[5329] | 1 | MODULE stopts |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE stopts *** |
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| 4 | !! Stochastic parameterization: compute stochastic tracer fluctuations |
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| 5 | !!============================================================================== |
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| 6 | !! History : 3.3 ! 2011-12 (J.-M. Brankart) Original code |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! sto_pts : compute current stochastic tracer fluctuations |
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| 11 | !! sto_pts_init : initialisation for stochastic tracer fluctuations |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | USE dom_oce ! ocean space and time domain |
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| 14 | USE lbclnk ! lateral boundary conditions (or mpp link) |
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| 15 | USE phycst ! physical constants |
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| 16 | USE stopar ! stochastic parameterization |
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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 sto_pts ! called by step.F90 |
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| 22 | PUBLIC sto_pts_init ! called by nemogcm.F90 |
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| 23 | |
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| 24 | ! Public array with random tracer fluctuations |
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| 25 | REAL(wp), PUBLIC, DIMENSION(:,:,:,:,:), ALLOCATABLE :: pts_ran |
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| 26 | |
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| 27 | !! * Substitutions |
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[12377] | 28 | # include "do_loop_substitute.h90" |
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[5329] | 29 | !!---------------------------------------------------------------------- |
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[9598] | 30 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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[10069] | 31 | !! $Id$ |
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[10068] | 32 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[5329] | 33 | !!---------------------------------------------------------------------- |
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| 34 | CONTAINS |
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| 35 | |
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| 36 | SUBROUTINE sto_pts( pts ) |
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| 37 | !!---------------------------------------------------------------------- |
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| 38 | !! *** ROUTINE sto_pts *** |
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| 39 | !! |
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| 40 | !! ** Purpose : Compute current stochastic tracer fluctuations |
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| 41 | !! |
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| 42 | !! ** Method : Compute tracer differences from a random walk |
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| 43 | !! around every model grid point |
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| 44 | !! |
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| 45 | !!---------------------------------------------------------------------- |
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| 46 | REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(inout) :: pts ! 1 : potential temperature [Celsius] |
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| 47 | ! ! 2 : salinity [psu] |
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| 48 | INTEGER :: ji, jj, jk, jts, jdof ! dummy loop indices |
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| 49 | INTEGER :: jim1, jjm1, jkm1 ! incremented indices |
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| 50 | INTEGER :: jip1, jjp1, jkp1 ! - - |
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| 51 | REAL(wp) :: zdtsim, zdtsjm, zdtskm ! temporary scalars |
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| 52 | REAL(wp) :: zdtsip, zdtsjp, zdtskp, zdts ! - - |
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| 53 | !!---------------------------------------------------------------------- |
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| 54 | |
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| 55 | DO jts = 1, jpts |
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[10425] | 56 | CALL lbc_lnk( 'stopts', pts(:,:,:,jts), 'T' , 1._wp ) |
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[5329] | 57 | ENDDO |
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| 58 | |
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| 59 | DO jdof = 1, nn_sto_eos |
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| 60 | DO jts = 1, jpts |
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| 61 | DO jk = 1, jpkm1 |
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| 62 | jkm1 = MAX(jk-1,1) ; jkp1 = MIN(jk+1,jpkm1) |
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| 63 | DO jj = 1, jpj |
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| 64 | jjm1 = MAX(jj-1,1) ; jjp1 = MIN(jj+1,jpj) |
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| 65 | DO ji = 1, jpi |
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| 66 | jim1 = MAX(ji-1,1) ; jip1 = MIN(ji+1,jpi) |
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| 67 | ! |
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| 68 | ! compute tracer gradient |
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| 69 | zdtsip = ( pts(jip1,jj,jk,jts) - pts(ji,jj,jk,jts) ) * tmask(jip1,jj,jk) |
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| 70 | zdtsim = ( pts(ji,jj,jk,jts) - pts(jim1,jj,jk,jts) ) * tmask(jim1,jj,jk) |
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| 71 | zdtsjp = ( pts(ji,jjp1,jk,jts) - pts(ji,jj,jk,jts) ) * tmask(ji,jjp1,jk) |
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| 72 | zdtsjm = ( pts(ji,jj,jk,jts) - pts(ji,jjm1,jk,jts) ) * tmask(ji,jjm1,jk) |
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| 73 | zdtskp = ( pts(ji,jj,jkp1,jts) - pts(ji,jj,jk,jts) ) * tmask(ji,jj,jkp1) |
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| 74 | zdtskm = ( pts(ji,jj,jk,jts) - pts(ji,jj,jkm1,jts) ) * tmask(ji,jj,jkm1) |
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| 75 | ! |
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| 76 | ! compute random tracer fluctuation (zdts) |
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| 77 | zdts = ( zdtsip + zdtsim ) * sto2d(ji,jj,jsto_eosi(jdof)) + & |
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| 78 | & ( zdtsjp + zdtsjm ) * sto2d(ji,jj,jsto_eosj(jdof)) + & |
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| 79 | & ( zdtskp + zdtskm ) * sto2d(ji,jj,jsto_eosk(jdof)) |
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| 80 | ! zdts = zdtsip * MAX(sto2d(ji,jj,jsto_eosi),0._wp) + & |
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| 81 | ! & zdtsim * MIN(sto2d(ji,jj,jsto_eosi),0._wp) + & |
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| 82 | ! & zdtsjp * MAX(sto2d(ji,jj,jsto_eosj),0._wp) + & |
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| 83 | ! & zdtsjm * MIN(sto2d(ji,jj,jsto_eosj),0._wp) + & |
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| 84 | ! & zdtskp * MAX(sto2d(ji,jj,jsto_eosk),0._wp) + & |
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| 85 | ! & zdtskm * MIN(sto2d(ji,jj,jsto_eosk),0._wp) |
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| 86 | zdts = zdts * tmask(ji,jj,jk) *SIN( gphit(ji,jj) * rad ) |
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| 87 | pts_ran(ji,jj,jk,jts,jdof) = zdts * 0.5_wp |
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| 88 | ! |
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| 89 | END DO |
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| 90 | END DO |
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| 91 | END DO |
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| 92 | END DO |
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| 93 | END DO |
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| 94 | |
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| 95 | ! Eliminate any possible negative salinity |
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| 96 | DO jdof = 1, nn_sto_eos |
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[12377] | 97 | DO_3D_11_11( 1, jpkm1 ) |
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| 98 | pts_ran(ji,jj,jk,jp_sal,jdof) = MIN( ABS(pts_ran(ji,jj,jk,jp_sal,jdof)) , & |
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| 99 | & MAX(pts(ji,jj,jk,jp_sal),0._wp) ) & |
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| 100 | & * SIGN(1._wp,pts_ran(ji,jj,jk,jp_sal,jdof)) |
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| 101 | END_3D |
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[5329] | 102 | END DO |
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| 103 | |
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| 104 | ! Eliminate any temperature lower than -2 degC |
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| 105 | ! DO jdof = 1, nn_sto_eos |
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| 106 | ! DO jk = 1, jpkm1 |
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| 107 | ! DO jj = 1, jpj |
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| 108 | ! DO ji = 1, jpi |
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| 109 | ! pts_ran(ji,jj,jk,jp_tem,jdof) = MIN( ABS(pts_ran(ji,jj,jk,jp_tem,jdof)) , & |
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| 110 | ! & MAX(pts(ji,jj,jk,jp_tem)+2._wp,0._wp) ) & |
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| 111 | ! & * SIGN(1._wp,pts_ran(ji,jj,jk,jp_tem,jdof)) |
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| 112 | ! END DO |
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| 113 | ! END DO |
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| 114 | ! END DO |
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| 115 | ! END DO |
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| 116 | |
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| 117 | |
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| 118 | ! Lateral boundary conditions on pts_ran |
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| 119 | DO jdof = 1, nn_sto_eos |
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| 120 | DO jts = 1, jpts |
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[10425] | 121 | CALL lbc_lnk( 'stopts', pts_ran(:,:,:,jts,jdof), 'T' , 1._wp ) |
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[5329] | 122 | END DO |
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| 123 | END DO |
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| 124 | |
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| 125 | END SUBROUTINE sto_pts |
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| 126 | |
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| 127 | |
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| 128 | SUBROUTINE sto_pts_init |
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| 129 | !!---------------------------------------------------------------------- |
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| 130 | !! *** ROUTINE sto_pts_init *** |
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| 131 | !! |
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| 132 | !! ** Purpose : Initialisation for stochastic tracer fluctuations |
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| 133 | !! |
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| 134 | !! ** Method : Allocate required array |
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| 135 | !! |
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| 136 | !!---------------------------------------------------------------------- |
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| 137 | |
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| 138 | ALLOCATE(pts_ran(jpi,jpj,jpk,jpts,nn_sto_eos)) |
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| 139 | |
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| 140 | END SUBROUTINE sto_pts_init |
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| 141 | |
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| 142 | END MODULE stopts |
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