!!---------------------------------------------------------------------- !! *** ldfdyn_c2d.h90 *** !!---------------------------------------------------------------------- !! ldf_dyn_c2d : set the lateral viscosity coefficients !! ldf_dyn_c2d_orca : specific case for orca r2 and r4 !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! NEMO/OPA 3.3 , NEMO Consortium (2010) !! $Id$ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- SUBROUTINE ldf_dyn_c2d( ld_print ) !!---------------------------------------------------------------------- !! *** ROUTINE ldf_dyn_c2d *** !! !! ** Purpose : initializations of the horizontal ocean physics !! !! ** Method : !! 2D eddy viscosity coefficients ( longitude, latitude ) !! !! harmonic operator : ahm1 is defined at t-point !! ahm2 is defined at f-point !! + isopycnal : ahm3 is defined at u-point !! or geopotential ahm4 is defined at v-point !! iso-model level : ahm3, ahm4 not used !! !! biharmonic operator : ahm3 is defined at u-point !! ahm4 is defined at v-point !! : ahm1, ahm2 not used !! !!---------------------------------------------------------------------- LOGICAL, INTENT (in) :: ld_print ! If true, output arrays on numout ! INTEGER :: ji, jj REAL(wp) :: za00, zd_max, zetmax, zeumax, zefmax, zevmax !!---------------------------------------------------------------------- IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'ldf_dyn_c2d : 2d lateral eddy viscosity coefficient' IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' ! harmonic operator (ahm1, ahm2) : ( T- and F- points) (used for laplacian operators ! =============================== whatever its orientation is) IF( ln_dynldf_lap ) THEN ! define ahm1 and ahm2 at the right grid point position ! (USER: modify ahm1 and ahm2 following your desiderata) zd_max = MAX( MAXVAL( e1t(:,:) ), MAXVAL( e2t(:,:) ) ) IF( lk_mpp ) CALL mpp_max( zd_max ) ! max over the global domain IF(lwp) WRITE(numout,*) ' laplacian operator: ahm proportional to e1' IF(lwp) WRITE(numout,*) ' maximum grid-spacing = ', zd_max, ' maximum value for ahm = ', ahm0 za00 = ahm0 / zd_max DO jj = 1, jpj DO ji = 1, jpi zetmax = MAX( e1t(ji,jj), e2t(ji,jj) ) zefmax = MAX( e1f(ji,jj), e2f(ji,jj) ) ahm1(ji,jj) = za00 * zetmax ahm2(ji,jj) = za00 * zefmax END DO END DO IF( ln_dynldf_iso ) THEN IF(lwp) WRITE(numout,*) ' Caution, as implemented now, the isopycnal part of momentum' IF(lwp) WRITE(numout,*) ' mixing use aht0 as eddy viscosity coefficient. Thus, it is' IF(lwp) WRITE(numout,*) ' uniform and you must be sure that your ahm is greater than' IF(lwp) WRITE(numout,*) ' aht0 everywhere in the model domain.' ENDIF ! Special case for ORCA R1, R2 and R4 configurations (overwrite the value of ahm1 ahm2) ! ============================================== IF( cp_cfg == "orca" .AND. ( jp_cfg == 2 .OR. jp_cfg == 4 ) ) CALL ldf_dyn_c2d_orca( ld_print ) IF( cp_cfg == "orca" .AND. jp_cfg == 1) CALL ldf_dyn_c2d_orca_R1( ld_print ) ! Control print IF( lwp .AND. ld_print ) THEN WRITE(numout,*) WRITE(numout,*) 'inildf: 2D ahm1 array' CALL prihre(ahm1,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) WRITE(numout,*) WRITE(numout,*) 'inildf: 2D ahm2 array' CALL prihre(ahm2,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) ENDIF ENDIF ! biharmonic operator (ahm3, ahm4) : at U- and V-points (used for bilaplacian operator ! ================================= whatever its orientation is) IF( ln_dynldf_bilap ) THEN ! (USER: modify ahm3 and ahm4 following your desiderata) ! Here: ahm is proportional to the cube of the maximum of the gridspacing ! in the to horizontal direction zd_max = MAX( MAXVAL( e1u(:,:) ), MAXVAL( e2u(:,:) ) ) IF( lk_mpp ) CALL mpp_max( zd_max ) ! max over the global domain IF(lwp) WRITE(numout,*) ' bi-laplacian operator: ahm proportional to e1**3 ' IF(lwp) WRITE(numout,*) ' maximum grid-spacing = ', zd_max, ' maximum value for ahm = ', ahm0 za00 = ahm0_blp / ( zd_max * zd_max * zd_max ) DO jj = 1, jpj DO ji = 1, jpi zeumax = MAX( e1u(ji,jj), e2u(ji,jj) ) zevmax = MAX( e1v(ji,jj), e2v(ji,jj) ) ahm3(ji,jj) = za00 * zeumax * zeumax * zeumax ahm4(ji,jj) = za00 * zevmax * zevmax * zevmax END DO END DO ! Control print IF( lwp .AND. ld_print ) THEN WRITE(numout,*) WRITE(numout,*) 'inildf: ahm3 array' CALL prihre(ahm3,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) WRITE(numout,*) WRITE(numout,*) 'inildf: ahm4 array' CALL prihre(ahm4,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) ENDIF ENDIF ! END SUBROUTINE ldf_dyn_c2d SUBROUTINE ldf_dyn_c2d_orca( ld_print ) !!---------------------------------------------------------------------- !! *** ROUTINE ldf_dyn_c2d *** !! !! **** W A R N I N G **** !! !! ORCA R2 and R4 configurations !! !! **** W A R N I N G **** !! !! ** Purpose : initializations of the lateral viscosity for orca R2 !! !! ** Method : blah blah blah... !! !!---------------------------------------------------------------------- USE ldftra_oce, ONLY: aht0 USE iom ! LOGICAL, INTENT (in) :: ld_print ! If true, output arrays on numout ! INTEGER :: ji, jj, jn ! dummy loop indices INTEGER :: inum, iim, ijm ! local integers INTEGER :: ifreq, il1, il2, ij, ii INTEGER :: ijpt0,ijpt1, ierror REAL(wp) :: zahmeq, zcoft, zcoff, zmsk CHARACTER (len=15) :: clexp INTEGER, POINTER, DIMENSION(:,:) :: icof REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ztemp2d ! temporary array to read ahmcoef file !!---------------------------------------------------------------------- ! CALL wrk_alloc( jpi , jpj , icof ) ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'inildf: 2d eddy viscosity coefficient' IF(lwp) WRITE(numout,*) '~~~~~~ --' IF(lwp) WRITE(numout,*) ' orca ocean configuration' IF( cp_cfg == "orca" .AND. cp_cfz == "antarctic" ) THEN ! ! 1.2 Modify ahm ! -------------- IF(lwp)WRITE(numout,*) ' inildf: Antarctic ocean' IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' IF(lwp)WRITE(numout,*) ' north boundary increase' ahm1(:,:) = ahm0 ahm2(:,:) = ahm0 ijpt0=max(1,min(49 -njmpp+1,jpj)) ijpt1=max(0,min(49-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*2. ahm1(:,jj)=ahm0*2. END DO ijpt0=max(1,min(48 -njmpp+1,jpj)) ijpt1=max(0,min(48-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.9 ahm1(:,jj)=ahm0*1.75 END DO ijpt0=max(1,min(47 -njmpp+1,jpj)) ijpt1=max(0,min(47-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.5 ahm1(:,jj)=ahm0*1.25 END DO ijpt0=max(1,min(46 -njmpp+1,jpj)) ijpt1=max(0,min(46-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.1 END DO ELSE IF( cp_cfg == "orca" .AND. cp_cfz == "arctic" ) THEN ! 1.2 Modify ahm ! -------------- IF(lwp)WRITE(numout,*) ' inildf: Arctic ocean' IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' IF(lwp)WRITE(numout,*) ' south and west boundary increase' ahm1(:,:) = ahm0 ahm2(:,:) = ahm0 ijpt0=max(1,min(98-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(98-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*2. ahm1(:,jj)=ahm0*2. END DO ijpt0=max(1,min(99-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(99-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.9 ahm1(:,jj)=ahm0*1.75 END DO ijpt0=max(1,min(100-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(100-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.5 ahm1(:,jj)=ahm0*1.25 END DO ijpt0=max(1,min(101-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(101-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.1 END DO ELSE ! Read 2d integer array to specify western boundary increase in the ! ===================== equatorial strip (20N-20S) defined at t-points ! ALLOCATE( ztemp2d(jpi,jpj) ) ztemp2d(:,:) = 0. CALL iom_open ( 'ahmcoef.nc', inum ) CALL iom_get ( inum, jpdom_data, 'icof', ztemp2d) icof(:,:) = NINT(ztemp2d(:,:)) CALL iom_close( inum ) DEALLOCATE(ztemp2d) ! Set ahm1 and ahm2 ( T- and F- points) (used for laplacian operator) ! ================= ! define ahm1 and ahm2 at the right grid point position ! (USER: modify ahm1 and ahm2 following your desiderata) ! Decrease ahm to zahmeq m2/s in the tropics ! (from 90 to 20 degre: ahm = constant ! from 20 to 2.5 degre: ahm = decrease in (1-cos)/2 ! from 2.5 to 0 degre: ahm = constant ! symmetric in the south hemisphere) zahmeq = aht0 DO jj = 1, jpj DO ji = 1, jpi IF( ABS( gphif(ji,jj) ) >= 20. ) THEN ahm2(ji,jj) = ahm0 ELSEIF( ABS( gphif(ji,jj) ) <= 2.5 ) THEN ahm2(ji,jj) = zahmeq ELSE ahm2(ji,jj) = zahmeq + (ahm0-zahmeq)/2. & * ( 1. - COS( rad * ( ABS(gphif(ji,jj))-2.5 ) * 180. / 17.5 ) ) ENDIF IF( ABS( gphit(ji,jj) ) >= 20. ) THEN ahm1(ji,jj) = ahm0 ELSEIF( ABS( gphit(ji,jj) ) <= 2.5 ) THEN ahm1(ji,jj) = zahmeq ELSE ahm1(ji,jj) = zahmeq + (ahm0-zahmeq)/2. & * ( 1. - COS( rad * ( ABS(gphit(ji,jj))-2.5 ) * 180. / 17.5 ) ) ENDIF END DO END DO ! increase along western boundaries of equatorial strip ! t-point DO jj = 1, jpjm1 DO ji = 1, jpim1 zcoft = FLOAT( icof(ji,jj) ) / 100. ahm1(ji,jj) = zcoft * ahm0 + (1.-zcoft) * ahm1(ji,jj) END DO END DO ! f-point icof(:,:) = icof(:,:) * tmask(:,:,1) DO jj = 1, jpjm1 DO ji = 1, jpim1 ! NO vector opt. zmsk = tmask(ji,jj+1,1) + tmask(ji+1,jj+1,1) + tmask(ji,jj,1) + tmask(ji,jj+1,1) IF( zmsk == 0. ) THEN zcoff = 1. ELSE zcoff = FLOAT( icof(ji,jj+1) + icof(ji+1,jj+1) + icof(ji,jj) + icof(ji,jj+1) ) & / (zmsk * 100.) ENDIF ahm2(ji,jj) = zcoff * ahm0 + (1.-zcoff) * ahm2(ji,jj) END DO END DO ENDIF ! Lateral boundary conditions on ( ahm1, ahm2 ) ! ============== CALL lbc_lnk( ahm1, 'T', 1. ) ! T-point, unchanged sign CALL lbc_lnk( ahm2, 'F', 1. ) ! F-point, unchanged sign ! Control print IF( lwp .AND. ld_print ) THEN WRITE(numout,*) WRITE(numout,*) 'inildf: 2D ahm1 array' CALL prihre(ahm1,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) WRITE(numout,*) WRITE(numout,*) 'inildf: 2D ahm2 array' CALL prihre(ahm2,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) ENDIF ! CALL wrk_dealloc( jpi , jpj , icof ) ! END SUBROUTINE ldf_dyn_c2d_orca SUBROUTINE ldf_dyn_c2d_orca_R1( ld_print ) !!---------------------------------------------------------------------- !! *** ROUTINE ldf_dyn_c2d *** !! !! **** W A R N I N G **** !! !! ORCA R1 configuration !! !! **** W A R N I N G **** !! !! ** Purpose : initializations of the lateral viscosity for orca R1 !! !! ** Method : blah blah blah... !! !!---------------------------------------------------------------------- USE ldftra_oce, ONLY: aht0 USE iom ! LOGICAL, INTENT (in) :: ld_print ! If true, output arrays on numout ! INTEGER :: ji, jj, jn ! dummy loop indices INTEGER :: inum ! temporary logical unit INTEGER :: iim, ijm INTEGER :: ifreq, il1, il2, ij, ii INTEGER :: ijpt0,ijpt1, ierror REAL(wp) :: zahmeq, zcoft, zcoff, zmsk, zam20s CHARACTER (len=15) :: clexp INTEGER, POINTER, DIMENSION(:,:) :: icof REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ztemp2d ! temporary array to read ahmcoef file !!---------------------------------------------------------------------- ! CALL wrk_alloc( jpi , jpj , icof ) ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'inildf: 2d eddy viscosity coefficient' IF(lwp) WRITE(numout,*) '~~~~~~ --' IF(lwp) WRITE(numout,*) ' orca_r1 configuration' IF( cp_cfg == "orca" .AND. cp_cfz == "antarctic" ) THEN ! ! 1.2 Modify ahm ! -------------- IF(lwp)WRITE(numout,*) ' inildf: Antarctic ocean' IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' IF(lwp)WRITE(numout,*) ' north boundary increase' ahm1(:,:) = ahm0 ahm2(:,:) = ahm0 ijpt0=max(1,min(49 -njmpp+1,jpj)) ijpt1=max(0,min(49-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*2. ahm1(:,jj)=ahm0*2. END DO ijpt0=max(1,min(48 -njmpp+1,jpj)) ijpt1=max(0,min(48-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.9 ahm1(:,jj)=ahm0*1.75 END DO ijpt0=max(1,min(47 -njmpp+1,jpj)) ijpt1=max(0,min(47-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.5 ahm1(:,jj)=ahm0*1.25 END DO ijpt0=max(1,min(46 -njmpp+1,jpj)) ijpt1=max(0,min(46-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.1 END DO ELSE IF( cp_cfg == "orca" .AND. cp_cfz == "arctic" ) THEN ! 1.2 Modify ahm ! -------------- IF(lwp)WRITE(numout,*) ' inildf: Arctic ocean' IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' IF(lwp)WRITE(numout,*) ' south and west boundary increase' ahm1(:,:) = ahm0 ahm2(:,:) = ahm0 ijpt0=max(1,min(98-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(98-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*2. ahm1(:,jj)=ahm0*2. END DO ijpt0=max(1,min(99-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(99-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.9 ahm1(:,jj)=ahm0*1.75 END DO ijpt0=max(1,min(100-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(100-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.5 ahm1(:,jj)=ahm0*1.25 END DO ijpt0=max(1,min(101-jpjzoom+1-njmpp+1,jpj)) ijpt1=max(0,min(101-jpjzoom+1-njmpp+1,jpj-1)) DO jj=ijpt0,ijpt1 ahm2(:,jj)=ahm0*1.1 END DO ELSE ! Read 2d integer array to specify western boundary increase in the ! ===================== equatorial strip (20N-20S) defined at t-points ALLOCATE( ztemp2d(jpi,jpj) ) ztemp2d(:,:) = 0. CALL iom_open ( 'ahmcoef.nc', inum ) CALL iom_get ( inum, jpdom_data, 'icof', ztemp2d) icof(:,:) = NINT(ztemp2d(:,:)) CALL iom_close( inum ) DEALLOCATE(ztemp2d) ! Set ahm1 and ahm2 ( T- and F- points) (used for laplacian operator) ! ================= ! define ahm1 and ahm2 at the right grid point position ! (USER: modify ahm1 and ahm2 following your desiderata) ! Decrease ahm to zahmeq m2/s in the tropics ! (from 90 to 20 degrees: ahm = scaled by local metrics ! from 20 to 2.5 degrees: ahm = decrease in (1-cos)/2 ! from 2.5 to 0 degrees: ahm = constant ! symmetric in the south hemisphere) zahmeq = aht0 zam20s = ahm0*COS( rad * 20. ) DO jj = 1, jpj DO ji = 1, jpi IF( ABS( gphif(ji,jj) ) >= 20. ) THEN ! leave as set in ldf_dyn_c2d ELSEIF( ABS( gphif(ji,jj) ) <= 2.5 ) THEN ahm2(ji,jj) = zahmeq ELSE ahm2(ji,jj) = zahmeq + (zam20s-zahmeq)/2. & * ( 1. - COS( rad * ( ABS(gphif(ji,jj))-2.5 ) * 180. / 17.5 ) ) ENDIF IF( ABS( gphit(ji,jj) ) >= 20. ) THEN ! leave as set in ldf_dyn_c2d ELSEIF( ABS( gphit(ji,jj) ) <= 2.5 ) THEN ahm1(ji,jj) = zahmeq ELSE ahm1(ji,jj) = zahmeq + (zam20s-zahmeq)/2. & * ( 1. - COS( rad * ( ABS(gphit(ji,jj))-2.5 ) * 180. / 17.5 ) ) ENDIF END DO END DO ! increase along western boundaries of equatorial strip ! t-point DO jj = 1, jpjm1 DO ji = 1, jpim1 IF( ABS( gphit(ji,jj) ) < 20. ) THEN zcoft = FLOAT( icof(ji,jj) ) / 100. ahm1(ji,jj) = zcoft * ahm0 + (1.-zcoft) * ahm1(ji,jj) ENDIF END DO END DO ! f-point icof(:,:) = icof(:,:) * tmask(:,:,1) DO jj = 1, jpjm1 DO ji = 1, jpim1 IF( ABS( gphif(ji,jj) ) < 20. ) THEN zmsk = tmask(ji,jj+1,1) + tmask(ji+1,jj+1,1) + tmask(ji,jj,1) + tmask(ji,jj+1,1) IF( zmsk == 0. ) THEN zcoff = 1. ELSE zcoff = FLOAT( icof(ji,jj+1) + icof(ji+1,jj+1) + icof(ji,jj) + icof(ji,jj+1) ) & / (zmsk * 100.) ENDIF ahm2(ji,jj) = zcoff * ahm0 + (1.-zcoff) * ahm2(ji,jj) ENDIF END DO END DO ENDIF ! Lateral boundary conditions on ( ahm1, ahm2 ) ! ============== CALL lbc_lnk( ahm1, 'T', 1. ) ! T-point, unchanged sign CALL lbc_lnk( ahm2, 'F', 1. ) ! F-point, unchanged sign ! Control print IF( lwp .AND. ld_print ) THEN WRITE(numout,*) WRITE(numout,*) 'inildf: 2D ahm1 array' CALL prihre(ahm1,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) WRITE(numout,*) WRITE(numout,*) 'inildf: 2D ahm2 array' CALL prihre(ahm2,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) ENDIF ! CALL wrk_dealloc( jpi , jpj , icof ) ! END SUBROUTINE ldf_dyn_c2d_orca_R1