[3] | 1 | MODULE zdfmxl |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE zdfmxl *** |
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| 4 | !! Ocean physics: mixed layer depth |
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| 5 | !!====================================================================== |
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[1559] | 6 | !! History : 1.0 ! 2003-08 (G. Madec) original code |
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[1585] | 7 | !! 3.2 ! 2009-07 (S. Masson, G. Madec) IOM + merge of DO-loop |
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[3] | 8 | !!---------------------------------------------------------------------- |
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[1585] | 9 | !! zdf_mxl : Compute the turbocline and mixed layer depths. |
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[3] | 10 | !!---------------------------------------------------------------------- |
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| 11 | USE oce ! ocean dynamics and tracers variables |
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| 12 | USE dom_oce ! ocean space and time domain variables |
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[1585] | 13 | USE zdf_oce ! ocean vertical physics |
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[3] | 14 | USE in_out_manager ! I/O manager |
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[258] | 15 | USE prtctl ! Print control |
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[2715] | 16 | USE iom ! I/O library |
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| 17 | USE lib_mpp ! MPP library |
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[3186] | 18 | USE wrk_nemo ! work arrays |
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[2758] | 19 | USE trc_oce, ONLY : lk_offline ! offline flag |
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[3] | 20 | |
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| 21 | IMPLICIT NONE |
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| 22 | PRIVATE |
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| 23 | |
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[2715] | 24 | PUBLIC zdf_mxl ! called by step.F90 |
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[3] | 25 | |
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[2715] | 26 | INTEGER , PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: nmln !: number of level in the mixed layer (used by TOP) |
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| 27 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmld !: mixing layer depth (turbocline) [m] |
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| 28 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlp !: mixed layer depth (rho=rho0+zdcrit) [m] |
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| 29 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlpt !: mixed layer depth at t-points [m] |
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[3] | 30 | |
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| 31 | !! * Substitutions |
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| 32 | # include "domzgr_substitute.h90" |
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| 33 | !!---------------------------------------------------------------------- |
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[2715] | 34 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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[1152] | 35 | !! $Id$ |
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[2715] | 36 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 37 | !!---------------------------------------------------------------------- |
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| 38 | CONTAINS |
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| 39 | |
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[2715] | 40 | INTEGER FUNCTION zdf_mxl_alloc() |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! *** FUNCTION zdf_mxl_alloc *** |
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| 43 | !!---------------------------------------------------------------------- |
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[2787] | 44 | zdf_mxl_alloc = 0 ! set to zero if no array to be allocated |
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[2758] | 45 | IF( .NOT. ALLOCATED( nmln ) ) THEN |
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| 46 | ALLOCATE( nmln(jpi,jpj), hmld(jpi,jpj), hmlp(jpi,jpj), hmlpt(jpi,jpj), STAT= zdf_mxl_alloc ) |
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| 47 | ! |
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| 48 | IF( lk_mpp ) CALL mpp_sum ( zdf_mxl_alloc ) |
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| 49 | IF( zdf_mxl_alloc /= 0 ) CALL ctl_warn('zdf_mxl_alloc: failed to allocate arrays.') |
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| 50 | ! |
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| 51 | ENDIF |
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[2715] | 52 | END FUNCTION zdf_mxl_alloc |
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| 53 | |
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| 54 | |
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[3] | 55 | SUBROUTINE zdf_mxl( kt ) |
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| 56 | !!---------------------------------------------------------------------- |
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| 57 | !! *** ROUTINE zdfmxl *** |
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| 58 | !! |
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[1585] | 59 | !! ** Purpose : Compute the turbocline depth and the mixed layer depth |
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| 60 | !! with density criteria. |
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[3] | 61 | !! |
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[1577] | 62 | !! ** Method : The mixed layer depth is the shallowest W depth with |
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| 63 | !! the density of the corresponding T point (just bellow) bellow a |
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| 64 | !! given value defined locally as rho(10m) + zrho_c |
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[1585] | 65 | !! The turbocline depth is the depth at which the vertical |
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| 66 | !! eddy diffusivity coefficient (resulting from the vertical physics |
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| 67 | !! alone, not the isopycnal part, see trazdf.F) fall below a given |
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| 68 | !! value defined locally (avt_c here taken equal to 5 cm/s2) |
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[3] | 69 | !! |
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[1585] | 70 | !! ** Action : nmln, hmld, hmlp, hmlpt |
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[1559] | 71 | !!---------------------------------------------------------------------- |
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[2715] | 72 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| 73 | !! |
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| 74 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 75 | INTEGER :: iikn, iiki ! temporary integer within a do loop |
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[3155] | 76 | INTEGER, POINTER, DIMENSION(:,:) :: imld ! temporary workspace |
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[2715] | 77 | REAL(wp) :: zrho_c = 0.01_wp ! density criterion for mixed layer depth |
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| 78 | REAL(wp) :: zavt_c = 5.e-4_wp ! Kz criterion for the turbocline depth |
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[3] | 79 | !!---------------------------------------------------------------------- |
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| 80 | |
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[3155] | 81 | CALL wrk_alloc( jpi,jpj, imld ) |
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[2715] | 82 | |
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[3] | 83 | IF( kt == nit000 ) THEN |
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| 84 | IF(lwp) WRITE(numout,*) |
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| 85 | IF(lwp) WRITE(numout,*) 'zdf_mxl : mixed layer depth' |
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| 86 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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[2715] | 87 | ! ! allocate zdfmxl arrays |
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| 88 | IF( zdf_mxl_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'zdf_mxl : unable to allocate arrays' ) |
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[3] | 89 | ENDIF |
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| 90 | |
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[1559] | 91 | ! w-level of the mixing and mixed layers |
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[2528] | 92 | nmln(:,:) = mbkt(:,:) + 1 ! Initialization to the number of w ocean point |
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| 93 | imld(:,:) = mbkt(:,:) + 1 |
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[1577] | 94 | DO jk = jpkm1, nlb10, -1 ! from the bottom to nlb10 |
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[3] | 95 | DO jj = 1, jpj |
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| 96 | DO ji = 1, jpi |
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[1577] | 97 | IF( rhop(ji,jj,jk) > rhop(ji,jj,nla10) + zrho_c ) nmln(ji,jj) = jk ! Mixed layer |
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[1585] | 98 | IF( avt (ji,jj,jk) < zavt_c ) imld(ji,jj) = jk ! Turbocline |
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[3] | 99 | END DO |
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| 100 | END DO |
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| 101 | END DO |
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[1559] | 102 | ! depth of the mixing and mixed layers |
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[3] | 103 | DO jj = 1, jpj |
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| 104 | DO ji = 1, jpi |
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[1585] | 105 | iiki = imld(ji,jj) |
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[1577] | 106 | iikn = nmln(ji,jj) |
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[1585] | 107 | hmld (ji,jj) = fsdepw(ji,jj,iiki ) * tmask(ji,jj,1) ! Turbocline depth |
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[1577] | 108 | hmlp (ji,jj) = fsdepw(ji,jj,iikn ) * tmask(ji,jj,1) ! Mixed layer depth |
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| 109 | hmlpt(ji,jj) = fsdept(ji,jj,iikn-1) ! depth of the last T-point inside the mixed layer |
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[3] | 110 | END DO |
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| 111 | END DO |
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[2758] | 112 | IF( .NOT.lk_offline ) THEN ! no need to output in offline mode |
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| 113 | CALL iom_put( "mldr10_1", hmlp ) ! mixed layer depth |
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| 114 | CALL iom_put( "mldkz5" , hmld ) ! turbocline depth |
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| 115 | ENDIF |
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[1482] | 116 | |
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[1577] | 117 | IF(ln_ctl) CALL prt_ctl( tab2d_1=REAL(nmln,wp), clinfo1=' nmln : ', tab2d_2=hmlp, clinfo2=' hmlp : ', ovlap=1 ) |
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[1559] | 118 | ! |
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[3155] | 119 | CALL wrk_dealloc( jpi,jpj, imld ) |
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[2715] | 120 | ! |
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[3] | 121 | END SUBROUTINE zdf_mxl |
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| 122 | |
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| 123 | !!====================================================================== |
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| 124 | END MODULE zdfmxl |
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