| 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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| 6 | !! History : 1.0 ! 2003-08 (G. Madec) original code |
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| 7 | !! 3.2 ! 2009-07 (S. Masson, G. Madec) IOM + merge of DO-loop |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! zdf_mxl : Compute the turbocline and mixed layer depths. |
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| 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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| 13 | USE zdf_oce ! ocean vertical physics |
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| 14 | USE in_out_manager ! I/O manager |
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| 15 | USE prtctl ! Print control |
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| 16 | USE iom |
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| 17 | |
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| 18 | IMPLICIT NONE |
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| 19 | PRIVATE |
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| 20 | |
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| 21 | PUBLIC zdf_mxl ! called by step.F90 |
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| 22 | |
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| 23 | INTEGER , PUBLIC, DIMENSION(jpi,jpj) :: nmln !: number of level in the mixed layer (used by TOP) |
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| 24 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj) :: hmld !: mixing layer depth (turbocline) [m] |
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| 25 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj) :: hmlp !: mixed layer depth (rho=rho0+zdcrit) [m] |
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| 26 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj) :: hmlpt !: mixed layer depth at t-points [m] |
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| 27 | |
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| 28 | !! * Substitutions |
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| 29 | # include "domzgr_substitute.h90" |
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| 30 | !!---------------------------------------------------------------------- |
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| 31 | !! NEMO/OPA 3.2 , LOCEAN-IPSL (2009) |
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| 32 | !! $Id: zdfmxl.F90 1585 2009-08-06 07:29:43Z smasson $ |
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| 33 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 34 | !!---------------------------------------------------------------------- |
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| 35 | |
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| 36 | CONTAINS |
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| 37 | |
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| 38 | SUBROUTINE zdf_mxl( kt ) |
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| 39 | !!---------------------------------------------------------------------- |
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| 40 | !! *** ROUTINE zdfmxl *** |
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| 41 | !! |
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| 42 | !! ** Purpose : Compute the turbocline depth and the mixed layer depth |
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| 43 | !! with density criteria. |
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| 44 | !! |
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| 45 | !! ** Method : The mixed layer depth is the shallowest W depth with |
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| 46 | !! the density of the corresponding T point (just bellow) bellow a |
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| 47 | !! given value defined locally as rho(10m) + zrho_c |
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| 48 | !! The turbocline depth is the depth at which the vertical |
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| 49 | !! eddy diffusivity coefficient (resulting from the vertical physics |
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| 50 | !! alone, not the isopycnal part, see trazdf.F) fall below a given |
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| 51 | !! value defined locally (avt_c here taken equal to 5 cm/s2) |
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| 52 | !! |
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| 53 | !! ** Action : nmln, hmld, hmlp, hmlpt |
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| 54 | !!---------------------------------------------------------------------- |
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| 55 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 56 | !! |
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| 57 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 58 | INTEGER :: iikn, iiki ! temporary integer within a do loop |
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| 59 | INTEGER, DIMENSION(jpi,jpj) :: imld ! temporary workspace |
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| 60 | REAL(wp) :: zrho_c = 0.01_wp ! density criterion for mixed layer depth |
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| 61 | REAL(wp) :: zavt_c = 5.e-4_wp ! Kz criterion for the turbocline depth |
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| 62 | !!---------------------------------------------------------------------- |
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| 63 | |
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| 64 | IF( kt == nit000 ) THEN |
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| 65 | IF(lwp) WRITE(numout,*) |
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| 66 | IF(lwp) WRITE(numout,*) 'zdf_mxl : mixed layer depth' |
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| 67 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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| 68 | ENDIF |
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| 69 | |
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| 70 | ! w-level of the mixing and mixed layers |
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| 71 | nmln(:,:) = mbathy(:,:) ! Initialization to the number of w ocean point mbathy |
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| 72 | imld(:,:) = mbathy(:,:) |
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| 73 | DO jk = jpkm1, nlb10, -1 ! from the bottom to nlb10 |
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| 74 | DO jj = 1, jpj |
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| 75 | DO ji = 1, jpi |
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| 76 | IF( rhop(ji,jj,jk) > rhop(ji,jj,nla10) + zrho_c ) nmln(ji,jj) = jk ! Mixed layer |
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| 77 | IF( avt (ji,jj,jk) < zavt_c ) imld(ji,jj) = jk ! Turbocline |
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| 78 | END DO |
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| 79 | END DO |
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| 80 | END DO |
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| 81 | ! depth of the mixing and mixed layers |
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| 82 | DO jj = 1, jpj |
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| 83 | DO ji = 1, jpi |
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| 84 | iiki = imld(ji,jj) |
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| 85 | iikn = nmln(ji,jj) |
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| 86 | hmld (ji,jj) = fsdepw(ji,jj,iiki ) * tmask(ji,jj,1) ! Turbocline depth |
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| 87 | hmlp (ji,jj) = fsdepw(ji,jj,iikn ) * tmask(ji,jj,1) ! Mixed layer depth |
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| 88 | hmlpt(ji,jj) = fsdept(ji,jj,iikn-1) ! depth of the last T-point inside the mixed layer |
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| 89 | END DO |
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| 90 | END DO |
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| 91 | CALL iom_put( "mldr10_1", hmlp ) ! mixed layer depth |
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| 92 | CALL iom_put( "mldkz5" , hmld ) ! turbocline depth |
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| 93 | |
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| 94 | IF(ln_ctl) CALL prt_ctl( tab2d_1=REAL(nmln,wp), clinfo1=' nmln : ', tab2d_2=hmlp, clinfo2=' hmlp : ', ovlap=1 ) |
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| 95 | ! |
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| 96 | END SUBROUTINE zdf_mxl |
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| 97 | |
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| 98 | !!====================================================================== |
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| 99 | END MODULE zdfmxl |
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