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 ! I/O library |
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17 | USE lib_mpp ! MPP library |
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18 | USE wrk_nemo ! work arrays |
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19 | USE timing ! Timing |
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20 | USE trc_oce, ONLY : lk_offline ! offline flag |
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21 | |
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22 | IMPLICIT NONE |
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23 | PRIVATE |
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24 | |
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25 | PUBLIC zdf_mxl ! called by step.F90 |
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26 | |
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27 | INTEGER , PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: nmln !: number of level in the mixed layer (used by TOP) |
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28 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmld !: mixing layer depth (turbocline) [m] |
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29 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlp !: mixed layer depth (rho=rho0+zdcrit) [m] |
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30 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlpt !: mixed layer depth at t-points [m] |
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31 | |
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32 | !! * Substitutions |
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33 | # include "domzgr_substitute.h90" |
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34 | !!---------------------------------------------------------------------- |
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35 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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36 | !! $Id$ |
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37 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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38 | !!---------------------------------------------------------------------- |
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39 | CONTAINS |
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40 | |
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41 | INTEGER FUNCTION zdf_mxl_alloc() |
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42 | !!---------------------------------------------------------------------- |
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43 | !! *** FUNCTION zdf_mxl_alloc *** |
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44 | !!---------------------------------------------------------------------- |
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45 | zdf_mxl_alloc = 0 ! set to zero if no array to be allocated |
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46 | IF( .NOT. ALLOCATED( nmln ) ) THEN |
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47 | ALLOCATE( nmln(jpi,jpj), hmld(jpi,jpj), hmlp(jpi,jpj), hmlpt(jpi,jpj), STAT= zdf_mxl_alloc ) |
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48 | ! |
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49 | IF( lk_mpp ) CALL mpp_sum ( zdf_mxl_alloc ) |
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50 | IF( zdf_mxl_alloc /= 0 ) CALL ctl_warn('zdf_mxl_alloc: failed to allocate arrays.') |
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51 | ! |
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52 | ENDIF |
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53 | END FUNCTION zdf_mxl_alloc |
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54 | |
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55 | |
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56 | SUBROUTINE zdf_mxl( kt ) |
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57 | !!---------------------------------------------------------------------- |
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58 | !! *** ROUTINE zdfmxl *** |
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59 | !! |
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60 | !! ** Purpose : Compute the turbocline depth and the mixed layer depth |
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61 | !! with density criteria. |
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62 | !! |
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63 | !! ** Method : The mixed layer depth is the shallowest W depth with |
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64 | !! the density of the corresponding T point (just bellow) bellow a |
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65 | !! given value defined locally as rho(10m) + zrho_c |
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66 | !! The turbocline depth is the depth at which the vertical |
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67 | !! eddy diffusivity coefficient (resulting from the vertical physics |
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68 | !! alone, not the isopycnal part, see trazdf.F) fall below a given |
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69 | !! value defined locally (avt_c here taken equal to 5 cm/s2) |
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70 | !! |
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71 | !! ** Action : nmln, hmld, hmlp, hmlpt |
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72 | !!---------------------------------------------------------------------- |
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73 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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74 | !! |
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75 | INTEGER :: ji, jj, jk ! dummy loop indices |
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76 | INTEGER :: iikn, iiki ! temporary integer within a do loop |
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77 | INTEGER, POINTER, DIMENSION(:,:) :: imld ! temporary workspace |
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78 | REAL(wp) :: zrho_c = 0.01_wp ! density criterion for mixed layer depth |
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79 | REAL(wp) :: zavt_c = 5.e-4_wp ! Kz criterion for the turbocline depth |
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80 | !!---------------------------------------------------------------------- |
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81 | ! |
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82 | IF( nn_timing == 1 ) CALL timing_start('zdf_mxl') |
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83 | ! |
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84 | CALL wrk_alloc( jpi,jpj, imld ) |
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85 | |
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86 | IF( kt == nit000 ) THEN |
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87 | IF(lwp) WRITE(numout,*) |
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88 | IF(lwp) WRITE(numout,*) 'zdf_mxl : mixed layer depth' |
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89 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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90 | ! ! allocate zdfmxl arrays |
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91 | IF( zdf_mxl_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'zdf_mxl : unable to allocate arrays' ) |
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92 | ENDIF |
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93 | |
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94 | ! w-level of the mixing and mixed layers |
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95 | nmln(:,:) = mbkt(:,:) + 1 ! Initialization to the number of w ocean point |
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96 | imld(:,:) = mbkt(:,:) + 1 |
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97 | DO jk = jpkm1, nlb10, -1 ! from the bottom to nlb10 |
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98 | DO jj = 1, jpj |
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99 | DO ji = 1, jpi |
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100 | IF( rhop(ji,jj,jk) > rhop(ji,jj,nla10) + zrho_c ) nmln(ji,jj) = jk ! Mixed layer |
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101 | IF( avt (ji,jj,jk) < zavt_c ) imld(ji,jj) = jk ! Turbocline |
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102 | END DO |
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103 | END DO |
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104 | END DO |
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105 | ! depth of the mixing and mixed layers |
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106 | DO jj = 1, jpj |
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107 | DO ji = 1, jpi |
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108 | iiki = imld(ji,jj) |
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109 | iikn = nmln(ji,jj) |
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110 | hmld (ji,jj) = fsdepw(ji,jj,iiki ) * tmask(ji,jj,1) ! Turbocline depth |
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111 | hmlp (ji,jj) = fsdepw(ji,jj,iikn ) * tmask(ji,jj,1) ! Mixed layer depth |
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112 | hmlpt(ji,jj) = fsdept(ji,jj,iikn-1) ! depth of the last T-point inside the mixed layer |
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113 | END DO |
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114 | END DO |
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115 | IF( .NOT.lk_offline ) THEN ! no need to output in offline mode |
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116 | CALL iom_put( "mldr10_1", hmlp ) ! mixed layer depth |
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117 | CALL iom_put( "mldkz5" , hmld ) ! turbocline depth |
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118 | ENDIF |
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119 | |
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120 | IF(ln_ctl) CALL prt_ctl( tab2d_1=REAL(nmln,wp), clinfo1=' nmln : ', tab2d_2=hmlp, clinfo2=' hmlp : ', ovlap=1 ) |
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121 | ! |
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122 | CALL wrk_dealloc( jpi,jpj, imld ) |
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123 | ! |
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124 | IF( nn_timing == 1 ) CALL timing_stop('zdf_mxl') |
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125 | ! |
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126 | END SUBROUTINE zdf_mxl |
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127 | |
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128 | !!====================================================================== |
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129 | END MODULE zdfmxl |
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