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diahth.F90 in NEMO/trunk/src/OCE/DIA – NEMO

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source: NEMO/trunk/src/OCE/DIA/diahth.F90 @ 12276

Last change on this file since 12276 was 12276, checked in by cetlod, 4 years ago
trunk : merge in some cmip6 diagnostics into the trunk before copying it to release-4.0.2(-head). SETTE tests are OK and the is no difference with the revision 12248
Property svn:keywords set to `Id`
File size: 18.7 KB

Rev	Line
[3]	1	MODULE diahth
	2	!!======================================================================
	3	!! * MODULE diahth *
	4	!! Ocean diagnostics: thermocline and 20 degree depth
	5	!!======================================================================
[1485]	6	!! History : OPA ! 1994-09 (J.-P. Boulanger) Original code
	7	!! ! 1996-11 (E. Guilyardi) OPA8
	8	!! ! 1997-08 (G. Madec) optimization
	9	!! ! 1999-07 (E. Guilyardi) hd28 + heat content
[5836]	10	!! NEMO 1.0 ! 2002-06 (G. Madec) F90: Free form and module
	11	!! 3.2 ! 2009-07 (S. Masson) hc300 bugfix + cleaning + add new diag
[1485]	12	!!----------------------------------------------------------------------
[1577]	13	!! dia_hth : Compute varius diagnostics associated with the mixed layer
[3]	14	!!----------------------------------------------------------------------
	15	USE oce ! ocean dynamics and tracers
	16	USE dom_oce ! ocean space and time domain
	17	USE phycst ! physical constants
[6140]	18	!
[3]	19	USE in_out_manager ! I/O manager
[2715]	20	USE lib_mpp ! MPP library
[2528]	21	USE iom ! I/O library
[3294]	22	USE timing ! preformance summary
[3]	23
	24	IMPLICIT NONE
	25	PRIVATE
	26
[2715]	27	PUBLIC dia_hth ! routine called by step.F90
	28	PUBLIC dia_hth_alloc ! routine called by nemogcm.F90
[3]	29
[12276]	30	LOGICAL, SAVE :: l_hth !: thermocline-20d depths flag
[6140]	31
[1577]	32	! note: following variables should move to local variables once iom_put is always used
[2715]	33	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hth !: depth of the max vertical temperature gradient [m]
	34	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hd20 !: depth of 20 C isotherm [m]
[12276]	35	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hd26 !: depth of 26 C isotherm [m]
[2715]	36	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hd28 !: depth of 28 C isotherm [m]
	37	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: htc3 !: heat content of first 300 m [W]
[12276]	38	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: htc7 !: heat content of first 700 m [W]
	39	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: htc20 !: heat content of first 2000 m [W]
[3]	40
[12276]	41
[3]	42	!!----------------------------------------------------------------------
[9598]	43	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
[1152]	44	!! $Id$
[10068]	45	!! Software governed by the CeCILL license (see ./LICENSE)
[3]	46	!!----------------------------------------------------------------------
	47	CONTAINS
	48
[2715]	49	FUNCTION dia_hth_alloc()
	50	!!---------------------------------------------------------------------
	51	INTEGER :: dia_hth_alloc
	52	!!---------------------------------------------------------------------
	53	!
[12276]	54	ALLOCATE( hth(jpi,jpj), hd20(jpi,jpj), hd26(jpi,jpj), hd28(jpi,jpj), &
	55	& htc3(jpi,jpj), htc7(jpi,jpj), htc20(jpi,jpj), STAT=dia_hth_alloc )
[2715]	56	!
[10425]	57	CALL mpp_sum ( 'diahth', dia_hth_alloc )
	58	IF(dia_hth_alloc /= 0) CALL ctl_stop( 'STOP', 'dia_hth_alloc: failed to allocate arrays.' )
[2715]	59	!
	60	END FUNCTION dia_hth_alloc
	61
	62
[3]	63	SUBROUTINE dia_hth( kt )
	64	!!---------------------------------------------------------------------
	65	!! * ROUTINE dia_hth *
	66	!!
[1577]	67	!! ** Purpose : Computes
	68	!! the mixing layer depth (turbocline): avt = 5.e-4
	69	!! the depth of strongest vertical temperature gradient
	70	!! the mixed layer depth with density criteria: rho = rho(10m or surf) + 0.03(or 0.01)
	71	!! the mixed layer depth with temperature criteria: abs( tn - tn(10m) ) = 0.2
	72	!! the top of the thermochine: tn = tn(10m) - ztem2
	73	!! the pycnocline depth with density criteria equivalent to a temperature variation
	74	!! rho = rho10m + (dr/dT)(T,S,10m)*(-0.2 degC)
	75	!! the barrier layer thickness
	76	!! the maximal verical inversion of temperature and its depth max( 0, max of tn - tn(10m) )
	77	!! the depth of the 20 degree isotherm (linear interpolation)
	78	!! the depth of the 28 degree isotherm (linear interpolation)
	79	!! the heat content of first 300 m
[3]	80	!!
	81	!! ** Method :
	82	!!-------------------------------------------------------------------
	83	INTEGER, INTENT( in ) :: kt ! ocean time-step index
[1485]	84	!!
[12276]	85	INTEGER :: ji, jj, jk ! dummy loop arguments
	86	REAL(wp) :: zrho3 = 0.03_wp ! density criterion for mixed layer depth
	87	REAL(wp) :: zrho1 = 0.01_wp ! density criterion for mixed layer depth
	88	REAL(wp) :: ztem2 = 0.2_wp ! temperature criterion for mixed layer depth
	89	REAL(wp) :: zztmp, zzdep ! temporary scalars inside do loop
	90	REAL(wp) :: zu, zv, zw, zut, zvt ! temporary workspace
	91	REAL(wp), DIMENSION(jpi,jpj) :: zabs2 ! MLD: abs( tn - tn(10m) ) = ztem2
	92	REAL(wp), DIMENSION(jpi,jpj) :: ztm2 ! Top of thermocline: tn = tn(10m) - ztem2
	93	REAL(wp), DIMENSION(jpi,jpj) :: zrho10_3 ! MLD: rho = rho10m + zrho3
	94	REAL(wp), DIMENSION(jpi,jpj) :: zpycn ! pycnocline: rho = rho10m + (dr/dT)(T,S,10m)*(-0.2 degC)
	95	REAL(wp), DIMENSION(jpi,jpj) :: ztinv ! max of temperature inversion
	96	REAL(wp), DIMENSION(jpi,jpj) :: zdepinv ! depth of temperature inversion
	97	REAL(wp), DIMENSION(jpi,jpj) :: zrho0_3 ! MLD rho = rho(surf) = 0.03
	98	REAL(wp), DIMENSION(jpi,jpj) :: zrho0_1 ! MLD rho = rho(surf) = 0.01
	99	REAL(wp), DIMENSION(jpi,jpj) :: zmaxdzT ! max of dT/dz
	100	REAL(wp), DIMENSION(jpi,jpj) :: zdelr ! delta rho equivalent to deltaT = 0.2
[3]	101	!!----------------------------------------------------------------------
[9124]	102	IF( ln_timing ) CALL timing_start('dia_hth')
[3]	103
	104	IF( kt == nit000 ) THEN
[12276]	105	l_hth = .FALSE.
	106	IF( iom_use( 'mlddzt' ) .OR. iom_use( 'mldr0_3' ) .OR. iom_use( 'mldr0_1' ) .OR. &
	107	& iom_use( 'mld_dt02' ) .OR. iom_use( 'topthdep' ) .OR. iom_use( 'mldr10_3' ) .OR. &
	108	& iom_use( '20d' ) .OR. iom_use( '26d' ) .OR. iom_use( '28d' ) .OR. &
	109	& iom_use( 'hc300' ) .OR. iom_use( 'hc700' ) .OR. iom_use( 'hc2000' ) .OR. &
	110	& iom_use( 'pycndep' ) .OR. iom_use( 'tinv' ) .OR. iom_use( 'depti' ) ) l_hth = .TRUE.
[2715]	111	! ! allocate dia_hth array
[12276]	112	IF( l_hth ) THEN
	113	IF( dia_hth_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'dia_hth : unable to allocate standard arrays' )
	114	IF(lwp) WRITE(numout,*)
	115	IF(lwp) WRITE(numout,*) 'dia_hth : diagnostics of the thermocline depth'
	116	IF(lwp) WRITE(numout,*) '~~~~~~~ '
	117	IF(lwp) WRITE(numout,*)
	118	ENDIF
[3]	119	ENDIF
	120
[12276]	121	IF( l_hth ) THEN
	122	!
	123	IF( iom_use( 'mlddzt' ) .OR. iom_use( 'mldr0_3' ) .OR. iom_use( 'mldr0_1' ) ) THEN
	124	! initialization
	125	ztinv (:,:) = 0._wp
	126	zdepinv(:,:) = 0._wp
	127	zmaxdzT(:,:) = 0._wp
	128	DO jj = 1, jpj
	129	DO ji = 1, jpi
	130	zztmp = gdepw_n(ji,jj,mbkt(ji,jj)+1)
	131	hth (ji,jj) = zztmp
	132	zabs2 (ji,jj) = zztmp
	133	ztm2 (ji,jj) = zztmp
	134	zrho10_3(ji,jj) = zztmp
	135	zpycn (ji,jj) = zztmp
	136	END DO
[1577]	137	END DO
[12276]	138	IF( nla10 > 1 ) THEN
	139	DO jj = 1, jpj
	140	DO ji = 1, jpi
	141	zztmp = gdepw_n(ji,jj,mbkt(ji,jj)+1)
	142	zrho0_3(ji,jj) = zztmp
	143	zrho0_1(ji,jj) = zztmp
	144	END DO
	145	END DO
	146	ENDIF
[11993]	147
[12276]	148	! Preliminary computation
	149	! computation of zdelr = (dr/dT)(T,S,10m)*(-0.2 degC)
	150	DO jj = 1, jpj
	151	DO ji = 1, jpi
	152	IF( tmask(ji,jj,nla10) == 1. ) THEN
	153	zu = 1779.50 + 11.250 * tsn(ji,jj,nla10,jp_tem) - 3.80 * tsn(ji,jj,nla10,jp_sal) &
	154	& - 0.0745 * tsn(ji,jj,nla10,jp_tem) * tsn(ji,jj,nla10,jp_tem) &
	155	& - 0.0100 * tsn(ji,jj,nla10,jp_tem) * tsn(ji,jj,nla10,jp_sal)
	156	zv = 5891.00 + 38.000 * tsn(ji,jj,nla10,jp_tem) + 3.00 * tsn(ji,jj,nla10,jp_sal) &
	157	& - 0.3750 * tsn(ji,jj,nla10,jp_tem) * tsn(ji,jj,nla10,jp_tem)
	158	zut = 11.25 - 0.149 * tsn(ji,jj,nla10,jp_tem) - 0.01 * tsn(ji,jj,nla10,jp_sal)
	159	zvt = 38.00 - 0.750 * tsn(ji,jj,nla10,jp_tem)
	160	zw = (zu + 0.698zv) (zu + 0.698*zv)
	161	zdelr(ji,jj) = ztem2 * (1000.(zutzv - zvt*zu)/zw)
	162	ELSE
	163	zdelr(ji,jj) = 0._wp
	164	ENDIF
	165	END DO
	166	END DO
[3]	167
[12276]	168	! ------------------------------------------------------------- !
	169	! thermocline depth: strongest vertical gradient of temperature !
	170	! turbocline depth (mixing layer depth): avt = zavt5 !
	171	! MLD: rho = rho(1) + zrho3 !
	172	! MLD: rho = rho(1) + zrho1 !
	173	! ------------------------------------------------------------- !
	174	DO jk = jpkm1, 2, -1 ! loop from bottom to 2
	175	DO jj = 1, jpj
	176	DO ji = 1, jpi
	177	!
	178	zzdep = gdepw_n(ji,jj,jk)
	179	zztmp = ( tsn(ji,jj,jk-1,jp_tem) - tsn(ji,jj,jk,jp_tem) ) &
	180	& / zzdep * tmask(ji,jj,jk) ! vertical gradient of temperature (dT/dz)
	181	zzdep = zzdep * tmask(ji,jj,1)
[1577]	182
[12276]	183	IF( zztmp > zmaxdzT(ji,jj) ) THEN
	184	zmaxdzT(ji,jj) = zztmp
	185	hth (ji,jj) = zzdep ! max and depth of dT/dz
	186	ENDIF
[1577]	187
[12276]	188	IF( nla10 > 1 ) THEN
	189	zztmp = rhop(ji,jj,jk) - rhop(ji,jj,1) ! delta rho(1)
	190	IF( zztmp > zrho3 ) zrho0_3(ji,jj) = zzdep ! > 0.03
	191	IF( zztmp > zrho1 ) zrho0_1(ji,jj) = zzdep ! > 0.01
	192	ENDIF
	193	END DO
	194	END DO
[1577]	195	END DO
[12276]	196
	197	CALL iom_put( 'mlddzt', hth ) ! depth of the thermocline
	198	IF( nla10 > 1 ) THEN
	199	CALL iom_put( 'mldr0_3', zrho0_3 ) ! MLD delta rho(surf) = 0.03
	200	CALL iom_put( 'mldr0_1', zrho0_1 ) ! MLD delta rho(surf) = 0.01
	201	ENDIF
	202	!
	203	ENDIF
	204	!
	205	IF( iom_use( 'mld_dt02' ) .OR. iom_use( 'topthdep' ) .OR. iom_use( 'mldr10_3' ) .OR. &
	206	& iom_use( 'pycndep' ) .OR. iom_use( 'tinv' ) .OR. iom_use( 'depti' ) ) THEN
	207	! ------------------------------------------------------------- !
	208	! MLD: abs( tn - tn(10m) ) = ztem2 !
	209	! Top of thermocline: tn = tn(10m) - ztem2 !
	210	! MLD: rho = rho10m + zrho3 !
	211	! pycnocline: rho = rho10m + (dr/dT)(T,S,10m)*(-0.2 degC) !
	212	! temperature inversion: max( 0, max of tn - tn(10m) ) !
	213	! depth of temperature inversion !
	214	! ------------------------------------------------------------- !
	215	DO jk = jpkm1, nlb10, -1 ! loop from bottom to nlb10
	216	DO jj = 1, jpj
	217	DO ji = 1, jpi
	218	!
	219	zzdep = gdepw_n(ji,jj,jk) * tmask(ji,jj,1)
	220	!
	221	zztmp = tsn(ji,jj,nla10,jp_tem) - tsn(ji,jj,jk,jp_tem) ! - delta T(10m)
	222	IF( ABS(zztmp) > ztem2 ) zabs2 (ji,jj) = zzdep ! abs > 0.2
	223	IF( zztmp > ztem2 ) ztm2 (ji,jj) = zzdep ! > 0.2
	224	zztmp = -zztmp ! delta T(10m)
	225	IF( zztmp > ztinv(ji,jj) ) THEN ! temperature inversion
	226	ztinv(ji,jj) = zztmp
	227	zdepinv (ji,jj) = zzdep ! max value and depth
	228	ENDIF
[1577]	229
[12276]	230	zztmp = rhop(ji,jj,jk) - rhop(ji,jj,nla10) ! delta rho(10m)
	231	IF( zztmp > zrho3 ) zrho10_3(ji,jj) = zzdep ! > 0.03
	232	IF( zztmp > zdelr(ji,jj) ) zpycn (ji,jj) = zzdep ! > equi. delta T(10m) - 0.2
	233	!
	234	END DO
	235	END DO
[1577]	236	END DO
[3]	237
[12276]	238	CALL iom_put( 'mld_dt02', zabs2 ) ! MLD abs(delta t) - 0.2
	239	CALL iom_put( 'topthdep', ztm2 ) ! T(10) - 0.2
	240	CALL iom_put( 'mldr10_3', zrho10_3 ) ! MLD delta rho(10m) = 0.03
	241	CALL iom_put( 'pycndep' , zpycn ) ! MLD delta rho equi. delta T(10m) = 0.2
	242	CALL iom_put( 'tinv' , ztinv ) ! max. temp. inv. (t10 ref)
	243	CALL iom_put( 'depti' , zdepinv ) ! depth of max. temp. inv. (t10 ref)
	244	!
	245	ENDIF
	246
	247	! ------------------------------- !
	248	! Depth of 20C/26C/28C isotherm !
	249	! ------------------------------- !
	250	IF( iom_use ('20d') ) THEN ! depth of the 20 isotherm
	251	ztem2 = 20.
	252	CALL dia_hth_dep( ztem2, hd20 )
	253	CALL iom_put( '20d', hd20 )
	254	ENDIF
	255	!
	256	IF( iom_use ('26d') ) THEN ! depth of the 26 isotherm
	257	ztem2 = 26.
	258	CALL dia_hth_dep( ztem2, hd26 )
	259	CALL iom_put( '26d', hd26 )
	260	ENDIF
	261	!
	262	IF( iom_use ('28d') ) THEN ! depth of the 28 isotherm
	263	ztem2 = 28.
	264	CALL dia_hth_dep( ztem2, hd28 )
	265	CALL iom_put( '28d', hd28 )
	266	ENDIF
	267
	268	! ----------------------------- !
	269	! Heat content of first 300 m !
	270	! ----------------------------- !
	271	IF( iom_use ('hc300') ) THEN
	272	zzdep = 300.
	273	CALL dia_hth_htc( zzdep, tsn(:,:,:,jp_tem), htc3 )
	274	CALL iom_put( 'hc300', rau0_rcp * htc3 ) ! vertically integrated heat content (J/m2)
	275	ENDIF
	276	!
	277	! ----------------------------- !
	278	! Heat content of first 700 m !
	279	! ----------------------------- !
	280	IF( iom_use ('hc700') ) THEN
	281	zzdep = 700.
	282	CALL dia_hth_htc( zzdep, tsn(:,:,:,jp_tem), htc7 )
	283	CALL iom_put( 'hc700', rau0_rcp * htc7 ) ! vertically integrated heat content (J/m2)
	284
	285	ENDIF
	286	!
	287	! ----------------------------- !
	288	! Heat content of first 2000 m !
	289	! ----------------------------- !
	290	IF( iom_use ('hc2000') ) THEN
	291	zzdep = 2000.
	292	CALL dia_hth_htc( zzdep, tsn(:,:,:,jp_tem), htc20 )
	293	CALL iom_put( 'hc2000', rau0_rcp * htc20 ) ! vertically integrated heat content (J/m2)
	294	ENDIF
	295	!
	296	ENDIF
[1577]	297
[12276]	298	!
	299	IF( ln_timing ) CALL timing_stop('dia_hth')
	300	!
	301	END SUBROUTINE dia_hth
[1577]	302
[12276]	303	SUBROUTINE dia_hth_dep( ptem, pdept )
	304	!
	305	REAL(wp), INTENT(in) :: ptem
	306	REAL(wp), DIMENSION(jpi,jpj), INTENT(out) :: pdept
	307	!
	308	INTEGER :: ji, jj, jk, iid
	309	REAL(wp) :: zztmp, zzdep
	310	INTEGER, DIMENSION(jpi,jpj) :: iktem
	311
	312	! --------------------------------------- !
	313	! search deepest level above ptem !
	314	! --------------------------------------- !
	315	iktem(:,:) = 1
[1577]	316	DO jk = 1, jpkm1 ! beware temperature is not always decreasing with depth => loop from top to bottom
	317	DO jj = 1, jpj
	318	DO ji = 1, jpi
[3294]	319	zztmp = tsn(ji,jj,jk,jp_tem)
[12276]	320	IF( zztmp >= ptem ) iktem(ji,jj) = jk
[1577]	321	END DO
	322	END DO
	323	END DO
	324
[12276]	325	! ------------------------------- !
	326	! Depth of ptem isotherm !
	327	! ------------------------------- !
[3]	328	DO jj = 1, jpj
	329	DO ji = 1, jpi
[2528]	330	!
[12276]	331	zzdep = gdepw_n(ji,jj,mbkt(ji,jj)+1) ! depth of the ocean bottom
[2528]	332	!
[12276]	333	iid = iktem(ji,jj)
[1577]	334	IF( iid /= 1 ) THEN
[12276]	335	zztmp = gdept_n(ji,jj,iid ) & ! linear interpolation
[6140]	336	& + ( gdept_n(ji,jj,iid+1) - gdept_n(ji,jj,iid) ) &
[3294]	337	& * ( 20.*tmask(ji,jj,iid+1) - tsn(ji,jj,iid,jp_tem) ) &
	338	& / ( tsn(ji,jj,iid+1,jp_tem) - tsn(ji,jj,iid,jp_tem) + (1.-tmask(ji,jj,1)) )
[12276]	339	pdept(ji,jj) = MIN( zztmp , zzdep) * tmask(ji,jj,1) ! bound by the ocean depth
[1577]	340	ELSE
[12276]	341	pdept(ji,jj) = 0._wp
[1577]	342	ENDIF
[3]	343	END DO
	344	END DO
[12276]	345	!
	346	END SUBROUTINE dia_hth_dep
[3]	347
	348
[12276]	349	SUBROUTINE dia_hth_htc( pdep, ptn, phtc )
	350	!
	351	REAL(wp), INTENT(in) :: pdep ! depth over the heat content
	352	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in) :: ptn
	353	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: phtc
	354	!
	355	INTEGER :: ji, jj, jk, ik
	356	REAL(wp), DIMENSION(jpi,jpj) :: zthick
	357	INTEGER , DIMENSION(jpi,jpj) :: ilevel
	358
	359
[1484]	360	! surface boundary condition
[12276]	361
	362	IF( .NOT. ln_linssh ) THEN ; zthick(:,:) = 0._wp ; phtc(:,:) = 0._wp
	363	ELSE ; zthick(:,:) = sshn(:,:) ; phtc(:,:) = ptn(:,:,1) * sshn(:,:) * tmask(:,:,1)
[1484]	364	ENDIF
[12276]	365	!
	366	ilevel(:,:) = 1
	367	DO jk = 2, jpkm1
	368	DO jj = 1, jpj
	369	DO ji = 1, jpi
	370	IF( ( gdept_n(ji,jj,jk) < pdep ) .AND. ( tmask(ji,jj,jk) == 1 ) ) THEN
	371	ilevel(ji,jj) = jk
	372	zthick(ji,jj) = zthick(ji,jj) + e3t_n(ji,jj,jk)
	373	phtc (ji,jj) = phtc (ji,jj) + e3t_n(ji,jj,jk) * ptn(ji,jj,jk)
	374	ENDIF
	375	ENDDO
	376	ENDDO
	377	ENDDO
	378	!
[1551]	379	DO jj = 1, jpj
	380	DO ji = 1, jpi
[12276]	381	ik = ilevel(ji,jj)
	382	zthick(ji,jj) = pdep - zthick(ji,jj) ! remaining thickness to reach depht pdep
	383	phtc(ji,jj) = phtc(ji,jj) + ptn(ji,jj,ik+1) * MIN( e3t_n(ji,jj,ik+1), zthick(ji,jj) ) &
	384	* tmask(ji,jj,ik+1)
[1551]	385	END DO
[12276]	386	ENDDO
[2528]	387	!
[3294]	388	!
[12276]	389	END SUBROUTINE dia_hth_htc
[3]	390
	391	!!======================================================================
	392	END MODULE diahth

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