New URL for NEMO forge! http://forge.nemo-ocean.eu

Since March 2022 along with NEMO 4.2 release, the code development moved to a self-hosted GitLab.
This present forge is now archived and remained online for history.

geo2ocean.F90 in trunk/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

Context Navigation

source: trunk/NEMOGCM/NEMO/OPA_SRC/SBC/geo2ocean.F90 @ 6010

Last change on this file since 6010 was 5836, checked in by cetlod, 9 years ago
merge the simplification branch onto the trunk, see ticket #1612
Property svn:keywords set to `Id`
File size: 26.2 KB

Rev	Line
[3]	1	MODULE geo2ocean
	2	!!======================================================================
	3	!! * MODULE geo2ocean *
[144]	4	!! Ocean mesh : ???
[1218]	5	!!======================================================================
	6	!! History : OPA ! 07-1996 (O. Marti) Original code
	7	!! NEMO 1.0 ! 02-2008 (G. Madec) F90: Free form
	8	!! 3.0 !
	9	!!----------------------------------------------------------------------
[3]	10
	11	!!----------------------------------------------------------------------
	12	!! repcmo :
	13	!! angle :
	14	!! geo2oce :
	15	!! repere : old routine suppress it ???
	16	!!----------------------------------------------------------------------
	17	USE dom_oce ! mesh and scale factors
	18	USE phycst ! physical constants
	19	USE in_out_manager ! I/O manager
	20	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
[2715]	21	USE lib_mpp ! MPP library
[3]	22
	23	IMPLICIT NONE
[1218]	24	PRIVATE
[3]	25
[1218]	26	PUBLIC rot_rep, repcmo, repere, geo2oce, oce2geo ! only rot_rep should be used
[672]	27	! repcmo and repere are keep only for compatibility.
	28	! they are only a useless overlay of rot_rep
[3]	29
[2528]	30	PUBLIC obs_rot
	31
[2715]	32	REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: &
[672]	33	gsint, gcost, & ! cos/sin between model grid lines and NP direction at T point
	34	gsinu, gcosu, & ! cos/sin between model grid lines and NP direction at U point
	35	gsinv, gcosv, & ! cos/sin between model grid lines and NP direction at V point
	36	gsinf, gcosf ! cos/sin between model grid lines and NP direction at F point
[3]	37
[2715]	38	LOGICAL , SAVE, DIMENSION(4) :: linit = .FALSE.
	39	REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: gsinlon, gcoslon, gsinlat, gcoslat
	40
[672]	41	LOGICAL :: lmust_init = .TRUE. !: used to initialize the cos/sin variables (se above)
	42
[1218]	43	!! * Substitutions
[3]	44	# include "vectopt_loop_substitute.h90"
[1218]	45	!!----------------------------------------------------------------------
[2528]	46	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
[1226]	47	!! $Id$
[2715]	48	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[1218]	49	!!----------------------------------------------------------------------
[3]	50	CONTAINS
	51
	52	SUBROUTINE repcmo ( pxu1, pyu1, pxv1, pyv1, &
[685]	53	px2 , py2 )
[3]	54	!!----------------------------------------------------------------------
	55	!! * ROUTINE repcmo *
	56	!!
	57	!! ** Purpose : Change vector componantes from a geographic grid to a
	58	!! stretched coordinates grid.
	59	!!
	60	!! ** Method : Initialization of arrays at the first call.
	61	!!
[1218]	62	!! ** Action : - px2 : first componante (defined at u point)
[3]	63	!! - py2 : second componante (defined at v point)
	64	!!----------------------------------------------------------------------
[1218]	65	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: pxu1, pyu1 ! geographic vector componantes at u-point
	66	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: pxv1, pyv1 ! geographic vector componantes at v-point
	67	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: px2 ! i-componante (defined at u-point)
	68	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: py2 ! j-componante (defined at v-point)
[3]	69	!!----------------------------------------------------------------------
[672]	70
	71	! Change from geographic to stretched coordinate
	72	! ----------------------------------------------
[685]	73	CALL rot_rep( pxu1, pyu1, 'U', 'en->i',px2 )
	74	CALL rot_rep( pxv1, pyv1, 'V', 'en->j',py2 )
[672]	75
	76	END SUBROUTINE repcmo
[3]	77
	78
[685]	79	SUBROUTINE rot_rep ( pxin, pyin, cd_type, cdtodo, prot )
[672]	80	!!----------------------------------------------------------------------
	81	!! * ROUTINE rot_rep *
	82	!!
	83	!! ** Purpose : Rotate the Repere: Change vector componantes between
	84	!! geographic grid <--> stretched coordinates grid.
	85	!!
	86	!! History :
	87	!! 9.2 ! 07-04 (S. Masson)
	88	!! (O. Marti ) Original code (repere and repcmo)
	89	!!----------------------------------------------------------------------
	90	REAL(wp), DIMENSION(jpi,jpj), INTENT( IN ) :: pxin, pyin ! vector componantes
	91	CHARACTER(len=1), INTENT( IN ) :: cd_type ! define the nature of pt2d array grid-points
	92	CHARACTER(len=5), INTENT( IN ) :: cdtodo ! specify the work to do:
	93	!! ! 'en->i' east-north componantes to model i componante
	94	!! ! 'en->j' east-north componantes to model j componante
	95	!! ! 'ij->e' model i-j componantes to east componante
	96	!! ! 'ij->n' model i-j componantes to east componante
[685]	97	REAL(wp), DIMENSION(jpi,jpj), INTENT(out) :: prot
[672]	98	!!----------------------------------------------------------------------
	99
[3]	100	! Initialization of gsin* and gcos* at first call
	101	! -----------------------------------------------
	102
[672]	103	IF( lmust_init ) THEN
[3]	104	IF(lwp) WRITE(numout,*)
[672]	105	IF(lwp) WRITE(numout,*) ' rot_rep : geographic <--> stretched'
	106	IF(lwp) WRITE(numout,*) ' ~~~~~ coordinate transformation'
[2715]	107	!
[3]	108	CALL angle ! initialization of the transformation
[672]	109	lmust_init = .FALSE.
[3]	110	ENDIF
	111
[672]	112	SELECT CASE (cdtodo)
	113	CASE ('en->i') ! 'en->i' est-north componantes to model i componante
	114	SELECT CASE (cd_type)
[685]	115	CASE ('T') ; prot(:,:) = pxin(:,:) * gcost(:,:) + pyin(:,:) * gsint(:,:)
	116	CASE ('U') ; prot(:,:) = pxin(:,:) * gcosu(:,:) + pyin(:,:) * gsinu(:,:)
	117	CASE ('V') ; prot(:,:) = pxin(:,:) * gcosv(:,:) + pyin(:,:) * gsinv(:,:)
	118	CASE ('F') ; prot(:,:) = pxin(:,:) * gcosf(:,:) + pyin(:,:) * gsinf(:,:)
[672]	119	CASE DEFAULT ; CALL ctl_stop( 'Only T, U, V and F grid points are coded' )
	120	END SELECT
	121	CASE ('en->j') ! 'en->j' est-north componantes to model j componante
	122	SELECT CASE (cd_type)
[685]	123	CASE ('T') ; prot(:,:) = pyin(:,:) * gcost(:,:) - pxin(:,:) * gsint(:,:)
	124	CASE ('U') ; prot(:,:) = pyin(:,:) * gcosu(:,:) - pxin(:,:) * gsinu(:,:)
	125	CASE ('V') ; prot(:,:) = pyin(:,:) * gcosv(:,:) - pxin(:,:) * gsinv(:,:)
	126	CASE ('F') ; prot(:,:) = pyin(:,:) * gcosf(:,:) - pxin(:,:) * gsinf(:,:)
[672]	127	CASE DEFAULT ; CALL ctl_stop( 'Only T, U, V and F grid points are coded' )
	128	END SELECT
	129	CASE ('ij->e') ! 'ij->e' model i-j componantes to est componante
	130	SELECT CASE (cd_type)
[685]	131	CASE ('T') ; prot(:,:) = pxin(:,:) * gcost(:,:) - pyin(:,:) * gsint(:,:)
	132	CASE ('U') ; prot(:,:) = pxin(:,:) * gcosu(:,:) - pyin(:,:) * gsinu(:,:)
	133	CASE ('V') ; prot(:,:) = pxin(:,:) * gcosv(:,:) - pyin(:,:) * gsinv(:,:)
	134	CASE ('F') ; prot(:,:) = pxin(:,:) * gcosf(:,:) - pyin(:,:) * gsinf(:,:)
[672]	135	CASE DEFAULT ; CALL ctl_stop( 'Only T, U, V and F grid points are coded' )
	136	END SELECT
	137	CASE ('ij->n') ! 'ij->n' model i-j componantes to est componante
	138	SELECT CASE (cd_type)
[685]	139	CASE ('T') ; prot(:,:) = pyin(:,:) * gcost(:,:) + pxin(:,:) * gsint(:,:)
	140	CASE ('U') ; prot(:,:) = pyin(:,:) * gcosu(:,:) + pxin(:,:) * gsinu(:,:)
	141	CASE ('V') ; prot(:,:) = pyin(:,:) * gcosv(:,:) + pxin(:,:) * gsinv(:,:)
	142	CASE ('F') ; prot(:,:) = pyin(:,:) * gcosf(:,:) + pxin(:,:) * gsinf(:,:)
[672]	143	CASE DEFAULT ; CALL ctl_stop( 'Only T, U, V and F grid points are coded' )
	144	END SELECT
	145	CASE DEFAULT ; CALL ctl_stop( 'rot_rep: Syntax Error in the definition of cdtodo' )
	146	END SELECT
[3]	147
[685]	148	END SUBROUTINE rot_rep
[3]	149
	150
	151	SUBROUTINE angle
	152	!!----------------------------------------------------------------------
	153	!! * ROUTINE angle *
	154	!!
[672]	155	!! ** Purpose : Compute angles between model grid lines and the North direction
[3]	156	!!
	157	!! ** Method :
	158	!!
[672]	159	!! ** Action : Compute (gsint, gcost, gsinu, gcosu, gsinv, gcosv, gsinf, gcosf) arrays:
	160	!! sinus and cosinus of the angle between the north-south axe and the
	161	!! j-direction at t, u, v and f-points
[3]	162	!!
	163	!! History :
[672]	164	!! 7.0 ! 96-07 (O. Marti ) Original code
	165	!! 8.0 ! 98-06 (G. Madec )
	166	!! 8.5 ! 98-06 (G. Madec ) Free form, F90 + opt.
	167	!! 9.2 ! 07-04 (S. Masson) Add T, F points and bugfix in cos lateral boundary
[3]	168	!!----------------------------------------------------------------------
[2715]	169	INTEGER :: ji, jj ! dummy loop indices
	170	INTEGER :: ierr ! local integer
[3]	171	REAL(wp) :: &
[672]	172	zlam, zphi, & ! temporary scalars
	173	zlan, zphh, & ! " "
	174	zxnpt, zynpt, znnpt, & ! x,y components and norm of the vector: T point to North Pole
	175	zxnpu, zynpu, znnpu, & ! x,y components and norm of the vector: U point to North Pole
	176	zxnpv, zynpv, znnpv, & ! x,y components and norm of the vector: V point to North Pole
	177	zxnpf, zynpf, znnpf, & ! x,y components and norm of the vector: F point to North Pole
	178	zxvvt, zyvvt, znvvt, & ! x,y components and norm of the vector: between V points below and above a T point
	179	zxffu, zyffu, znffu, & ! x,y components and norm of the vector: between F points below and above a U point
	180	zxffv, zyffv, znffv, & ! x,y components and norm of the vector: between F points left and right a V point
	181	zxuuf, zyuuf, znuuf ! x,y components and norm of the vector: between U points below and above a F point
[3]	182	!!----------------------------------------------------------------------
	183
[2715]	184	ALLOCATE( gsint(jpi,jpj), gcost(jpi,jpj), &
	185	& gsinu(jpi,jpj), gcosu(jpi,jpj), &
	186	& gsinv(jpi,jpj), gcosv(jpi,jpj), &
	187	& gsinf(jpi,jpj), gcosf(jpi,jpj), STAT=ierr )
	188	IF(lk_mpp) CALL mpp_sum( ierr )
[4162]	189	IF( ierr /= 0 ) CALL ctl_stop('angle: unable to allocate arrays' )
[2715]	190
[3]	191	! ============================= !
	192	! Compute the cosinus and sinus !
	193	! ============================= !
	194	! (computation done on the north stereographic polar plane)
	195
[672]	196	DO jj = 2, jpjm1
[3]	197	DO ji = fs_2, jpi ! vector opt.
	198
[672]	199	! north pole direction & modulous (at t-point)
	200	zlam = glamt(ji,jj)
	201	zphi = gphit(ji,jj)
	202	zxnpt = 0. - 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	203	zynpt = 0. - 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	204	znnpt = zxnptzxnpt + zynptzynpt
	205
[3]	206	! north pole direction & modulous (at u-point)
	207	zlam = glamu(ji,jj)
	208	zphi = gphiu(ji,jj)
	209	zxnpu = 0. - 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	210	zynpu = 0. - 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	211	znnpu = zxnpuzxnpu + zynpuzynpu
	212
	213	! north pole direction & modulous (at v-point)
	214	zlam = glamv(ji,jj)
	215	zphi = gphiv(ji,jj)
	216	zxnpv = 0. - 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	217	zynpv = 0. - 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	218	znnpv = zxnpvzxnpv + zynpvzynpv
	219
[672]	220	! north pole direction & modulous (at f-point)
	221	zlam = glamf(ji,jj)
	222	zphi = gphif(ji,jj)
	223	zxnpf = 0. - 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	224	zynpf = 0. - 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. )
	225	znnpf = zxnpfzxnpf + zynpfzynpf
	226
	227	! j-direction: v-point segment direction (around t-point)
	228	zlam = glamv(ji,jj )
	229	zphi = gphiv(ji,jj )
	230	zlan = glamv(ji,jj-1)
	231	zphh = gphiv(ji,jj-1)
	232	zxvvt = 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	233	& - 2. * COS( radzlan ) TAN( rpi/4. - rad*zphh/2. )
	234	zyvvt = 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	235	& - 2. * SIN( radzlan ) TAN( rpi/4. - rad*zphh/2. )
	236	znvvt = SQRT( znnpt * ( zxvvtzxvvt + zyvvtzyvvt ) )
	237	znvvt = MAX( znvvt, 1.e-14 )
	238
	239	! j-direction: f-point segment direction (around u-point)
[3]	240	zlam = glamf(ji,jj )
	241	zphi = gphif(ji,jj )
	242	zlan = glamf(ji,jj-1)
	243	zphh = gphif(ji,jj-1)
	244	zxffu = 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	245	& - 2. * COS( radzlan ) TAN( rpi/4. - rad*zphh/2. )
	246	zyffu = 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	247	& - 2. * SIN( radzlan ) TAN( rpi/4. - rad*zphh/2. )
[672]	248	znffu = SQRT( znnpu * ( zxffuzxffu + zyffuzyffu ) )
	249	znffu = MAX( znffu, 1.e-14 )
[3]	250
[672]	251	! i-direction: f-point segment direction (around v-point)
[3]	252	zlam = glamf(ji ,jj)
	253	zphi = gphif(ji ,jj)
	254	zlan = glamf(ji-1,jj)
	255	zphh = gphif(ji-1,jj)
	256	zxffv = 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	257	& - 2. * COS( radzlan ) TAN( rpi/4. - rad*zphh/2. )
	258	zyffv = 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	259	& - 2. * SIN( radzlan ) TAN( rpi/4. - rad*zphh/2. )
[672]	260	znffv = SQRT( znnpv * ( zxffvzxffv + zyffvzyffv ) )
	261	znffv = MAX( znffv, 1.e-14 )
[3]	262
[672]	263	! j-direction: u-point segment direction (around f-point)
	264	zlam = glamu(ji,jj+1)
	265	zphi = gphiu(ji,jj+1)
	266	zlan = glamu(ji,jj )
	267	zphh = gphiu(ji,jj )
	268	zxuuf = 2. * COS( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	269	& - 2. * COS( radzlan ) TAN( rpi/4. - rad*zphh/2. )
	270	zyuuf = 2. * SIN( radzlam ) TAN( rpi/4. - rad*zphi/2. ) &
	271	& - 2. * SIN( radzlan ) TAN( rpi/4. - rad*zphh/2. )
	272	znuuf = SQRT( znnpf * ( zxuufzxuuf + zyuufzyuuf ) )
	273	znuuf = MAX( znuuf, 1.e-14 )
	274
[3]	275	! cosinus and sinus using scalar and vectorial products
[672]	276	gsint(ji,jj) = ( zxnptzyvvt - zynptzxvvt ) / znvvt
	277	gcost(ji,jj) = ( zxnptzxvvt + zynptzyvvt ) / znvvt
[3]	278
[672]	279	gsinu(ji,jj) = ( zxnpuzyffu - zynpuzxffu ) / znffu
	280	gcosu(ji,jj) = ( zxnpuzxffu + zynpuzyffu ) / znffu
	281
	282	gsinf(ji,jj) = ( zxnpfzyuuf - zynpfzxuuf ) / znuuf
	283	gcosf(ji,jj) = ( zxnpfzxuuf + zynpfzyuuf ) / znuuf
	284
[3]	285	! (caution, rotation of 90 degres)
[672]	286	gsinv(ji,jj) = ( zxnpvzxffv + zynpvzyffv ) / znffv
	287	gcosv(ji,jj) =-( zxnpvzyffv - zynpvzxffv ) / znffv
[3]	288
	289	END DO
	290	END DO
	291
	292	! =============== !
	293	! Geographic mesh !
	294	! =============== !
	295
[672]	296	DO jj = 2, jpjm1
[3]	297	DO ji = fs_2, jpi ! vector opt.
[672]	298	IF( MOD( ABS( glamv(ji,jj) - glamv(ji,jj-1) ), 360. ) < 1.e-8 ) THEN
	299	gsint(ji,jj) = 0.
	300	gcost(ji,jj) = 1.
	301	ENDIF
	302	IF( MOD( ABS( glamf(ji,jj) - glamf(ji,jj-1) ), 360. ) < 1.e-8 ) THEN
[3]	303	gsinu(ji,jj) = 0.
	304	gcosu(ji,jj) = 1.
	305	ENDIF
[672]	306	IF( ABS( gphif(ji,jj) - gphif(ji-1,jj) ) < 1.e-8 ) THEN
[3]	307	gsinv(ji,jj) = 0.
	308	gcosv(ji,jj) = 1.
	309	ENDIF
[672]	310	IF( MOD( ABS( glamu(ji,jj) - glamu(ji,jj+1) ), 360. ) < 1.e-8 ) THEN
	311	gsinf(ji,jj) = 0.
	312	gcosf(ji,jj) = 1.
	313	ENDIF
[3]	314	END DO
	315	END DO
	316
	317	! =========================== !
	318	! Lateral boundary conditions !
	319	! =========================== !
	320
[672]	321	! lateral boundary cond.: T-, U-, V-, F-pts, sgn
[1833]	322	CALL lbc_lnk( gcost, 'T', -1. ) ; CALL lbc_lnk( gsint, 'T', -1. )
	323	CALL lbc_lnk( gcosu, 'U', -1. ) ; CALL lbc_lnk( gsinu, 'U', -1. )
	324	CALL lbc_lnk( gcosv, 'V', -1. ) ; CALL lbc_lnk( gsinv, 'V', -1. )
	325	CALL lbc_lnk( gcosf, 'F', -1. ) ; CALL lbc_lnk( gsinf, 'F', -1. )
[3]	326
	327	END SUBROUTINE angle
	328
	329
[1218]	330	SUBROUTINE geo2oce ( pxx, pyy, pzz, cgrid, &
	331	pte, ptn )
[3]	332	!!----------------------------------------------------------------------
	333	!! * ROUTINE geo2oce *
	334	!!
	335	!! ** Purpose :
	336	!!
	337	!! ** Method : Change wind stress from geocentric to east/north
	338	!!
	339	!! History :
	340	!! ! (O. Marti) Original code
	341	!! ! 91-03 (G. Madec)
	342	!! ! 92-07 (M. Imbard)
	343	!! ! 99-11 (M. Imbard) NetCDF format with IOIPSL
	344	!! ! 00-08 (D. Ludicone) Reduced section at Bab el Mandeb
	345	!! 8.5 ! 02-06 (G. Madec) F90: Free form
[1218]	346	!! 3.0 ! 07-08 (G. Madec) geo2oce suppress lon/lat agruments
[3]	347	!!----------------------------------------------------------------------
[1218]	348	REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: pxx, pyy, pzz
	349	CHARACTER(len=1) , INTENT(in ) :: cgrid
	350	REAL(wp), DIMENSION(jpi,jpj), INTENT( out) :: pte, ptn
	351	!!
[2715]	352	REAL(wp), PARAMETER :: rpi = 3.141592653e0
[88]	353	REAL(wp), PARAMETER :: rad = rpi / 180.e0
[1218]	354	INTEGER :: ig !
[2715]	355	INTEGER :: ierr ! local integer
[1218]	356	!!----------------------------------------------------------------------
[3]	357
[2715]	358	IF( .NOT. ALLOCATED( gsinlon ) ) THEN
	359	ALLOCATE( gsinlon(jpi,jpj,4) , gcoslon(jpi,jpj,4) , &
	360	& gsinlat(jpi,jpj,4) , gcoslat(jpi,jpj,4) , STAT=ierr )
	361	IF( lk_mpp ) CALL mpp_sum( ierr )
[4162]	362	IF( ierr /= 0 ) CALL ctl_stop('geo2oce: unable to allocate arrays' )
[2715]	363	ENDIF
	364
[1218]	365	SELECT CASE( cgrid)
[1226]	366	CASE ( 'T' )
[1218]	367	ig = 1
	368	IF( .NOT. linit(ig) ) THEN
[2715]	369	gsinlon(:,:,ig) = SIN( rad * glamt(:,:) )
	370	gcoslon(:,:,ig) = COS( rad * glamt(:,:) )
	371	gsinlat(:,:,ig) = SIN( rad * gphit(:,:) )
	372	gcoslat(:,:,ig) = COS( rad * gphit(:,:) )
[1226]	373	linit(ig) = .TRUE.
[1218]	374	ENDIF
[1226]	375	CASE ( 'U' )
[1218]	376	ig = 2
	377	IF( .NOT. linit(ig) ) THEN
[2715]	378	gsinlon(:,:,ig) = SIN( rad * glamu(:,:) )
	379	gcoslon(:,:,ig) = COS( rad * glamu(:,:) )
	380	gsinlat(:,:,ig) = SIN( rad * gphiu(:,:) )
	381	gcoslat(:,:,ig) = COS( rad * gphiu(:,:) )
[1226]	382	linit(ig) = .TRUE.
[1218]	383	ENDIF
[1226]	384	CASE ( 'V' )
[1218]	385	ig = 3
	386	IF( .NOT. linit(ig) ) THEN
[2715]	387	gsinlon(:,:,ig) = SIN( rad * glamv(:,:) )
	388	gcoslon(:,:,ig) = COS( rad * glamv(:,:) )
	389	gsinlat(:,:,ig) = SIN( rad * gphiv(:,:) )
	390	gcoslat(:,:,ig) = COS( rad * gphiv(:,:) )
[1226]	391	linit(ig) = .TRUE.
[1218]	392	ENDIF
[1226]	393	CASE ( 'F' )
[1218]	394	ig = 4
	395	IF( .NOT. linit(ig) ) THEN
[2715]	396	gsinlon(:,:,ig) = SIN( rad * glamf(:,:) )
	397	gcoslon(:,:,ig) = COS( rad * glamf(:,:) )
	398	gsinlat(:,:,ig) = SIN( rad * gphif(:,:) )
	399	gcoslat(:,:,ig) = COS( rad * gphif(:,:) )
[1226]	400	linit(ig) = .TRUE.
[1218]	401	ENDIF
	402	CASE default
	403	WRITE(ctmp1,*) 'geo2oce : bad grid argument : ', cgrid
	404	CALL ctl_stop( ctmp1 )
	405	END SELECT
	406
[2715]	407	pte = - gsinlon(:,:,ig) * pxx + gcoslon(:,:,ig) * pyy
	408	ptn = - gcoslon(:,:,ig) * gsinlat(:,:,ig) * pxx &
	409	- gsinlon(:,:,ig) * gsinlat(:,:,ig) * pyy &
	410	+ gcoslat(:,:,ig) * pzz
	411	!!$ ptv = gcoslon(:,:,ig) * gcoslat(:,:,ig) * pxx &
	412	!!$ + gsinlon(:,:,ig) * gcoslat(:,:,ig) * pyy &
	413	!!$ + gsinlat(:,:,ig) * pzz
[1218]	414	!
	415	END SUBROUTINE geo2oce
	416
	417	SUBROUTINE oce2geo ( pte, ptn, cgrid, &
[1226]	418	pxx , pyy , pzz )
[1218]	419	!!----------------------------------------------------------------------
	420	!! * ROUTINE oce2geo *
	421	!!
	422	!! ** Purpose :
	423	!!
	424	!! ** Method : Change vector from east/north to geocentric
	425	!!
	426	!! History :
	427	!! ! (A. Caubel) oce2geo - Original code
	428	!!----------------------------------------------------------------------
	429	REAL(wp), DIMENSION(jpi,jpj), INTENT( IN ) :: pte, ptn
	430	CHARACTER(len=1) , INTENT( IN ) :: cgrid
	431	REAL(wp), DIMENSION(jpi,jpj), INTENT( OUT ) :: pxx , pyy , pzz
	432	!!
	433	REAL(wp), PARAMETER :: rpi = 3.141592653E0
	434	REAL(wp), PARAMETER :: rad = rpi / 180.e0
[3]	435	INTEGER :: ig !
[2715]	436	INTEGER :: ierr ! local integer
[3]	437	!!----------------------------------------------------------------------
	438
[4162]	439	IF( .NOT. ALLOCATED( gsinlon ) ) THEN
[2715]	440	ALLOCATE( gsinlon(jpi,jpj,4) , gcoslon(jpi,jpj,4) , &
	441	& gsinlat(jpi,jpj,4) , gcoslat(jpi,jpj,4) , STAT=ierr )
	442	IF( lk_mpp ) CALL mpp_sum( ierr )
[4162]	443	IF( ierr /= 0 ) CALL ctl_stop('oce2geo: unable to allocate arrays' )
[2715]	444	ENDIF
	445
[3]	446	SELECT CASE( cgrid)
[1226]	447	CASE ( 'T' )
	448	ig = 1
	449	IF( .NOT. linit(ig) ) THEN
[2715]	450	gsinlon(:,:,ig) = SIN( rad * glamt(:,:) )
	451	gcoslon(:,:,ig) = COS( rad * glamt(:,:) )
	452	gsinlat(:,:,ig) = SIN( rad * gphit(:,:) )
	453	gcoslat(:,:,ig) = COS( rad * gphit(:,:) )
[1226]	454	linit(ig) = .TRUE.
	455	ENDIF
	456	CASE ( 'U' )
	457	ig = 2
	458	IF( .NOT. linit(ig) ) THEN
[2715]	459	gsinlon(:,:,ig) = SIN( rad * glamu(:,:) )
	460	gcoslon(:,:,ig) = COS( rad * glamu(:,:) )
	461	gsinlat(:,:,ig) = SIN( rad * gphiu(:,:) )
	462	gcoslat(:,:,ig) = COS( rad * gphiu(:,:) )
[1226]	463	linit(ig) = .TRUE.
	464	ENDIF
	465	CASE ( 'V' )
	466	ig = 3
	467	IF( .NOT. linit(ig) ) THEN
[2715]	468	gsinlon(:,:,ig) = SIN( rad * glamv(:,:) )
	469	gcoslon(:,:,ig) = COS( rad * glamv(:,:) )
	470	gsinlat(:,:,ig) = SIN( rad * gphiv(:,:) )
	471	gcoslat(:,:,ig) = COS( rad * gphiv(:,:) )
[1226]	472	linit(ig) = .TRUE.
	473	ENDIF
	474	CASE ( 'F' )
	475	ig = 4
	476	IF( .NOT. linit(ig) ) THEN
[2715]	477	gsinlon(:,:,ig) = SIN( rad * glamf(:,:) )
	478	gcoslon(:,:,ig) = COS( rad * glamf(:,:) )
	479	gsinlat(:,:,ig) = SIN( rad * gphif(:,:) )
	480	gcoslat(:,:,ig) = COS( rad * gphif(:,:) )
[1226]	481	linit(ig) = .TRUE.
	482	ENDIF
	483	CASE default
	484	WRITE(ctmp1,*) 'geo2oce : bad grid argument : ', cgrid
[474]	485	CALL ctl_stop( ctmp1 )
[1226]	486	END SELECT
	487
[2715]	488	pxx = - gsinlon(:,:,ig) * pte - gcoslon(:,:,ig) * gsinlat(:,:,ig) * ptn
	489	pyy = gcoslon(:,:,ig) * pte - gsinlon(:,:,ig) * gsinlat(:,:,ig) * ptn
	490	pzz = gcoslat(:,:,ig) * ptn
[1226]	491
[3]	492
[1218]	493	END SUBROUTINE oce2geo
[3]	494
	495
[672]	496	SUBROUTINE repere ( px1, py1, px2, py2, kchoix, cd_type )
[3]	497	!!----------------------------------------------------------------------
	498	!! * ROUTINE repere *
	499	!!
	500	!! ** Purpose : Change vector componantes between a geopgraphic grid
	501	!! and a stretched coordinates grid.
	502	!!
[672]	503	!! ** Method :
[3]	504	!!
	505	!! ** Action :
	506	!!
	507	!! History :
	508	!! ! 89-03 (O. Marti) original code
	509	!! ! 92-02 (M. Imbard)
	510	!! ! 93-03 (M. Guyon) symetrical conditions
	511	!! ! 98-05 (B. Blanke)
	512	!! 8.5 ! 02-08 (G. Madec) F90: Free form
	513	!!----------------------------------------------------------------------
[2715]	514	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: px1, py1 ! two horizontal components to be rotated
	515	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: px2, py2 ! the two horizontal components in the model repere
	516	INTEGER , INTENT(in ) :: kchoix ! type of transformation
	517	! ! = 1 change from geographic to model grid.
	518	! ! =-1 change from model to geographic grid
	519	CHARACTER(len=1), INTENT(in ), OPTIONAL :: cd_type ! define the nature of pt2d array grid-points
[672]	520	!
	521	CHARACTER(len=1) :: cl_type ! define the nature of pt2d array grid-points (T point by default)
[3]	522	!!----------------------------------------------------------------------
	523
[672]	524	cl_type = 'T'
	525	IF( PRESENT(cd_type) ) cl_type = cd_type
	526	!
	527	SELECT CASE (kchoix)
	528	CASE ( 1) ! change from geographic to model grid.
[685]	529	CALL rot_rep( px1, py1, cl_type, 'en->i', px2 )
	530	CALL rot_rep( px1, py1, cl_type, 'en->j', py2 )
[672]	531	CASE (-1) ! change from model to geographic grid
[685]	532	CALL rot_rep( px1, py1, cl_type, 'ij->e', px2 )
	533	CALL rot_rep( px1, py1, cl_type, 'ij->n', py2 )
[672]	534	CASE DEFAULT ; CALL ctl_stop( 'repere: Syntax Error in the definition of kchoix (1 OR -1' )
	535	END SELECT
[3]	536
	537	END SUBROUTINE repere
	538
[2528]	539
	540	SUBROUTINE obs_rot ( psinu, pcosu, psinv, pcosv )
	541	!!----------------------------------------------------------------------
	542	!! * ROUTINE obs_rot *
	543	!!
	544	!! ** Purpose : Copy gsinu, gcosu, gsinv and gsinv
	545	!! to input data for rotations of
	546	!! current at observation points
	547	!!
	548	!! History :
	549	!! 9.2 ! 09-02 (K. Mogensen)
	550	!!----------------------------------------------------------------------
[2715]	551	REAL(wp), DIMENSION(jpi,jpj), INTENT( OUT ):: psinu, pcosu, psinv, pcosv ! copy of data
[2528]	552	!!----------------------------------------------------------------------
	553
	554	! Initialization of gsin* and gcos* at first call
	555	! -----------------------------------------------
	556
	557	IF( lmust_init ) THEN
	558	IF(lwp) WRITE(numout,*)
	559	IF(lwp) WRITE(numout,*) ' obs_rot : geographic <--> stretched'
	560	IF(lwp) WRITE(numout,*) ' ~~~~~~~ coordinate transformation'
	561
	562	CALL angle ! initialization of the transformation
	563	lmust_init = .FALSE.
	564
	565	ENDIF
	566
	567	psinu(:,:) = gsinu(:,:)
	568	pcosu(:,:) = gcosu(:,:)
	569	psinv(:,:) = gsinv(:,:)
	570	pcosv(:,:) = gcosv(:,:)
	571
	572	END SUBROUTINE obs_rot
	573
[3]	574	!!======================================================================
	575	END MODULE geo2ocean

Note: See TracBrowser for help on using the repository browser.

Download in other formats: