2010: from merge party to 3_3 release

Last edited Timestamp?

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

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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 https://forge.ipsl.jussieu.fr/nemo/svn/branches/nemo_v3_3_beta/NEMOGCM (read only)
svn+ssh://"your_login"@forge.ipsl.jussieu.fr/ipsl/forge/projets/nemo/svn/branches/nemo_v3_3_beta/NEMOGCM (read/write).

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List of tests done and results:

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

Description	Revision no	Configuration	Computer	Perf. memory	Perf. CPU	Restartability	Others

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List of problems, solutions…

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

Date	Revision no	Problem description	To be solved by:	State	Date	Version
with AGRIF			LOCEAN and LJK	Compilation now OK but not execution
new EVP rheology got lost during the merge			MERCATOR & LOCEAN	routines and namelist commited, some tests still ongoing??	27 Oct 2010	2320
Atmospheric pressure			MERCATOR & LOCEAN
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 file to be consistent with 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
Compilation errors to be fixed while using netcdf4			NOC	under test	9 November
Modifications on Griffies operator to be added			NOC

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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

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Schedule:

• 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)

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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
• 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 duplication of routines between on-line and offline use of TOP)
• "On the fly" interpolation tool 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)

Documentation

• 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 active 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 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

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