Changes between Version 14 and Version 15 of ticket/1593_CNRS9_NOC3_LDF


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Timestamp:
2015-09-24T08:37:12+02:00 (5 years ago)
Author:
gm
Comment:

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  • ticket/1593_CNRS9_NOC3_LDF

    v14 v15  
    2525Three steps: 
    2626 
    27   '''                         I. Phasing of horizontal scale factors '''               ===>>> OK see '''            revision  [https://forge.ipsl.jussieu.fr/nemo/log/branches/2015/dev_r5721_CNRS9_NOC3_LDF?rev=5737 5737]          '''             ) 
     27  '''                          I. Phasing of horizontal scale factors                         '''===>>> OK see '''             revision  [https://forge.ipsl.jussieu.fr/nemo/log/branches/2015/dev_r5721_CNRS9_NOC3_LDF?rev=5737 5737]''' 
    2828 
    2929'''   (I.1)''' standardisation of the name of quantities derived from horizontal scale factors (many modules of NEMO)[[BR]]The chosen names of quantities derived from horizontal scale factors are:[[BR]]- inverse of scale factors : r1_e1t, r1_e2t, r1_e1u, r1_e2u, r1_e1v, r1_e2v, r1_e1f, r1_e2f ;[[BR]]- surfaces and their inverse:    e1e2t, e1e2u , e1e2v, e1e2f  and, r1_e1e2t , r1_e1e2u , r1_e1e2v, r1_e1e2f ;[[BR]]- ratio (used in traldf...) : e2_e1u , e1_e2v(I.1) generalize of the use of surface scale factors ;[[BR]]These quantities are defined in memory in dom_oce.F90, and set to their proper value in domhgr.F90 
     
    3131'''   (I.2)''' add a optional read of surface scale factors at velocity points in coordinate file (domhgr.F90)[[BR]]        The input coordinate file have to include e1e2u and e1e2v in case of reduction of the scale factors in some straits.[[BR]]        When e1u or e2v are reduced in some straits, the surface at u- and v-points remains unchanged.[[BR]]        This allows to suppress the dom_vvl_orca_fix routine from dlmvvl.F90 module.[[BR]]''Note that this change modifies the model results'', as it contains a better handling of reduced strait width (i.e. reduced surface between 2 adjacent U or V points, but unchanged U and V points volume).[[BR]]The implementation performed here is a first step to the full simplification of domhgr.F90. We kept here the hard coded reduction of scale factor in some straits for some given ORCA configuration. [[BR]]A last step (see IV) will be to suppress the hard coded reduction of some scale factor as it will be always given in the coordinates.nc file together with the e1e2u & e1e2v surfaces. 
    3232 
    33   '''                         II. Phasing of the advective/diffusive trends on tracers''' 
     33  '''                          II. Phasing of the advective/diffusive trends on tracers''' 
    3434 
    35 '''   (II.1)''' LDF on tracers (both TRA & TRC) - Diffusive trends : 
     35'''   (II.1)''' LDF on tracers (both TRA & TRC) - Diffusive trends :    ''' '''===>>> OK see '''revision  [https://forge.ipsl.jussieu.fr/nemo/log/branches/2015/dev_r5721_CNRS9_NOC3_LDF?rev=5737 5758] &  [https://forge.ipsl.jussieu.fr/nemo/log/branches/2015/dev_r5721_CNRS9_NOC3_LDF?rev=5737 5759] ''' 
    3636 
    3737''operator'': [[BR]]- laplacian operator: re-entrant laplacian for iso-level, standard iso-neutral, and triad iso-neutral operators ;[[BR]]- bilaplacian operator: traldf_blp.F90 module: use of the re-entrant laplacian [[BR]]- both standard and triad iso-neutral operators includes  the Method of Stabilizing Correction (Lemarié et al. (2012) which allows bilaplacian along iso-neutral surfaces ;[[BR]]- triad operator: introduce Beckers et al. (2000) compact stencil in the cross-isoneutral direction ; make the triad operator available in TOP[[BR]]- change name:  traldf_iso_grif.F90 becomes traldf_iso_triad.F90[[BR]]- suppression of traadv_eiv.F90 ; traldf_bilap.F90 ; traldf_bilapg.F90 ; 
     
    9696  : 
    9797 
    98   '''                         III. Phasing of viscous trends''' 
     98  '''                          III. Phasing of viscous trends''' 
    9999 
    100100'''   (III.1)''' 
     
    102102... 
    103103 
    104   '''                        IV. Solve the pending issues''' 
     104  '''                         IV. Solve the pending issues''' 
    105105 
    106   '''                        (IV.1) '''       specification of eddy viscosity/diffusivity coefficients in case of grid-size dependency.[[BR]]       Issue:  define the grid-size dependency in such a way that does not require the Equator being inside the domain.[[BR]]       Solution: add a scalar in the coordinate file which is equal to the grid-size at the equator even if Equator is not in the domain[[BR]]       and use this scalar to compute the grid-size dependency of the coefficients. '''       (IV.2) '''       specification of lateral friction at the coast.[[BR]]       Issue:  the different values of fmask at the coast have been removed so that this lateral boundary condition doesn't affect the advective term ('''       double check that'''        !). fmask is still used for laplacian and bilaplacian viscosities. Nevertheless, the magnitude of lateral friction depends on the magnitude of ahm (bhm, reap.). It seems better to define this magnitude [[BR]]       Solution: add a scalar in the coordinate file which is equal to the grid-size at the equator even if Equator is not in the domain[[BR]]       and use this scalar to compute the grid-size dependency of the coefficients. 
     106  '''                         (IV.1) '''        specification of eddy viscosity/diffusivity coefficients in case of grid-size dependency.[[BR]]        Issue:  define the grid-size dependency in such a way that does not require the Equator being inside the domain.[[BR]]        Solution: add a scalar in the coordinate file which is equal to the grid-size at the equator even if Equator is not in the domain[[BR]]        and use this scalar to compute the grid-size dependency of the coefficients. '''        (IV.2) '''        specification of lateral friction at the coast.[[BR]]        Issue:  the different values of fmask at the coast have been removed so that this lateral boundary condition doesn't affect the advective term ('''        double check that'''         !). fmask is still used for laplacian and bilaplacian viscosities. Nevertheless, the magnitude of lateral friction depends on the magnitude of ahm (bhm, reap.). It seems better to define this magnitude [[BR]]        Solution: add a scalar in the coordinate file which is equal to the grid-size at the equator even if Equator is not in the domain[[BR]]        and use this scalar to compute the grid-size dependency of the coefficients. 
    107107 
    108108... 
    109109 
    110   '''       V. Finalize the simplification''' 
     110  '''        V. Finalize the simplification''' 
    111111 
    112   '''       (V.1) '''       suppression of hard coded reduction of scale factor in some straits for some given ORCA configuration.[[BR]]       '''       add'''        in NEMOGCM/TOOLS a directory a program that read a coordinates.nc file apply a reduction of scale factors in some straits, and create the associated extended coordinates file (coordinates_e1e2u_v.nc).[[BR]]       create the extended coordinates files form ORCA 2°, 1°, and 0.5°. 
     112  '''        (V.1) '''        suppression of hard coded reduction of scale factor in some straits for some given ORCA configuration.[[BR]]        '''        add'''         in NEMOGCM/TOOLS a directory a program that read a coordinates.nc file apply a reduction of scale factors in some straits, and create the associated extended coordinates file (coordinates_e1e2u_v.nc).[[BR]]        create the extended coordinates files form ORCA 2°, 1°, and 0.5°. 
    113113 
    114114...