| 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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| 6 | !! History : 1.0 ! 90-09 (G. Madec) Original code |
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| 7 | !! ! 91-11 (G. Madec) |
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| 8 | !! ! 92-06 (M. Imbard) periodic conditions on t and s |
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| 9 | !! ! 93-03 (M. Guyon) symetrical conditions |
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| 10 | !! ! 96-01 (G. Madec) statement function for e3 |
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| 11 | !! suppression of common work arrays |
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| 12 | !! 8.5 ! 02-06 (G. Madec) free form F90 |
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| 13 | !! 9.0 ! 08-06 (G. Madec) applied on ta, sa and called before tranxt in step.F90 |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | !! tra_npc : apply the non penetrative convection scheme |
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| 18 | !! tra_npc_init : initialization and control of the scheme |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | USE oce ! ocean dynamics and active tracers |
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| 21 | USE dom_oce ! ocean space and time domain |
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| 22 | USE trdmod ! ocean active tracer trends |
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| 23 | USE trdmod_oce ! ocean variables trends |
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| 24 | USE eosbn2 ! equation of state (eos routine) |
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| 25 | USE lbclnk ! lateral boundary conditions (or mpp link) |
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| 26 | USE in_out_manager ! I/O manager |
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| 27 | |
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| 28 | IMPLICIT NONE |
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| 29 | PRIVATE |
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| 30 | |
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| 31 | PUBLIC tra_npc ! routine called by step.F90 |
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| 32 | |
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| 33 | !!* Namelist namnpc: non penetrative convection algorithm |
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| 34 | INTEGER :: nnpc1 = 1 ! nnpc1 non penetrative convective scheme frequency |
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| 35 | INTEGER :: nnpc2 = 15 ! nnpc2 non penetrative convective scheme print frequency |
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| 36 | |
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| 37 | !! * Substitutions |
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| 38 | # include "domzgr_substitute.h90" |
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| 39 | !!---------------------------------------------------------------------- |
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| 40 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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| 41 | !! $Id:$ |
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| 42 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 43 | !!---------------------------------------------------------------------- |
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| 44 | |
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| 45 | CONTAINS |
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| 46 | |
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| 47 | SUBROUTINE tra_npc( kt ) |
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| 48 | !!---------------------------------------------------------------------- |
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| 49 | !! *** ROUTINE tranpc *** |
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| 50 | !! |
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| 51 | !! ** Purpose : Non penetrative convective adjustment scheme. solve |
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| 52 | !! the static instability of the water column on after fields |
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| 53 | !! while conserving heat and salt contents. |
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| 54 | !! |
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| 55 | !! ** Method : The algorithm used converges in a maximium of jpk |
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| 56 | !! iterations. instabilities are treated when the vertical density |
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| 57 | !! gradient is less than 1.e-5. |
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| 58 | !! l_trdtra=T: the trend associated with this algorithm is saved. |
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| 59 | !! |
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| 60 | !! ** Action : - (ta,sa) after the application od the npc scheme |
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| 61 | !! - save the associated trends (ttrd,strd) ('key_trdtra') |
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| 62 | !! |
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| 63 | !! References : Madec, et al., 1991, JPO, 21, 9, 1349-1371. |
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| 64 | !!---------------------------------------------------------------------- |
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| 65 | USE oce, ONLY : ztrdt => ua ! use ua as 3D workspace |
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| 66 | USE oce, ONLY : ztrds => va ! use va as 3D workspace |
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| 67 | !! |
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| 68 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| 69 | !! |
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| 70 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 71 | INTEGER :: inpcc ! number of statically instable water column |
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| 72 | INTEGER :: inpci ! number of iteration for npc scheme |
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| 73 | INTEGER :: jiter, jkdown, jkp ! ??? |
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| 74 | INTEGER :: ikbot, ik, ikup, ikdown ! ??? |
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| 75 | REAL(wp) :: ze3tot, zta, zsa, zraua, ze3dwn |
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| 76 | REAL(wp), DIMENSION(jpi,jpk) :: zwx, zwy, zwz ! 2D arrays |
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| 77 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zrhop ! 3D arrays |
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| 78 | !!---------------------------------------------------------------------- |
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| 79 | |
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| 80 | IF( kt == nit000 ) CALL tra_npc_init ! Initialisation |
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| 81 | |
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| 82 | IF( MOD( kt, nnpc1 ) == 0 ) THEN |
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| 83 | |
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| 84 | inpcc = 0 |
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| 85 | inpci = 0 |
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| 86 | |
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| 87 | CALL eos( ta, sa, rhd, zrhop ) ! Potential density |
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| 88 | |
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| 89 | |
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| 90 | IF( l_trdtra ) THEN ! Save ta and sa trends |
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| 91 | ztrdt(:,:,:) = ta(:,:,:) |
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| 92 | ztrds(:,:,:) = sa(:,:,:) |
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| 93 | ENDIF |
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| 94 | |
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| 95 | ! ! =============== |
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| 96 | DO jj = 1, jpj ! Vertical slab |
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| 97 | ! ! =============== |
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| 98 | ! Static instability pointer |
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| 99 | ! ---------------------------- |
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| 100 | DO jk = 1, jpkm1 |
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| 101 | DO ji = 1, jpi |
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| 102 | zwx(ji,jk) = ( zrhop(ji,jj,jk) - zrhop(ji,jj,jk+1) ) * tmask(ji,jj,jk+1) |
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| 103 | END DO |
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| 104 | END DO |
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| 105 | |
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| 106 | ! 1.1 do not consider the boundary points |
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| 107 | |
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| 108 | ! even if east-west cyclic b. c. do not considere ji=1 or jpi |
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| 109 | DO jk = 1, jpkm1 |
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| 110 | zwx( 1 ,jk) = 0.e0 |
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| 111 | zwx(jpi,jk) = 0.e0 |
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| 112 | END DO |
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| 113 | ! even if south-symmetric b. c. used, do not considere jj=1 |
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| 114 | IF( jj == 1 ) zwx(:,:) = 0.e0 |
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| 115 | |
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| 116 | DO jk = 1, jpkm1 |
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| 117 | DO ji = 1, jpi |
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| 118 | zwx(ji,jk) = 1. |
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| 119 | IF( zwx(ji,jk) < 1.e-5 ) zwx(ji,jk) = 0.e0 |
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| 120 | END DO |
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| 121 | END DO |
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| 122 | |
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| 123 | zwy(:,1) = 0.e0 |
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| 124 | DO ji = 1, jpi |
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| 125 | DO jk = 1, jpkm1 |
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| 126 | zwy(ji,1) = zwy(ji,1) + zwx(ji,jk) |
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| 127 | END DO |
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| 128 | END DO |
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| 129 | |
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| 130 | zwz(1,1) = 0.e0 |
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| 131 | DO ji = 1, jpi |
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| 132 | zwz(1,1) = zwz(1,1) + zwy(ji,1) |
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| 133 | END DO |
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| 134 | |
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| 135 | inpcc = inpcc + NINT( zwz(1,1) ) |
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| 136 | |
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| 137 | |
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| 138 | ! 2. Vertical mixing for each instable portion of the density profil |
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| 139 | ! ------------------------------------------------------------------ |
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| 140 | |
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| 141 | IF( zwz(1,1) /= 0.e0 ) THEN ! -->> the density profil is statically instable : |
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| 142 | DO ji = 1, jpi |
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| 143 | IF( zwy(ji,1) /= 0.e0 ) THEN |
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| 144 | ! |
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| 145 | ikbot = mbathy(ji,jj) ! ikbot: ocean bottom level |
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| 146 | ! |
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| 147 | DO jiter = 1, jpk ! vertical iteration |
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| 148 | ! |
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| 149 | ! search of ikup : the first static instability from the sea surface |
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| 150 | ! |
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| 151 | ik = 0 |
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| 152 | 220 CONTINUE |
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| 153 | ik = ik + 1 |
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| 154 | IF( ik >= ikbot-1 ) GO TO 200 |
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| 155 | zwx(ji,ik) = zrhop(ji,jj,ik) - zrhop(ji,jj,ik+1) |
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| 156 | IF( zwx(ji,ik) <= 0.e0 ) GO TO 220 |
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| 157 | ikup = ik |
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| 158 | ! the density profil is instable below ikup |
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| 159 | ! ikdown : bottom of the instable portion of the density profil |
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| 160 | ! search of ikdown and vertical mixing from ikup to ikdown |
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| 161 | ! |
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| 162 | ze3tot= fse3t(ji,jj,ikup) |
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| 163 | zta = ta (ji,jj,ikup) |
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| 164 | zsa = sa (ji,jj,ikup) |
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| 165 | zraua = zrhop(ji,jj,ikup) |
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| 166 | ! |
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| 167 | DO jkdown = ikup+1, ikbot-1 |
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| 168 | IF( zraua <= zrhop(ji,jj,jkdown) ) THEN |
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| 169 | ikdown = jkdown |
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| 170 | GO TO 240 |
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| 171 | ENDIF |
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| 172 | ze3dwn = fse3t(ji,jj,jkdown) |
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| 173 | ze3tot = ze3tot + ze3dwn |
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| 174 | zta = ( zta*(ze3tot-ze3dwn) + ta(ji,jj,jkdown)*ze3dwn )/ze3tot |
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| 175 | zsa = ( zsa*(ze3tot-ze3dwn) + sa(ji,jj,jkdown)*ze3dwn )/ze3tot |
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| 176 | zraua = ( zraua*(ze3tot-ze3dwn) + zrhop(ji,jj,jkdown)*ze3dwn )/ze3tot |
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| 177 | inpci = inpci+1 |
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| 178 | END DO |
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| 179 | ikdown = ikbot-1 |
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| 180 | 240 CONTINUE |
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| 181 | ! |
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| 182 | DO jkp = ikup, ikdown-1 |
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| 183 | ta(ji,jj,jkp) = zta |
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| 184 | sa(ji,jj,jkp) = zsa |
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| 185 | zrhop(ji,jj,jkp) = zraua |
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| 186 | END DO |
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| 187 | IF (ikdown == ikbot-1 .AND. zraua >= zrhop(ji,jj,ikdown) ) THEN |
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| 188 | ta(ji,jj,ikdown) = zta |
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| 189 | sa(ji,jj,ikdown) = zsa |
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| 190 | zrhop(ji,jj,ikdown) = zraua |
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| 191 | ENDIF |
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| 192 | END DO |
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| 193 | ENDIF |
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| 194 | 200 CONTINUE |
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| 195 | END DO |
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| 196 | ! <<-- no more static instability on slab jj |
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| 197 | ENDIF |
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| 198 | ! ! =============== |
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| 199 | END DO ! End of slab |
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| 200 | ! ! =============== |
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| 201 | ! |
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| 202 | IF( l_trdtra ) THEN ! save the Non penetrative mixing trends for diagnostic |
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| 203 | ztrdt(:,:,:) = ta(:,:,:) - ztrdt(:,:,:) |
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| 204 | ztrds(:,:,:) = sa(:,:,:) - ztrds(:,:,:) |
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| 205 | CALL trd_mod(ztrdt, ztrds, jptra_trd_npc, 'TRA', kt) |
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| 206 | ENDIF |
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| 207 | |
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| 208 | ! Lateral boundary conditions on ( ta, sa ) ( Unchanged sign) |
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| 209 | ! ------------------------------============ |
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| 210 | CALL lbc_lnk( ta, 'T', 1. ) |
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| 211 | CALL lbc_lnk( sa, 'T', 1. ) |
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| 212 | |
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| 213 | |
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| 214 | ! 2. non penetrative convective scheme statistics |
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| 215 | ! ----------------------------------------------- |
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| 216 | IF( nnpc2 /= 0 .AND. MOD( kt, nnpc2 ) == 0 ) THEN |
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| 217 | IF(lwp) WRITE(numout,*)' kt=',kt, ' number of statically instable', & |
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| 218 | & ' water column : ',inpcc, ' number of iteration : ',inpci |
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| 219 | ENDIF |
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| 220 | ! |
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| 221 | ENDIF |
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| 222 | ! |
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| 223 | END SUBROUTINE tra_npc |
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| 224 | |
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| 225 | |
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| 226 | SUBROUTINE tra_npc_init |
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| 227 | !!---------------------------------------------------------------------- |
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| 228 | !! *** ROUTINE tra_npc_init *** |
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| 229 | !! |
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| 230 | !! ** Purpose : initializations of the non-penetrative adjustment scheme |
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| 231 | !!---------------------------------------------------------------------- |
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| 232 | NAMELIST/namnpc/ nnpc1, nnpc2 |
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| 233 | ! |
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| 234 | REWIND( numnam ) ! Namelist namzdf : vertical diffusion |
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| 235 | READ ( numnam, namnpc ) |
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| 236 | ! |
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| 237 | IF(lwp) THEN ! Namelist print |
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| 238 | WRITE(numout,*) |
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| 239 | WRITE(numout,*) 'tra_npc_init : Non Penetrative Convection (npc) scheme' |
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| 240 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 241 | WRITE(numout,*) ' Namelist namnpc : set npc scheme parameters' |
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| 242 | WRITE(numout,*) ' npc scheme frequency nnpc1 = ', nnpc1 |
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| 243 | WRITE(numout,*) ' npc scheme print frequency nnpc2 = ', nnpc2 |
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| 244 | ENDIF |
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| 245 | ! |
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| 246 | IF ( nnpc1 == 0 ) THEN ! Parameter controls |
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| 247 | IF(lwp) WRITE(numout,cform_war) |
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| 248 | IF(lwp) WRITE(numout,*) ' nnpc1 = ', nnpc1, ' is forced to 1' |
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| 249 | nnpc1 = 1 |
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| 250 | nwarn = nwarn + 1 |
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| 251 | ENDIF |
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| 252 | ! |
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| 253 | END SUBROUTINE tra_npc_init |
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| 254 | |
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| 255 | !!====================================================================== |
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| 256 | END MODULE tranpc |
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