MODULE stopts !!============================================================================== !! *** MODULE stopts *** !! Stochastic parameterization: compute stochastic tracer fluctuations !!============================================================================== !! History : 3.3 ! 2011-12 (J.-M. Brankart) Original code !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! sto_pts : compute current stochastic tracer fluctuations !! sto_pts_init : initialisation for stochastic tracer fluctuations !!---------------------------------------------------------------------- USE dom_oce ! ocean space and time domain USE lbclnk ! lateral boundary conditions (or mpp link) USE phycst ! physical constants USE stopar ! stochastic parameterization IMPLICIT NONE PRIVATE PUBLIC sto_pts ! called by step.F90 PUBLIC sto_pts_init ! called by nemogcm.F90 ! Public array with random tracer fluctuations REAL(wp), PUBLIC, DIMENSION(:,:,:,:,:), ALLOCATABLE :: pts_ran !! * Substitutions # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id$ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE sto_pts( pts ) !!---------------------------------------------------------------------- !! *** ROUTINE sto_pts *** !! !! ** Purpose : Compute current stochastic tracer fluctuations !! !! ** Method : Compute tracer differences from a random walk !! around every model grid point !! !!---------------------------------------------------------------------- REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(inout) :: pts ! 1 : potential temperature [Celsius] ! ! 2 : salinity [psu] INTEGER :: ji, jj, jk, jts, jdof ! dummy loop indices INTEGER :: jim1, jjm1, jkm1 ! incremented indices INTEGER :: jip1, jjp1, jkp1 ! - - REAL(wp) :: zdtsim, zdtsjm, zdtskm ! temporary scalars REAL(wp) :: zdtsip, zdtsjp, zdtskp, zdts ! - - !!---------------------------------------------------------------------- DO jts = 1, jpts CALL lbc_lnk( 'stopts', pts(:,:,:,jts), 'T' , 1._wp ) ENDDO DO jdof = 1, nn_sto_eos DO jts = 1, jpts DO jk = 1, jpkm1 jkm1 = MAX(jk-1,1) ; jkp1 = MIN(jk+1,jpkm1) DO jj = 1, jpj jjm1 = MAX(jj-1,1) ; jjp1 = MIN(jj+1,jpj) DO ji = 1, jpi jim1 = MAX(ji-1,1) ; jip1 = MIN(ji+1,jpi) ! ! compute tracer gradient zdtsip = ( pts(jip1,jj,jk,jts) - pts(ji,jj,jk,jts) ) * tmask(jip1,jj,jk) zdtsim = ( pts(ji,jj,jk,jts) - pts(jim1,jj,jk,jts) ) * tmask(jim1,jj,jk) zdtsjp = ( pts(ji,jjp1,jk,jts) - pts(ji,jj,jk,jts) ) * tmask(ji,jjp1,jk) zdtsjm = ( pts(ji,jj,jk,jts) - pts(ji,jjm1,jk,jts) ) * tmask(ji,jjm1,jk) zdtskp = ( pts(ji,jj,jkp1,jts) - pts(ji,jj,jk,jts) ) * tmask(ji,jj,jkp1) zdtskm = ( pts(ji,jj,jk,jts) - pts(ji,jj,jkm1,jts) ) * tmask(ji,jj,jkm1) ! ! compute random tracer fluctuation (zdts) zdts = ( zdtsip + zdtsim ) * sto2d(ji,jj,jsto_eosi(jdof)) + & & ( zdtsjp + zdtsjm ) * sto2d(ji,jj,jsto_eosj(jdof)) + & & ( zdtskp + zdtskm ) * sto2d(ji,jj,jsto_eosk(jdof)) ! zdts = zdtsip * MAX(sto2d(ji,jj,jsto_eosi),0._wp) + & ! & zdtsim * MIN(sto2d(ji,jj,jsto_eosi),0._wp) + & ! & zdtsjp * MAX(sto2d(ji,jj,jsto_eosj),0._wp) + & ! & zdtsjm * MIN(sto2d(ji,jj,jsto_eosj),0._wp) + & ! & zdtskp * MAX(sto2d(ji,jj,jsto_eosk),0._wp) + & ! & zdtskm * MIN(sto2d(ji,jj,jsto_eosk),0._wp) zdts = zdts * tmask(ji,jj,jk) *SIN( gphit(ji,jj) * rad ) pts_ran(ji,jj,jk,jts,jdof) = zdts * 0.5_wp ! END DO END DO END DO END DO END DO ! Eliminate any possible negative salinity DO jdof = 1, nn_sto_eos DO jk = 1, jpkm1 DO jj = 1, jpj DO ji = 1, jpi pts_ran(ji,jj,jk,jp_sal,jdof) = MIN( ABS(pts_ran(ji,jj,jk,jp_sal,jdof)) , & & MAX(pts(ji,jj,jk,jp_sal),0._wp) ) & & * SIGN(1._wp,pts_ran(ji,jj,jk,jp_sal,jdof)) END DO END DO END DO END DO ! Eliminate any temperature lower than -2 degC ! DO jdof = 1, nn_sto_eos ! DO jk = 1, jpkm1 ! DO jj = 1, jpj ! DO ji = 1, jpi ! pts_ran(ji,jj,jk,jp_tem,jdof) = MIN( ABS(pts_ran(ji,jj,jk,jp_tem,jdof)) , & ! & MAX(pts(ji,jj,jk,jp_tem)+2._wp,0._wp) ) & ! & * SIGN(1._wp,pts_ran(ji,jj,jk,jp_tem,jdof)) ! END DO ! END DO ! END DO ! END DO ! Lateral boundary conditions on pts_ran DO jdof = 1, nn_sto_eos DO jts = 1, jpts CALL lbc_lnk( 'stopts', pts_ran(:,:,:,jts,jdof), 'T' , 1._wp ) END DO END DO END SUBROUTINE sto_pts SUBROUTINE sto_pts_init !!---------------------------------------------------------------------- !! *** ROUTINE sto_pts_init *** !! !! ** Purpose : Initialisation for stochastic tracer fluctuations !! !! ** Method : Allocate required array !! !!---------------------------------------------------------------------- ALLOCATE(pts_ran(jpi,jpj,jpk,jpts,nn_sto_eos)) END SUBROUTINE sto_pts_init END MODULE stopts