Version 26 (modified by clevy, 10 years ago) (diff)

2010: from merge party to 3_3 release

Last edited Timestamp?

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

19 october 2010: branch nemo_v3_3_beta created

After the merge party, the branch with all developments of the year is build:
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 developper's for beta testing, the following weaknesses should be solved: (please update the informations)

DateRevision noProblem descriptionTo be solved by:State DateVersion
with AGRIF LOCEAN and LJK Compilation now OK but not execution
new EVP rheology got lost during the merge MERCATOR routines and namelist commited 27 Oct 2010 2320
Suppress TKE old option LOCEAN done, ticket #742 22 Oct 2010
add LibIGCM as external LOCEAN tbd
choose between key_mpp_rep1 and key_mpp_rep2, rename it key_mpp_rep and clean the code LOCEAN done, ticket #743 22 Oct 2010
add surface pressure forcing MERCATOR tbd
correct input files, in ORCA2_LIM tar file, suppress duplicated files, rename chlorophyll one to fit the namelist, add a sample of observation file LOCEAN tbd
bottom condition for GLS should be checked MERCATOR done 20 Oct 2010 rev 2309 in zdfbfr.F90
execution fails after 2 time step using time splitting and VVL UKMO and LOCEAN modifications sent by LOCEAN and checked by UKMO

Rules to follow:

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


  • diffusion to the developers at the beginning of november
    - tag a last version stable 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 nemo_v3_3
    - delete the developments branches for 2010 (if they went back to the new version off course)

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

Main features:

Scientific and numeric Developments

  • Lateral ocean physics: Griffies operator added
  • Vertical mixing scheme Generic Length Scale (GLS) added
  • Changes in bottom boundary layer (bbl)
  • Develop mixed laplacian-bilaplacian diffusion
  • Time stepping : modified Leap-Frog Asselin filter (MLF) implemented
  • Sea-ice: the Elasto-Visco Plastic (EVP) rheology has been added in LIM2 (the oldest version of the sea-ice component)
  • Atmospheric pressure forcing added
  • Change formulation of the fluxes between ocean, ice and atmosphere : an exchange of water (mass exchange) is now explicitly associated with an exchange of heat and salt content.
  • New implementation of river runoffs
  • Diurnal cycle added
  • Coupling interface for WRF atmospheric model added
  • Development of data assimilation modules OBS and ASM
  • Linear-tangent and Adjoint component (TAM) added, phased on tag 3.0

Computing Developments

  • Performance improvements in parallel (MPI)
  • Reorganisation in tracers transport computation (merge of TRA and TRC modules)
  • Biogeochemistry offline (TOP) reorganised (avoid routines dupplication between on-line and offline use of TOP)
  • "On the fly" interpolation added for input (forcing) files
  • 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 more in phase with the code
  • Smaller updates on the web pages documentation (but FAQ page more actie from now on)
  • Detailed documentation and results of the reference configuration ORCA2_LIM forced by CORE II

Major changes

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