MODULE dynldf_lap_blp !!====================================================================== !! *** MODULE dynldf_lap_blp *** !! Ocean dynamics: lateral viscosity trend (laplacian and bilaplacian) !!====================================================================== !! History : 3.7 ! 2014-01 (G. Madec, S. Masson) Original code, re-entrant laplacian !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! dyn_ldf_lap : update the momentum trend with the lateral viscosity using an iso-level laplacian operator !! dyn_ldf_blp : update the momentum trend with the lateral viscosity using an iso-level bilaplacian operator !!---------------------------------------------------------------------- USE oce ! ocean dynamics and tracers USE dom_oce ! ocean space and time domain USE ldfdyn ! lateral diffusion: eddy viscosity coef. USE ldfslp ! iso-neutral slopes USE zdf_oce ! ocean vertical physics ! USE in_out_manager ! I/O manager USE lbclnk ! ocean lateral boundary conditions (or mpp link) IMPLICIT NONE PRIVATE PUBLIC dyn_ldf_lap ! called by dynldf.F90 PUBLIC dyn_ldf_blp ! called by dynldf.F90 !! * Substitutions # include "do_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id$ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE dyn_ldf_lap( kt, Kbb, Kmm, pu, pv, pu_rhs, pv_rhs, kpass ) !!---------------------------------------------------------------------- !! *** ROUTINE dyn_ldf_lap *** !! !! ** Purpose : Compute the before horizontal momentum diffusive !! trend and add it to the general trend of momentum equation. !! !! ** Method : The Laplacian operator apply on horizontal velocity is !! writen as : grad_h( ahmt div_h(U )) - curl_h( ahmf curl_z(U) ) !! !! ** Action : - pu_rhs, pv_rhs increased by the harmonic operator applied on pu, pv. !!---------------------------------------------------------------------- INTEGER , INTENT(in ) :: kt ! ocean time-step index INTEGER , INTENT(in ) :: Kbb, Kmm ! ocean time level indices INTEGER , INTENT(in ) :: kpass ! =1/2 first or second passage REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pu, pv ! before velocity [m/s] REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pu_rhs, pv_rhs ! velocity trend [m/s2] ! INTEGER :: ji, jj, jk ! dummy loop indices REAL(wp) :: zsign ! local scalars REAL(wp) :: zua, zva ! local scalars REAL(wp), DIMENSION(jpi,jpj) :: zcur, zdiv !!---------------------------------------------------------------------- ! IF( kt == nit000 .AND. lwp ) THEN WRITE(numout,*) WRITE(numout,*) 'dyn_ldf : iso-level harmonic (laplacian) operator, pass=', kpass WRITE(numout,*) '~~~~~~~ ' ENDIF ! IF( kpass == 1 ) THEN ; zsign = 1._wp ! bilaplacian operator require a minus sign ELSE ; zsign = -1._wp ! (eddy viscosity coef. >0) ENDIF ! ! ! =============== DO jk = 1, jpkm1 ! Horizontal slab ! ! =============== DO_2D_01_01 ! ! ahm * e3 * curl (computed from 1 to jpim1/jpjm1) !!gm open question here : e3f at before or now ? probably now... !!gm note that ahmf has already been multiplied by fmask zcur(ji-1,jj-1) = ahmf(ji-1,jj-1,jk) * e3f(ji-1,jj-1,jk) * r1_e1e2f(ji-1,jj-1) & & * ( e2v(ji ,jj-1) * pv(ji ,jj-1,jk) - e2v(ji-1,jj-1) * pv(ji-1,jj-1,jk) & & - e1u(ji-1,jj ) * pu(ji-1,jj ,jk) + e1u(ji-1,jj-1) * pu(ji-1,jj-1,jk) ) ! ! ahm * div (computed from 2 to jpi/jpj) !!gm note that ahmt has already been multiplied by tmask zdiv(ji,jj) = ahmt(ji,jj,jk) * r1_e1e2t(ji,jj) / e3t(ji,jj,jk,Kbb) & & * ( e2u(ji,jj)*e3u(ji,jj,jk,Kbb) * pu(ji,jj,jk) - e2u(ji-1,jj)*e3u(ji-1,jj,jk,Kbb) * pu(ji-1,jj,jk) & & + e1v(ji,jj)*e3v(ji,jj,jk,Kbb) * pv(ji,jj,jk) - e1v(ji,jj-1)*e3v(ji,jj-1,jk,Kbb) * pv(ji,jj-1,jk) ) END_2D ! DO_2D_00_00 pu_rhs(ji,jj,jk) = pu_rhs(ji,jj,jk) + zsign * ( & & - ( zcur(ji ,jj) - zcur(ji,jj-1) ) * r1_e2u(ji,jj) / e3u(ji,jj,jk,Kmm) & & + ( zdiv(ji+1,jj) - zdiv(ji,jj ) ) * r1_e1u(ji,jj) ) ! pv_rhs(ji,jj,jk) = pv_rhs(ji,jj,jk) + zsign * ( & & ( zcur(ji,jj ) - zcur(ji-1,jj) ) * r1_e1v(ji,jj) / e3v(ji,jj,jk,Kmm) & & + ( zdiv(ji,jj+1) - zdiv(ji ,jj) ) * r1_e2v(ji,jj) ) END_2D ! ! =============== END DO ! End of slab ! ! =============== ! END SUBROUTINE dyn_ldf_lap SUBROUTINE dyn_ldf_blp( kt, Kbb, Kmm, pu, pv, pu_rhs, pv_rhs ) !!---------------------------------------------------------------------- !! *** ROUTINE dyn_ldf_blp *** !! !! ** Purpose : Compute the before lateral momentum viscous trend !! and add it to the general trend of momentum equation. !! !! ** Method : The lateral viscous trends is provided by a bilaplacian !! operator applied to before field (forward in time). !! It is computed by two successive calls to dyn_ldf_lap routine !! !! ** Action : pt(:,:,:,:,Krhs) updated with the before rotated bilaplacian diffusion !!---------------------------------------------------------------------- INTEGER , INTENT(in ) :: kt ! ocean time-step index INTEGER , INTENT(in ) :: Kbb, Kmm ! ocean time level indices REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pu, pv ! before velocity fields REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pu_rhs, pv_rhs ! momentum trend ! REAL(wp), DIMENSION(jpi,jpj,jpk) :: zulap, zvlap ! laplacian at u- and v-point !!---------------------------------------------------------------------- ! IF( kt == nit000 ) THEN IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'dyn_ldf_blp : bilaplacian operator momentum ' IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~' ENDIF ! zulap(:,:,:) = 0._wp zvlap(:,:,:) = 0._wp ! CALL dyn_ldf_lap( kt, Kbb, Kmm, pu, pv, zulap, zvlap, 1 ) ! rotated laplacian applied to pt (output in zlap,Kbb) ! CALL lbc_lnk_multi( 'dynldf_lap_blp', zulap, 'U', -1., zvlap, 'V', -1. ) ! Lateral boundary conditions ! CALL dyn_ldf_lap( kt, Kbb, Kmm, zulap, zvlap, pu_rhs, pv_rhs, 2 ) ! rotated laplacian applied to zlap (output in pt(:,:,:,:,Krhs)) ! END SUBROUTINE dyn_ldf_blp !!====================================================================== END MODULE dynldf_lap_blp