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sshwzv.F90 @ 10774

Last change on this file since 10774 was 10774, checked in by andmirek, 5 years ago
GMED 450 add flush after prints
File size: 13.3 KB

Rev	Line
[1565]	1	MODULE sshwzv
[3]	2	!!==============================================================================
[1438]	3	!! * MODULE sshwzv *
	4	!! Ocean dynamics : sea surface height and vertical velocity
[3]	5	!!==============================================================================
[1438]	6	!! History : 3.1 ! 2009-02 (G. Madec, M. Leclair) Original code
[2528]	7	!! 3.3 ! 2010-04 (M. Leclair, G. Madec) modified LF-RA
	8	!! - ! 2010-05 (K. Mogensen, A. Weaver, M. Martin, D. Lea) Assimilation interface
	9	!! - ! 2010-09 (D.Storkey and E.O'Dea) bug fixes for BDY module
[4292]	10	!! 3.3 ! 2011-10 (M. Leclair) split former ssh_wzv routine and remove all vvl related work
[3]	11	!!----------------------------------------------------------------------
[1438]	12
[3]	13	!!----------------------------------------------------------------------
[4292]	14	!! ssh_nxt : after ssh
	15	!! ssh_swp : filter ans swap the ssh arrays
	16	!! wzv : compute now vertical velocity
[1438]	17	!!----------------------------------------------------------------------
[3]	18	USE oce ! ocean dynamics and tracers variables
	19	USE dom_oce ! ocean space and time domain variables
[888]	20	USE sbc_oce ! surface boundary condition: ocean
	21	USE domvvl ! Variable volume
[1565]	22	USE divcur ! hor. divergence and curl (div & cur routines)
[4292]	23	USE restart ! only for lrst_oce
[3]	24	USE in_out_manager ! I/O manager
[258]	25	USE prtctl ! Print control
[592]	26	USE phycst
	27	USE lbclnk ! ocean lateral boundary condition (or mpp link)
[2715]	28	USE lib_mpp ! MPP library
[2528]	29	USE bdy_oce
[4292]	30	USE bdy_par
	31	USE bdydyn2d ! bdy_ssh routine
[2528]	32	#if defined key_agrif
[2486]	33	USE agrif_opa_interp
[2528]	34	#endif
	35	#if defined key_asminc
	36	USE asminc ! Assimilation increment
	37	#endif
[3294]	38	USE wrk_nemo ! Memory Allocation
	39	USE timing ! Timing
[592]	40
[3]	41	IMPLICIT NONE
	42	PRIVATE
	43
[1438]	44	PUBLIC ssh_nxt ! called by step.F90
[4292]	45	PUBLIC wzv ! called by step.F90
	46	PUBLIC ssh_swp ! called by step.F90
[3]	47
	48	!! * Substitutions
	49	# include "domzgr_substitute.h90"
[1438]	50	# include "vectopt_loop_substitute.h90"
[3]	51	!!----------------------------------------------------------------------
[2528]	52	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
[888]	53	!! $Id$
[2715]	54	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[592]	55	!!----------------------------------------------------------------------
[3]	56	CONTAINS
	57
[4292]	58	SUBROUTINE ssh_nxt( kt )
[3]	59	!!----------------------------------------------------------------------
[4292]	60	!! * ROUTINE ssh_nxt *
[1438]	61	!!
[4292]	62	!! ** Purpose : compute the after ssh (ssha)
[3]	63	!!
[4292]	64	!! ** Method : - Using the incompressibility hypothesis, the ssh increment
	65	!! is computed by integrating the horizontal divergence and multiply by
	66	!! by the time step.
[3]	67	!!
[1438]	68	!! ** action : ssha : after sea surface height
[2528]	69	!!
	70	!! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling.
[3]	71	!!----------------------------------------------------------------------
[2715]	72	!
[4292]	73	REAL(wp), POINTER, DIMENSION(:,: ) :: zhdiv
	74	INTEGER, INTENT(in) :: kt ! time step
	75	!
[8400]	76	INTEGER :: jk ! dummy loop indices
[4292]	77	REAL(wp) :: z2dt, z1_rau0 ! local scalars
[3]	78	!!----------------------------------------------------------------------
[3294]	79	!
[4292]	80	IF( nn_timing == 1 ) CALL timing_start('ssh_nxt')
[3294]	81	!
[4292]	82	CALL wrk_alloc( jpi, jpj, zhdiv )
[3294]	83	!
[3]	84	IF( kt == nit000 ) THEN
[2528]	85	!
[3]	86	IF(lwp) WRITE(numout,*)
[4292]	87	IF(lwp) WRITE(numout,*) 'ssh_nxt : after sea surface height'
[1438]	88	IF(lwp) WRITE(numout,*) '~~~~~~~ '
[10774]	89	IF(lwp .AND. lflush) CALL flush(numout)
[1438]	90	!
[3]	91	ENDIF
[2528]	92	!
	93	CALL div_cur( kt ) ! Horizontal divergence & Relative vorticity
	94	!
[2715]	95	z2dt = 2._wp * rdt ! set time step size (Euler/Leapfrog)
	96	IF( neuler == 0 .AND. kt == nit000 ) z2dt = rdt
[3]	97
[8400]	98
	99	#if defined key_asminc
	100	! ! Include the IAU weighted SSH increment
	101	IF( lk_asminc .AND. ln_sshinc .AND. ln_asmiau ) THEN
	102	CALL ssh_asm_inc( kt )
	103	#if defined key_vvl
	104	! Don't directly adjust ssh but change hdivn at all levels instead
	105	! In trasbc also add in the heat and salt content associated with these changes at each level
	106	DO jk = 1, jpkm1
	107	hdivn(:,:,jk) = hdivn(:,:,jk) - ( ssh_iau(:,:) / ( ht_0(:,:) + 1.0 - ssmask(:,:) ) ) * ( e3t_0(:,:,jk) / fse3t_n(:,:,jk) ) * tmask(:,:,jk)
	108	END DO
	109	ENDIF
	110	#endif
	111	#endif
	112
	113
[1438]	114	! !------------------------------!
	115	! ! After Sea Surface Height !
	116	! !------------------------------!
[2715]	117	zhdiv(:,:) = 0._wp
[1438]	118	DO jk = 1, jpkm1 ! Horizontal divergence of barotropic transports
[4292]	119	zhdiv(:,:) = zhdiv(:,:) + fse3t_n(:,:,jk) * hdivn(:,:,jk)
[1438]	120	END DO
	121	! ! Sea surface elevation time stepping
[4338]	122	! In time-split case we need a first guess of the ssh after (using the baroclinic timestep) in order to
	123	! compute the vertical velocity which can be used to compute the non-linear terms of the momentum equations.
	124	!
[4292]	125	z1_rau0 = 0.5_wp * r1_rau0
[4990]	126	ssha(:,:) = ( sshb(:,:) - z2dt * ( z1_rau0 * ( emp_b(:,:) + emp(:,:) ) + zhdiv(:,:) ) ) * ssmask(:,:)
[1438]	127
[4486]	128	#if ! defined key_dynspg_ts
	129	! These lines are not necessary with time splitting since
	130	! boundary condition on sea level is set during ts loop
[2486]	131	#if defined key_agrif
[2715]	132	CALL agrif_ssh( kt )
[2486]	133	#endif
[2528]	134	#if defined key_bdy
[4292]	135	IF (lk_bdy) THEN
	136	CALL lbc_lnk( ssha, 'T', 1. ) ! Not sure that's necessary
	137	CALL bdy_ssh( ssha ) ! Duplicate sea level across open boundaries
	138	ENDIF
[2528]	139	#endif
[4486]	140	#endif
	141
[4292]	142
	143	! !------------------------------!
	144	! ! outputs !
	145	! !------------------------------!
	146	!
	147	IF(ln_ctl) CALL prt_ctl( tab2d_1=ssha, clinfo1=' ssha - : ', mask1=tmask, ovlap=1 )
	148	!
	149	CALL wrk_dealloc( jpi, jpj, zhdiv )
	150	!
	151	IF( nn_timing == 1 ) CALL timing_stop('ssh_nxt')
	152	!
	153	END SUBROUTINE ssh_nxt
	154
	155
	156	SUBROUTINE wzv( kt )
	157	!!----------------------------------------------------------------------
	158	!! * ROUTINE wzv *
	159	!!
	160	!! ** Purpose : compute the now vertical velocity
	161	!!
	162	!! ** Method : - Using the incompressibility hypothesis, the vertical
	163	!! velocity is computed by integrating the horizontal divergence
	164	!! from the bottom to the surface minus the scale factor evolution.
	165	!! The boundary conditions are w=0 at the bottom (no flux) and.
	166	!!
	167	!! ** action : wn : now vertical velocity
	168	!!
	169	!! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling.
	170	!!----------------------------------------------------------------------
	171	!
	172	INTEGER, INTENT(in) :: kt ! time step
	173	REAL(wp), POINTER, DIMENSION(:,: ) :: z2d
	174	REAL(wp), POINTER, DIMENSION(:,:,:) :: z3d, zhdiv
	175	!
	176	INTEGER :: ji, jj, jk ! dummy loop indices
	177	REAL(wp) :: z1_2dt ! local scalars
	178	!!----------------------------------------------------------------------
	179
	180	IF( nn_timing == 1 ) CALL timing_start('wzv')
	181	!
	182	IF( kt == nit000 ) THEN
	183	!
	184	IF(lwp) WRITE(numout,*)
	185	IF(lwp) WRITE(numout,*) 'wzv : now vertical velocity '
	186	IF(lwp) WRITE(numout,*) '~~~~~ '
[10774]	187	IF(lwp .AND. lflush) CALL flush(numout)
[4292]	188	!
	189	wn(:,:,jpk) = 0._wp ! bottom boundary condition: w=0 (set once for all)
	190	!
	191	ENDIF
	192	! !------------------------------!
	193	! ! Now Vertical Velocity !
	194	! !------------------------------!
	195	z1_2dt = 1. / ( 2. * rdt ) ! set time step size (Euler/Leapfrog)
	196	IF( neuler == 0 .AND. kt == nit000 ) z1_2dt = 1. / rdt
	197	!
	198	IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN ! z_tilde and layer cases
	199	CALL wrk_alloc( jpi, jpj, jpk, zhdiv )
	200	!
	201	DO jk = 1, jpkm1
	202	! horizontal divergence of thickness diffusion transport ( velocity multiplied by e3t)
[4338]	203	! - ML - note: computation already done in dom_vvl_sf_nxt. Could be optimized (not critical and clearer this way)
[4292]	204	DO jj = 2, jpjm1
	205	DO ji = fs_2, fs_jpim1 ! vector opt.
	206	zhdiv(ji,jj,jk) = r1_e12t(ji,jj) * ( un_td(ji,jj,jk) - un_td(ji-1,jj,jk) + vn_td(ji,jj,jk) - vn_td(ji,jj-1,jk) )
	207	END DO
[592]	208	END DO
	209	END DO
[4292]	210	CALL lbc_lnk(zhdiv, 'T', 1.) ! - ML - Perhaps not necessary: not used for horizontal "connexions"
	211	! ! Is it problematic to have a wrong vertical velocity in boundary cells?
	212	! ! Same question holds for hdivn. Perhaps just for security
	213	DO jk = jpkm1, 1, -1 ! integrate from the bottom the hor. divergence
	214	! computation of w
	215	wn(:,:,jk) = wn(:,:,jk+1) - ( fse3t_n(:,:,jk) * hdivn(:,:,jk) + zhdiv(:,:,jk) &
	216	& + z1_2dt * ( fse3t_a(:,:,jk) - fse3t_b(:,:,jk) ) ) * tmask(:,:,jk)
	217	END DO
	218	! IF( ln_vvl_layer ) wn(:,:,:) = 0.e0
	219	CALL wrk_dealloc( jpi, jpj, jpk, zhdiv )
	220	ELSE ! z_star and linear free surface cases
	221	DO jk = jpkm1, 1, -1 ! integrate from the bottom the hor. divergence
	222	! computation of w
	223	wn(:,:,jk) = wn(:,:,jk+1) - ( fse3t_n(:,:,jk) * hdivn(:,:,jk) &
	224	& + z1_2dt * ( fse3t_a(:,:,jk) - fse3t_b(:,:,jk) ) ) * tmask(:,:,jk)
	225	END DO
[1438]	226	ENDIF
[592]	227
[2528]	228	#if defined key_bdy
[4327]	229	IF (lk_bdy) THEN
	230	DO jk = 1, jpkm1
	231	wn(:,:,jk) = wn(:,:,jk) * bdytmask(:,:)
	232	END DO
	233	ENDIF
[2528]	234	#endif
[4292]	235	!
	236	IF( nn_timing == 1 ) CALL timing_stop('wzv')
[592]	237
	238
[4292]	239	END SUBROUTINE wzv
	240
	241	SUBROUTINE ssh_swp( kt )
[1438]	242	!!----------------------------------------------------------------------
	243	!! * ROUTINE ssh_nxt *
	244	!!
	245	!! ** Purpose : achieve the sea surface height time stepping by
	246	!! applying Asselin time filter and swapping the arrays
[4292]	247	!! ssha already computed in ssh_nxt
[1438]	248	!!
[2528]	249	!! ** Method : - apply Asselin time fiter to now ssh (excluding the forcing
	250	!! from the filter, see Leclair and Madec 2010) and swap :
	251	!! sshn = ssha + atfp * ( sshb -2 sshn + ssha )
	252	!! - atfp * rdt * ( emp_b - emp ) / rau0
	253	!! sshn = ssha
[1438]	254	!!
	255	!! ** action : - sshb, sshn : before & now sea surface height
	256	!! ready for the next time step
[2528]	257	!!
	258	!! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling.
[1438]	259	!!----------------------------------------------------------------------
[2528]	260	INTEGER, INTENT(in) :: kt ! ocean time-step index
[1438]	261	!!----------------------------------------------------------------------
[3294]	262	!
[4292]	263	IF( nn_timing == 1 ) CALL timing_start('ssh_swp')
[3294]	264	!
[1438]	265	IF( kt == nit000 ) THEN
	266	IF(lwp) WRITE(numout,*)
[4292]	267	IF(lwp) WRITE(numout,*) 'ssh_swp : Asselin time filter and swap of sea surface height'
[1438]	268	IF(lwp) WRITE(numout,*) '~~~~~~~ '
[10774]	269	IF(lwp .AND. lflush) CALL flush(numout)
[1438]	270	ENDIF
[592]	271
[4292]	272	# if defined key_dynspg_ts
	273	IF( ( neuler == 0 .AND. kt == nit000 ) .OR. ln_bt_fw ) THEN !** Euler time-stepping: no filter
	274	# else
	275	IF ( neuler == 0 .AND. kt == nit000 ) THEN !** Euler time-stepping at first time-step : no filter
	276	#endif
	277	sshb(:,:) = sshn(:,:) ! before <-- now
	278	sshn(:,:) = ssha(:,:) ! now <-- after (before already = now)
	279	ELSE !** Leap-Frog time-stepping: Asselin filter + swap
	280	sshb(:,:) = sshn(:,:) + atfp * ( sshb(:,:) - 2 * sshn(:,:) + ssha(:,:) ) ! before <-- now filtered
[6487]	281	IF( lk_vvl ) sshb(:,:) = sshb(:,:) - atfp * rdt / rau0 * ( emp_b(:,:) - emp(:,:) &
	282	& - rnf_b(:,:) + rnf(:,:) &
	283	& + fwfisf_b(:,:) - fwfisf(:,:) ) * ssmask(:,:)
[4292]	284	sshn(:,:) = ssha(:,:) ! now <-- after
[1438]	285	ENDIF
	286	!
[2528]	287	IF(ln_ctl) CALL prt_ctl( tab2d_1=sshb, clinfo1=' sshb - : ', mask1=tmask, ovlap=1 )
	288	!
[4292]	289	IF( nn_timing == 1 ) CALL timing_stop('ssh_swp')
[3294]	290	!
[4292]	291	END SUBROUTINE ssh_swp
[3]	292
	293	!!======================================================================
[1565]	294	END MODULE sshwzv

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