[3] | 1 | MODULE diahth |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE diahth *** |
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| 4 | !! Ocean diagnostics: thermocline and 20 degree depth |
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| 5 | !!====================================================================== |
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| 6 | #if defined key_diahth || defined key_esopa |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | !! 'key_diahth' : thermocline depth diag. |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! dia_hth : Compute diagnostics associated with the thermocline |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! * Modules used |
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| 13 | USE oce ! ocean dynamics and tracers |
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| 14 | USE dom_oce ! ocean space and time domain |
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| 15 | USE phycst ! physical constants |
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| 16 | USE in_out_manager ! I/O manager |
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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 | !! * Routine accessibility |
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| 22 | PUBLIC dia_hth ! routine called by step.F90 |
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| 23 | |
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| 24 | !! * Shared module variables |
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[32] | 25 | LOGICAL , PUBLIC, PARAMETER :: lk_diahth = .TRUE. !: thermocline-20d depths flag |
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| 26 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj) :: & !: |
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| 27 | hth , & !: depth of the max vertical temperature gradient (m) |
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| 28 | hd20 , & !: depth of 20 C isotherm (m) |
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| 29 | hd28 , & !: depth of 28 C isotherm (m) |
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| 30 | htc3 !: heat content of first 300 m |
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[3] | 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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[247] | 35 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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[719] | 36 | !! $Header$ |
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[247] | 37 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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[3] | 38 | !!---------------------------------------------------------------------- |
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| 39 | |
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| 40 | CONTAINS |
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| 41 | |
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| 42 | SUBROUTINE dia_hth( kt ) |
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| 43 | !!--------------------------------------------------------------------- |
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| 44 | !! *** ROUTINE dia_hth *** |
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| 45 | !! |
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| 46 | !! ** Purpose : |
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| 47 | !! Computes the depth of strongest vertical temperature gradient |
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| 48 | !! Computes the depth of the 20 degree isotherm |
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| 49 | !! Computes the depth of the 28 degree isotherm |
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| 50 | !! Computes the heat content of first 300 m |
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| 51 | !! |
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| 52 | !! ** Method : |
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| 53 | !! |
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| 54 | !! History : |
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| 55 | !! ! 94-09 (J.-P. Boulanger) Original code |
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| 56 | !! ! 96-11 (E. Guilyardi) OPA8 |
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| 57 | !! ! 97-08 (G. Madec) optimization |
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| 58 | !! ! 99-07 (E. Guilyardi) hd28 + heat content |
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| 59 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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| 60 | !!------------------------------------------------------------------- |
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| 61 | !! * Arguments |
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| 62 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 63 | |
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| 64 | !! * Local declarations |
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| 65 | INTEGER :: ji, jj, jk ! dummy loop arguments |
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| 66 | INTEGER :: iid, iif, ilevel ! temporary integers |
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| 67 | INTEGER, DIMENSION(jpi) :: idepth |
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| 68 | INTEGER, DIMENSION(jpi,jpj) :: ikc |
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| 69 | |
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| 70 | REAL(wp) :: zd, zmoy ! temporary scalars |
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| 71 | REAL(wp), DIMENSION(jpi) :: zmax |
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| 72 | REAL(wp), DIMENSION(jpi,jpk) :: zdzt |
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| 73 | !!---------------------------------------------------------------------- |
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| 74 | |
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| 75 | IF( kt == nit000 ) THEN |
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| 76 | IF(lwp) WRITE(numout,*) |
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| 77 | IF(lwp) WRITE(numout,*) 'dia_hth : diagnostics of the thermocline depth' |
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| 78 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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| 79 | IF(lwp) WRITE(numout,*) |
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| 80 | ENDIF |
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| 81 | |
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| 82 | |
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| 83 | ! -------------------------- ! |
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| 84 | ! Depth of the thermocline ! |
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| 85 | ! -------------------------- ! |
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| 86 | ! The depth of the thermocline is defined as the depth of the |
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| 87 | ! strongest vertical temperature gradient |
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| 88 | |
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| 89 | DO jj = 1, jpj |
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| 90 | |
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| 91 | ! vertical gradient of temperature |
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| 92 | DO jk = 2, jpkm1 |
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| 93 | zdzt(:,jk) = ( tn(:,jj,jk-1) - tn(:,jj,jk) ) / fse3w(:,jj,jk) * tmask(:,jj,jk) |
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| 94 | END DO |
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| 95 | |
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| 96 | ! search the level of maximum vertical temperature gradient |
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| 97 | zmax (:) = 0.e0 |
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| 98 | idepth(:) = 1 |
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| 99 | DO jk = jpkm1, 2, -1 |
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| 100 | DO ji = 1, jpi |
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| 101 | IF( zdzt(ji,jk) > zmax(ji) ) THEN |
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| 102 | zmax (ji) = zdzt(ji,jk) |
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| 103 | idepth(ji) = jk |
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| 104 | ENDIF |
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| 105 | END DO |
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| 106 | END DO |
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| 107 | |
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| 108 | ! depth of the thermocline |
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| 109 | DO ji = 1, jpi |
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| 110 | hth(ji,jj) = fsdepw(ji,jj,idepth(ji)) |
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| 111 | END DO |
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| 112 | |
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| 113 | END DO |
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| 114 | |
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| 115 | |
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| 116 | ! ----------------------- ! |
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| 117 | ! Depth of 20C isotherm ! |
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| 118 | ! ----------------------- ! |
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| 119 | |
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| 120 | ! initialization to the number of ocean w-point mbathy |
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| 121 | ! (cf dommsk, minimum value: 1) |
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| 122 | ikc(:,:) = 1 |
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| 123 | |
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| 124 | ! search the depth of 20 degrees isotherm |
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| 125 | ! ( starting from the top, last level above 20C, if not exist, = 1) |
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| 126 | DO jk = 1, jpkm1 |
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| 127 | DO jj = 1, jpj |
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| 128 | DO ji = 1, jpi |
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| 129 | IF( tn(ji,jj,jk) >= 20. ) ikc(ji,jj) = jk |
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| 130 | END DO |
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| 131 | END DO |
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| 132 | END DO |
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| 133 | |
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| 134 | ! Depth of 20C isotherm |
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| 135 | DO jj = 1, jpj |
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| 136 | DO ji = 1, jpi |
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| 137 | iid = ikc(ji,jj) |
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| 138 | iif = mbathy(ji,jj) |
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| 139 | IF( iid /= 1 ) THEN |
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| 140 | ! linear interpolation |
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| 141 | zd = fsdept(ji,jj,iid) & |
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| 142 | + ( fsdept(ji,jj,iid+1) - fsdept(ji,jj,iid) ) & |
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| 143 | * ( 20.*tmask(ji,jj,iid+1) - tn(ji,jj,iid) ) & |
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| 144 | / ( tn(ji,jj,iid+1) - tn(ji,jj,iid) & |
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| 145 | + (1.-tmask(ji,jj,1)) ) |
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| 146 | ! bound by the ocean depth, minimum value, first T-point depth |
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| 147 | hd20(ji,jj) = MIN( zd*tmask(ji,jj,1), fsdepw(ji,jj,iif)) |
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| 148 | ELSE |
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| 149 | hd20(ji,jj)=0. |
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| 150 | ENDIF |
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| 151 | END DO |
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| 152 | END DO |
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| 153 | |
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| 154 | ! ----------------------- ! |
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| 155 | ! Depth of 28C isotherm ! |
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| 156 | ! ----------------------- ! |
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| 157 | |
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| 158 | ! initialization to the number of ocean w-point mbathy |
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| 159 | ! (cf dommsk, minimum value: 1) |
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| 160 | ikc(:,:) = 1 |
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| 161 | |
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| 162 | ! search the depth of 28 degrees isotherm |
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| 163 | ! ( starting from the top, last level above 28C, if not exist, = 1) |
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| 164 | DO jk = 1, jpkm1 |
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| 165 | DO jj = 1, jpj |
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| 166 | DO ji = 1, jpi |
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| 167 | IF( tn(ji,jj,jk) >= 28. ) ikc(ji,jj) = jk |
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| 168 | END DO |
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| 169 | END DO |
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| 170 | END DO |
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| 171 | |
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| 172 | ! Depth of 28C isotherm |
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| 173 | DO jj = 1, jpj |
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| 174 | DO ji = 1, jpi |
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| 175 | iid = ikc(ji,jj) |
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| 176 | iif = mbathy(ji,jj) |
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| 177 | IF( iid /= 1 ) THEN |
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| 178 | ! linear interpolation |
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| 179 | zd = fsdept(ji,jj,iid) & |
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| 180 | + ( fsdept(ji,jj,iid+1) - fsdept(ji,jj,iid) ) & |
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| 181 | * ( 28.*tmask(ji,jj,iid+1) - tn(ji,jj,iid) ) & |
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| 182 | / ( tn(ji,jj,iid+1) - tn(ji,jj,iid) & |
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| 183 | + ( 1. - tmask(ji,jj,1) ) ) |
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| 184 | ! bound by the ocean depth, minimum value, first T-point depth |
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| 185 | hd28(ji,jj) = MIN( zd*tmask(ji,jj,1), fsdepw(ji,jj,iif) ) |
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| 186 | ELSE |
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| 187 | hd28(ji,jj) = 0. |
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| 188 | ENDIF |
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| 189 | END DO |
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| 190 | END DO |
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| 191 | |
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| 192 | ! ----------------------------------------- ! |
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| 193 | ! Heat content of first 300 m (18 levels) ! |
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| 194 | ! ----------------------------------------- ! |
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| 195 | |
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| 196 | htc3(:,:) = 0.e0 |
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| 197 | ilevel = 18 |
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| 198 | zmoy = rau0 * rcp * 0.5 |
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| 199 | |
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| 200 | ! intregrate tn from surface to klevel |
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| 201 | |
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| 202 | DO jk = 1, ilevel |
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| 203 | htc3(:,:) = htc3(:,:) & |
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| 204 | + zmoy * ( tn(:,:,jk) + tn(:,:,jk+1) ) * fse3w(:,:,jk) * tmask(:,:,jk) |
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| 205 | END DO |
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| 206 | |
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| 207 | END SUBROUTINE dia_hth |
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| 208 | |
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| 209 | #else |
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| 210 | !!---------------------------------------------------------------------- |
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| 211 | !! Default option : Empty module |
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| 212 | !!---------------------------------------------------------------------- |
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[32] | 213 | LOGICAL , PUBLIC, PARAMETER :: lk_diahth = .FALSE. !: thermocline-20d depths flag |
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[3] | 214 | CONTAINS |
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| 215 | SUBROUTINE dia_hth( kt ) ! Empty routine |
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[32] | 216 | WRITE(*,*) 'dia_hth: You should not have seen this print! error?', kt |
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[3] | 217 | END SUBROUTINE dia_hth |
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| 218 | #endif |
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| 219 | |
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| 220 | !!====================================================================== |
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| 221 | END MODULE diahth |
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