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2018-10-09T19:08:59+02:00 (2 years ago)
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nicolasmartin
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  • NEMO/trunk/RELEASE_NOTES.rst

    r10150 r10187  
    1 ================ 
    2 NEMO 4.0 Release 
    3 ================ 
     1====================== 
     2What's new in NEMO 4.0 
     3====================== 
    44 
    55.. contents:: 
    6  
    7 ---------- 
    8 What's new 
    9 ---------- 
    10  
     6   :local: 
     7       
    118Original sea-ice component SI\ :sup:`3`\ 
    129======================================== 
     
    108105- The passive tracers transport component was redesigned toward a modular structure and 
    109106  users can enable each module directly through logical flags in namelist_top (no more Fortran macros!). 
    110 - TOP on-line user documentation is available on NEMO Trac platform (TOP-UserQuickGuide_) 
     107- TOP on-line user documentation is available on NEMO Trac platform (`TOP User Quick Guide`_) 
    111108- TOP currently accounts for the following 5 modules: 
    112109 
     
    130127AGRIF (embedded zooms) 
    131128---------------------- 
     129 
     130The NEMO 4.0 includes new capabilities, configurations and test cases with AGRIF: 
     131 
     132.. role:: underline 
     133   :class: underline 
     134 
     135:underline:`New capabilities from NEMO 3.6 to NEMO 4.0` 
     136 
     137AGRIF is continuously maintained so that it could be activated with all NEMO components (OPA, sea-ice, TOP). 
     138Depending on NEMO version, it is nevertheless not the case so that some options may not be compatible with 
     139the use of online grid refinement. 
     140Check out the table below to know the status according to the NEMO release you may use. 
     141 
     142:underline:`Status of available options with AGRIF (if not listed, option is compatible with AGRIF)`: 
     143 
     144+--------------------------------------------------------+----------------+---------------------+ 
     145|                                                        | NEMO 3.6       | NEMO 4.0            | 
     146+========================================================+================+=====================+ 
     147| LIM2                                                   | yes            | ``-``               | 
     148+--------------------------------------------------------+----------------+---------------------+ 
     149| LIM3/SI3                                               | no             | yes                 | 
     150+--------------------------------------------------------+----------------+---------------------+ 
     151| TOP                                                    | yes            | yes                 | 
     152+--------------------------------------------------------+----------------+---------------------+ 
     153| GLS vertical mixing                                    | no             | yes                 | 
     154+--------------------------------------------------------+----------------+---------------------+ 
     155| z*                                                     | no             | yes                 | 
     156+--------------------------------------------------------+----------------+---------------------+ 
     157| z~                                                     | no             | no                  | 
     158+--------------------------------------------------------+----------------+---------------------+ 
     159| Lagrangian icebergs                                    | no             | no                  | 
     160+--------------------------------------------------------+----------------+---------------------+ 
     161| East-west periodic and/or north fold bcs in zooms      | no             | no                  | 
     162+--------------------------------------------------------+----------------+---------------------+ 
     163| Online timing                                          | no             | no                  | 
     164+--------------------------------------------------------+----------------+---------------------+ 
     165| Stochastic parameterization                            | no             | no                  | 
     166+--------------------------------------------------------+----------------+---------------------+ 
     167| Vertical coordinate change in zooms (``key_vertical``) | no             | yes, but not tested | 
     168+--------------------------------------------------------+----------------+---------------------+ 
     169| Number of ghost cells                                  | 1 (hard coded) | 3 (parameter)       | 
     170+--------------------------------------------------------+----------------+---------------------+ 
     171 
     172[Important notice concerning the change of ghost cells number] 
     173 
     174The default number of ghost cells (i.e. the number of cells that serve as open boundary data provision) has been 
     175increased from 1 to 3 in NEMO 4.0. 
     176This allows to properly handle boundary conditions for numerical schemes that 
     177have a discretization order greater than 2. 
     178On the user point of view this does not change anything++ except in the definition of level 1 grids in 
     179the ``AGRIF_FixedGrids.in`` file. 
     180In order to retrieve exactly the position of a nested grid in NEMO 4.0 one has to shift indices by 
     1812 points to the south-west. 
     182Taking the ``ICEDYN`` example above for NEMO 4.0, the "old" NEMO 3.6 corresponding file would contain:: 
     183 
     184   1 
     185   36 65 36 65 3 3 3 
     186   0 
     187 
     188++ Child grid output files are now greater by 4 points in each direction. 
    132189 
    133190- Now compatible with new sea ice component and z* coordinate 
     
    159216- Wave coupling: large scale wave interaction process added in momentum and tracer equations 
    160217- Remove the acceleration of convergence 
    161    
     218 
    162219Numerics 
    163220-------- 
     
    197254 
    198255.. _sea ice working group:       http://forge.ipsl.jussieu.fr/nemo/wiki/WorkingGroups/SI3 
    199 .. _TOP-UserQuickGuide:          http://forge.ipsl.jussieu.fr/nemo/wiki/WorkingGroups/top-dg/TOP-UserQuickGuide 
     256.. _TOP User Quick Guide:        http://forge.ipsl.jussieu.fr/nemo/wiki/WorkingGroups/top-dg/TOP-UserQuickGuide 
    200257 
    201258.. _Hunter 2006:                 http://staff.acecrc.org.au/~bkgalton/ISOMIP/test_cavities.pdf 
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