Changes between Version 12 and Version 13 of Changelog


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Timestamp:
2019-01-25T16:44:35+01:00 (15 months ago)
Author:
clevy
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  • Changelog

    v12 v13  
    2222        tidal mixing parametrisation (bottom intensification) + Indonesian specific tidal mixing [Koch-Larrouy et al. 2007] ; 
    2323}}} 
     24 
     25== 2019 v4.0 
     26 
     27 
     28     * ''' New sea-ice component SI3 (in place of LIMx) 
     29         * Improvements in physics 
     30            * Lateral melting 
     31            * Melt ponds: constant or Holland et al. 2012 formulation (and soon topographic melt ponds) 
     32            * Ice-atm. drags from Lupkes et al. 2012 (depending on ice concentration) or Lupkes et al. 2015 (depending on sea ice concentration and atm. stability)  
     33            * Landfast ice (Lemieux et al. 2016) 
     34         * Improvements in numerics 
     35            * Advection: Ultimate-Macho scheme 
     36            * Rheology: adaptive EVP (Kimmritz et al. 2017) 
     37            * Coupling interface: conductivity as surface forcing instead of heat fluxes (Met-Office requirement) 
     38         * Improvements in performance 
     39            * All thermodynamics in 1D 
     40            * Reduced mpp communications 
     41         * Users & developers friendly 
     42            * Comprehensive set of outputs (universal units and understandable names + includes cmip) 
     43            * New architecture and namelist 
     44            * All processes can be decoupled from each other (switch on/off) 
     45            * Ice categories bounds can be defined by the user or set automatically 
     46            * For open boundaries, the number of ice categories from the forcing model can be different from the number of categories in the regional simulation 
     47            * Fully compatible with AGRIF 
     48            * Revised documentation 
     49 
     50     * '''AGRIF for embedded zooms: 
     51         * Now compatible with new sea ice component 
     52         * Now compatible with z* coordinate 
     53         * Extended ghost cells area to properly handle scheme with spatial order >2 
     54         * Added vertical refinement (beta) 
     55         * Nesting tools for setup now up to date and working 
     56 
     57     * '''Enhancements 
     58         * Fix for tracer conservation with split explicit free surface 
     59         * Bulk formulae : move to aerobulk package (Brodeau et al. 2016), i.e. NCAR, COARE and ECMWF bulk (remove Clio and MFS bulk) 
     60         * Wetting and drying 
     61         * Added tidal self attraction and loading either read from a file or from usual "scalar" approximation 
     62         * Add a 4th order centered (CEN) and Flux Corrected Transport (FCT) tracer advection (using a 4th compact in the vertical) 
     63         * iso-neutral mixing (iso and triad operators): add the Method of Stabilizing Correction (MSC) (more accurate calculation) + add a bilaplacian case 
     64         * Lateral physics (LDF): scale aware setting of eddy viscosity and diffusivity 
     65         * Vorticity: 2 new energy conserving scheme:  ENT with Coriolis defined at T-point (better for Flux form) and EET a variant of EEN where e3t is used instead of e3f (solved the issue with e3f specification but is not enstrophy conserving) 
     66 
     67     * '''Test Cases 
     68         * The first test cases available for now are: 
     69            * CANAL: east-west periodic canal of variable size with several initial states and associated geostrophic currents (zonal jets or vortex) 
     70            * ICE_AGRIF : east-west + north-south periodic channel.  The common configuration includes an AGRIF zoom (1:3) in the middle of the basin to test how an ice patch is advected through it but one can also test the advection schemes (Prather and Ultimate-Macho) by removing the key_agrif in the cpp keys. 
     71            * ISOMIP: simple box configuration with an ice shelf with simple geometry on top. The purpose of this test case is to evaluate the impact of various schemes and new development with iceshelf cavities. The exact original setup is described [http://staff.acecrc.org.au/~bkgalton/ISOMIP/test_cavities.pdf here]. 
     72            * LOCK-EXCHANGE:classical fluid dynamics experiment that has been adapted by Haidvogel and Beckmann (1999) for testing advection schemes in ocean circulation models. It has been used by several authors including Burchard and Bolding (2002) and Ilıcak et al. (2012). The LOCK EXCHANGE experiment can in particular illustrate the impact of different choices of numerical schemes and/or subgrid closures on spurious interior mixing 
     73            * OVERFLOW: illustrates the impact of different choices of numerical schemes and/or subgrid closures on spurious interior mixing close to bottom topography. It is adapted from the non-rotating overflow configuration described in Haidvogel and Beckmann (1999) and further used by Ilıcak et al. (2012) 
     74            * VORTEX: illustrates the propagation of an anticyclonic eddy over a Beta plan and flat bottom. It is implemented here with an online refined subdomain (thanks to AGRIF library) out of which the vortex propagates. It serves as a benchmark to diagnose nesting errors as in Debreu et al. (2012), Penven et al. (2006) and Spall and Holland (1991) 
     75            * WAD: a set of simple closed basin geometries for testing the Wetting and drying capabilities. Examples range from a closed channel with EW linear bottom slope to a parabolic EW channel with a Gaussian ridge. 
     76 
     77     * '''New Reference configurations 
     78         * AGRIF_DEMO: 2 interlocked zooms (1:4 & 1:3) in the Nordic Seas + 1 zoom (1:1) at the equator 
     79         * SPITZ12: regional configuration around the Svalbard archipelago  
     80 
     81     * '''Wave coupling 
     82         * Coupled interface to external wave model 
     83         * Large scale wave interaction process added in momentum and tracer equations 
     84 
     85 
     86     * '''Passive tracer TOP and biogeochemical PISCES components 
     87        * The passive tracers transport component was redesigned toward a modular structure and users can enable each module directly through logical flags in namelist_top (no more fortran macros!). 
     88        * TOP on-line user documentation is available on NEMO Trac platform ([https://forge.ipsl.jussieu.fr/nemo/wiki/WorkingGroups/top-dg/TOP-UserQuickGuide TOP-UserQuickGuide]) 
     89        * TOP currently accounts for the following 5 modules: CFC contains inorganic carbon tracers (CFC11/CFC12/SF6), MY_TRC is a template for new modules (or external couplings), AGE deals with water age tracking, C14 as a radiocarbon passive tracer, and the companion ecosystem model PISCES. 
     90        * A generalized infrastructure was developed to handle the prescription of either surface, coastal, or open boundaries conditions for each passive tracer. 
     91        * A new configuration, named ORCA2_OFF_TRC, was created to provide a benchmark simulation environment to deal with inert carbon tracers dynamics by exploiting the offline coupling with NEMO. 
     92        * PISCES model contains new developments and modifications: 
     93          * Particulate Organic Carbon (POC) component comes with a new liability scheme, while the former Kriest parametrisation was superseded; 
     94          * A complex iron chemistry scheme is now available, with an improved description of ligands for the marine iron cycle 
     95          * Carbonate chemistry is based on MOCSY 2.0 routines (see Orr and Epitalon, 2015), by complying also with CMIP6 standards. 
     96          * Ecosystem components can be optionally modelled by means of explicit nutrient quotas (PISCES-QUOTA) 
     97 
     98     * '''High Performance Computing: performances improvements 
     99         * Reduce number of MPI communications (suppression of redundant communications, gather multiple communications into one) 
     100         * Use of MPI-3 asynchronous routines for performance (use key_mpi2 if MPI-3 not available) 
     101         * Back to standard dynamical allocation (remove of wrk_alloc/dealloc statements) 
     102         * XIOS software for IOs version 2.5 as default, and optionally available for restarts 
     103 
     104     * '''Simplification and robustness 
     105         * Revised structure of namelist_ref/_cfg and default reference values. 
     106         * Lateral physics (LDF): simplification of user interface and removal of CPP keys 
     107         * Vertical physics (ZDF) (modularity, share shear production calculation between TKE and GKS, removal of all ZDF CPP keys, removal of avmu & avmv, minimization of MPP comm.: ~15 removed) 
     108         * Remove the split-explicit ZDF scheme for both TRA and DYN 
     109         * Remove the acceleration of convergence 
     110         * Generalised lbc_lnk and lbc_nfd  
     111         * Unify mppini  
     112         * Use non uniform jpi/jpj with dynamic allocation to avoid ghost rows/columns   
     113         * MPI Message passing re coded  
     114         * Configuration interface completely rewritten (DOM module mainly suppressed , and in place: domain_cfg.nc file, or usr_def module) 
     115 
     116     * '''Collaborative Development Environment         
     117         * Access to information on NEMO wiki reorganised through portals  for users/developers/System Team and complete refactoring of all wiki pages and their layout 
     118         * Reorganisation of svn repository to be compliant with usual directory tree and facilitate building of NEMO executable 
     119         * Define and install a separate repository for test cases to all easy contributions from the NEMO Users Community 
     120         * [/discussion Forums created]  
     121         * [http://www.nemo-ocean.eu  NEMO public web site] has been cleaned and is now much nicer (using Wordpress rather than EzP)  
     122         * New mailing lists have been set up 
     123         * Improvements of reliability through automatic and regular testing of the changes made in repository  
     124 
     125 
     126 
     127 
    24128 
    25129== 2015 v3.6 stable (CMIP6) #threesixstable