Changes between Version 11 and Version 12 of ticket/0842_TRA_TRP


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Timestamp:
2011-08-03T18:54:42+02:00 (10 years ago)
Author:
cetlod
Comment:

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  • ticket/0842_TRA_TRP

    v11 v12  
    3131 * suppression of key_tradmp and replace it by a namelist parameter '''ln_tradmp''' 
    3232 
    33 '''(2)'''  [[BR]] 
     33'''(2)'''  Re-introduce a horizontal diffusivity coefficient for passive tracers [[BR]] 
    3434 
    35 After the merge of TRA-TRP, we wanted to keep in the system the use of different transport scheme for active & passive tracers. But for lateral diffusion, it's not the case : the diffusive coefficient is only define in the namelist and it is the one which is used both for the active and passive tracers scheme. 
     35After the merge of TRA-TRP, we wanted to keep in the system the use of different transport scheme for active & passive tracers. But, in nemo_v3_1,  the diffusive coefficient define for T & S are the one used also for the passive tracers. 
    3636 
    37 Because of space varying of those coef - defining in the code by the use of statement function -  
     37Because of space varying of those coefficients - defined in the code by the use of statement function -, we need to find a trick to solve that problem in a easier way 
    3838 
    39 The idea is to multiply the existing coef defining in ldftra_substitute by a factor - rldf - which will be equal to 
    40  - 1 for active tracers 
    41  - rn_ahtrc0 / rn_aht0 ( the ratio between passive tracers and active tracers coef.) 
    42  
    43 In the code, we ensure that the 2 coef have the same sign ( < 0 for bilaplacian operator ; > 0 for laplacian operator ) 
    44  
     39One solution is to multiply the existing coef defining in ldftra_substitute by a factor - rldf - which will be equal to 
    4540{{{ 
    4641#if defined key_traldf_c3d 
     
    5853#endif 
    5954}}} 
     55rldf is equal to : 
     56 - 1 for active tracers 
     57 - rn_ahtrc0 / rn_aht0 ( the ratio between passive tracers and active tracers coef.) 
     58 
     59In the code, we ensure that the 2 coef have the same sign ( < 0 for bilaplacian operator ; > 0 for laplacian operator ) 
    6060 
    6161'''(3)''' replace 3D T & S arrays by 4D array TS throughout the code [[BR]] 
     
    142142 
    143143 
    144 - we merge the two namelists &namdta_tem and &namdta_sal in one &namtsd 
    145 - we add a namelist parameter ln_tsd_init to replace the 2 CPP keys key_dtatem & key_dtasal 
     144- we merge the two namelists &namdta_tem and &namdta_sal in one &namtsd  and add a new namelist parameter ln_tsd_init to replace the 2 CPP keys key_dtatem & key_dtasal [[BR]] 
     145 
    146146 
    147147{{{