ticket #718. Documentation now available in section 8.5 of the NEMO book.
  • OPA: remove 2 obsolescent diagnostics (diagap.F90 and diahdy.F90) (tickets #749 and #750)
  • OPA: rewriting + DOCTOR norme on diaptr.F90 (ticket #759)

Computing Developments

  • Performance improvements in parallel (MPI)
  • Reorganisation in tracers transport computation (merge of TRA and TRC modules) (ticket #693, #694 , #717)
  • Reorganisation of the initialisation phase (ticket #695)
  • Biogeochemistry offline (TOP) reorganised (avoid duplication of routines between on-line and offline use of TOP)
  • "On the fly" interpolation now modified in fldread.F90 to obtain information about the input grid from an attribute in the weights file (ticket #631)
  • "On the fly" interpolation tool added for input (forcing) files (ticket #631)
  • LIM-2: use of fldread in ice damping along open boundaries (limdmp_2.F90) (see ticket #194 and changeset:2377)
  • fldread: Read 3D files (like Levitus) with fldread.F90 (ticket #649 , #650), add a weekly forcing option (ticket #632 , #706), correct the time interpolation and co (#745, #751)
  • NetCDF-4: add NetCDF4 chunking and compression support to v3.3 (ticket #755 and #754)
  • Use of FCM (Flexible Configuration Manager) to build the chosen configuration, generate Makefile and run it to produce the executable)


  • Major updates in the reference manual, which is now almost in phase with the code (see tickets #458 #459 #658 …)
  • Smaller updates on the web pages documentation (but FAQ page more active from now on)
  • Detailed documentation and results of the reference configuration ORCA2_LIM forced by CORE II
  • CORE II normal year forcing set as the default forcing of ORCA2-LIM (ticket #756)

Major changes

  • In MPP, number of processors is now specified by cpp keys: -Dkey_nproci=2 -Dkey_nprocj=2 for instance'
  • use of FCM changes the directory hierarchy and the way to set up a configuration and create an executable