MODULE traadv_cen2 !!====================================================================== !! *** MODULE traadv_cen2 *** !! Ocean tracers: horizontal & vertical advective trend !!====================================================================== !! History : OPA ! 2001-08 (G. Madec, E. Durand) v8.2 trahad+trazad=traadv !! NEMO 1.0 ! 2002-06 (G. Madec) F90: Free form and module !! - ! 2004-08 (C. Talandier) New trends organization !! - ! 2005-11 (V. Garnier) Surface pressure gradient organization !! 2.0 ! 2006-04 (R. Benshila, G. Madec) Step reorganization !! - ! 2006-07 (G. madec) add ups_orca_set routine !! 3.2 ! 2009-07 (G. Madec) add avmb, avtb in restart for cen2 advection !! 3.3 ! 2010-05 (C. Ethe, G. Madec) merge TRC-TRA + switch from velocity to transport !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! tra_adv_cen2 : update the tracer trend with the advection trends using a 2nd order centered scheme !! ups_orca_set : allow mixed upstream/centered scheme in specific area (set for orca 2 and 4 only) !!---------------------------------------------------------------------- USE oce, ONLY: tsn ! now ocean temperature and salinity USE dom_oce ! ocean space and time domain USE eosbn2 ! equation of state USE trd_oce ! trends: ocean variables USE trdtra ! trends manager: tracers USE closea ! closed sea USE sbcrnf ! river runoffs USE in_out_manager ! I/O manager USE iom ! IOM library USE diaptr ! poleward transport diagnostics USE zdf_oce ! ocean vertical physics USE trc_oce ! share passive tracers/Ocean variables USE lib_mpp ! MPP library USE wrk_nemo ! Memory Allocation USE timing ! Timing USE phycst IMPLICIT NONE PRIVATE PUBLIC tra_adv_cen2 ! routine called by traadv.F90 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: upsmsk !: mixed upstream/centered scheme near some straits ! ! and in closed seas (orca 2 and 4 configurations) !! * Substitutions # include "domzgr_substitute.h90" # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/OPA 3.3 , NEMO Consortium (2010) !! $Id: traadv_cen2.F90 5540 2015-07-02 15:11:23Z jchanut $ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE tra_adv_cen2( kt, kit000, cdtype, pun, pvn, pwn, & & ptb, ptn, pta, kjpt ) !!---------------------------------------------------------------------- !! *** ROUTINE tra_adv_cen2 *** !! !! ** Purpose : Compute the now trend due to the advection of tracers !! and add it to the general trend of passive tracer equations. !! !! ** Method : The advection is evaluated by a second order centered !! scheme using now fields (leap-frog scheme). In specific areas !! (vicinity of major river mouths, some straits, or where tn is !! approaching the freezing point) it is mixed with an upstream !! scheme for stability reasons. !! Part 0 : compute the upstream / centered flag !! (3D array, zind, defined at T-point (00 or <0] !! zupsv = e1v*e3v vn (ptb(j) or ptb(j-1) ) [vn>0 or <0] !! * mixed upstream / centered horizontal advection scheme !! zcofi = max(zind(i+1), zind(i)) !! zcofj = max(zind(j+1), zind(j)) !! zwx = zcofi * zupsu + (1-zcofi) * zcenu !! zwy = zcofj * zupsv + (1-zcofj) * zcenv !! * horizontal advective trend (divergence of the fluxes) !! ztra = 1/(e1t*e2t*e3t) { di-1[zwx] + dj-1[zwy] } !! * Add this trend now to the general trend of tracer (ta,sa): !! pta = pta + ztra !! * trend diagnostic (l_trdtra=T or l_trctra=T): the trend is !! saved for diagnostics. The trends saved is expressed as !! Uh.gradh(T), i.e. save trend = ztra + ptn divn !! !! Part II : vertical advection !! For temperature (idem for salinity) the advective trend is com- !! puted as follows : !! ztra = 1/e3t dk+1[ zwz ] !! where the vertical advective flux, zwz, is given by : !! zwz = zcofk * zupst + (1-zcofk) * zcent !! with !! zupsv = upstream flux = wn * (ptb(k) or ptb(k-1) ) [wn>0 or <0] !! zcenu = centered flux = wn * mk(tn) !! The surface boundary condition is : !! variable volume (lk_vvl = T) : zero advective flux !! lin. free-surf (lk_vvl = F) : wn(:,:,1) * ptn(:,:,1) !! Add this trend now to the general trend of tracer (ta,sa): !! pta = pta + ztra !! Trend diagnostic (l_trdtra=T or l_trctra=T): the trend is !! saved for diagnostics. The trends saved is expressed as : !! save trend = w.gradz(T) = ztra - ptn divn. !! !! ** Action : - update pta with the now advective tracer trends !! - save trends if needed !!---------------------------------------------------------------------- INTEGER , INTENT(in ) :: kt ! ocean time-step index INTEGER , INTENT(in ) :: kit000 ! first time step index CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) INTEGER , INTENT(in ) :: kjpt ! number of tracers REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pun, pvn, pwn ! 3 ocean velocity components REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb, ptn ! before and now tracer fields REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend ! INTEGER :: ji, jj, jk, jn, ikt ! dummy loop indices INTEGER :: ierr ! local integer REAL(wp) :: zbtr, ztra ! local scalars REAL(wp) :: zfp_ui, zfp_vj, zfp_w, zcofi ! - - REAL(wp) :: zfm_ui, zfm_vj, zfm_w, zcofj, zcofk ! - - REAL(wp) :: zupsut, zcenut, zupst ! - - REAL(wp) :: zupsvt, zcenvt, zcent, zice ! - - REAL(wp), POINTER, DIMENSION(:,:) :: zfzp, zpres ! 2D workspace REAL(wp), POINTER, DIMENSION(:,:,:) :: zwx, zwy ! 3D - REAL(wp), POINTER, DIMENSION(:,:,:) :: zwz, zind ! - - !!---------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('tra_adv_cen2') ! CALL wrk_alloc( jpi, jpj, zpres, zfzp ) CALL wrk_alloc( jpi, jpj, jpk, zwx, zwy, zwz, zind ) ! IF( kt == kit000 ) THEN IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'tra_adv_cen2 : 2nd order centered advection scheme on ', cdtype IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~ ' IF(lwp) WRITE(numout,*) ! IF( .NOT. ALLOCATED( upsmsk ) ) THEN ALLOCATE( upsmsk(jpi,jpj), STAT=ierr ) IF( ierr /= 0 ) CALL ctl_stop('STOP', 'tra_adv_cen2: unable to allocate array') ENDIF ! upsmsk(:,:) = 0._wp ! not upstream by default ! IF( cp_cfg == "orca" ) CALL ups_orca_set ! set mixed Upstream/centered scheme near some straits ! ! and in closed seas (orca2 and orca4 only) IF( jp_cfg == 2 .AND. .NOT. ln_rstart ) THEN ! Increase the background in the surface layers avmb(1) = 10. * avmb(1) ; avtb(1) = 10. * avtb(1) avmb(2) = 10. * avmb(2) ; avtb(2) = 10. * avtb(2) avmb(3) = 5. * avmb(3) ; avtb(3) = 5. * avtb(3) avmb(4) = 2.5 * avmb(4) ; avtb(4) = 2.5 * avtb(4) ENDIF ENDIF ! ! Upstream / centered scheme indicator ! ------------------------------------ !!gm not strickly exact : the freezing point should be computed at each ocean levels... !!gm not a big deal since cen2 is no more used in global ice-ocean simulations !!ch changes for ice shelf to retain standard behaviour elsewhere, even if not optimal DO jj = 1, jpj DO ji = 1, jpi ikt = mikt(ji,jj) IF (ikt > 1 ) THEN zpres(ji,jj) = grav * rau0 * fsdept(ji,jj,ikt) * 1.e-04 ELSE zpres(ji,jj) = 0.0 ENDIF END DO END DO CALL eos_fzp( tsn(:,:,1,jp_sal), zfzp(:,:), zpres(:,:) ) DO jk = 1, jpk DO jj = 1, jpj DO ji = 1, jpi ! ! below ice covered area (if tn < "freezing"+0.1 ) IF( tsn(ji,jj,jk,jp_tem) <= zfzp(ji,jj) + 0.1 ) THEN ; zice = 1._wp ELSE ; zice = 0._wp ENDIF zind(ji,jj,jk) = MAX ( & rnfmsk(ji,jj) * rnfmsk_z(jk), & ! near runoff mouths (& closed sea outflows) upsmsk(ji,jj) , & ! some of some straits zice & ! below ice covered area (if tn < "freezing"+0.1 ) & ) * tmask(ji,jj,jk) END DO END DO END DO DO jn = 1, kjpt ! ! I. Horizontal advection ! ==================== ! DO jk = 1, jpkm1 ! ! Second order centered tracer flux at u- and v-points DO jj = 1, jpjm1 ! DO ji = 1, fs_jpim1 ! vector opt. ! upstream indicator zcofi = MAX( zind(ji+1,jj,jk), zind(ji,jj,jk) ) zcofj = MAX( zind(ji,jj+1,jk), zind(ji,jj,jk) ) ! ! upstream scheme zfp_ui = pun(ji,jj,jk) + ABS( pun(ji,jj,jk) ) zfm_ui = pun(ji,jj,jk) - ABS( pun(ji,jj,jk) ) zfp_vj = pvn(ji,jj,jk) + ABS( pvn(ji,jj,jk) ) zfm_vj = pvn(ji,jj,jk) - ABS( pvn(ji,jj,jk) ) zupsut = zfp_ui * ptb(ji,jj,jk,jn) + zfm_ui * ptb(ji+1,jj ,jk,jn) zupsvt = zfp_vj * ptb(ji,jj,jk,jn) + zfm_vj * ptb(ji ,jj+1,jk,jn) ! centered scheme zcenut = pun(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji+1,jj ,jk,jn) ) zcenvt = pvn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji ,jj+1,jk,jn) ) ! mixed centered / upstream scheme zwx(ji,jj,jk) = 0.5 * ( zcofi * zupsut + (1.-zcofi) * zcenut ) zwy(ji,jj,jk) = 0.5 * ( zcofj * zupsvt + (1.-zcofj) * zcenvt ) END DO END DO END DO ! II. Vertical advection ! ================== ! ! ! Vertical advective fluxes zwz(:,:,jpk) = 0.e0 ! Bottom value : flux set to zero ! ! Surface value : IF( lk_vvl ) THEN ; zwz(:,:, 1 ) = 0.e0 ! volume variable ELSE DO jj = 1, jpj ! vector opt. DO ji = 1, jpi ! vector opt. ikt = mikt(ji,jj) zwz(ji,jj,ikt ) = pwn(ji,jj,ikt) * ptn(ji,jj,ikt,jn) ! linear free surface zwz(ji,jj,1:ikt-1) = 0.e0 END DO END DO ENDIF ! DO jk = 2, jpk ! Second order centered tracer flux at w-point DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. ! upstream indicator zcofk = MAX( zind(ji,jj,jk-1), zind(ji,jj,jk) ) ! mixed centered / upstream scheme zfp_w = pwn(ji,jj,jk) + ABS( pwn(ji,jj,jk) ) zfm_w = pwn(ji,jj,jk) - ABS( pwn(ji,jj,jk) ) zupst = zfp_w * ptb(ji,jj,jk,jn) + zfm_w * ptb(ji,jj,jk-1,jn) ! centered scheme zcent = pwn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji,jj,jk-1,jn) ) ! mixed centered / upstream scheme zwz(ji,jj,jk) = 0.5 * ( zcofk * zupst + (1.-zcofk) * zcent ) END DO END DO END DO ! II. Divergence of advective fluxes ! ---------------------------------- DO jk = 1, jpkm1 DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zbtr = 1. / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) ! advective trends ztra = - zbtr * ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) ! advective trends added to the general tracer trends pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra END DO END DO END DO ! ! trend diagnostics IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. & &( cdtype == 'TRC' .AND. l_trdtrc ) ) THEN CALL trd_tra( kt, cdtype, jn, jptra_xad, zwx, pun, ptn(:,:,:,jn) ) CALL trd_tra( kt, cdtype, jn, jptra_yad, zwy, pvn, ptn(:,:,:,jn) ) CALL trd_tra( kt, cdtype, jn, jptra_zad, zwz, pwn, ptn(:,:,:,jn) ) END IF ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) IF( cdtype == 'TRA' .AND. ln_diaptr ) CALL dia_ptr_ohst_components( jn, 'adv', zwy(:,:,:) ) ! END DO ! --------------------------- required in restart file to ensure restartability) ! avmb, avtb will be read in zdfini in restart case as they are used in zdftke, kpp etc... IF( lrst_oce .AND. cdtype == 'TRA' ) THEN CALL iom_rstput( kt, nitrst, numrow, 'avmb', avmb ) CALL iom_rstput( kt, nitrst, numrow, 'avtb', avtb ) ENDIF ! CALL wrk_dealloc( jpi, jpj, zpres, zfzp ) CALL wrk_dealloc( jpi, jpj, jpk, zwx, zwy, zwz, zind ) ! IF( nn_timing == 1 ) CALL timing_stop('tra_adv_cen2') ! END SUBROUTINE tra_adv_cen2 SUBROUTINE ups_orca_set !!---------------------------------------------------------------------- !! *** ROUTINE ups_orca_set *** !! !! ** Purpose : add a portion of upstream scheme in area where the !! centered scheme generates too strong overshoot !! !! ** Method : orca (R4 and R2) confiiguration setting. Set upsmsk !! array to nozero value in some straith. !! !! ** Action : - upsmsk set to 1 at some strait, 0 elsewhere for orca !!---------------------------------------------------------------------- INTEGER :: ii0, ii1, ij0, ij1 ! temporary integers !!---------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('ups_orca_set') ! ! mixed upstream/centered scheme near river mouths ! ------------------------------------------------ SELECT CASE ( jp_cfg ) ! ! ======================= CASE ( 4 ) ! ORCA_R4 configuration ! ! ======================= ! ! Gibraltar Strait ii0 = 70 ; ii1 = 71 ij0 = 52 ; ij1 = 53 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.50 ! ! ! ======================= CASE ( 2 ) ! ORCA_R2 configuration ! ! ======================= ! ! Gibraltar Strait ij0 = 102 ; ij1 = 102 ii0 = 138 ; ii1 = 138 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.20 ii0 = 139 ; ii1 = 139 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.40 ii0 = 140 ; ii1 = 140 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.50 ij0 = 101 ; ij1 = 102 ii0 = 141 ; ii1 = 141 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.50 ! ! Bab el Mandeb Strait ij0 = 87 ; ij1 = 88 ii0 = 164 ; ii1 = 164 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.10 ij0 = 88 ; ij1 = 88 ii0 = 163 ; ii1 = 163 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.25 ii0 = 162 ; ii1 = 162 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.40 ii0 = 160 ; ii1 = 161 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.50 ij0 = 89 ; ij1 = 89 ii0 = 158 ; ii1 = 160 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.25 ij0 = 90 ; ij1 = 90 ii0 = 160 ; ii1 = 160 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.25 ! ! Sound Strait ij0 = 116 ; ij1 = 116 ii0 = 144 ; ii1 = 144 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.25 ii0 = 145 ; ii1 = 147 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.50 ii0 = 148 ; ii1 = 148 ; upsmsk( mi0(ii0):mi1(ii1) , mj0(ij0):mj1(ij1) ) = 0.25 ! END SELECT ! mixed upstream/centered scheme over closed seas ! ----------------------------------------------- CALL clo_ups( upsmsk(:,:) ) ! IF( nn_timing == 1 ) CALL timing_stop('ups_orca_set') ! END SUBROUTINE ups_orca_set !!====================================================================== END MODULE traadv_cen2