Ignore:
Timestamp:
2017-05-31T11:08:52+02:00 (3 years ago)
Author:
davestorkey
Message:

NEMO 3.6_stable: tracer trends diagnostics. See ticket #1877 for more details.

  1. Correct bugs in calculation of total trends and trends due to vertical diffusion.
  2. Output component trends every second timestep so that sum of component trends plus Asselin filter trend equals total trend.
  3. Layer-integrated versions of trends (as per CMIP6 definition) available in field_def.xml.
File:
1 edited

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  • branches/2015/nemo_v3_6_STABLE/NEMOGCM/NEMO/OPA_SRC/TRA/trazdf.F90

    r5385 r8102  
    9494 
    9595      IF( l_trdtra )   THEN                      ! save the vertical diffusive trends for further diagnostics 
    96          DO jk = 1, jpkm1 
    97             ztrdt(:,:,jk) = ( ( tsa(:,:,jk,jp_tem) - tsb(:,:,jk,jp_tem) ) / r2dtra(jk) ) - ztrdt(:,:,jk) 
    98             ztrds(:,:,jk) = ( ( tsa(:,:,jk,jp_sal) - tsb(:,:,jk,jp_sal) ) / r2dtra(jk) ) - ztrds(:,:,jk) 
    99          END DO 
     96         ! G Nurser 23 Mar 2017. Recalculate trend as Delta(e3t*T)/e3tn. 
     97         IF( lk_vvl ) THEN 
     98            DO jk = 1, jpkm1 
     99               ztrdt(:,:,jk) = ( ( tsa(:,:,jk,jp_tem)*fse3t_a(:,:,jk) - tsb(:,:,jk,jp_tem)*fse3t_b(:,:,jk) ) & 
     100                    & / (fse3t_n(:,:,jk)*r2dtra(jk)) ) - ztrdt(:,:,jk) 
     101               ztrds(:,:,jk) = ( ( tsa(:,:,jk,jp_sal)*fse3t_a(:,:,jk) - tsb(:,:,jk,jp_sal)*fse3t_b(:,:,jk) ) & 
     102                    & / (fse3t_n(:,:,jk)*r2dtra(jk)) ) - ztrds(:,:,jk) 
     103            END DO 
     104         ELSE 
     105            DO jk = 1, jpkm1 
     106               ztrdt(:,:,jk) = ( ( tsa(:,:,jk,jp_tem) - tsb(:,:,jk,jp_tem) ) / r2dtra(jk) ) - ztrdt(:,:,jk) 
     107               ztrds(:,:,jk) = ( ( tsa(:,:,jk,jp_sal) - tsb(:,:,jk,jp_sal) ) / r2dtra(jk) ) - ztrds(:,:,jk) 
     108            END DO 
     109         END IF 
    100110         CALL lbc_lnk( ztrdt, 'T', 1. ) 
    101111         CALL lbc_lnk( ztrds, 'T', 1. ) 
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