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p4zrem.F90

Last change on this file was 15459, checked in by cetlod, 2 years ago
Various bug fixes and more comments in PISCES routines ; sette test OK in debug mode, nn_hls=1/2, with tiling ; run.stat unchanged ; of course tracer.stat different
Property svn:keywords set to `Id`
File size: 17.3 KB

Rev	Line
[3443]	1	MODULE p4zrem
	2	!!======================================================================
	3	!! * MODULE p4zrem *
	4	!! TOP : PISCES Compute remineralization/dissolution of organic compounds
[15459]	5	!! except for POC which is treated in p4zpoc.F90
	6	!! This module is common to both PISCES and PISCES-QUOTA
[3443]	7	!!=========================================================================
	8	!! History : 1.0 ! 2004 (O. Aumont) Original code
	9	!! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90
	10	!! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Quota model for iron
	11	!!----------------------------------------------------------------------
	12	!! p4z_rem : Compute remineralization/dissolution of organic compounds
	13	!! p4z_rem_init : Initialisation of parameters for remineralisation
	14	!! p4z_rem_alloc : Allocate remineralisation variables
	15	!!----------------------------------------------------------------------
	16	USE oce_trc ! shared variables between ocean and passive tracers
	17	USE trc ! passive tracers common variables
	18	USE sms_pisces ! PISCES Source Minus Sink variables
	19	USE p4zche ! chemical model
	20	USE p4zprod ! Growth rate of the 2 phyto groups
[15459]	21	USE p4zlim ! Nutrient limitation terms
[13286]	22	USE prtctl ! print control for debugging
[3443]	23	USE iom ! I/O manager
	24
	25
	26	IMPLICIT NONE
	27	PRIVATE
	28
	29	PUBLIC p4z_rem ! called in p4zbio.F90
[15459]	30	PUBLIC p4z_rem_init ! called in trcini_pisces.F90
	31	PUBLIC p4z_rem_alloc ! called in trcini_pisces.F90
[3443]	32
[15459]	33	!! * Shared module variables
	34	REAL(wp), PUBLIC :: xremikc !: remineralisation rate of DOC (p5z)
	35	REAL(wp), PUBLIC :: xremikn !: remineralisation rate of DON (p5z)
	36	REAL(wp), PUBLIC :: xremikp !: remineralisation rate of DOP (p5z)
[9169]	37	REAL(wp), PUBLIC :: nitrif !: NH4 nitrification rate
[15459]	38	REAL(wp), PUBLIC :: xsirem !: remineralisation rate of biogenic silica
	39	REAL(wp), PUBLIC :: xsiremlab !: fast remineralisation rate of BSi
[9169]	40	REAL(wp), PUBLIC :: xsilab !: fraction of labile biogenic silica
	41	REAL(wp), PUBLIC :: feratb !: Fe/C quota in bacteria
[15459]	42	REAL(wp), PUBLIC :: xkferb !: Half-saturation constant for bacterial Fe/C
[3443]	43
[9169]	44	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: denitr !: denitrification array
[3443]	45
[12377]	46	!! * Substitutions
	47	# include "do_loop_substitute.h90"
[13237]	48	# include "domzgr_substitute.h90"
[3443]	49	!!----------------------------------------------------------------------
[10067]	50	!! NEMO/TOP 4.0 , NEMO Consortium (2018)
[10069]	51	!! $Id$
[10068]	52	!! Software governed by the CeCILL license (see ./LICENSE)
[3443]	53	!!----------------------------------------------------------------------
	54	CONTAINS
	55
[12377]	56	SUBROUTINE p4z_rem( kt, knt, Kbb, Kmm, Krhs )
[3443]	57	!!---------------------------------------------------------------------
	58	!! * ROUTINE p4z_rem *
	59	!!
[15459]	60	!! ** Purpose : Compute remineralization/dissolution of organic compounds
	61	!! Computes also nitrification of ammonium
	62	!! The solubilization/remineralization of POC is treated
	63	!! in p4zpoc.F90. The dissolution of calcite is processed
	64	!! in p4zlys.F90.
[3443]	65	!!
[15459]	66	!! ** Method : - Bacterial biomass is computed implicitely based on a
	67	!! parameterization developed from an explicit modeling
	68	!! of PISCES in an alternative version
[3443]	69	!!---------------------------------------------------------------------
[12377]	70	INTEGER, INTENT(in) :: kt, knt ! ocean time step
	71	INTEGER, INTENT(in) :: Kbb, Kmm, Krhs ! time level indices
[3443]	72	!
	73	INTEGER :: ji, jj, jk
[7646]	74	REAL(wp) :: zremik, zremikc, zremikn, zremikp, zsiremin, zfact
[3446]	75	REAL(wp) :: zsatur, zsatur2, znusil, znusil2, zdep, zdepmin, zfactdep
[15459]	76	REAL(wp) :: zbactfer, zonitr, zrfact2
	77	REAL(wp) :: zammonic, zoxyremc, zosil, ztem, zdenitnh4, zolimic
[3443]	78	CHARACTER (len=25) :: charout
[15459]	79	REAL(wp), DIMENSION(jpi,jpj,jpk) :: zdepbac, zolimi, zfacsi, zfacsib, zdepeff, zfebact
[9125]	80	REAL(wp), DIMENSION(jpi,jpj ) :: ztempbac
[3443]	81	!!---------------------------------------------------------------------
	82	!
[9124]	83	IF( ln_timing ) CALL timing_start('p4z_rem')
[3443]	84	!
[15459]	85	! Initialisation of arrays
[10362]	86	zdepeff (:,:,:) = 0.3_wp
[7753]	87	zfacsib(:,:,:) = xsilab / ( 1.0 - xsilab )
[10362]	88	zfebact(:,:,:) = 0._wp
[7753]	89	zfacsi(:,:,:) = xsilab
[3443]	90
[15459]	91	! Computation of the mean bacterial concentration
[3443]	92	! this parameterization has been deduced from a model version
[15459]	93	! that was modeling explicitely bacteria. This is a very old param
	94	! that will be very soon updated based on results from a much more
	95	! recent version of PISCES with bacteria.
	96	! ----------------------------------------------------------------
[15090]	97	DO_3D( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpkm1)
[15459]	98	zdep = MAX( hmld(ji,jj), heup_01(ji,jj) )
	99	IF ( gdept(ji,jj,jk,Kmm) < zdep ) THEN
	100	zdepbac(ji,jj,jk) = 0.6 * ( MAX(0.0, tr(ji,jj,jk,jpzoo,Kbb) + tr(ji,jj,jk,jpmes,Kbb) ) * 1.0E6 )*0.6 1.E-6
[12377]	101	ztempbac(ji,jj) = zdepbac(ji,jj,jk)
[15459]	102	! IF( gdept(ji,jj,jk,Kmm) >= zdep ) THEN
[12377]	103	ELSE
	104	zdepmin = MIN( 1., zdep / gdept(ji,jj,jk,Kmm) )
	105	zdepbac (ji,jj,jk) = zdepmin*0.683 ztempbac(ji,jj)
[15459]	106	! zdepeff(ji,jj,jk) = zdepeff(ji,jj,jk) * zdepmin**0.3
	107	zdepeff(ji,jj,jk) = zdepeff(ji,jj,jk) * zdepmin**0.6
[12377]	108	ENDIF
	109	END_3D
[3443]	110
[15459]	111	DO_3D( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpkm1)
	112	! DOC ammonification. Depends on depth, phytoplankton biomass
	113	! and a limitation term which is supposed to be a parameterization of the bacterial activity.
	114	! --------------------------------------------------------------------------
	115	zremik = xstep / 1.e-6 * xlimbac(ji,jj,jk) * zdepbac(ji,jj,jk)
	116	zremik = MAX( zremik, 2.74e-4 * xstep / xremikc )
	117	zremikc = xremikc * zremik
	118	! Ammonification in oxic waters with oxygen consumption
	119	! -----------------------------------------------------
	120	zolimic = zremikc * ( 1.- nitrfac(ji,jj,jk) ) * tr(ji,jj,jk,jpdoc,Kbb)
	121	zolimic = MAX(0., MIN( ( tr(ji,jj,jk,jpoxy,Kbb) - rtrn ) / o2ut, zolimic ) )
	122	zolimi(ji,jj,jk) = zolimic
[8533]	123
[15459]	124	! Ammonification in suboxic waters with denitrification
	125	! -----------------------------------------------------
	126	zammonic = zremikc * nitrfac(ji,jj,jk) * tr(ji,jj,jk,jpdoc,Kbb)
	127	denitr(ji,jj,jk) = zammonic * ( 1. - nitrfac2(ji,jj,jk) )
	128	denitr(ji,jj,jk) = MAX(0., MIN( ( tr(ji,jj,jk,jpno3,Kbb) - rtrn ) / rdenit, denitr(ji,jj,jk) ) )
[3443]	129
[15459]	130	! Ammonification in waters depleted in O2 and NO3 based on
	131	! other redox processes
	132	! --------------------------------------------------------
	133	zoxyremc = MAX(0., zammonic - denitr(ji,jj,jk) )
[3443]	134
[15459]	135	! Update of the the trends arrays
	136	tr(ji,jj,jk,jpno3,Krhs) = tr(ji,jj,jk,jpno3,Krhs) - denitr (ji,jj,jk) * rdenit
	137	tr(ji,jj,jk,jpdoc,Krhs) = tr(ji,jj,jk,jpdoc,Krhs) - ( zolimic + denitr(ji,jj,jk) + zoxyremc )
	138	tr(ji,jj,jk,jpoxy,Krhs) = tr(ji,jj,jk,jpoxy,Krhs) - zolimic * o2ut
	139	tr(ji,jj,jk,jpdic,Krhs) = tr(ji,jj,jk,jpdic,Krhs) + zolimic + denitr(ji,jj,jk) + zoxyremc
	140	IF( ln_p4z ) THEN ! PISCES-std
	141	tr(ji,jj,jk,jppo4,Krhs) = tr(ji,jj,jk,jppo4,Krhs) + zolimic + denitr(ji,jj,jk) + zoxyremc
	142	tr(ji,jj,jk,jpnh4,Krhs) = tr(ji,jj,jk,jpnh4,Krhs) + zolimic + denitr(ji,jj,jk) + zoxyremc
	143	tr(ji,jj,jk,jptal,Krhs) = tr(ji,jj,jk,jptal,Krhs) + rno3 * ( zolimic + zoxyremc + ( rdenit + 1.) * denitr(ji,jj,jk) )
	144	ELSE ! PISCES-QUOTA (p5z)
	145	zremikn = xremikn / xremikc * tr(ji,jj,jk,jpdon,kbb) / ( tr(ji,jj,jk,jpdoc,Kbb) + rtrn )
	146	zremikp = xremikp / xremikc * tr(ji,jj,jk,jpdop,Kbb) / ( tr(ji,jj,jk,jpdoc,Kbb) + rtrn )
	147	tr(ji,jj,jk,jppo4,Krhs) = tr(ji,jj,jk,jppo4,Krhs) + zremikp * ( zolimic + denitr(ji,jj,jk) + zoxyremc )
	148	tr(ji,jj,jk,jpnh4,Krhs) = tr(ji,jj,jk,jpnh4,Krhs) + zremikn * ( zolimic + denitr(ji,jj,jk) + zoxyremc )
	149	tr(ji,jj,jk,jpdon,Krhs) = tr(ji,jj,jk,jpdon,Krhs) - zremikn * ( zolimic + denitr(ji,jj,jk) + zoxyremc )
	150	tr(ji,jj,jk,jpdop,Krhs) = tr(ji,jj,jk,jpdop,Krhs) - zremikp * ( zolimic + denitr(ji,jj,jk) + zoxyremc )
	151	tr(ji,jj,jk,jptal,Krhs) = tr(ji,jj,jk,jptal,Krhs) + rno3 * zremikn * ( zolimic + zoxyremc + ( rdenit + 1.) * denitr(ji,jj,jk) )
	152	ENDIF
	153	END_3D
[7646]	154
[15090]	155	DO_3D( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpkm1)
[12377]	156	! NH4 nitrification to NO3. Ceased for oxygen concentrations
	157	! below 2 umol/L. Inhibited at strong light
	158	! ----------------------------------------------------------
	159	zonitr = nitrif * xstep * tr(ji,jj,jk,jpnh4,Kbb) * ( 1.- nitrfac(ji,jj,jk) ) &
	160	& / ( 1.+ emoy(ji,jj,jk) ) * ( 1. + fr_i(ji,jj) * emoy(ji,jj,jk) )
	161	zdenitnh4 = nitrif * xstep * tr(ji,jj,jk,jpnh4,Kbb) * nitrfac(ji,jj,jk)
[15459]	162	zdenitnh4 = MAX(0., MIN( ( tr(ji,jj,jk,jpno3,Kbb) - rtrn ) / rdenita, zdenitnh4 ) )
[12377]	163	! Update of the tracers trends
	164	! ----------------------------
	165	tr(ji,jj,jk,jpnh4,Krhs) = tr(ji,jj,jk,jpnh4,Krhs) - zonitr - zdenitnh4
	166	tr(ji,jj,jk,jpno3,Krhs) = tr(ji,jj,jk,jpno3,Krhs) + zonitr - rdenita * zdenitnh4
	167	tr(ji,jj,jk,jpoxy,Krhs) = tr(ji,jj,jk,jpoxy,Krhs) - o2nit * zonitr
	168	tr(ji,jj,jk,jptal,Krhs) = tr(ji,jj,jk,jptal,Krhs) - 2 * rno3 * zonitr + rno3 * ( rdenita - 1. ) * zdenitnh4
	169	END_3D
[3443]	170
[15459]	171	IF(sn_cfctl%l_prttrc) THEN ! print mean trends (used for debugging)
[7753]	172	WRITE(charout, FMT="('rem1')")
[13286]	173	CALL prt_ctl_info( charout, cdcomp = 'top' )
	174	CALL prt_ctl(tab4d_1=tr(:,:,:,:,Krhs), mask1=tmask, clinfo=ctrcnm)
[15459]	175	ENDIF
[3443]	176
[15090]	177	DO_3D( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpkm1)
[3443]	178
[12377]	179	! Bacterial uptake of iron. No iron is available in DOC. So
	180	! Bacteries are obliged to take up iron from the water. Some
	181	! studies (especially at Papa) have shown this uptake to be significant
	182	! ----------------------------------------------------------
[15459]	183	zbactfer = feratb * 0.6_wp * xstep * tgfunc(ji,jj,jk) * xlimbacl(ji,jj,jk) * tr(ji,jj,jk,jpfer,Kbb) &
	184	& / ( xkferb + tr(ji,jj,jk,jpfer,Kbb) ) * zdepeff(ji,jj,jk) * zdepbac(ji,jj,jk)
	185
	186	! Only the transfer of iron from its dissolved form to particles
	187	! is treated here. The GGE of bacteria supposed to be equal to
	188	! 0.33. This is hard-coded.
	189	tr(ji,jj,jk,jpfer,Krhs) = tr(ji,jj,jk,jpfer,Krhs) - zbactfer*0.1
	190	tr(ji,jj,jk,jpsfe,Krhs) = tr(ji,jj,jk,jpsfe,Krhs) + zbactfer*0.08
	191	tr(ji,jj,jk,jpbfe,Krhs) = tr(ji,jj,jk,jpbfe,Krhs) + zbactfer*0.02
	192	zfebact(ji,jj,jk) = zbactfer * 0.1
	193	blim(ji,jj,jk) = xlimbacl(ji,jj,jk) * zdepbac(ji,jj,jk) / 1.e-6
[12377]	194	END_3D
[3443]	195
[12377]	196	IF(sn_cfctl%l_prttrc) THEN ! print mean trends (used for debugging)
[7753]	197	WRITE(charout, FMT="('rem2')")
[13286]	198	CALL prt_ctl_info( charout, cdcomp = 'top' )
	199	CALL prt_ctl(tab4d_1=tr(:,:,:,:,Krhs), mask1=tmask, clinfo=ctrcnm)
[7753]	200	ENDIF
[3443]	201
[7646]	202	! Initialization of the array which contains the labile fraction
	203	! of bSi. Set to a constant in the upper ocean
	204	! ---------------------------------------------------------------
[15090]	205	DO_3D( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpkm1)
[15459]	206	! Remineralization rate of BSi dependent on T and saturation
	207	! The parameterization is taken from Ridgwell et al. (2002)
	208	! ---------------------------------------------------------
[12377]	209	zdep = MAX( hmld(ji,jj), heup_01(ji,jj) )
	210	zsatur = MAX( rtrn, ( sio3eq(ji,jj,jk) - tr(ji,jj,jk,jpsil,Kbb) ) / ( sio3eq(ji,jj,jk) + rtrn ) )
	211	zsatur2 = ( 1. + ts(ji,jj,jk,jp_tem,Kmm) / 400.)**37
	212	znusil = 0.225 * ( 1. + ts(ji,jj,jk,jp_tem,Kmm) / 15.) * zsatur + 0.775 * zsatur2 * zsatur**9.25
[15459]	213
	214	! Two fractions of bSi are considered : a labile one and a more
	215	! refractory one based on the commonly observed two step
	216	! dissolution of bSi (initial rapid dissolution followed by
	217	! more slowly dissolution).
	218	! Computation of the vertical evolution of the labile fraction
	219	! of bSi. This is computed assuming steady state.
	220	! --------------------------------------------------------------
[12377]	221	IF ( gdept(ji,jj,jk,Kmm) > zdep ) THEN
	222	zfacsib(ji,jj,jk) = zfacsib(ji,jj,jk-1) * EXP( -0.5 * ( xsiremlab - xsirem ) &
	223	& * znusil * e3t(ji,jj,jk,Kmm) / wsbio4(ji,jj,jk) )
	224	zfacsi(ji,jj,jk) = zfacsib(ji,jj,jk) / ( 1.0 + zfacsib(ji,jj,jk) )
	225	zfacsib(ji,jj,jk) = zfacsib(ji,jj,jk) * EXP( -0.5 * ( xsiremlab - xsirem ) &
	226	& * znusil * e3t(ji,jj,jk,Kmm) / wsbio4(ji,jj,jk) )
	227	ENDIF
	228	zsiremin = ( xsiremlab * zfacsi(ji,jj,jk) + xsirem * ( 1. - zfacsi(ji,jj,jk) ) ) * xstep * znusil
	229	zosil = zsiremin * tr(ji,jj,jk,jpgsi,Kbb)
	230	!
	231	tr(ji,jj,jk,jpgsi,Krhs) = tr(ji,jj,jk,jpgsi,Krhs) - zosil
	232	tr(ji,jj,jk,jpsil,Krhs) = tr(ji,jj,jk,jpsil,Krhs) + zosil
	233	END_3D
[3443]	234
[12377]	235	IF(sn_cfctl%l_prttrc) THEN ! print mean trends (used for debugging)
[7646]	236	WRITE(charout, FMT="('rem3')")
[13286]	237	CALL prt_ctl_info( charout, cdcomp = 'top' )
	238	CALL prt_ctl(tab4d_1=tr(:,:,:,:,Krhs), mask1=tmask, clinfo=ctrcnm)
[7753]	239	ENDIF
[3443]	240
[12377]	241	IF( knt == nrdttrc ) THEN
[12276]	242	zrfact2 = 1.e+3 * rfact2r ! conversion from mol/l/kt to mol/m3/s
[7753]	243	!
[12276]	244	IF( iom_use( "REMIN" ) ) THEN ! Remineralisation rate
	245	zolimi(:,:,jpk) = 0. ; CALL iom_put( "REMIN" , zolimi(:,:,:) * tmask(:,:,:) * zrfact2 )
[7753]	246	ENDIF
[12276]	247	CALL iom_put( "DENIT" , denitr(:,:,:) * rdenit * rno3 * tmask(:,:,:) * zrfact2 ) ! Denitrification
	248	IF( iom_use( "BACT" ) ) THEN ! Bacterial biomass
	249	zdepbac(:,:,jpk) = 0. ; CALL iom_put( "BACT", zdepbac(:,:,:) * 1.E6 * tmask(:,:,:) )
[7753]	250	ENDIF
[12276]	251	CALL iom_put( "FEBACT" , zfebact(:,:,:) * 1E9 * tmask(:,:,:) * zrfact2 )
[7753]	252	ENDIF
[3443]	253	!
[9124]	254	IF( ln_timing ) CALL timing_stop('p4z_rem')
[3443]	255	!
	256	END SUBROUTINE p4z_rem
	257
	258
	259	SUBROUTINE p4z_rem_init
	260	!!----------------------------------------------------------------------
	261	!! * ROUTINE p4z_rem_init *
	262	!!
	263	!! ** Purpose : Initialization of remineralization parameters
	264	!!
	265	!! ** Method : Read the nampisrem namelist and check the parameters
	266	!! called at the first timestep
	267	!!
	268	!! ** input : Namelist nampisrem
	269	!!
	270	!!----------------------------------------------------------------------
[15459]	271	NAMELIST/nampisrem/ nitrif, xsirem, xsiremlab, xsilab, feratb, xkferb, &
[7646]	272	& xremikc, xremikn, xremikp
[4147]	273	INTEGER :: ios ! Local integer output status for namelist read
[9124]	274	!!----------------------------------------------------------------------
[9169]	275	!
	276	IF(lwp) THEN
	277	WRITE(numout,*)
	278	WRITE(numout,*) 'p4z_rem_init : Initialization of remineralization parameters'
	279	WRITE(numout,*) '~~~~~~~~~~~~'
	280	ENDIF
	281	!
[4147]	282	READ ( numnatp_ref, nampisrem, IOSTAT = ios, ERR = 901)
[11536]	283	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampisrem in reference namelist' )
[4147]	284	READ ( numnatp_cfg, nampisrem, IOSTAT = ios, ERR = 902 )
[11536]	285	902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nampisrem in configuration namelist' )
[9169]	286	IF(lwm) WRITE( numonp, nampisrem )
[4147]	287
[3443]	288	IF(lwp) THEN ! control print
[9169]	289	WRITE(numout,*) ' Namelist parameters for remineralization, nampisrem'
[7646]	290	IF( ln_p4z ) THEN
[15459]	291	WRITE(numout,*) ' remineralization rate of DOC xremikc =', xremikc
[7646]	292	ELSE
[9169]	293	WRITE(numout,*) ' remineralization rate of DOC xremikc =', xremikc
	294	WRITE(numout,*) ' remineralization rate of DON xremikn =', xremikn
	295	WRITE(numout,*) ' remineralization rate of DOP xremikp =', xremikp
[7646]	296	ENDIF
[9169]	297	WRITE(numout,*) ' remineralization rate of Si xsirem =', xsirem
	298	WRITE(numout,*) ' fast remineralization rate of Si xsiremlab =', xsiremlab
	299	WRITE(numout,*) ' fraction of labile biogenic silica xsilab =', xsilab
	300	WRITE(numout,*) ' NH4 nitrification rate nitrif =', nitrif
	301	WRITE(numout,*) ' Bacterial Fe/C ratio feratb =', feratb
	302	WRITE(numout,*) ' Half-saturation constant for bact. Fe/C xkferb =', xkferb
[3443]	303	ENDIF
	304	!
[9169]	305	denitr(:,:,:) = 0._wp
[3443]	306	!
	307	END SUBROUTINE p4z_rem_init
	308
	309
	310	INTEGER FUNCTION p4z_rem_alloc()
	311	!!----------------------------------------------------------------------
	312	!! * ROUTINE p4z_rem_alloc *
	313	!!----------------------------------------------------------------------
[7646]	314	ALLOCATE( denitr(jpi,jpj,jpk), STAT=p4z_rem_alloc )
[3443]	315	!
[10425]	316	IF( p4z_rem_alloc /= 0 ) CALL ctl_stop( 'STOP', 'p4z_rem_alloc: failed to allocate arrays' )
[3443]	317	!
	318	END FUNCTION p4z_rem_alloc
	319
	320	!!======================================================================
	321	END MODULE p4zrem

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