nemo_v3_3_beta

The beta release nemo_v3_3_beta is now available for the developers who would like to try it. This testing phase will last for one month, before the official release of nemo_v3_3, by the end of december 2010.

All comments, feedbacks should be sent to the NEMO System Team.

How to use nemo_v3_3_beta:
This beta release ids available on a branch of the Subversion repository, and may be evolving until the nemo_V3_3 release. All informations, including last changes, are available on the Developers wiki pages , information on environment should be find here.

Main new features available in the nemo_v3_3 release:

Scientific and numeric Developments

• Lateral ocean physics: Griffies operator added - (ticket #680, and appendix in reference manual)
• Vertical mixing scheme Generic Length Scale (GLS) added (ticket #687), old TKE option suppressed (ticket #742)
• Changes in bottom boundary layer (bbl) (ticket #774)
• 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) ticket #704
• 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]
• 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.
• 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 in both v3.3 and consolidated v3.2)
• OPA: correct an error in the slope just below the mixed layer + optimization (ldfslp.F90) (ticket #435 , changetset: 2401, done in both v3.3 and consolidated v3.2)

Computing Developments

• Performance improvements and reproducibility in parallel (MPI) ticket #677 and #679
• 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)
• OPA: remove 2 obsolescent diagnostics (diagap.F90 and diahdy.F90) (tickets #749 and #750)
• OPA: rewriting + DOCTOR norme on diaptr.F90 (ticket #759 , changeset:2399)
• 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)

Documentation

• 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)