| [3] | 1 | MODULE tranpc |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE tranpc *** |
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| 4 | !! Ocean active tracers: non penetrative convection scheme |
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| 5 | !!============================================================================== |
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| [1537] | 6 | !! History : 1.0 ! 1990-09 (G. Madec) Original code |
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| 7 | !! ! 1996-01 (G. Madec) statement function for e3 |
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| 8 | !! NEMO 1.0 ! 2002-06 (G. Madec) free form F90 |
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| 9 | !! 3.0 ! 2008-06 (G. Madec) applied on ta, sa and called before tranxt in step.F90 |
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| [503] | 10 | !!---------------------------------------------------------------------- |
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| [3] | 11 | |
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| 12 | !!---------------------------------------------------------------------- |
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| [1537] | 13 | !! tra_npc : apply the non penetrative convection scheme |
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| [3] | 14 | !!---------------------------------------------------------------------- |
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| 15 | USE oce ! ocean dynamics and active tracers |
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| 16 | USE dom_oce ! ocean space and time domain |
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| [1537] | 17 | USE zdf_oce ! ocean vertical physics |
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| [216] | 18 | USE trdmod ! ocean active tracer trends |
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| 19 | USE trdmod_oce ! ocean variables trends |
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| [3] | 20 | USE eosbn2 ! equation of state (eos routine) |
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| 21 | USE lbclnk ! lateral boundary conditions (or mpp link) |
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| [216] | 22 | USE in_out_manager ! I/O manager |
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| [3] | 23 | |
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| 24 | IMPLICIT NONE |
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| 25 | PRIVATE |
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| 26 | |
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| [503] | 27 | PUBLIC tra_npc ! routine called by step.F90 |
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| [3] | 28 | |
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| 29 | !! * Substitutions |
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| 30 | # include "domzgr_substitute.h90" |
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| 31 | !!---------------------------------------------------------------------- |
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| [1537] | 32 | !! NEMO/OPA 3.2 , LOCEAN-IPSL (2009) |
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| [1146] | 33 | !! $Id$ |
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| [503] | 34 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| [3] | 35 | !!---------------------------------------------------------------------- |
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| 36 | |
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| 37 | CONTAINS |
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| 38 | |
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| 39 | SUBROUTINE tra_npc( kt ) |
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| 40 | !!---------------------------------------------------------------------- |
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| 41 | !! *** ROUTINE tranpc *** |
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| 42 | !! |
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| 43 | !! ** Purpose : Non penetrative convective adjustment scheme. solve |
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| [1111] | 44 | !! the static instability of the water column on after fields |
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| [3] | 45 | !! while conserving heat and salt contents. |
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| 46 | !! |
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| 47 | !! ** Method : The algorithm used converges in a maximium of jpk |
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| 48 | !! iterations. instabilities are treated when the vertical density |
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| 49 | !! gradient is less than 1.e-5. |
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| [503] | 50 | !! l_trdtra=T: the trend associated with this algorithm is saved. |
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| [3] | 51 | !! |
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| [1111] | 52 | !! ** Action : - (ta,sa) after the application od the npc scheme |
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| [3] | 53 | !! - save the associated trends (ttrd,strd) ('key_trdtra') |
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| 54 | !! |
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| [503] | 55 | !! References : Madec, et al., 1991, JPO, 21, 9, 1349-1371. |
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| 56 | !!---------------------------------------------------------------------- |
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| 57 | USE oce, ONLY : ztrdt => ua ! use ua as 3D workspace |
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| 58 | USE oce, ONLY : ztrds => va ! use va as 3D workspace |
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| 59 | !! |
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| 60 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| [3] | 61 | !! |
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| [503] | 62 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 63 | INTEGER :: inpcc ! number of statically instable water column |
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| 64 | INTEGER :: inpci ! number of iteration for npc scheme |
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| 65 | INTEGER :: jiter, jkdown, jkp ! ??? |
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| 66 | INTEGER :: ikbot, ik, ikup, ikdown ! ??? |
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| 67 | REAL(wp) :: ze3tot, zta, zsa, zraua, ze3dwn |
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| 68 | REAL(wp), DIMENSION(jpi,jpk) :: zwx, zwy, zwz ! 2D arrays |
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| 69 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zrhop ! 3D arrays |
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| [3] | 70 | !!---------------------------------------------------------------------- |
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| [216] | 71 | |
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| [1537] | 72 | IF( MOD( kt, nn_npc ) == 0 ) THEN |
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| [3] | 73 | |
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| 74 | inpcc = 0 |
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| 75 | inpci = 0 |
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| 76 | |
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| [1111] | 77 | CALL eos( ta, sa, rhd, zrhop ) ! Potential density |
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| [3] | 78 | |
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| 79 | |
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| [1111] | 80 | IF( l_trdtra ) THEN ! Save ta and sa trends |
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| 81 | ztrdt(:,:,:) = ta(:,:,:) |
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| 82 | ztrds(:,:,:) = sa(:,:,:) |
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| [216] | 83 | ENDIF |
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| 84 | |
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| [3] | 85 | ! ! =============== |
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| 86 | DO jj = 1, jpj ! Vertical slab |
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| 87 | ! ! =============== |
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| [503] | 88 | ! Static instability pointer |
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| 89 | ! ---------------------------- |
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| [3] | 90 | DO jk = 1, jpkm1 |
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| 91 | DO ji = 1, jpi |
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| 92 | zwx(ji,jk) = ( zrhop(ji,jj,jk) - zrhop(ji,jj,jk+1) ) * tmask(ji,jj,jk+1) |
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| 93 | END DO |
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| 94 | END DO |
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| 95 | |
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| 96 | ! 1.1 do not consider the boundary points |
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| 97 | |
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| 98 | ! even if east-west cyclic b. c. do not considere ji=1 or jpi |
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| 99 | DO jk = 1, jpkm1 |
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| 100 | zwx( 1 ,jk) = 0.e0 |
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| 101 | zwx(jpi,jk) = 0.e0 |
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| 102 | END DO |
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| 103 | ! even if south-symmetric b. c. used, do not considere jj=1 |
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| [503] | 104 | IF( jj == 1 ) zwx(:,:) = 0.e0 |
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| [3] | 105 | |
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| 106 | DO jk = 1, jpkm1 |
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| 107 | DO ji = 1, jpi |
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| 108 | zwx(ji,jk) = 1. |
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| [503] | 109 | IF( zwx(ji,jk) < 1.e-5 ) zwx(ji,jk) = 0.e0 |
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| [3] | 110 | END DO |
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| 111 | END DO |
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| 112 | |
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| [503] | 113 | zwy(:,1) = 0.e0 |
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| [3] | 114 | DO ji = 1, jpi |
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| 115 | DO jk = 1, jpkm1 |
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| 116 | zwy(ji,1) = zwy(ji,1) + zwx(ji,jk) |
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| 117 | END DO |
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| 118 | END DO |
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| 119 | |
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| [503] | 120 | zwz(1,1) = 0.e0 |
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| [3] | 121 | DO ji = 1, jpi |
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| 122 | zwz(1,1) = zwz(1,1) + zwy(ji,1) |
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| 123 | END DO |
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| 124 | |
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| 125 | inpcc = inpcc + NINT( zwz(1,1) ) |
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| 126 | |
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| 127 | |
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| 128 | ! 2. Vertical mixing for each instable portion of the density profil |
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| 129 | ! ------------------------------------------------------------------ |
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| 130 | |
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| [503] | 131 | IF( zwz(1,1) /= 0.e0 ) THEN ! -->> the density profil is statically instable : |
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| [3] | 132 | DO ji = 1, jpi |
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| [503] | 133 | IF( zwy(ji,1) /= 0.e0 ) THEN |
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| 134 | ! |
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| 135 | ikbot = mbathy(ji,jj) ! ikbot: ocean bottom level |
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| 136 | ! |
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| 137 | DO jiter = 1, jpk ! vertical iteration |
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| 138 | ! |
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| [3] | 139 | ! search of ikup : the first static instability from the sea surface |
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| [503] | 140 | ! |
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| [3] | 141 | ik = 0 |
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| 142 | 220 CONTINUE |
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| 143 | ik = ik + 1 |
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| 144 | IF( ik >= ikbot-1 ) GO TO 200 |
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| 145 | zwx(ji,ik) = zrhop(ji,jj,ik) - zrhop(ji,jj,ik+1) |
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| [503] | 146 | IF( zwx(ji,ik) <= 0.e0 ) GO TO 220 |
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| [3] | 147 | ikup = ik |
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| 148 | ! the density profil is instable below ikup |
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| 149 | ! ikdown : bottom of the instable portion of the density profil |
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| 150 | ! search of ikdown and vertical mixing from ikup to ikdown |
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| [503] | 151 | ! |
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| [3] | 152 | ze3tot= fse3t(ji,jj,ikup) |
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| [1111] | 153 | zta = ta (ji,jj,ikup) |
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| 154 | zsa = sa (ji,jj,ikup) |
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| [3] | 155 | zraua = zrhop(ji,jj,ikup) |
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| [503] | 156 | ! |
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| [3] | 157 | DO jkdown = ikup+1, ikbot-1 |
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| 158 | IF( zraua <= zrhop(ji,jj,jkdown) ) THEN |
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| 159 | ikdown = jkdown |
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| 160 | GO TO 240 |
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| 161 | ENDIF |
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| 162 | ze3dwn = fse3t(ji,jj,jkdown) |
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| 163 | ze3tot = ze3tot + ze3dwn |
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| [1111] | 164 | zta = ( zta*(ze3tot-ze3dwn) + ta(ji,jj,jkdown)*ze3dwn )/ze3tot |
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| 165 | zsa = ( zsa*(ze3tot-ze3dwn) + sa(ji,jj,jkdown)*ze3dwn )/ze3tot |
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| [3] | 166 | zraua = ( zraua*(ze3tot-ze3dwn) + zrhop(ji,jj,jkdown)*ze3dwn )/ze3tot |
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| 167 | inpci = inpci+1 |
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| 168 | END DO |
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| 169 | ikdown = ikbot-1 |
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| 170 | 240 CONTINUE |
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| [503] | 171 | ! |
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| [3] | 172 | DO jkp = ikup, ikdown-1 |
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| [1111] | 173 | ta(ji,jj,jkp) = zta |
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| 174 | sa(ji,jj,jkp) = zsa |
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| [3] | 175 | zrhop(ji,jj,jkp) = zraua |
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| 176 | END DO |
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| 177 | IF (ikdown == ikbot-1 .AND. zraua >= zrhop(ji,jj,ikdown) ) THEN |
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| [1111] | 178 | ta(ji,jj,ikdown) = zta |
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| 179 | sa(ji,jj,ikdown) = zsa |
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| [3] | 180 | zrhop(ji,jj,ikdown) = zraua |
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| 181 | ENDIF |
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| 182 | END DO |
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| 183 | ENDIF |
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| 184 | 200 CONTINUE |
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| 185 | END DO |
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| 186 | ! <<-- no more static instability on slab jj |
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| 187 | ENDIF |
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| 188 | ! ! =============== |
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| 189 | END DO ! End of slab |
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| 190 | ! ! =============== |
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| [503] | 191 | ! |
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| 192 | IF( l_trdtra ) THEN ! save the Non penetrative mixing trends for diagnostic |
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| [1111] | 193 | ztrdt(:,:,:) = ta(:,:,:) - ztrdt(:,:,:) |
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| 194 | ztrds(:,:,:) = sa(:,:,:) - ztrds(:,:,:) |
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| [503] | 195 | CALL trd_mod(ztrdt, ztrds, jptra_trd_npc, 'TRA', kt) |
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| [216] | 196 | ENDIF |
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| [3] | 197 | |
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| [1111] | 198 | ! Lateral boundary conditions on ( ta, sa ) ( Unchanged sign) |
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| [3] | 199 | ! ------------------------------============ |
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| [1111] | 200 | CALL lbc_lnk( ta, 'T', 1. ) |
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| 201 | CALL lbc_lnk( sa, 'T', 1. ) |
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| [3] | 202 | |
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| 203 | |
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| 204 | ! 2. non penetrative convective scheme statistics |
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| 205 | ! ----------------------------------------------- |
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| [1537] | 206 | IF( nn_npcp /= 0 .AND. MOD( kt, nn_npcp ) == 0 ) THEN |
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| [3] | 207 | IF(lwp) WRITE(numout,*)' kt=',kt, ' number of statically instable', & |
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| [503] | 208 | & ' water column : ',inpcc, ' number of iteration : ',inpci |
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| [3] | 209 | ENDIF |
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| [503] | 210 | ! |
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| [3] | 211 | ENDIF |
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| [503] | 212 | ! |
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| [3] | 213 | END SUBROUTINE tra_npc |
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| 214 | |
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| 215 | !!====================================================================== |
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| 216 | END MODULE tranpc |
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