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asmphytobal_medusa.F90 in branches/UKMO/dev_r5518_GO6_package_FOAMv14/NEMOGCM/NEMO/OPA_SRC/ASM – NEMO

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source: branches/UKMO/dev_r5518_GO6_package_FOAMv14/NEMOGCM/NEMO/OPA_SRC/ASM/asmphytobal_medusa.F90 @ 13316

Last change on this file since 13316 was 13316, checked in by dford, 4 years ago
Allow nitrogen balancing when assimilating 3D chlorophyll data. See Met Office utils ticket 346.
File size: 33.2 KB

Rev	Line
[13097]	1	MODULE asmphytobal_medusa
[8428]	2	!!======================================================================
[9432]	3	!! * MODULE asmphyto2dbal_medusa *
	4	!! Calculate increments to MEDUSA based on surface phyto2d increments
[8428]	5	!!
	6	!! IMPORTANT NOTE: This calls the bioanalysis routine of Hemmings et al.
	7	!! For licensing reasons this is kept in its own internal Met Office
	8	!! branch (dev/frdf/vn3.6_nitrogen_balancing) rather than in the Paris
	9	!! repository, and must be merged in when building.
	10	!!
	11	!!======================================================================
[9432]	12	!! History : 3.6 ! 2017-08 (D. Ford) Adapted from asmphyto2dbal_hadocc
[8428]	13	!!----------------------------------------------------------------------
[10141]	14	#if defined key_asminc && defined key_medusa
[8428]	15	!!----------------------------------------------------------------------
	16	!! 'key_asminc' : assimilation increment interface
[8436]	17	!! 'key_medusa' : MEDUSA model
[8428]	18	!!----------------------------------------------------------------------
[9432]	19	!! asm_phyto2d_bal_medusa : routine to calculate increments to MEDUSA
[8428]	20	!!----------------------------------------------------------------------
	21	USE par_kind, ONLY: wp ! kind parameters
	22	USE par_oce, ONLY: jpi, jpj, jpk ! domain array sizes
	23	USE dom_oce, ONLY: gdepw_n ! domain information
[8485]	24	USE zdftmx, ONLY: ln_tmx_itf, & ! Indonesian Throughflow
	25	& mask_itf ! tidal mixing mask
[8428]	26	USE iom ! i/o
[8436]	27	USE sms_medusa ! MEDUSA parameters
	28	USE par_medusa ! MEDUSA parameters
[8428]	29	USE par_trc, ONLY: jptra ! Tracer parameters
	30	USE bioanalysis ! Nitrogen balancing
	31
	32	IMPLICIT NONE
	33	PRIVATE
	34
[13097]	35	PUBLIC asm_phyto_bal_medusa
[8428]	36
	37	! Default values for biological assimilation parameters
	38	! Should match Hemmings et al. (2008)
	39	REAL(wp), PARAMETER :: balnutext = 0.6 !: Default nutrient balancing factor
	40	REAL(wp), PARAMETER :: balnutmin = 0.1 !: Fraction of phytoplankton loss to nutrient
	41	REAL(wp), PARAMETER :: r = 1 !: Reliability of model specific growth rate
	42	REAL(wp), PARAMETER :: beta_g = 0.05 !: Low rate bias correction for growth rate estimator
	43	REAL(wp), PARAMETER :: beta_l = 0.05 !: Low rate bias correction for primary loss rate estimator
	44	REAL(wp), PARAMETER :: beta_m = 0.05 !: Low rate bias correction for secondary loss rate estimator
	45	REAL(wp), PARAMETER :: a_g = 0.2 !: Error s.d. for log10 of growth rate estimator
	46	REAL(wp), PARAMETER :: a_l = 0.4 !: Error s.d. for log10 of primary loss rate estimator
	47	REAL(wp), PARAMETER :: a_m = 0.7 !: Error s.d. for log10 of secondary loss rate estimator
	48	REAL(wp), PARAMETER :: zfracb0 = 0.7 !: Base zooplankton fraction of loss to Z & D
	49	REAL(wp), PARAMETER :: zfracb1 = 0 !: Phytoplankton sensitivity of zooplankton fraction
	50	REAL(wp), PARAMETER :: qrfmax = 1.1 !: Maximum nutrient limitation reduction factor
	51	REAL(wp), PARAMETER :: qafmax = 1.1 !: Maximum nutrient limitation amplification factor
	52	REAL(wp), PARAMETER :: zrfmax = 2 !: Maximum zooplankton reduction factor
	53	REAL(wp), PARAMETER :: zafmax = 2 !: Maximum zooplankton amplification factor
	54	REAL(wp), PARAMETER :: prfmax = 10 !: Maximum phytoplankton reduction factor (secondary)
	55	REAL(wp), PARAMETER :: incphymin = 0.0001 !: Minimum size of non-zero phytoplankton increment
	56	REAL(wp), PARAMETER :: integnstep = 20 !: Number of steps for p.d.f. integral evaluation
	57	REAL(wp), PARAMETER :: pthreshold = 0.01 !: Fractional threshold level for setting p.d.f.
	58	!
	59	LOGICAL, PARAMETER :: diag_active = .TRUE. !: Depth-independent diagnostics
	60	LOGICAL, PARAMETER :: diag_fulldepth_active = .TRUE. !: Full-depth diagnostics
	61	LOGICAL, PARAMETER :: gl_active = .TRUE. !: Growth/loss-based balancing
	62	LOGICAL, PARAMETER :: nbal_active = .TRUE. !: Nitrogen balancing
	63	LOGICAL, PARAMETER :: subsurf_active = .TRUE. !: Increments below MLD
	64	LOGICAL, PARAMETER :: deepneg_active = .FALSE. !: Negative primary increments below MLD
	65	LOGICAL, PARAMETER :: deeppos_active = .FALSE. !: Positive primary increments below MLD
	66	LOGICAL, PARAMETER :: nutprof_active = .TRUE. !: Secondary increments
	67
	68	CONTAINS
	69
[13097]	70	SUBROUTINE asm_phyto_bal_medusa( kdeps, &
	71	& ld_chltot, &
	72	& pinc_chltot_3d, &
	73	& ld_chldia, &
	74	& pinc_chldia_3d, &
	75	& ld_chlnon, &
	76	& pinc_chlnon_3d, &
	77	& ld_phytot, &
	78	& pinc_phytot_3d, &
	79	& ld_phydia, &
	80	& pinc_phydia_3d, &
	81	& ld_phynon, &
	82	& pinc_phynon_3d, &
	83	& pincper, &
	84	& p_maxchlinc, ld_phytobal, pmld, &
	85	& pgrow_avg_bkg_3d, ploss_avg_bkg_3d, &
	86	& phyt_avg_bkg_3d, mld_max_bkg, &
	87	& tracer_bkg, phyto_balinc )
[8428]	88	!!---------------------------------------------------------------------------
[13097]	89	!! * ROUTINE asm_phyto_bal_medusa *
[8428]	90	!!
[13097]	91	!! ** Purpose : calculate increments to MEDUSA from phytoplankton increments
[8428]	92	!!
[9431]	93	!! ** Method : average up MEDUSA to look like HadOCC
[8428]	94	!! call nitrogen balancing scheme
[8436]	95	!! separate back out to MEDUSA
[8428]	96	!!
[13097]	97	!! ** Action : populate phyto_balinc
[8428]	98	!!
	99	!! References : Hemmings et al., 2008, J. Mar. Res.
	100	!! Ford et al., 2012, Ocean Sci.
	101	!!---------------------------------------------------------------------------
	102	!!
[13097]	103	INTEGER, INTENT(in ) :: kdeps ! No. inc deps 1 or jpk
	104	LOGICAL, INTENT(in ) :: ld_chltot ! Assim chltot y/n
	105	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,kdeps) :: pinc_chltot_3d ! chltot increments (3D)
	106	LOGICAL, INTENT(in ) :: ld_chldia ! Assim chldia y/n
	107	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,kdeps) :: pinc_chldia_3d ! chldia increments (3D)
	108	LOGICAL, INTENT(in ) :: ld_chlnon ! Assim chlnon y/n
	109	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,kdeps) :: pinc_chlnon_3d ! chlnon increments (3D)
	110	LOGICAL, INTENT(in ) :: ld_phytot ! Assim phytot y/n
	111	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,kdeps) :: pinc_phytot_3d ! phytot increments (3D)
	112	LOGICAL, INTENT(in ) :: ld_phydia ! Assim phydia y/n
	113	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,kdeps) :: pinc_phydia_3d ! phydia increments (3D)
	114	LOGICAL, INTENT(in ) :: ld_phynon ! Assim phynon y/n
	115	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,kdeps) :: pinc_phynon_3d ! phynon increments (3D)
	116	REAL(wp), INTENT(in ) :: pincper ! Assimilation period
	117	REAL(wp), INTENT(in ) :: p_maxchlinc ! Max chl increment
	118	LOGICAL, INTENT(in ) :: ld_phytobal ! Balancing y/n
	119	REAL(wp), INTENT(inout), DIMENSION(jpi,jpj) :: pmld ! Mixed layer depth
	120	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,kdeps) :: pgrow_avg_bkg_3d ! Avg phyto growth (3D)
	121	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,kdeps) :: ploss_avg_bkg_3d ! Avg phyto loss (3D)
	122	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,kdeps) :: phyt_avg_bkg_3d ! Avg phyto (3D)
	123	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: mld_max_bkg ! Max MLD
	124	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,jpk,jptra) :: tracer_bkg ! State variables
	125	REAL(wp), INTENT( out), DIMENSION(jpi,jpj,jpk,jptra) :: phyto_balinc ! Balancing increments
[8428]	126	!!
[8436]	127	INTEGER :: ji, jj, jk, jn ! Loop counters
[8428]	128	INTEGER :: jkmax ! Loop index
[13097]	129	INTEGER :: jkinc ! Loop index
[8428]	130	INTEGER, DIMENSION(6) :: i_tracer ! Tracer indices
[8436]	131	REAL(wp) :: n2be_p ! N:biomass for total phy
	132	REAL(wp) :: n2be_z ! N:biomass for total zoo
	133	REAL(wp) :: n2be_d ! N:biomass for detritus
[9435]	134	REAL(wp) :: zfrac ! Fraction
[8436]	135	REAL(wp) :: zfrac_chn ! Fraction of jpchn
	136	REAL(wp) :: zfrac_chd ! Fraction of jpchd
	137	REAL(wp) :: zfrac_phn ! Fraction of jpphn
	138	REAL(wp) :: zfrac_phd ! Fraction of jpphd
	139	REAL(wp) :: zfrac_zmi ! Fraction of jpzmi
	140	REAL(wp) :: zfrac_zme ! Fraction of jpzme
	141	REAL(wp) :: zrat_pds_phd ! Ratio of jppds:jpphd
	142	REAL(wp) :: zrat_chd_phd ! Ratio of jpchd:jpphd
	143	REAL(wp) :: zrat_chn_phn ! Ratio of jpchn:jpphn
[9435]	144	REAL(wp) :: zrat_phn_chn ! Ratio of jpphn:jpchn
	145	REAL(wp) :: zrat_phd_chd ! Ratio of jpphd:jpchd
	146	REAL(wp) :: zrat_pds_chd ! Ratio of jppds:jpchd
[8436]	147	REAL(wp) :: zrat_dtc_det ! Ratio of jpdtc:jpdet
[13097]	148	REAL(wp), DIMENSION(jpi,jpj) :: cchl_p_2d ! C:Chl for total phy (2D)
	149	REAL(wp), DIMENSION(jpi,jpj,jpk) :: cchl_p_3d ! C:Chl for total phy (3D)
[8428]	150	REAL(wp), DIMENSION(16) :: modparm ! Model parameters
	151	REAL(wp), DIMENSION(20) :: assimparm ! Assimilation parameters
[13097]	152	REAL(wp), DIMENSION(jpi,jpj,1,6) :: bstate_2d ! Background state (2D)
	153	REAL(wp), DIMENSION(jpi,jpj,jpk,6) :: bstate_3d ! Background state (3D)
	154	REAL(wp), DIMENSION(jpi,jpj,1,6) :: outincs_2d ! Balancing increments (2D)
	155	REAL(wp), DIMENSION(jpi,jpj,jpk,6) :: outincs_3d ! Balancing increments (3D)
	156	REAL(wp), DIMENSION(jpi,jpj,22) :: diag ! Depth-indep diagnostics
	157	REAL(wp), DIMENSION(jpi,jpj,1,22) :: diag_fulldepth_2d ! Full-depth diagnostics (2D)
	158	REAL(wp), DIMENSION(jpi,jpj,jpk,22) :: diag_fulldepth_3d ! Full-depth diagnostics (3D)
	159	REAL(wp), DIMENSION(jpi,jpj,1) :: tmask_2d ! Single-level tmask
	160	REAL(wp), DIMENSION(jpi,jpj) :: pinc_chltot_2d ! chltot increments (2D)
	161	REAL(wp), DIMENSION(jpi,jpj) :: pinc_chldia_2d ! chldia increments (2D)
	162	REAL(wp), DIMENSION(jpi,jpj) :: pinc_chlnon_2d ! chlnon increments (2D)
	163	REAL(wp), DIMENSION(jpi,jpj) :: pinc_phytot_2d ! phytot increments (2D)
	164	REAL(wp), DIMENSION(jpi,jpj) :: pinc_phydia_2d ! phydia increments (2D)
	165	REAL(wp), DIMENSION(jpi,jpj) :: pinc_phynon_2d ! phynon increments (2D)
	166	REAL(wp), DIMENSION(jpi,jpj) :: pgrow_avg_bkg_2d ! Avg phyto growth (2D)
	167	REAL(wp), DIMENSION(jpi,jpj) :: ploss_avg_bkg_2d ! Avg phyto loss (2D)
	168	REAL(wp), DIMENSION(jpi,jpj) :: phyt_avg_bkg_2d ! Avg phyto (2D)
[8428]	169	!!---------------------------------------------------------------------------
	170
[9435]	171	! If p_maxchlinc > 0 then cap total absolute chlorophyll increment at that value
	172	IF ( p_maxchlinc > 0.0 ) THEN
[13097]	173	DO jk = 1, kdeps
[9435]	174	DO jj = 1, jpj
	175	DO ji = 1, jpi
[13097]	176	IF ( ld_chltot ) THEN
	177	pinc_chltot_3d(ji,jj,jk) = MAX( -1.0 * p_maxchlinc, MIN( pinc_chltot_3d(ji,jj,jk), p_maxchlinc ) )
	178	ELSE IF ( ld_chldia .AND. ld_chlnon ) THEN
	179	pinc_chltot_3d(ji,jj,jk) = pinc_chldia_3d(ji,jj,jk) + pinc_chlnon_3d(ji,jj,jk)
	180	pinc_chltot_3d(ji,jj,jk) = MAX( -1.0 * p_maxchlinc, MIN( pinc_chltot_3d(ji,jj,jk), p_maxchlinc ) )
	181	IF ( pinc_chltot_3d(ji,jj,jk) .NE. ( pinc_chldia_3d(ji,jj,jk) + pinc_chlnon_3d(ji,jj,jk) ) ) THEN
	182	zfrac = pinc_chltot_3d(ji,jj,jk) / ( pinc_chldia_3d(ji,jj,jk) + pinc_chlnon_3d(ji,jj,jk) )
	183	pinc_chldia_3d(ji,jj,jk) = pinc_chldia_3d(ji,jj,jk) * zfrac
	184	pinc_chlnon_3d(ji,jj,jk) = pinc_chlnon_3d(ji,jj,jk) * zfrac
	185	ENDIF
	186	ELSE IF ( ld_chldia ) THEN
	187	pinc_chldia_3d(ji,jj,jk) = MAX( -1.0 * p_maxchlinc, MIN( pinc_chldia_3d(ji,jj,jk), p_maxchlinc ) )
	188	pinc_chltot_3d(ji,jj,jk) = pinc_chldia_3d(ji,jj,jk)
	189	ELSE IF ( ld_chlnon ) THEN
	190	pinc_chlnon_3d(ji,jj,jk) = MAX( -1.0 * p_maxchlinc, MIN( pinc_chlnon_3d(ji,jj,jk), p_maxchlinc ) )
	191	pinc_chltot_3d(ji,jj,jk) = pinc_chlnon_3d(ji,jj,jk)
[9435]	192	ENDIF
	193	END DO
	194	END DO
[13097]	195	END DO
[8648]	196	ENDIF
[9435]	197
	198	IF ( ld_phytot .OR. ld_phydia .OR. ld_phynon ) THEN
	199	CALL ctl_stop( ' No phytoplankton carbon assimilation quite yet' )
	200	ENDIF
[8428]	201
[9431]	202	IF ( ld_phytobal ) THEN ! Nitrogen balancing
[8428]	203
[8436]	204	! Set up model parameters to be passed into Hemmings balancing routine.
	205	! For now these are hardwired to the standard HadOCC parameter values
	206	! (except C:N ratios) as this is what the scheme was developed for.
	207	! Obviously, HadOCC and MEDUSA are rather different models, so this
	208	! isn't ideal, but there's not always direct analogues between the two
	209	! parameter sets, so it's the easiest way to get something running.
	210	! In the longer term, some serious MarMOT-based development is required.
	211	modparm(1) = 0.1 ! grow_sat
	212	modparm(2) = 2.0 ! psmax
	213	modparm(3) = 0.845 ! par
	214	modparm(4) = 0.02 ! alpha
	215	modparm(5) = 0.05 ! resp_rate
	216	modparm(6) = 0.05 ! pmort_rate
	217	modparm(7) = 0.01 ! phyto_min
	218	modparm(8) = 0.05 ! z_mort_1
	219	modparm(9) = 1.0 ! z_mort_2
	220	modparm(10) = ( xthetapn + xthetapd ) / 2.0 ! c2n_p
	221	modparm(11) = ( xthetazmi + xthetazme ) / 2.0 ! c2n_z
	222	modparm(12) = xthetad ! c2n_d
	223	modparm(13) = 0.01 ! graze_threshold
	224	modparm(14) = 2.0 ! holling_coef
	225	modparm(15) = 0.5 ! graze_sat
	226	modparm(16) = 2.0 ! graze_max
[8428]	227
	228	! Set up assimilation parameters to be passed into balancing routine
	229	! Not sure what assimparm(1) is meant to be, but it doesn't get used
	230	assimparm(2) = balnutext
	231	assimparm(3) = balnutmin
	232	assimparm(4) = r
	233	assimparm(5) = beta_g
	234	assimparm(6) = beta_l
	235	assimparm(7) = beta_m
	236	assimparm(8) = a_g
	237	assimparm(9) = a_l
	238	assimparm(10) = a_m
	239	assimparm(11) = zfracb0
	240	assimparm(12) = zfracb1
	241	assimparm(13) = qrfmax
	242	assimparm(14) = qafmax
	243	assimparm(15) = zrfmax
	244	assimparm(16) = zafmax
	245	assimparm(17) = prfmax
	246	assimparm(18) = incphymin
	247	assimparm(19) = integnstep
	248	assimparm(20) = pthreshold
	249
	250	! Set up external tracer indices array bstate
	251	i_tracer(1) = 1 ! nutrient
	252	i_tracer(2) = 2 ! phytoplankton
	253	i_tracer(3) = 3 ! zooplankton
	254	i_tracer(4) = 4 ! detritus
	255	i_tracer(5) = 5 ! DIC
	256	i_tracer(6) = 6 ! Alkalinity
	257
	258	! Set background state
[13097]	259	bstate_3d(:,:,:,i_tracer(1)) = tracer_bkg(:,:,:,jpdin)
	260	bstate_3d(:,:,:,i_tracer(2)) = tracer_bkg(:,:,:,jpphn) + tracer_bkg(:,:,:,jpphd)
	261	bstate_3d(:,:,:,i_tracer(3)) = tracer_bkg(:,:,:,jpzmi) + tracer_bkg(:,:,:,jpzme)
	262	bstate_3d(:,:,:,i_tracer(4)) = tracer_bkg(:,:,:,jpdet)
	263	bstate_3d(:,:,:,i_tracer(5)) = tracer_bkg(:,:,:,jpdic)
	264	bstate_3d(:,:,:,i_tracer(6)) = tracer_bkg(:,:,:,jpalk)
[8428]	265
[8436]	266	! Calculate carbon to chlorophyll ratio for combined phytoplankton
	267	! and nitrogen to biomass equivalent for PZD
	268	! Hardwire nitrogen mass to 14.01 for now as it doesn't seem to be set in MEDUSA
[13097]	269	cchl_p_3d(:,:,:) = 0.0
	270	DO jk = 1, jpk
	271	DO jj = 1, jpj
	272	DO ji = 1, jpi
	273	IF ( ( tracer_bkg(ji,jj,jk,jpchn) + tracer_bkg(ji,jj,jk,jpchd ) ) .GT. 0.0 ) THEN
	274	cchl_p_3d(ji,jj,jk) = xmassc * ( ( tracer_bkg(ji,jj,jk,jpphn) * xthetapn ) + &
	275	& ( tracer_bkg(ji,jj,jk,jpphd) * xthetapd ) ) / &
	276	& ( tracer_bkg(ji,jj,jk,jpchn) + tracer_bkg(ji,jj,jk,jpchd ) )
	277	ENDIF
	278	END DO
[8436]	279	END DO
	280	END DO
	281	n2be_p = 14.01 + ( xmassc * ( ( xthetapn + xthetapd ) / 2.0 ) )
	282	n2be_z = 14.01 + ( xmassc * ( ( xthetazmi + xthetazme ) / 2.0 ) )
	283	n2be_d = 14.01 + ( xmassc * xthetad )
	284
[8428]	285	! Call nitrogen balancing routine
[13097]	286	IF (kdeps == 1) THEN
	287	pinc_chltot_2d(:,:) = pinc_chltot_3d(:,:,1)
	288	cchl_p_2d(:,:) = cchl_p_3d(:,:,1)
	289	phyt_avg_bkg_2d(:,:) = phyt_avg_bkg_3d(:,:,1)
	290	pgrow_avg_bkg_2d(:,:) = pgrow_avg_bkg_3d(:,:,1)
	291	ploss_avg_bkg_2d(:,:) = ploss_avg_bkg_3d(:,:,1)
	292
	293	CALL bio_analysis( jpi, jpj, jpk, gdepw_n(:,:,2:jpk), i_tracer, modparm, &
	294	& n2be_p, n2be_z, n2be_d, assimparm, &
	295	& INT(pincper), 1, INT(SUM(tmask,3)), tmask(:,:,:), &
	296	& pmld(:,:), mld_max_bkg(:,:), pinc_chltot_2d(:,:), cchl_p_2d(:,:), &
	297	& nbal_active, phyt_avg_bkg_2d(:,:), &
	298	& gl_active, pgrow_avg_bkg_2d(:,:), ploss_avg_bkg_2d(:,:), &
	299	& subsurf_active, deepneg_active, &
	300	& deeppos_active, nutprof_active, &
	301	& bstate_3d, outincs_3d, &
	302	& diag_active, diag, &
	303	& diag_fulldepth_active, diag_fulldepth_3d )
	304	ELSE
	305	pmld(:,:) = 0.5
	306
	307	DO jk = 1, kdeps
	308	pinc_chltot_2d(:,:) = pinc_chltot_3d(:,:,jk)
	309	cchl_p_2d(:,:) = cchl_p_3d(:,:,jk)
	310	phyt_avg_bkg_2d(:,:) = phyt_avg_bkg_3d(:,:,jk)
	311	pgrow_avg_bkg_2d(:,:) = pgrow_avg_bkg_3d(:,:,jk)
	312	ploss_avg_bkg_2d(:,:) = ploss_avg_bkg_3d(:,:,jk)
	313	tmask_2d(:,:,1) = tmask(:,:,jk)
	314	bstate_2d(:,:,1,:) = bstate_3d(:,:,jk,:)
	315	outincs_2d(:,:,:,:) = 0.0
	316
	317	CALL bio_analysis( jpi, jpj, 1, gdepw_n(:,:,2), i_tracer, modparm, &
	318	& n2be_p, n2be_z, n2be_d, assimparm, &
	319	& INT(pincper), 1, INT(SUM(tmask_2d,3)), tmask_2d(:,:,:), &
	320	& pmld(:,:), pmld(:,:), pinc_chltot_2d(:,:), cchl_p_2d(:,:), &
	321	& nbal_active, phyt_avg_bkg_2d(:,:), &
	322	& gl_active, pgrow_avg_bkg_2d(:,:), ploss_avg_bkg_2d(:,:), &
	323	& subsurf_active, deepneg_active, &
	324	& deeppos_active, nutprof_active, &
	325	& bstate_2d, outincs_2d, &
	326	& diag_active, diag, &
	327	& diag_fulldepth_active, diag_fulldepth_2d )
	328
	329	outincs_3d(:,:,jk,:) = outincs_2d(:,:,1,:)
	330	END DO
	331	ENDIF
[8436]	332
	333	! Loop over each grid point partioning the increments
[13097]	334	phyto_balinc(:,:,:,:) = 0.0
[8436]	335	DO jk = 1, jpk
[13097]	336	IF (kdeps == 1) THEN
	337	jkinc = 1
	338	ELSE
	339	IF (jk > kdeps) THEN
	340	EXIT
	341	ENDIF
	342	jkinc = jk
	343	ENDIF
[8436]	344	DO jj = 1, jpj
	345	DO ji = 1, jpi
	346
[9435]	347	! Phytoplankton
	348	IF ( ( tracer_bkg(ji,jj,jk,jpphn) > 0.0 ) .AND. &
	349	& ( tracer_bkg(ji,jj,jk,jpphd) > 0.0 ) .AND. &
[13097]	350	& ( pinc_chltot_3d(ji,jj,jkinc) /= 0.0 ) ) THEN
[9435]	351	IF ( ld_chltot ) THEN
	352	! Phytoplankton nitrogen split up based on existing ratios
	353	zfrac_phn = tracer_bkg(ji,jj,jk,jpphn) / &
	354	& (tracer_bkg(ji,jj,jk,jpphn) + tracer_bkg(ji,jj,jk,jpphd))
	355	zfrac_phd = tracer_bkg(ji,jj,jk,jpphd) / &
	356	& (tracer_bkg(ji,jj,jk,jpphn) + tracer_bkg(ji,jj,jk,jpphd))
	357	ELSE IF ( ld_chldia .AND. ld_chlnon ) THEN
	358	! Phytoplankton nitrogen split up based on assimilation increments
[13097]	359	zfrac_phn = pinc_chlnon_3d(ji,jj,jkinc) / pinc_chltot_3d(ji,jj,jkinc)
	360	zfrac_phd = pinc_chldia_3d(ji,jj,jkinc) / pinc_chltot_3d(ji,jj,jkinc)
[9435]	361	ENDIF
	362
	363	! Phytoplankton silicate split up based on existing ratios
[8440]	364	zrat_pds_phd = tracer_bkg(ji,jj,jk,jppds) / tracer_bkg(ji,jj,jk,jpphd)
[9435]	365
[8436]	366	! Chlorophyll split up based on existing ratios to phytoplankton nitrogen
[9431]	367	! Not using pinc_chltot directly as it's only 2D
	368	! This method should give same results at surface as splitting pinc_chltot would
[8440]	369	zrat_chn_phn = tracer_bkg(ji,jj,jk,jpchn) / tracer_bkg(ji,jj,jk,jpphn)
	370	zrat_chd_phd = tracer_bkg(ji,jj,jk,jpchd) / tracer_bkg(ji,jj,jk,jpphd)
[9435]	371
[13097]	372	phyto_balinc(ji,jj,jk,jpphn) = outincs_3d(ji,jj,jk,i_tracer(2)) * zfrac_phn
	373	phyto_balinc(ji,jj,jk,jpphd) = outincs_3d(ji,jj,jk,i_tracer(2)) * zfrac_phd
	374	phyto_balinc(ji,jj,jk,jppds) = phyto_balinc(ji,jj,jk,jpphd) * zrat_pds_phd
	375	phyto_balinc(ji,jj,jk,jpchn) = phyto_balinc(ji,jj,jk,jpphn) * zrat_chn_phn
	376	phyto_balinc(ji,jj,jk,jpchd) = phyto_balinc(ji,jj,jk,jpphd) * zrat_chd_phd
[8436]	377	ENDIF
	378
[9435]	379	! Zooplankton nitrogen split up based on existing ratios
[8440]	380	IF ( ( tracer_bkg(ji,jj,jk,jpzmi) > 0.0 ) .AND. ( tracer_bkg(ji,jj,jk,jpzme) > 0.0 ) ) THEN
[9435]	381	zfrac_zmi = tracer_bkg(ji,jj,jk,jpzmi) / &
	382	& (tracer_bkg(ji,jj,jk,jpzmi) + tracer_bkg(ji,jj,jk,jpzme))
	383	zfrac_zme = tracer_bkg(ji,jj,jk,jpzme) / &
	384	& (tracer_bkg(ji,jj,jk,jpzmi) + tracer_bkg(ji,jj,jk,jpzme))
[13097]	385	phyto_balinc(ji,jj,jk,jpzmi) = outincs_3d(ji,jj,jk,i_tracer(3)) * zfrac_zmi
	386	phyto_balinc(ji,jj,jk,jpzme) = outincs_3d(ji,jj,jk,i_tracer(3)) * zfrac_zme
[8436]	387	ENDIF
	388
	389	! Nitrogen nutrient straight from balancing scheme
[13097]	390	phyto_balinc(ji,jj,jk,jpdin) = outincs_3d(ji,jj,jk,i_tracer(1))
[8436]	391
	392	! Nitrogen detritus straight from balancing scheme
[13097]	393	phyto_balinc(ji,jj,jk,jpdet) = outincs_3d(ji,jj,jk,i_tracer(4))
[8436]	394
	395	! DIC straight from balancing scheme
[13097]	396	phyto_balinc(ji,jj,jk,jpdic) = outincs_3d(ji,jj,jk,i_tracer(5))
[8436]	397
	398	! Alkalinity straight from balancing scheme
[13097]	399	phyto_balinc(ji,jj,jk,jpalk) = outincs_3d(ji,jj,jk,i_tracer(6))
[8436]	400
	401	! Remove diatom silicate increment from nutrient silicate to conserve mass
[13097]	402	IF ( ( tracer_bkg(ji,jj,jk,jpsil) - phyto_balinc(ji,jj,jk,jppds) ) > 0.0 ) THEN
	403	phyto_balinc(ji,jj,jk,jpsil) = phyto_balinc(ji,jj,jk,jppds) * (-1.0)
[8436]	404	ENDIF
	405
[9435]	406	! Carbon detritus based on existing ratios
[8440]	407	IF ( ( tracer_bkg(ji,jj,jk,jpdet) > 0.0 ) .AND. ( tracer_bkg(ji,jj,jk,jpdtc) > 0.0 ) ) THEN
	408	zrat_dtc_det = tracer_bkg(ji,jj,jk,jpdtc) / tracer_bkg(ji,jj,jk,jpdet)
[13097]	409	phyto_balinc(ji,jj,jk,jpdtc) = phyto_balinc(ji,jj,jk,jpdet) * zrat_dtc_det
[8436]	410	ENDIF
	411
	412	! Do nothing with iron or oxygen for the time being
[13097]	413	phyto_balinc(ji,jj,jk,jpfer) = 0.0
	414	phyto_balinc(ji,jj,jk,jpoxy) = 0.0
[8436]	415
	416	END DO
	417	END DO
	418	END DO
[8428]	419
	420	ELSE ! No nitrogen balancing
	421
[8436]	422	! Initialise individual chlorophyll increments to zero
[13097]	423	phyto_balinc(:,:,:,jpchn) = 0.0
	424	phyto_balinc(:,:,:,jpchd) = 0.0
[8428]	425
[8436]	426	! Split up total surface chlorophyll increments
[13097]	427	DO jk = 1, kdeps
	428	DO jj = 1, jpj
	429	DO ji = 1, jpi
	430	IF ( ( tracer_bkg(ji,jj,jk,jpchn) > 0.0 ) .AND. &
	431	& ( tracer_bkg(ji,jj,jk,jpchd) > 0.0 ) ) THEN
	432	IF ( ld_chltot ) THEN
	433	! Chlorophyll split up based on existing ratios
	434	zfrac_chn = tracer_bkg(ji,jj,jk,jpchn) / &
	435	& ( tracer_bkg(ji,jj,jk,jpchn) + tracer_bkg(ji,jj,jk,jpchd) )
	436	zfrac_chd = tracer_bkg(ji,jj,jk,jpchd) / &
	437	& ( tracer_bkg(ji,jj,jk,jpchn) + tracer_bkg(ji,jj,jk,jpchd) )
	438	phyto_balinc(ji,jj,jk,jpchn) = pinc_chltot_3d(ji,jj,jk) * zfrac_chn
	439	phyto_balinc(ji,jj,jk,jpchd) = pinc_chltot_3d(ji,jj,jk) * zfrac_chd
	440	ENDIF
	441	IF( ld_chldia ) THEN
	442	phyto_balinc(ji,jj,jk,jpchd) = pinc_chldia_3d(ji,jj,jk)
	443	ENDIF
	444	IF( ld_chlnon ) THEN
	445	phyto_balinc(ji,jj,jk,jpchn) = pinc_chlnon_3d(ji,jj,jk)
	446	ENDIF
	447
	448	! Maintain stoichiometric ratios of nitrogen and silicate
	449	IF ( ld_chltot .OR. ld_chlnon ) THEN
	450	zrat_phn_chn = tracer_bkg(ji,jj,jk,jpphn) / tracer_bkg(ji,jj,jk,jpchn)
	451	phyto_balinc(ji,jj,jk,jpphn) = phyto_balinc(ji,jj,jk,jpchn) * zrat_phn_chn
	452	ENDIF
	453	IF ( ld_chltot .OR. ld_chldia ) THEN
	454	zrat_phd_chd = tracer_bkg(ji,jj,jk,jpphd) / tracer_bkg(ji,jj,jk,jpchd)
	455	phyto_balinc(ji,jj,jk,jpphd) = phyto_balinc(ji,jj,jk,jpchd) * zrat_phd_chd
	456	zrat_pds_chd = tracer_bkg(ji,jj,jk,jppds) / tracer_bkg(ji,jj,jk,jpchd)
	457	phyto_balinc(ji,jj,jk,jppds) = phyto_balinc(ji,jj,jk,jpchd) * zrat_pds_chd
	458	ENDIF
[9435]	459	ENDIF
[13097]	460	END DO
[8436]	461	END DO
	462	END DO
[8428]	463
[13097]	464	IF (kdeps == 1) THEN
	465	! Propagate through mixed layer
	466	DO jj = 1, jpj
	467	DO ji = 1, jpi
	468	!
	469	jkmax = jpk-1
	470	DO jk = jpk-1, 1, -1
	471	IF ( ( pmld(ji,jj) > gdepw_n(ji,jj,jk) ) .AND. &
	472	& ( pmld(ji,jj) <= gdepw_n(ji,jj,jk+1) ) ) THEN
	473	pmld(ji,jj) = gdepw_n(ji,jj,jk+1)
	474	jkmax = jk
	475	ENDIF
	476	END DO
	477	!
	478	DO jk = 2, jkmax
	479	phyto_balinc(ji,jj,jk,jpchn) = phyto_balinc(ji,jj,1,jpchn)
	480	phyto_balinc(ji,jj,jk,jpchd) = phyto_balinc(ji,jj,1,jpchd)
	481	phyto_balinc(ji,jj,jk,jpphn) = phyto_balinc(ji,jj,1,jpphn)
	482	phyto_balinc(ji,jj,jk,jpphd) = phyto_balinc(ji,jj,1,jpphd)
	483	phyto_balinc(ji,jj,jk,jppds) = phyto_balinc(ji,jj,1,jppds)
	484	END DO
	485	!
[8428]	486	END DO
	487	END DO
[13097]	488	ENDIF
[8428]	489
	490	! Set other balancing increments to zero
[13097]	491	phyto_balinc(:,:,:,jpzmi) = 0.0
	492	phyto_balinc(:,:,:,jpzme) = 0.0
	493	phyto_balinc(:,:,:,jpdin) = 0.0
	494	phyto_balinc(:,:,:,jpsil) = 0.0
	495	phyto_balinc(:,:,:,jpfer) = 0.0
	496	phyto_balinc(:,:,:,jpdet) = 0.0
	497	phyto_balinc(:,:,:,jpdtc) = 0.0
	498	phyto_balinc(:,:,:,jpdic) = 0.0
	499	phyto_balinc(:,:,:,jpalk) = 0.0
	500	phyto_balinc(:,:,:,jpoxy) = 0.0
[8436]	501
[8428]	502	ENDIF
[8485]	503
	504	! If performing extra tidal mixing in the Indonesian Throughflow,
	505	! increments have been found to make the carbon cycle unstable
	506	! Therefore, mask these out
	507	IF ( ln_tmx_itf ) THEN
	508	DO jn = 1, jptra
	509	DO jk = 1, jpk
[13097]	510	phyto_balinc(:,:,jk,jn) = phyto_balinc(:,:,jk,jn) * ( 1.0 - mask_itf(:,:) )
[8485]	511	END DO
	512	END DO
	513	ENDIF
[8428]	514
[13097]	515	END SUBROUTINE asm_phyto_bal_medusa
[8428]	516
	517	#else
	518	!!----------------------------------------------------------------------
	519	!! Default option : Empty routine
	520	!!----------------------------------------------------------------------
	521	CONTAINS
[13097]	522	SUBROUTINE asm_phyto_bal_medusa( kdeps, &
	523	& ld_chltot, &
	524	& pinc_chltot_3d, &
	525	& ld_chldia, &
	526	& pinc_chldia_3d, &
	527	& ld_chlnon, &
	528	& pinc_chlnon_3d, &
	529	& ld_phytot, &
	530	& pinc_phytot_3d, &
	531	& ld_phydia, &
	532	& pinc_phydia_3d, &
	533	& ld_phynon, &
	534	& pinc_phynon_3d, &
	535	& pincper, &
	536	& p_maxchlinc, ld_phytobal, pmld, &
	537	& pgrow_avg_bkg_3d, ploss_avg_bkg_3d, &
	538	& phyt_avg_bkg_3d, mld_max_bkg, &
	539	& tracer_bkg, phyto_balinc )
	540	INTEGER :: kdeps
[9431]	541	LOGICAL :: ld_chltot
[13097]	542	REAL :: pinc_chltot_3d(:,:,:)
[9431]	543	LOGICAL :: ld_chldia
[13097]	544	REAL :: pinc_chldia_3d(:,:,:)
[9431]	545	LOGICAL :: ld_chlnon
[13097]	546	REAL :: pinc_chlnon_3d(:,:,:)
[9431]	547	LOGICAL :: ld_phytot
[13097]	548	REAL :: pinc_phytot_3d(:,:,:)
[9431]	549	LOGICAL :: ld_phydia
[13097]	550	REAL :: pinc_phydia_3d(:,:,:)
[9431]	551	LOGICAL :: ld_phynon
[13097]	552	REAL :: pinc_phynon_3d(:,:,:)
[9431]	553	REAL :: pincper
	554	REAL :: p_maxchlinc
	555	LOGICAL :: ld_phytobal
	556	REAL :: pmld(:,:)
[13097]	557	REAL :: pgrow_avg_bkg_3d(:,:,:)
	558	REAL :: ploss_avg_bkg_3d(:,:,:)
	559	REAL :: phyt_avg_bkg_3d(:,:,:)
[8440]	560	REAL :: mld_max_bkg(:,:)
	561	REAL :: tracer_bkg(:,:,:,:)
[13097]	562	REAL :: phyto_balinc(:,:,:,:)
	563	WRITE(,) 'asm_phyto_bal_medusa: You should not have seen this print! error?'
	564	END SUBROUTINE asm_phyto_bal_medusa
[8428]	565	#endif
	566
	567	!!======================================================================
[13097]	568	END MODULE asmphytobal_medusa

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