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NEMO/branches/2018/dev_r10164_HPC09_ESIWACE_PREP_MERGE/RELEASE_NOTES.rst
r10150 r10345 1 ================ 2 NEMO 4.0 Release 3 ================ 1 ********************** 2 What's new in NEMO 4.0 3 ********************** 4 4 5 5 .. contents:: 6 7 ---------- 8 What's new 9 ---------- 10 6 :local: 7 11 8 Original sea-ice component SI\ :sup:`3`\ 12 9 ======================================== … … 50 47 Define and install a separate repository for test cases to all easy contributions from the NEMO Users Community 51 48 52 +-------------------+--------------------------------------------------------+------------------------------------+53 | Name | Purpose | References |54 +===================+=================+======================================+====================================+55 | ``CANAL`` | East-west periodic canal of variable size with several | |56 | | initial states and associated geostrophic currents | |57 | | (zonal jets or vortex). | |58 +-------------------+--------------------------------------------------------+------------------------------------+59 | ``ICEDYN`` | East-west + north-south periodic channel. | |60 | | The common configuration includes an AGRIF zoom (1:3) | |61 | | in the middle of the basin to test how an ice patch is | |62 | | advected through it but one can also test the | |63 | | advection schemes (Prather and Ultimate-Macho) by | |64 | | removing the ``key_agrif`` in the CPP keys. | |65 +-------------------+--------------------------------------------------------+------------------------------------+66 | ``ISOMIP`` | Simple box configuration with an iceshelf with simple | `Hunter 2006`_ |67 | | geometry on top. | |68 | | The purpose of this test case is to evaluate the | |69 | | impact of various schemes and new development with | |70 | | iceshelf cavities. | |71 +-------------------+--------------------------------------------------------+------------------------------------+72 | ``LOCK_EXCHANGE`` | Classical fluid dynamics experiment that has been | - `Haidvogel and Beckmann 1999`_ |73 | | adapted for testing advection schemes in ocean | - `Burchard and Bolding 2002`_ |74 | | circulation models. | - `Ilıcak 2012`_ |75 | | This experiment can in particular illustrate the | |76 | | impact of different choices of numerical schemes | |77 | | and/or subgrid closures on spurious interior mixing. | |78 +-------------------+--------------------------------------------------------+------------------------------------+79 | ``OVERFLOW`` | Adapted from the non-rotating overflow configuration | - `Haidvogel and Beckmann 1999`_ |80 | | Illustrates the impact of different choices of | - `Ilıcak 2012`_ |81 | | numerical schemes and/or subgrid closures on spurious | |82 | | interior mixing close to bottom topography. | |83 +-------------------+--------------------------------------------------------+------------------------------------+84 | ``VORTEX`` | Illustrates the propagation of an anticyclonic eddy | - `Debreu 2012`_ |85 | | over a Beta plan and flat bottom. | - `Penven 2006`_ |86 | | It is implemented here with an online refined | - `Spall and Holland 1991`_ |87 | | subdomain (thanks to AGRIF library) out of which the | |88 | | vortex propagates and serves as a benchmark to | |89 | | diagnose nesting errors. | |90 +-------------------+--------------------------------------------------------+------------------------------------+91 | ``WAD`` | Set of simple closed basin geometries for testing the | |92 | | wetting and drying capabilities. | |93 | | Examples range from a closed channel with EW linear | |94 | | bottom slope to a parabolic EW channel with a Gaussian | |95 | | ridge. | |96 +-------------------+--------------------------------------------------------+------------------------------------+97 98 -----------99 Improvments100 -----------101 102 49 Core components 103 50 =============== … … 108 55 - The passive tracers transport component was redesigned toward a modular structure and 109 56 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_)57 - TOP on-line user documentation is available on NEMO Trac platform (`TOP User Quick Guide`_) 111 58 - TOP currently accounts for the following 5 modules: 112 59 … … 130 77 AGRIF (embedded zooms) 131 78 ---------------------- 79 80 The NEMO 4.0 includes new capabilities, configurations and test cases with AGRIF: 81 82 .. role:: underline 83 :class: underline 84 85 :underline:`New capabilities from NEMO 3.6 to NEMO 4.0` 86 87 AGRIF is continuously maintained so that it could be activated with all NEMO components (OPA, sea-ice, TOP). 88 Depending on NEMO version, it is nevertheless not the case so that some options may not be compatible with 89 the use of online grid refinement. 90 Check out the table below to know the status according to the NEMO release you may use. 91 92 :underline:`Status of available options with AGRIF (if not listed, option is compatible with AGRIF)`: 93 94 +--------------------------------------------------------+----------------+---------------------+ 95 | | NEMO 3.6 | NEMO 4.0 | 96 +========================================================+================+=====================+ 97 | LIM2 | yes | ``-`` | 98 +--------------------------------------------------------+----------------+---------------------+ 99 | LIM3/SI3 | no | yes | 100 +--------------------------------------------------------+----------------+---------------------+ 101 | TOP | yes | yes | 102 +--------------------------------------------------------+----------------+---------------------+ 103 | GLS vertical mixing | no | yes | 104 +--------------------------------------------------------+----------------+---------------------+ 105 | z* | no | yes | 106 +--------------------------------------------------------+----------------+---------------------+ 107 | z~ | no | no | 108 +--------------------------------------------------------+----------------+---------------------+ 109 | Lagrangian icebergs | no | no | 110 +--------------------------------------------------------+----------------+---------------------+ 111 | East-west periodic and/or north fold bcs in zooms | no | no | 112 +--------------------------------------------------------+----------------+---------------------+ 113 | Online timing | no | no | 114 +--------------------------------------------------------+----------------+---------------------+ 115 | Stochastic parameterization | no | no | 116 +--------------------------------------------------------+----------------+---------------------+ 117 | Vertical coordinate change in zooms (``key_vertical``) | no | yes, but not tested | 118 +--------------------------------------------------------+----------------+---------------------+ 119 | Number of ghost cells | 1 (hard coded) | 3 (parameter) | 120 +--------------------------------------------------------+----------------+---------------------+ 121 122 [Important notice concerning the change of ghost cells number] 123 124 The default number of ghost cells (i.e. the number of cells that serve as open boundary data provision) has been 125 increased from 1 to 3 in NEMO 4.0. 126 This allows to properly handle boundary conditions for numerical schemes that 127 have a discretization order greater than 2. 128 On the user point of view this does not change anything++ except in the definition of level 1 grids in 129 the ``AGRIF_FixedGrids.in`` file. 130 In order to retrieve exactly the position of a nested grid in NEMO 4.0 one has to shift indices by 131 2 points to the south-west. 132 Taking the ``ICEDYN`` example above for NEMO 4.0, the "old" NEMO 3.6 corresponding file would contain:: 133 134 1 135 36 65 36 65 3 3 3 136 0 137 138 ++ Child grid output files are now greater by 4 points in each direction. 132 139 133 140 - Now compatible with new sea ice component and z* coordinate … … 159 166 - Wave coupling: large scale wave interaction process added in momentum and tracer equations 160 167 - Remove the acceleration of convergence 161 168 162 169 Numerics 163 170 -------- … … 197 204 198 205 .. _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-UserQuickGuide200 201 .. _Hunter 2006: http://staff.acecrc.org.au/~bkgalton/ISOMIP/test_cavities.pdf206 .. _TOP User Quick Guide: http://forge.ipsl.jussieu.fr/nemo/wiki/WorkingGroups/top-dg/TOP-UserQuickGuide 207 208 .. The following references should be in the manual bibliographies and referenced via 'bibliography' directive 202 209 .. _Brodeau 2017: http://doi.org/10.1175/JPO-D-16-0169.1 203 .. _Haidvogel and Beckmann 1999: http://hdl.handle.net/10013/epic.11761204 .. _Burchard and Bolding 2002: http://www.researchgate.net/publication/258128069_GETM_A_General_Estuarine_Transport_Model_Scientific_Documentation205 .. _Ilıcak 2012: http://doi.org/10.1016/j.ocemod.2011.10.003206 .. _Debreu 2012: http://doi.org/10.1016/j.ocemod.2012.03.003207 .. _Penven 2006: http://doi.org/10.1016/j.ocemod.2005.05.002208 .. _Spall and Holland 1991: http://www.researchgate.net/publication/232101325_A_Nested_Primitive_Equation_Model_for_Oceanic_Applications209 210 .. _Holland 2012: http://doi.org/10.1175/JCLI-D-11-00078.1 210 211 .. _Lupkes 2012: http://doi.org/10.1029/2012JD017630
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