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traldf_iso_grif.F90 in branches/UKMO/dev_r5107_xios_initialize_toyoce/NEMOGCM/NEMO/OPA_SRC/TRA – NEMO

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source: branches/UKMO/dev_r5107_xios_initialize_toyoce/NEMOGCM/NEMO/OPA_SRC/TRA/traldf_iso_grif.F90 @ 5277

Last change on this file since 5277 was 5277, checked in by dancopsey, 9 years ago
Removed SVN keywords.
File size: 22.7 KB

Rev	Line
[2205]	1	MODULE traldf_iso_grif
[2371]	2	!!======================================================================
[2205]	3	!! * MODULE traldf_iso_grif *
[2371]	4	!! Ocean tracers: horizontal component of the lateral tracer mixing trend
	5	!!======================================================================
[3294]	6	!! History : 3.3 ! 2010-10 (G. Nurser, C. Harris, G. Madec)
[2371]	7	!! ! Griffies operator version adapted from traldf_iso.F90
[2205]	8	!!----------------------------------------------------------------------
	9	#if defined key_ldfslp \|\| defined key_esopa
	10	!!----------------------------------------------------------------------
	11	!! 'key_ldfslp' slope of the lateral diffusive direction
	12	!!----------------------------------------------------------------------
[3294]	13	!! tra_ldf_iso_grif : update the tracer trend with the horizontal component
	14	!! of the Griffies iso-neutral laplacian operator
[2205]	15	!!----------------------------------------------------------------------
	16	USE oce ! ocean dynamics and active tracers
	17	USE dom_oce ! ocean space and time domain
[2715]	18	USE phycst ! physical constants
[2454]	19	USE trc_oce ! share passive tracers/Ocean variables
	20	USE zdf_oce ! ocean vertical physics
[2205]	21	USE ldftra_oce ! ocean active tracers: lateral physics
	22	USE ldfslp ! iso-neutral slopes
	23	USE diaptr ! poleward transport diagnostics
[2454]	24	USE in_out_manager ! I/O manager
	25	USE iom ! I/O library
[2371]	26	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
[2715]	27	USE lib_mpp ! MPP library
[3294]	28	USE wrk_nemo ! Memory Allocation
	29	USE timing ! Timing
[2205]	30
[3294]	31
[2205]	32	IMPLICIT NONE
	33	PRIVATE
	34
[2715]	35	PUBLIC tra_ldf_iso_grif ! routine called by traldf.F90
[2205]	36
[2715]	37	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE, SAVE :: psix_eiv, psiy_eiv !: eiv stream function (diag only)
	38	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE, SAVE :: ah_wslp2 !: aeiv*w-slope^2
[3294]	39	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE, SAVE :: zdkt3d !: vertical tracer gradient at 2 levels
[2371]	40
[2205]	41	!! * Substitutions
	42	# include "domzgr_substitute.h90"
	43	# include "ldftra_substitute.h90"
[2371]	44	# include "vectopt_loop_substitute.h90"
[2205]	45	# include "ldfeiv_substitute.h90"
	46	!!----------------------------------------------------------------------
[2287]	47	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
	48	!! $Id$
[2399]	49	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[2205]	50	!!----------------------------------------------------------------------
	51	CONTAINS
	52
[3294]	53	SUBROUTINE tra_ldf_iso_grif( kt, kit000, cdtype, pgu, pgv, &
[2399]	54	& ptb, pta, kjpt, pahtb0 )
[2450]	55	!!----------------------------------------------------------------------
	56	!! * ROUTINE tra_ldf_iso_grif *
	57	!!
[3294]	58	!! ** Purpose : Compute the before horizontal tracer (t & s) diffusive
	59	!! trend for a laplacian tensor (ezxcept the dz[ dz[.] ] term) and
[2450]	60	!! add it to the general trend of tracer equation.
	61	!!
[3294]	62	!! ** Method : The horizontal component of the lateral diffusive trends
[2450]	63	!! is provided by a 2nd order operator rotated along neural or geopo-
	64	!! tential surfaces to which an eddy induced advection can be added
	65	!! It is computed using before fields (forward in time) and isopyc-
	66	!! nal or geopotential slopes computed in routine ldfslp.
	67	!!
	68	!! 1st part : masked horizontal derivative of T ( di[ t ] )
	69	!! ======== with partial cell update if ln_zps=T.
	70	!!
	71	!! 2nd part : horizontal fluxes of the lateral mixing operator
[3294]	72	!! ========
[2450]	73	!! zftu = (aht+ahtb0) e2u*e3u/e1u di[ tb ]
	74	!! - aht e2u*uslp dk[ mi(mk(tb)) ]
	75	!! zftv = (aht+ahtb0) e1v*e3v/e2v dj[ tb ]
	76	!! - aht e2u*vslp dk[ mj(mk(tb)) ]
	77	!! take the horizontal divergence of the fluxes:
	78	!! difft = 1/(e1te2te3t) { di-1[ zftu ] + dj-1[ zftv ] }
	79	!! Add this trend to the general trend (ta,sa):
	80	!! ta = ta + difft
	81	!!
	82	!! 3rd part: vertical trends of the lateral mixing operator
	83	!! ======== (excluding the vertical flux proportional to dk[t] )
	84	!! vertical fluxes associated with the rotated lateral mixing:
	85	!! zftw =-aht { e2t*wslpi di[ mi(mk(tb)) ]
	86	!! + e1t*wslpj dj[ mj(mk(tb)) ] }
	87	!! take the horizontal divergence of the fluxes:
	88	!! difft = 1/(e1te2te3t) dk[ zftw ]
	89	!! Add this trend to the general trend (ta,sa):
	90	!! pta = pta + difft
	91	!!
	92	!! ** Action : Update pta arrays with the before rotated diffusion
	93	!!----------------------------------------------------------------------
[2715]	94	USE oce , ONLY: zftu => ua , zftv => va ! (ua,va) used as 3D workspace
	95	!
[2450]	96	INTEGER , INTENT(in ) :: kt ! ocean time-step index
[3294]	97	INTEGER , INTENT(in ) :: kit000 ! first time step index
[2450]	98	CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator)
	99	INTEGER , INTENT(in ) :: kjpt ! number of tracers
	100	REAL(wp), DIMENSION(jpi,jpj ,kjpt), INTENT(in ) :: pgu, pgv ! tracer gradient at pstep levels
	101	REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb ! before and now tracer fields
[3294]	102	REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend
[2450]	103	REAL(wp) , INTENT(in ) :: pahtb0 ! background diffusion coef
[2715]	104	!
[2450]	105	INTEGER :: ji, jj, jk,jn ! dummy loop indices
	106	INTEGER :: ip,jp,kp ! dummy loop indices
	107	INTEGER :: ierr ! temporary integer
	108	REAL(wp) :: zmsku, zabe1, zcof1, zcoef3 ! local scalars
	109	REAL(wp) :: zmskv, zabe2, zcof2, zcoef4 ! - -
	110	REAL(wp) :: zcoef0, zbtr ! - -
[2371]	111	!
[2454]	112	REAL(wp) :: zslope_skew, zslope_iso, zslope2, zbu, zbv
	113	REAL(wp) :: ze1ur, zdxt, ze2vr, ze3wr, zdyt, zdzt
	114	REAL(wp) :: zah, zah_slp, zaei_slp
[2371]	115	#if defined key_diaar5
[2715]	116	REAL(wp) :: zztmp ! local scalar
[2371]	117	#endif
[3294]	118	REAL(wp), POINTER, DIMENSION(:,: ) :: z2d
	119	REAL(wp), POINTER, DIMENSION(:,:,:) :: zdit, zdjt, ztfw
	120	REAL(wp), POINTER, DIMENSION(:,:,:) :: zw3d ! 3D workspace
[2205]	121	!!----------------------------------------------------------------------
[3294]	122	!
	123	IF( nn_timing == 1 ) CALL timing_start('tra_ldf_iso_grif')
	124	!
	125	CALL wrk_alloc( jpi, jpj, z2d )
	126	CALL wrk_alloc( jpi, jpj, jpk, zdit, zdjt, ztfw )
	127	!
[2205]	128
[3294]	129	IF( kt == kit000 .AND. .NOT.ALLOCATED(ah_wslp2) ) THEN
[2450]	130	IF(lwp) WRITE(numout,*)
	131	IF(lwp) WRITE(numout,*) 'tra_ldf_iso_grif : rotated laplacian diffusion operator on ', cdtype
	132	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~'
[3294]	133	ALLOCATE( ah_wslp2(jpi,jpj,jpk) , zdkt3d(jpi,jpj,0:1), STAT=ierr )
[2715]	134	IF( lk_mpp ) CALL mpp_sum ( ierr )
	135	IF( ierr > 0 ) CALL ctl_stop('STOP', 'tra_ldf_iso_grif: unable to allocate arrays')
[2450]	136	IF( ln_traldf_gdia ) THEN
[3294]	137	IF (.NOT. ALLOCATED(psix_eiv))THEN
	138	ALLOCATE( psix_eiv(jpi,jpj,jpk) , psiy_eiv(jpi,jpj,jpk) , STAT=ierr )
	139	IF( lk_mpp ) CALL mpp_sum ( ierr )
	140	IF( ierr > 0 ) CALL ctl_stop('STOP', 'tra_ldf_iso_grif: unable to allocate diagnostics')
	141	ENDIF
[2450]	142	ENDIF
	143	ENDIF
[2371]	144
[2205]	145	!!----------------------------------------------------------------------
[3294]	146	!! 0 - calculate ah_wslp2, psix_eiv, psiy_eiv
[2371]	147	!!----------------------------------------------------------------------
[2205]	148
[3294]	149	!!gm Future development: consider using Ah defined at T-points and attached to the 4 t-point triads
[2205]	150
[2454]	151	ah_wslp2(:,:,:) = 0._wp
[2450]	152	IF( ln_traldf_gdia ) THEN
[2454]	153	psix_eiv(:,:,:) = 0._wp
	154	psiy_eiv(:,:,:) = 0._wp
[2450]	155	ENDIF
[2205]	156
[2454]	157	DO ip = 0, 1
	158	DO kp = 0, 1
	159	DO jk = 1, jpkm1
	160	DO jj = 1, jpjm1
	161	DO ji = 1, fs_jpim1
[3294]	162	ze1ur = 1._wp / e1u(ji,jj)
[2454]	163	ze3wr = 1._wp / fse3w(ji+ip,jj,jk+kp)
	164	zbu = 0.25_wp * e1u(ji,jj) * e2u(ji,jj) * fse3u(ji,jj,jk)
[3294]	165	zah = fsahtu(ji,jj,jk) ! fsaht(ji+ip,jj,jk)
[2450]	166	zslope_skew = triadi_g(ji+ip,jj,jk,1-ip,kp)
[3294]	167	! Subtract s-coordinate slope at t-points to give slope rel to s surfaces
	168	! (do this by adding gradient of depth)
	169	zslope2 = zslope_skew + ( fsdept(ji+1,jj,jk) - fsdept(ji ,jj ,jk) ) * ze1ur * umask(ji,jj,jk+kp)
[2454]	170	zslope2 = zslope2 *zslope2
	171	ah_wslp2(ji+ip,jj,jk+kp) = ah_wslp2(ji+ip,jj,jk+kp) &
[2456]	172	& + zah * ( zbu * ze3wr / ( e1t(ji+ip,jj) * e2t(ji+ip,jj) ) ) * zslope2
[2450]	173	IF( ln_traldf_gdia ) THEN
[3294]	174	zaei_slp = fsaeiw(ji+ip,jj,jk) * zslope_skew ! fsaeit(ji+ip,jj,jk)*zslope_skew
[2454]	175	psix_eiv(ji,jj,jk+kp) = psix_eiv(ji,jj,jk+kp) + 0.25_wp * zaei_slp
[2450]	176	ENDIF
	177	END DO
	178	END DO
	179	END DO
	180	END DO
	181	END DO
	182	!
[2454]	183	DO jp = 0, 1
	184	DO kp = 0, 1
	185	DO jk = 1, jpkm1
	186	DO jj = 1, jpjm1
[2450]	187	DO ji=1,fs_jpim1
[3294]	188	ze2vr = 1._wp / e2v(ji,jj)
[2454]	189	ze3wr = 1.0_wp / fse3w(ji,jj+jp,jk+kp)
	190	zbv = 0.25_wp * e1v(ji,jj) * e2v(ji,jj) * fse3v(ji,jj,jk)
[3294]	191	zah = fsahtv(ji,jj,jk) ! fsaht(ji,jj+jp,jk)
[2450]	192	zslope_skew = triadj_g(ji,jj+jp,jk,1-jp,kp)
[3294]	193	! Subtract s-coordinate slope at t-points to give slope rel to s surfaces
	194	! (do this by adding gradient of depth)
	195	zslope2 = zslope_skew + ( fsdept(ji,jj+1,jk) - fsdept(ji,jj,jk) ) * ze2vr * vmask(ji,jj,jk+kp)
[2454]	196	zslope2 = zslope2 * zslope2
	197	ah_wslp2(ji,jj+jp,jk+kp) = ah_wslp2(ji,jj+jp,jk+kp) &
	198	& + zah * ( zbv * ze3wr / ( e1t(ji,jj+jp) * e2t(ji,jj+jp) ) ) * zslope2
[2450]	199	IF( ln_traldf_gdia ) THEN
[3294]	200	zaei_slp = fsaeiw(ji,jj+jp,jk) * zslope_skew ! fsaeit(ji,jj+jp,jk)*zslope_skew
[2454]	201	psiy_eiv(ji,jj,jk+kp) = psiy_eiv(ji,jj,jk+kp) + 0.25_wp * zaei_slp
[2450]	202	ENDIF
	203	END DO
	204	END DO
	205	END DO
	206	END DO
[2205]	207	END DO
[2371]	208	!
[3294]	209	#if defined key_iomput
	210	IF( ln_traldf_gdia .AND. cdtype == 'TRA' ) THEN
	211	CALL wrk_alloc( jpi , jpj , jpk , zw3d )
	212	DO jk=1,jpkm1
	213	zw3d(:,:,jk) = (psix_eiv(:,:,jk+1) - psix_eiv(:,:,jk))/fse3u(:,:,jk) ! u_eiv = -dpsix/dz
	214	END DO
	215	zw3d(:,:,jpk) = 0._wp
	216	CALL iom_put( "uoce_eiv", zw3d ) ! i-eiv current
	217
	218	DO jk=1,jpk-1
	219	zw3d(:,:,jk) = (psiy_eiv(:,:,jk+1) - psiy_eiv(:,:,jk))/fse3v(:,:,jk) ! v_eiv = -dpsiy/dz
	220	END DO
	221	zw3d(:,:,jpk) = 0._wp
	222	CALL iom_put( "voce_eiv", zw3d ) ! j-eiv current
	223
	224	DO jk=1,jpk-1
	225	DO jj = 2, jpjm1
	226	DO ji = fs_2, fs_jpim1 ! vector opt.
[3632]	227	zw3d(ji,jj,jk) = (psiy_eiv(ji,jj,jk) - psiy_eiv(ji,jj-1,jk))/e2t(ji,jj) + &
	228	& (psix_eiv(ji,jj,jk) - psix_eiv(ji-1,jj,jk))/e1t(ji,jj) ! w_eiv = dpsiy/dy + dpsiy/dx
[3294]	229	END DO
	230	END DO
	231	END DO
	232	zw3d(:,:,jpk) = 0._wp
	233	CALL iom_put( "woce_eiv", zw3d ) ! vert. eiv current
	234	CALL wrk_dealloc( jpi , jpj , jpk , zw3d )
	235	ENDIF
	236	#endif
[2371]	237	! ! ===========
	238	DO jn = 1, kjpt ! tracer loop
	239	! ! ===========
	240	! Zero fluxes for each tracer
	241	ztfw(:,:,:) = 0._wp
	242	zftu(:,:,:) = 0._wp
	243	zftv(:,:,:) = 0._wp
[3294]	244	!
[2371]	245	DO jk = 1, jpkm1 !== before lateral T & S gradients at T-level jk ==!
	246	DO jj = 1, jpjm1
	247	DO ji = 1, fs_jpim1 ! vector opt.
	248	zdit(ji,jj,jk) = ( ptb(ji+1,jj ,jk,jn) - ptb(ji,jj,jk,jn) ) * umask(ji,jj,jk)
	249	zdjt(ji,jj,jk) = ( ptb(ji ,jj+1,jk,jn) - ptb(ji,jj,jk,jn) ) * vmask(ji,jj,jk)
	250	END DO
[2205]	251	END DO
	252	END DO
[3294]	253	IF( ln_zps.and.l_grad_zps ) THEN ! partial steps: correction at the last level
[2371]	254	DO jj = 1, jpjm1
	255	DO ji = 1, jpim1
[3294]	256	zdit(ji,jj,mbku(ji,jj)) = pgu(ji,jj,jn)
	257	zdjt(ji,jj,mbkv(ji,jj)) = pgv(ji,jj,jn)
[2371]	258	END DO
	259	END DO
	260	ENDIF
[2205]	261
[2371]	262	!!----------------------------------------------------------------------
	263	!! II - horizontal trend (full)
	264	!!----------------------------------------------------------------------
	265	!
	266	DO jk = 1, jpkm1
	267	!
	268	! !== Vertical tracer gradient at level jk and jk+1
[3294]	269	zdkt3d(:,:,1) = ( ptb(:,:,jk,jn) - ptb(:,:,jk+1,jn) ) * tmask(:,:,jk+1)
[2371]	270	!
[3294]	271	! ! surface boundary condition: zdkt3d(jk=0)=zdkt3d(jk=1)
	272	IF( jk == 1 ) THEN ; zdkt3d(:,:,0) = zdkt3d(:,:,1)
	273	ELSE ; zdkt3d(:,:,0) = ( ptb(:,:,jk-1,jn) - ptb(:,:,jk,jn) ) * tmask(:,:,jk)
[2371]	274	ENDIF
[2205]	275
	276
[3294]	277	IF (ln_botmix_grif) THEN
	278	DO ip = 0, 1 !== Horizontal & vertical fluxes
	279	DO kp = 0, 1
	280	DO jj = 1, jpjm1
	281	DO ji = 1, fs_jpim1
	282	ze1ur = 1._wp / e1u(ji,jj)
	283	zdxt = zdit(ji,jj,jk) * ze1ur
	284	ze3wr = 1._wp / fse3w(ji+ip,jj,jk+kp)
	285	zdzt = zdkt3d(ji+ip,jj,kp) * ze3wr
	286	zslope_skew = triadi_g(ji+ip,jj,jk,1-ip,kp)
	287	zslope_iso = triadi(ji+ip,jj,jk,1-ip,kp)
[2205]	288
[3294]	289	zbu = 0.25_wp * e1u(ji,jj) * e2u(ji,jj) * fse3u(ji,jj,jk)
	290	! ln_botmix_grif is .T. don't mask zah for bottom half cells
	291	zah = fsahtu(ji,jj,jk) !*umask(ji,jj,jk+kp) !fsaht(ji+ip,jj,jk) ===>> ????
	292	zah_slp = zah * zslope_iso
	293	zaei_slp = fsaeiw(ji+ip,jj,jk) * zslope_skew !fsaeit(ji+ip,jj,jk)*zslope_skew
	294	zftu(ji,jj,jk) = zftu(ji,jj,jk) - ( zah * zdxt + (zah_slp - zaei_slp) * zdzt ) * zbu * ze1ur
	295	ztfw(ji+ip,jj,jk+kp) = ztfw(ji+ip,jj,jk+kp) - (zah_slp + zaei_slp) * zdxt * zbu * ze3wr
	296	END DO
[2371]	297	END DO
	298	END DO
	299	END DO
[2205]	300
[3294]	301	DO jp = 0, 1
	302	DO kp = 0, 1
	303	DO jj = 1, jpjm1
	304	DO ji = 1, fs_jpim1
	305	ze2vr = 1._wp / e2v(ji,jj)
	306	zdyt = zdjt(ji,jj,jk) * ze2vr
	307	ze3wr = 1._wp / fse3w(ji,jj+jp,jk+kp)
	308	zdzt = zdkt3d(ji,jj+jp,kp) * ze3wr
	309	zslope_skew = triadj_g(ji,jj+jp,jk,1-jp,kp)
	310	zslope_iso = triadj(ji,jj+jp,jk,1-jp,kp)
	311	zbv = 0.25_wp * e1v(ji,jj) * e2v(ji,jj) * fse3v(ji,jj,jk)
	312	! ln_botmix_grif is .T. don't mask zah for bottom half cells
	313	zah = fsahtv(ji,jj,jk) !*vmask(ji,jj,jk+kp) ! fsaht(ji,jj+jp,jk)
	314	zah_slp = zah * zslope_iso
	315	zaei_slp = fsaeiw(ji,jj+jp,jk) * zslope_skew ! fsaeit(ji,jj+jp,jk)*zslope_skew
	316	zftv(ji,jj,jk) = zftv(ji,jj,jk) - ( zah * zdyt + (zah_slp - zaei_slp) * zdzt ) * zbv * ze2vr
	317	ztfw(ji,jj+jp,jk+kp) = ztfw(ji,jj+jp,jk+kp) - (zah_slp + zaei_slp) * zdyt * zbv * ze3wr
	318	END DO
[2371]	319	END DO
	320	END DO
	321	END DO
[3294]	322	ELSE
	323	DO ip = 0, 1 !== Horizontal & vertical fluxes
	324	DO kp = 0, 1
	325	DO jj = 1, jpjm1
	326	DO ji = 1, fs_jpim1
	327	ze1ur = 1._wp / e1u(ji,jj)
	328	zdxt = zdit(ji,jj,jk) * ze1ur
	329	ze3wr = 1._wp / fse3w(ji+ip,jj,jk+kp)
	330	zdzt = zdkt3d(ji+ip,jj,kp) * ze3wr
	331	zslope_skew = triadi_g(ji+ip,jj,jk,1-ip,kp)
	332	zslope_iso = triadi(ji+ip,jj,jk,1-ip,kp)
[2205]	333
[3294]	334	zbu = 0.25_wp * e1u(ji,jj) * e2u(ji,jj) * fse3u(ji,jj,jk)
	335	! ln_botmix_grif is .F. mask zah for bottom half cells
	336	zah = fsahtu(ji,jj,jk) * umask(ji,jj,jk+kp) ! fsaht(ji+ip,jj,jk) ===>> ????
	337	zah_slp = zah * zslope_iso
	338	zaei_slp = fsaeiw(ji+ip,jj,jk) * zslope_skew ! fsaeit(ji+ip,jj,jk)*zslope_skew
	339	zftu(ji,jj,jk) = zftu(ji,jj,jk) - ( zah * zdxt + (zah_slp - zaei_slp) * zdzt ) * zbu * ze1ur
	340	ztfw(ji+ip,jj,jk+kp) = ztfw(ji+ip,jj,jk+kp) - (zah_slp + zaei_slp) * zdxt * zbu * ze3wr
	341	END DO
	342	END DO
	343	END DO
	344	END DO
	345
	346	DO jp = 0, 1
	347	DO kp = 0, 1
	348	DO jj = 1, jpjm1
	349	DO ji = 1, fs_jpim1
	350	ze2vr = 1._wp / e2v(ji,jj)
	351	zdyt = zdjt(ji,jj,jk) * ze2vr
	352	ze3wr = 1._wp / fse3w(ji,jj+jp,jk+kp)
	353	zdzt = zdkt3d(ji,jj+jp,kp) * ze3wr
	354	zslope_skew = triadj_g(ji,jj+jp,jk,1-jp,kp)
	355	zslope_iso = triadj(ji,jj+jp,jk,1-jp,kp)
	356	zbv = 0.25_wp * e1v(ji,jj) * e2v(ji,jj) * fse3v(ji,jj,jk)
	357	! ln_botmix_grif is .F. mask zah for bottom half cells
	358	zah = fsahtv(ji,jj,jk) * vmask(ji,jj,jk+kp) ! fsaht(ji,jj+jp,jk)
	359	zah_slp = zah * zslope_iso
	360	zaei_slp = fsaeiw(ji,jj+jp,jk) * zslope_skew ! fsaeit(ji,jj+jp,jk)*zslope_skew
	361	zftv(ji,jj,jk) = zftv(ji,jj,jk) - ( zah * zdyt + (zah_slp - zaei_slp) * zdzt ) * zbv * ze2vr
	362	ztfw(ji,jj+jp,jk+kp) = ztfw(ji,jj+jp,jk+kp) - (zah_slp + zaei_slp) * zdyt * zbv * ze3wr
	363	END DO
	364	END DO
	365	END DO
	366	END DO
	367	END IF
	368	! !== divergence and add to the general trend ==!
[2450]	369	DO jj = 2 , jpjm1
[3294]	370	DO ji = fs_2, fs_jpim1 ! vector opt.
[2450]	371	zbtr = 1._wp / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) )
	372	pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + zbtr * ( zftu(ji-1,jj,jk) - zftu(ji,jj,jk) &
	373	& + zftv(ji,jj-1,jk) - zftv(ji,jj,jk) )
	374	END DO
	375	END DO
	376	!
	377	END DO
	378	!
[3294]	379	DO jk = 1, jpkm1 !== Divergence of vertical fluxes added to the general tracer trend
[2450]	380	DO jj = 2, jpjm1
[3294]	381	DO ji = fs_2, fs_jpim1 ! vector opt.
[2450]	382	pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ( ztfw(ji,jj,jk+1) - ztfw(ji,jj,jk) ) &
	383	& / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) )
	384	END DO
	385	END DO
	386	END DO
	387	!
[3294]	388	! ! "Poleward" diffusive heat or salt transports (T-S case only)
[2450]	389	IF( cdtype == 'TRA' .AND. ln_diaptr .AND. ( MOD( kt, nn_fptr ) == 0 ) ) THEN
	390	IF( jn == jp_tem) htr_ldf(:) = ptr_vj( zftv(:,:,:) ) ! 3.3 names
	391	IF( jn == jp_sal) str_ldf(:) = ptr_vj( zftv(:,:,:) )
	392	ENDIF
[2205]	393
[2371]	394	#if defined key_diaar5
[2450]	395	IF( cdtype == 'TRA' .AND. jn == jp_tem ) THEN
[3294]	396	z2d(:,:) = 0._wp
	397	zztmp = rau0 * rcp
[2450]	398	DO jk = 1, jpkm1
	399	DO jj = 2, jpjm1
	400	DO ji = fs_2, fs_jpim1 ! vector opt.
[3294]	401	z2d(ji,jj) = z2d(ji,jj) + zftu(ji,jj,jk)
[2450]	402	END DO
	403	END DO
	404	END DO
	405	z2d(:,:) = zztmp * z2d(:,:)
	406	CALL lbc_lnk( z2d, 'U', -1. )
	407	CALL iom_put( "udiff_heattr", z2d ) ! heat transport in i-direction
[3294]	408	z2d(:,:) = 0._wp
[2450]	409	DO jk = 1, jpkm1
	410	DO jj = 2, jpjm1
	411	DO ji = fs_2, fs_jpim1 ! vector opt.
[3294]	412	z2d(ji,jj) = z2d(ji,jj) + zftv(ji,jj,jk)
[2450]	413	END DO
	414	END DO
	415	END DO
	416	z2d(:,:) = zztmp * z2d(:,:)
	417	CALL lbc_lnk( z2d, 'V', -1. )
[3294]	418	CALL iom_put( "vdiff_heattr", z2d ) ! heat transport in j-direction
[2450]	419	END IF
[2371]	420	#endif
[2450]	421	!
	422	END DO
	423	!
[3294]	424	CALL wrk_dealloc( jpi, jpj, z2d )
	425	CALL wrk_dealloc( jpi, jpj, jpk, zdit, zdjt, ztfw )
[2715]	426	!
[3294]	427	IF( nn_timing == 1 ) CALL timing_stop('tra_ldf_iso_grif')
	428	!
[2371]	429	END SUBROUTINE tra_ldf_iso_grif
	430
[2205]	431	#else
	432	!!----------------------------------------------------------------------
	433	!! default option : Dummy code NO rotation of the diffusive tensor
	434	!!----------------------------------------------------------------------
[3294]	435	REAL, PUBLIC, DIMENSION(:,:,:), ALLOCATABLE, SAVE :: psix_eiv, psiy_eiv !: eiv stream function (diag only)
[2205]	436	CONTAINS
[3294]	437	SUBROUTINE tra_ldf_iso_grif( kt, kit000, cdtype, pgu, pgv, &
	438	& ptb, pta, kjpt, pahtb0 )
[2454]	439	CHARACTER(len=3) :: cdtype
[3294]	440	INTEGER :: kit000 ! first time step index
[2454]	441	REAL, DIMENSION(:,:,:) :: pgu, pgv ! tracer gradient at pstep levels
	442	REAL, DIMENSION(:,:,:,:) :: ptb, pta
	443	WRITE(,) 'tra_ldf_iso_grif: You should not have seen this print! error?', kt, cdtype, &
	444	& pgu(1,1,1), pgv(1,1,1), ptb(1,1,1,1), pta(1,1,1,1), kjpt, pahtb0
[2205]	445	END SUBROUTINE tra_ldf_iso_grif
	446	#endif
	447
	448	!!==============================================================================
	449	END MODULE traldf_iso_grif

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