Context Navigation

asminc.F90 @ 7803

Last change on this file since 7803 was 7803, checked in by dford, 7 years ago
Merge in changes to allow a maximum chlorophyll assimilation increment to be specified. See internal UKMO ticket 690.
File size: 66.0 KB

Line
1	MODULE asminc
2	!!======================================================================
3	!! * MODULE asminc *
4	!! Assimilation increment : Apply an increment generated by data
5	!! assimilation
6	!!======================================================================
7	!! History : ! 2007-03 (M. Martin) Met Office version
8	!! ! 2007-04 (A. Weaver) calc_date original code
9	!! ! 2007-04 (A. Weaver) Merge with OPAVAR/NEMOVAR
10	!! NEMO 3.3 ! 2010-05 (D. Lea) Update to work with NEMO v3.2
11	!! - ! 2010-05 (D. Lea) add calc_month_len routine based on day_init
12	!! 3.4 ! 2012-10 (A. Weaver and K. Mogensen) Fix for direct initialization
13	!!----------------------------------------------------------------------
14
15	!!----------------------------------------------------------------------
16	!! 'key_asminc' : Switch on the assimilation increment interface
17	!!----------------------------------------------------------------------
18	!! asm_inc_init : Initialize the increment arrays and IAU weights
19	!! calc_date : Compute the calendar date YYYYMMDD on a given step
20	!! tra_asm_inc : Apply the tracer (T and S) increments
21	!! dyn_asm_inc : Apply the dynamic (u and v) increments
22	!! ssh_asm_inc : Apply the SSH increment
23	!! seaice_asm_inc : Apply the seaice increment
24	!! logchl_asm_inc : Apply the logchl increment
25	!!----------------------------------------------------------------------
26	USE wrk_nemo ! Memory Allocation
27	USE par_oce ! Ocean space and time domain variables
28	USE dom_oce ! Ocean space and time domain
29	USE domvvl ! domain: variable volume level
30	USE oce ! Dynamics and active tracers defined in memory
31	USE ldfdyn_oce ! ocean dynamics: lateral physics
32	USE eosbn2 ! Equation of state - in situ and potential density
33	USE zpshde ! Partial step : Horizontal Derivative
34	USE iom ! Library to read input files
35	USE asmpar ! Parameters for the assmilation interface
36	USE c1d ! 1D initialization
37	USE in_out_manager ! I/O manager
38	USE lib_mpp ! MPP library
39	#if defined key_lim2
40	USE ice_2 ! LIM2
41	#endif
42	USE sbc_oce ! Surface boundary condition variables.
43	USE zdfmxl, ONLY : &
44	& hmld_tref, &
45	#if defined key_karaml
46	& hmld_kara, &
47	& ln_kara, &
48	#endif
49	& hmld, &
50	& hmlp, &
51	& hmlpt
52	#if defined key_bdy
53	USE bdy_oce, ONLY: bdytmask
54	#endif
55	#if defined key_top
56	USE trc, ONLY: &
57	& trn, &
58	& trb
59	USE par_trc, ONLY: &
60	& jptra
61	#endif
62	#if defined key_fabm
63	USE asmlogchlbal_ersem, ONLY: &
64	& asm_logchl_bal_ersem
65	USE par_fabm
66	#elif defined key_medusa && defined key_foam_medusa
67	USE asmlogchlbal_medusa, ONLY: &
68	& asm_logchl_bal_medusa
69	USE par_medusa
70	#elif defined key_hadocc
71	USE asmlogchlbal_hadocc, ONLY: &
72	& asm_logchl_bal_hadocc
73	USE par_hadocc
74	#endif
75
76	IMPLICIT NONE
77	PRIVATE
78
79	PUBLIC asm_inc_init !: Initialize the increment arrays and IAU weights
80	PUBLIC calc_date !: Compute the calendar date YYYYMMDD on a given step
81	PUBLIC tra_asm_inc !: Apply the tracer (T and S) increments
82	PUBLIC dyn_asm_inc !: Apply the dynamic (u and v) increments
83	PUBLIC ssh_asm_inc !: Apply the SSH increment
84	PUBLIC seaice_asm_inc !: Apply the seaice increment
85	PUBLIC logchl_asm_inc !: Apply the logchl increment
86
87	#if defined key_asminc
88	LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .TRUE. !: Logical switch for assimilation increment interface
89	#else
90	LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .FALSE. !: No assimilation increments
91	#endif
92	LOGICAL, PUBLIC :: ln_bkgwri = .FALSE. !: No output of the background state fields
93	LOGICAL, PUBLIC :: ln_balwri = .FALSE. !: No output of the assimilation balancing increments
94	LOGICAL, PUBLIC :: ln_avgbkg = .FALSE. !: No output of the mean background state fields
95	LOGICAL, PUBLIC :: ln_asmiau = .FALSE. !: No applying forcing with an assimilation increment
96	LOGICAL, PUBLIC :: ln_asmdin = .FALSE. !: No direct initialization
97	LOGICAL, PUBLIC :: ln_trainc = .FALSE. !: No tracer (T and S) assimilation increments
98	LOGICAL, PUBLIC :: ln_dyninc = .FALSE. !: No dynamics (u and v) assimilation increments
99	LOGICAL, PUBLIC :: ln_sshinc = .FALSE. !: No sea surface height assimilation increment
100	LOGICAL, PUBLIC :: ln_seaiceinc = .FALSE. !: No sea ice concentration increment
101	LOGICAL, PUBLIC :: ln_logchltotinc = .FALSE. !: No total log10(chlorophyll) increment
102	LOGICAL, PUBLIC :: ln_logchlpftinc = .FALSE. !: No PFT log10(chlorophyll) increment
103	LOGICAL, PUBLIC :: ln_salfix = .FALSE. !: Apply minimum salinity check
104	LOGICAL, PUBLIC :: ln_temnofreeze = .FALSE. !: Don't allow the temperature to drop below freezing
105	INTEGER, PUBLIC :: nn_divdmp !: Apply divergence damping filter nn_divdmp times
106
107	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkg , s_bkg !: Background temperature and salinity
108	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkg , v_bkg !: Background u- & v- velocity components
109	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkginc, s_bkginc !: Increment to the background T & S
110	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkginc, v_bkginc !: Increment to the u- & v-components
111	REAL(wp), PUBLIC, DIMENSION(:) , ALLOCATABLE :: wgtiau !: IAU weights for each time step
112	#if defined key_asminc
113	REAL(wp), PUBLIC, DIMENSION(:,:), ALLOCATABLE :: ssh_iau !: IAU-weighted sea surface height increment
114	#endif
115	! !!! time steps relative to the cycle interval [0,nitend-nit000-1]
116	INTEGER , PUBLIC :: nitbkg !: Time step of the background state used in the Jb term
117	INTEGER , PUBLIC :: nitdin !: Time step of the background state for direct initialization
118	INTEGER , PUBLIC :: nitiaustr !: Time step of the start of the IAU interval
119	INTEGER , PUBLIC :: nitiaufin !: Time step of the end of the IAU interval
120	INTEGER , PUBLIC :: nitavgbkg !: Number of timesteps to average assim bkg [0,nitavgbkg]
121	!
122	INTEGER , PUBLIC :: niaufn !: Type of IAU weighing function: = 0 Constant weighting
123	! !: = 1 Linear hat-like, centred in middle of IAU interval
124	REAL(wp), PUBLIC :: salfixmin !: Ensure that the salinity is larger than this value if (ln_salfix)
125
126	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ssh_bkg, ssh_bkginc ! Background sea surface height and its increment
127	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: seaice_bkginc ! Increment to the background sea ice conc
128
129	REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: logchl_bkginc !: Increment to background logchl
130	#if defined key_top
131	REAL(wp), PUBLIC, DIMENSION(:,:,:,:), ALLOCATABLE :: logchl_balinc !: Increment to BGC variables from logchl assim
132	#endif
133	REAL(wp) :: rn_maxchlinc = -999.0 !: maximum absolute non-log chlorophyll increment from logchl assimilation
134	!: <= 0 implies no maximum applied (switch turned off)
135	!: > 0 implies maximum absolute chl increment capped at this value
136
137	INTEGER :: mld_choice = 4 !: choice of mld criteria to use for physics assimilation
138	!: 1) hmld - Turbocline/mixing depth [W points]
139	!: 2) hmlp - Density criterion (0.01 kg/m^3 change from 10m) [W points]
140	!: 3) hmld_kara - Kara MLD [Interpolated]
141	!: 4) hmld_tref - Temperature criterion (0.2 K change from surface) [T points]
142
143	INTEGER :: mld_choice_bgc = 4 !: choice of mld criteria to use for physics assimilation
144	!: 1) hmld - Turbocline/mixing depth [W points]
145	!: 2) hmlp - Density criterion (0.01 kg/m^3 change from 10m) [W points]
146	!: 3) hmld_kara - Kara MLD [Interpolated]
147	!: 4) hmld_tref - Temperature criterion (0.2 K change from surface) [T points]
148	!: 5) hmlpt - Density criterion (0.01 kg/m^3 change from 10m) [T points]
149
150	INTEGER :: nn_asmpfts = 0 !: number of logchl PFTs assimilated
151
152	!! * Substitutions
153	# include "domzgr_substitute.h90"
154	# include "ldfdyn_substitute.h90"
155	# include "vectopt_loop_substitute.h90"
156	!!----------------------------------------------------------------------
157	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
158	!! $Id$
159	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
160	!!----------------------------------------------------------------------
161	CONTAINS
162
163	SUBROUTINE asm_inc_init
164	!!----------------------------------------------------------------------
165	!! * ROUTINE asm_inc_init *
166	!!
167	!! ** Purpose : Initialize the assimilation increment and IAU weights.
168	!!
169	!! ** Method : Initialize the assimilation increment and IAU weights.
170	!!
171	!! ** Action :
172	!!----------------------------------------------------------------------
173	INTEGER :: ji, jj, jk, jt ! dummy loop indices
174	INTEGER :: imid, inum ! local integers
175	INTEGER :: ios ! Local integer output status for namelist read
176	INTEGER :: iiauper ! Number of time steps in the IAU period
177	INTEGER :: icycper ! Number of time steps in the cycle
178	INTEGER :: iitend_date ! Date YYYYMMDD of final time step
179	INTEGER :: iitbkg_date ! Date YYYYMMDD of background time step for Jb term
180	INTEGER :: iitdin_date ! Date YYYYMMDD of background time step for DI
181	INTEGER :: iitiaustr_date ! Date YYYYMMDD of IAU interval start time step
182	INTEGER :: iitiaufin_date ! Date YYYYMMDD of IAU interval final time step
183	INTEGER :: isurfstat ! Local integer for status of reading surft variable
184	INTEGER :: iitavgbkg_date ! Date YYYYMMDD of end of assim bkg averaging period
185	!
186	REAL(wp) :: znorm ! Normalization factor for IAU weights
187	REAL(wp) :: ztotwgt ! Value of time-integrated IAU weights (should be equal to one)
188	REAL(wp) :: z_inc_dateb ! Start date of interval on which increment is valid
189	REAL(wp) :: z_inc_datef ! End date of interval on which increment is valid
190	REAL(wp) :: zdate_bkg ! Date in background state file for DI
191	REAL(wp) :: zdate_inc ! Time axis in increments file
192	!
193	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: &
194	& t_bkginc_2d ! file for reading in 2D
195	! ! temperature increments
196	REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: &
197	& z_mld ! Mixed layer depth
198
199	REAL(wp), POINTER, DIMENSION(:,:) :: hdiv ! 2D workspace
200	!
201	LOGICAL :: lk_surft ! Logical: T => Increments file contains surft variable
202	! so only apply surft increments.
203	!
204	CHARACTER(LEN=2) :: cl_pftstr
205	!!
206	NAMELIST/nam_asminc/ ln_bkgwri, ln_balwri, ln_avgbkg, &
207	& ln_trainc, ln_dyninc, ln_sshinc, &
208	& ln_logchltotinc, ln_logchlpftinc, &
209	& ln_asmdin, ln_asmiau, &
210	& nitbkg, nitdin, nitiaustr, nitiaufin, niaufn, &
211	& ln_salfix, salfixmin, nn_divdmp, nitavgbkg, mld_choice, &
212	& mld_choice_bgc, rn_maxchlinc
213	!!----------------------------------------------------------------------
214
215	!-----------------------------------------------------------------------
216	! Read Namelist nam_asminc : assimilation increment interface
217	!-----------------------------------------------------------------------
218
219	! Set default values
220	ln_bkgwri = .FALSE.
221	ln_balwri = .FALSE.
222	ln_avgbkg = .FALSE.
223	ln_trainc = .FALSE.
224	ln_dyninc = .FALSE.
225	ln_sshinc = .FALSE.
226	ln_seaiceinc = .FALSE.
227	ln_logchltotinc = .FALSE.
228	ln_logchlpftinc = .FALSE.
229	ln_asmdin = .FALSE.
230	ln_asmiau = .TRUE.
231	ln_salfix = .FALSE.
232	ln_temnofreeze = .FALSE.
233	salfixmin = -9999
234	nitbkg = 0
235	nitdin = 0
236	nitiaustr = 1
237	nitiaufin = 150
238	niaufn = 0
239	nitavgbkg = 1
240	#if defined key_fabm
241	nn_asmpfts = 4
242	#elif defined key_medusa && defined key_foam_medusa
243	nn_asmpfts = 2
244	#elif defined key_hadocc
245	nn_asmpfts = 1
246	#else
247	nn_asmpfts = 0
248	#endif
249
250	REWIND( numnam_ref ) ! Namelist nam_asminc in reference namelist : Assimilation increment
251	READ ( numnam_ref, nam_asminc, IOSTAT = ios, ERR = 901)
252	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in reference namelist', lwp )
253
254	REWIND( numnam_cfg ) ! Namelist nam_asminc in configuration namelist : Assimilation increment
255	READ ( numnam_cfg, nam_asminc, IOSTAT = ios, ERR = 902 )
256	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in configuration namelist', lwp )
257	IF(lwm) WRITE ( numond, nam_asminc )
258
259	IF ( ln_logchltotinc ) THEN
260	nn_asmpfts = 1
261	ELSE IF ( .NOT.( ln_logchlpftinc ) ) THEN
262	nn_asmpfts = 0
263	ENDIF
264
265	! Control print
266	IF(lwp) THEN
267	WRITE(numout,*)
268	WRITE(numout,*) 'asm_inc_init : Assimilation increment initialization :'
269	WRITE(numout,*) '~~~~~~~~~~~~'
270	WRITE(numout,*) ' Namelist namasm : set assimilation increment parameters'
271	WRITE(numout,*) ' Logical switch for writing out background state ln_bkgwri = ', ln_bkgwri
272	WRITE(numout,*) ' Logical switch for writing out balancing increments ln_balwri = ', ln_balwri
273	WRITE(numout,*) ' Logical switch for writing mean background state ln_avgbkg = ', ln_avgbkg
274	WRITE(numout,*) ' Logical switch for applying tracer increments ln_trainc = ', ln_trainc
275	WRITE(numout,*) ' Logical switch for applying velocity increments ln_dyninc = ', ln_dyninc
276	WRITE(numout,*) ' Logical switch for applying SSH increments ln_sshinc = ', ln_sshinc
277	WRITE(numout,*) ' Logical switch for Direct Initialization (DI) ln_asmdin = ', ln_asmdin
278	WRITE(numout,*) ' Logical switch for applying sea ice increments ln_seaiceinc = ', ln_seaiceinc
279	WRITE(numout,*) ' Logical switch for applying total logchl incs ln_logchltotinc = ', ln_logchltotinc
280	WRITE(numout,*) ' Logical switch for applying PFT logchl incs ln_logchlpftinc = ', ln_logchlpftinc
281	WRITE(numout,*) ' Number of logchl PFTs assimilated nn_asmpfts = ', nn_asmpfts
282	WRITE(numout,*) ' Logical switch for Incremental Analysis Updating (IAU) ln_asmiau = ', ln_asmiau
283	WRITE(numout,*) ' Timestep of background in [0,nitend-nit000-1] nitbkg = ', nitbkg
284	WRITE(numout,*) ' Timestep of background for DI in [0,nitend-nit000-1] nitdin = ', nitdin
285	WRITE(numout,*) ' Timestep of start of IAU interval in [0,nitend-nit000-1] nitiaustr = ', nitiaustr
286	WRITE(numout,*) ' Timestep of end of IAU interval in [0,nitend-nit000-1] nitiaufin = ', nitiaufin
287	WRITE(numout,*) ' Number of timesteps to average assim bkg [0,nitavgbkg] nitavgbkg = ', nitavgbkg
288	WRITE(numout,*) ' Type of IAU weighting function niaufn = ', niaufn
289	WRITE(numout,*) ' Logical switch for ensuring that the sa > salfixmin ln_salfix = ', ln_salfix
290	WRITE(numout,*) ' Minimum salinity after applying the increments salfixmin = ', salfixmin
291	WRITE(numout,*) ' Choice of MLD for physics assimilation mld_choice = ', mld_choice
292	WRITE(numout,*) ' Choice of MLD for BGC assimilation mld_choice_bgc = ', mld_choice_bgc
293	WRITE(numout,*) ' Maximum absolute chlorophyll increment (<=0 = off) rn_maxchlinc = ', rn_maxchlinc
294	ENDIF
295
296	nitbkg_r = nitbkg + nit000 - 1 ! Background time referenced to nit000
297	nitdin_r = nitdin + nit000 - 1 ! Background time for DI referenced to nit000
298	nitiaustr_r = nitiaustr + nit000 - 1 ! Start of IAU interval referenced to nit000
299	nitiaufin_r = nitiaufin + nit000 - 1 ! End of IAU interval referenced to nit000
300	nitavgbkg_r = nitavgbkg + nit000 - 1 ! Averaging period referenced to nit000
301
302	iiauper = nitiaufin_r - nitiaustr_r + 1 ! IAU interval length
303	icycper = nitend - nit000 + 1 ! Cycle interval length
304
305	CALL calc_date( nit000, nitend , ndate0, iitend_date ) ! Date of final time step
306	CALL calc_date( nit000, nitbkg_r , ndate0, iitbkg_date ) ! Background time for Jb referenced to ndate0
307	CALL calc_date( nit000, nitdin_r , ndate0, iitdin_date ) ! Background time for DI referenced to ndate0
308	CALL calc_date( nit000, nitiaustr_r, ndate0, iitiaustr_date ) ! IAU start time referenced to ndate0
309	CALL calc_date( nit000, nitiaufin_r, ndate0, iitiaufin_date ) ! IAU end time referenced to ndate0
310	CALL calc_date( nit000, nitavgbkg_r, ndate0, iitavgbkg_date ) ! End of assim bkg averaging period referenced to ndate0
311	!
312	IF(lwp) THEN
313	WRITE(numout,*)
314	WRITE(numout,*) ' Time steps referenced to current cycle:'
315	WRITE(numout,*) ' iitrst = ', nit000 - 1
316	WRITE(numout,*) ' nit000 = ', nit000
317	WRITE(numout,*) ' nitend = ', nitend
318	WRITE(numout,*) ' nitbkg_r = ', nitbkg_r
319	WRITE(numout,*) ' nitdin_r = ', nitdin_r
320	WRITE(numout,*) ' nitiaustr_r = ', nitiaustr_r
321	WRITE(numout,*) ' nitiaufin_r = ', nitiaufin_r
322	WRITE(numout,*) ' nitavgbkg_r = ', nitavgbkg_r
323	WRITE(numout,*)
324	WRITE(numout,*) ' Dates referenced to current cycle:'
325	WRITE(numout,*) ' ndastp = ', ndastp
326	WRITE(numout,*) ' ndate0 = ', ndate0
327	WRITE(numout,*) ' iitend_date = ', iitend_date
328	WRITE(numout,*) ' iitbkg_date = ', iitbkg_date
329	WRITE(numout,*) ' iitdin_date = ', iitdin_date
330	WRITE(numout,*) ' iitiaustr_date = ', iitiaustr_date
331	WRITE(numout,*) ' iitiaufin_date = ', iitiaufin_date
332	WRITE(numout,*) ' iitavgbkg_date = ', iitavgbkg_date
333	ENDIF
334
335	IF ( nacc /= 0 ) &
336	& CALL ctl_stop( ' nacc /= 0 and key_asminc :', &
337	& ' Assimilation increments have only been implemented', &
338	& ' for synchronous time stepping' )
339
340	IF ( ( ln_asmdin ).AND.( ln_asmiau ) ) &
341	& CALL ctl_stop( ' ln_asmdin and ln_asmiau :', &
342	& ' Choose Direct Initialization OR Incremental Analysis Updating')
343
344	IF ( ( ( .NOT. ln_asmdin ).AND.( .NOT. ln_asmiau ) ) &
345	& .AND.( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ).OR.( ln_seaiceinc ).OR. &
346	& ( ln_logchltotinc ).OR.( ln_logchlpftinc ) )) &
347	& CALL ctl_stop( ' One or more of ln_trainc, ln_dyninc, ln_sshinc, ln_seaiceinc,', &
348	& ' ln_logchltotinc, and ln_logchlpftinc is set to .true.', &
349	& ' but ln_asmdin and ln_asmiau are both set to .false. :', &
350	& ' Inconsistent options')
351
352	IF ( ( niaufn /= 0 ).AND.( niaufn /= 1 ) ) &
353	& CALL ctl_stop( ' niaufn /= 0 or niaufn /=1 :', &
354	& ' Type IAU weighting function is invalid')
355
356	IF ( ( .NOT. ln_trainc ).AND.( .NOT. ln_dyninc ).AND.( .NOT. ln_sshinc ).AND.( .NOT. ln_seaiceinc ) &
357	& .AND.( .NOT. ln_logchltotinc ).AND.( .NOT. ln_logchlpftinc ) ) &
358	& CALL ctl_warn( ' ln_trainc, ln_dyninc, ln_sshinc, ln_seaiceinc,', &
359	& ' ln_logchltotinc, and ln_logchlpftinc are set to .false. :', &
360	& ' The assimilation increments are not applied')
361
362	IF ( ( ln_asmiau ).AND.( nitiaustr == nitiaufin ) ) &
363	& CALL ctl_stop( ' nitiaustr = nitiaufin :', &
364	& ' IAU interval is of zero length')
365
366	IF ( ( ln_asmiau ).AND.( ( nitiaustr_r < nit000 ).OR.( nitiaufin_r > nitend ) ) ) &
367	& CALL ctl_stop( ' nitiaustr or nitiaufin :', &
368	& ' IAU starting or final time step is outside the cycle interval', &
369	& ' Valid range nit000 to nitend')
370
371	IF ( ( nitbkg_r < nit000 - 1 ).OR.( nitbkg_r > nitend ) ) &
372	& CALL ctl_stop( ' nitbkg :', &
373	& ' Background time step is outside the cycle interval')
374
375	IF ( ( nitdin_r < nit000 - 1 ).OR.( nitdin_r > nitend ) ) &
376	& CALL ctl_stop( ' nitdin :', &
377	& ' Background time step for Direct Initialization is outside', &
378	& ' the cycle interval')
379
380	IF ( nitavgbkg_r > nitend ) &
381	& CALL ctl_stop( ' nitavgbkg_r :', &
382	& ' Assim bkg averaging period is outside', &
383	& ' the cycle interval')
384
385	IF ( ( ln_logchltotinc ).AND.( ln_logchlpftinc ) ) THEN
386	CALL ctl_stop( ' ln_logchltotinc and ln_logchlpftinc both set:', &
387	& ' These options are not compatible')
388	ENDIF
389
390	IF ( ( ln_balwri ).AND.( .NOT. ( ( ln_logchltotinc ).OR.( ln_logchlpftinc ) ) ) ) THEN
391	CALL ctl_warn( ' Balancing increments are only calculated for logchl', &
392	& ' Not assimilating logchl, so ln_balwri will be set to .false.')
393	ln_balwri = .FALSE.
394	ENDIF
395
396	IF ( nstop > 0 ) RETURN ! if there are any errors then go no further
397
398	!--------------------------------------------------------------------
399	! Initialize the Incremental Analysis Updating weighting function
400	!--------------------------------------------------------------------
401
402	IF ( ln_asmiau ) THEN
403
404	ALLOCATE( wgtiau( icycper ) )
405
406	wgtiau(:) = 0.0
407
408	IF ( niaufn == 0 ) THEN
409
410	!---------------------------------------------------------
411	! Constant IAU forcing
412	!---------------------------------------------------------
413
414	DO jt = 1, iiauper
415	wgtiau(jt+nitiaustr-1) = 1.0 / REAL( iiauper )
416	END DO
417
418	ELSEIF ( niaufn == 1 ) THEN
419
420	!---------------------------------------------------------
421	! Linear hat-like, centred in middle of IAU interval
422	!---------------------------------------------------------
423
424	! Compute the normalization factor
425	znorm = 0.0
426	IF ( MOD( iiauper, 2 ) == 0 ) THEN ! Even number of time steps in IAU interval
427	imid = iiauper / 2
428	DO jt = 1, imid
429	znorm = znorm + REAL( jt )
430	END DO
431	znorm = 2.0 * znorm
432	ELSE ! Odd number of time steps in IAU interval
433	imid = ( iiauper + 1 ) / 2
434	DO jt = 1, imid - 1
435	znorm = znorm + REAL( jt )
436	END DO
437	znorm = 2.0 * znorm + REAL( imid )
438	ENDIF
439	znorm = 1.0 / znorm
440
441	DO jt = 1, imid - 1
442	wgtiau(jt+nitiaustr-1) = REAL( jt ) * znorm
443	END DO
444	DO jt = imid, iiauper
445	wgtiau(jt+nitiaustr-1) = REAL( iiauper - jt + 1 ) * znorm
446	END DO
447
448	ENDIF
449
450	! Test that the integral of the weights over the weighting interval equals 1
451	IF(lwp) THEN
452	WRITE(numout,*)
453	WRITE(numout,*) 'asm_inc_init : IAU weights'
454	WRITE(numout,*) '~~~~~~~~~~~~'
455	WRITE(numout,*) ' time step IAU weight'
456	WRITE(numout,*) ' ========= ====================='
457	ztotwgt = 0.0
458	DO jt = 1, icycper
459	ztotwgt = ztotwgt + wgtiau(jt)
460	WRITE(numout,*) ' ', jt, ' ', wgtiau(jt)
461	END DO
462	WRITE(numout,*) ' ==================================='
463	WRITE(numout,*) ' Time-integrated weight = ', ztotwgt
464	WRITE(numout,*) ' ==================================='
465	ENDIF
466
467	ENDIF
468
469	!--------------------------------------------------------------------
470	! Allocate and initialize the increment arrays
471	!--------------------------------------------------------------------
472
473	IF ( ln_trainc ) THEN
474	ALLOCATE( t_bkginc(jpi,jpj,jpk) )
475	ALLOCATE( s_bkginc(jpi,jpj,jpk) )
476	t_bkginc(:,:,:) = 0.0
477	s_bkginc(:,:,:) = 0.0
478	ENDIF
479	IF ( ln_dyninc ) THEN
480	ALLOCATE( u_bkginc(jpi,jpj,jpk) )
481	ALLOCATE( v_bkginc(jpi,jpj,jpk) )
482	u_bkginc(:,:,:) = 0.0
483	v_bkginc(:,:,:) = 0.0
484	ENDIF
485	IF ( ln_sshinc ) THEN
486	ALLOCATE( ssh_bkginc(jpi,jpj) )
487	ssh_bkginc(:,:) = 0.0
488	ENDIF
489	IF ( ln_seaiceinc ) THEN
490	ALLOCATE( seaice_bkginc(jpi,jpj))
491	seaice_bkginc(:,:) = 0.0
492	ENDIF
493	#if defined key_asminc
494	ALLOCATE( ssh_iau(jpi,jpj) )
495	ssh_iau(:,:) = 0.0
496	#endif
497	IF ( ( ln_logchltotinc ).OR.( ln_logchlpftinc ) ) THEN
498	ALLOCATE( logchl_bkginc(jpi,jpj,nn_asmpfts))
499	logchl_bkginc(:,:,:) = 0.0
500	#if defined key_top
501	ALLOCATE( logchl_balinc(jpi,jpj,jpk,jptra) )
502	logchl_balinc(:,:,:,:) = 0.0
503	#endif
504	ENDIF
505	IF ( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ).OR.( ln_seaiceinc ) &
506	& .OR.( ln_logchltotinc ).OR.( ln_logchlpftinc ) ) THEN
507
508	!--------------------------------------------------------------------
509	! Read the increments from file
510	!--------------------------------------------------------------------
511
512	CALL iom_open( c_asminc, inum )
513
514	CALL iom_get( inum, 'time', zdate_inc )
515
516	CALL iom_get( inum, 'z_inc_dateb', z_inc_dateb )
517	CALL iom_get( inum, 'z_inc_datef', z_inc_datef )
518	z_inc_dateb = zdate_inc
519	z_inc_datef = zdate_inc
520
521	IF(lwp) THEN
522	WRITE(numout,*)
523	WRITE(numout,*) 'asm_inc_init : Assimilation increments valid ', &
524	& ' between dates ', NINT( z_inc_dateb ),' and ', &
525	& NINT( z_inc_datef )
526	WRITE(numout,*) '~~~~~~~~~~~~'
527	ENDIF
528
529	IF ( ( NINT( z_inc_dateb ) < ndastp ) &
530	& .OR.( NINT( z_inc_datef ) > iitend_date ) ) &
531	& CALL ctl_warn( ' Validity time of assimilation increments is ', &
532	& ' outside the assimilation interval' )
533
534	IF ( ( ln_asmdin ).AND.( NINT( zdate_inc ) /= iitdin_date ) ) &
535	& CALL ctl_warn( ' Validity time of assimilation increments does ', &
536	& ' not agree with Direct Initialization time' )
537
538	IF ( ln_trainc ) THEN
539
540	!Test if the increments file contains the surft variable.
541	isurfstat = iom_varid( inum, 'bckinsurft', ldstop = .FALSE. )
542	IF ( isurfstat == -1 ) THEN
543	lk_surft = .FALSE.
544	ELSE
545	lk_surft = .TRUE.
546	CALL ctl_warn( ' Applying 2D temperature increment to bottom of ML: ', &
547	& ' bckinsurft found in increments file.' )
548	ENDIF
549
550	IF (lk_surft) THEN
551
552	ALLOCATE(z_mld(jpi,jpj))
553	SELECT CASE(mld_choice)
554	CASE(1)
555	z_mld = hmld
556	CASE(2)
557	z_mld = hmlp
558	CASE(3)
559	#if defined key_karaml
560	IF ( ln_kara ) THEN
561	z_mld = hmld_kara
562	ELSE
563	CALL ctl_stop("Kara mixed layer not calculated as ln_kara=.false.")
564	ENDIF
565	#else
566	CALL ctl_stop("Kara mixed layer not defined in current version of NEMO") ! JW: Safety feature, should be removed
567	! once the Kara mixed layer is available
568	#endif
569	CASE(4)
570	z_mld = hmld_tref
571	END SELECT
572
573	ALLOCATE( t_bkginc_2d(jpi,jpj) )
574	CALL iom_get( inum, jpdom_autoglo, 'bckinsurft', t_bkginc_2d, 1)
575	#if defined key_bdy
576	DO jk = 1,jpkm1
577	WHERE( z_mld(:,:) > fsdepw(:,:,jk) )
578	t_bkginc(:,:,jk) = t_bkginc_2d(:,:) * 0.5 * &
579	& ( 1 + cos( (fsdept(:,:,jk)/z_mld(:,:) ) * rpi ) )
580
581	t_bkginc(:,:,jk) = t_bkginc(:,:,jk) * bdytmask(:,:)
582	ELSEWHERE
583	t_bkginc(:,:,jk) = 0.
584	ENDWHERE
585	ENDDO
586	#else
587	t_bkginc(:,:,:) = 0.
588	#endif
589	s_bkginc(:,:,:) = 0.
590
591	DEALLOCATE(z_mld, t_bkginc_2d)
592
593	ELSE
594
595	CALL iom_get( inum, jpdom_autoglo, 'bckint', t_bkginc, 1 )
596	CALL iom_get( inum, jpdom_autoglo, 'bckins', s_bkginc, 1 )
597	! Apply the masks
598	t_bkginc(:,:,:) = t_bkginc(:,:,:) * tmask(:,:,:)
599	s_bkginc(:,:,:) = s_bkginc(:,:,:) * tmask(:,:,:)
600	! Set missing increments to 0.0 rather than 1e+20
601	! to allow for differences in masks
602	WHERE( ABS( t_bkginc(:,:,:) ) > 1.0e+10 ) t_bkginc(:,:,:) = 0.0
603	WHERE( ABS( s_bkginc(:,:,:) ) > 1.0e+10 ) s_bkginc(:,:,:) = 0.0
604
605	ENDIF
606
607	ENDIF
608
609	IF ( ln_dyninc ) THEN
610	CALL iom_get( inum, jpdom_autoglo, 'bckinu', u_bkginc, 1 )
611	CALL iom_get( inum, jpdom_autoglo, 'bckinv', v_bkginc, 1 )
612	! Apply the masks
613	u_bkginc(:,:,:) = u_bkginc(:,:,:) * umask(:,:,:)
614	v_bkginc(:,:,:) = v_bkginc(:,:,:) * vmask(:,:,:)
615	! Set missing increments to 0.0 rather than 1e+20
616	! to allow for differences in masks
617	WHERE( ABS( u_bkginc(:,:,:) ) > 1.0e+10 ) u_bkginc(:,:,:) = 0.0
618	WHERE( ABS( v_bkginc(:,:,:) ) > 1.0e+10 ) v_bkginc(:,:,:) = 0.0
619	ENDIF
620
621	IF ( ln_sshinc ) THEN
622	CALL iom_get( inum, jpdom_autoglo, 'bckineta', ssh_bkginc, 1 )
623	! Apply the masks
624	ssh_bkginc(:,:) = ssh_bkginc(:,:) * tmask(:,:,1)
625	! Set missing increments to 0.0 rather than 1e+20
626	! to allow for differences in masks
627	WHERE( ABS( ssh_bkginc(:,:) ) > 1.0e+10 ) ssh_bkginc(:,:) = 0.0
628	ENDIF
629
630	IF ( ln_seaiceinc ) THEN
631	CALL iom_get( inum, jpdom_autoglo, 'bckinseaice', seaice_bkginc, 1 )
632	! Apply the masks
633	seaice_bkginc(:,:) = seaice_bkginc(:,:) * tmask(:,:,1)
634	! Set missing increments to 0.0 rather than 1e+20
635	! to allow for differences in masks
636	WHERE( ABS( seaice_bkginc(:,:) ) > 1.0e+10 ) seaice_bkginc(:,:) = 0.0
637	ENDIF
638
639	IF ( ln_logchltotinc ) THEN
640	CALL iom_get( inum, jpdom_autoglo, 'bckinlogchl', logchl_bkginc(:,:,1), 1 )
641	! Apply the masks
642	logchl_bkginc(:,:,1) = logchl_bkginc(:,:,1) * tmask(:,:,1)
643	! Set missing increments to 0.0 rather than 1e+20
644	! to allow for differences in masks
645	WHERE( ABS( logchl_bkginc(:,:,1) ) > 1.0e+10 ) logchl_bkginc(:,:,1) = 0.0
646	ENDIF
647
648	IF ( ln_logchlpftinc ) THEN
649	DO jt = 1, nn_asmpfts
650	WRITE(cl_pftstr,'(I2.2)') jt
651	CALL iom_get( inum, jpdom_autoglo, 'bckinlogchl'//cl_pftstr, logchl_bkginc(:,:,jt), 1 )
652	! Apply the masks
653	logchl_bkginc(:,:,jt) = logchl_bkginc(:,:,jt) * tmask(:,:,1)
654	! Set missing increments to 0.0 rather than 1e+20
655	! to allow for differences in masks
656	WHERE( ABS( logchl_bkginc(:,:,jt) ) > 1.0e+10 ) logchl_bkginc(:,:,jt) = 0.0
657	END DO
658	ENDIF
659
660	CALL iom_close( inum )
661
662	ENDIF
663
664	!-----------------------------------------------------------------------
665	! Apply divergence damping filter
666	!-----------------------------------------------------------------------
667
668	IF ( ln_dyninc .AND. nn_divdmp > 0 ) THEN
669
670	CALL wrk_alloc(jpi,jpj,hdiv)
671
672	DO jt = 1, nn_divdmp
673
674	DO jk = 1, jpkm1
675
676	hdiv(:,:) = 0._wp
677
678	DO jj = 2, jpjm1
679	DO ji = fs_2, fs_jpim1 ! vector opt.
680	hdiv(ji,jj) = &
681	( e2u(ji ,jj ) * fse3u(ji ,jj ,jk) * u_bkginc(ji ,jj ,jk) &
682	- e2u(ji-1,jj ) * fse3u(ji-1,jj ,jk) * u_bkginc(ji-1,jj ,jk) &
683	+ e1v(ji ,jj ) * fse3v(ji ,jj ,jk) * v_bkginc(ji ,jj ,jk) &
684	- e1v(ji ,jj-1) * fse3v(ji ,jj-1,jk) * v_bkginc(ji ,jj-1,jk) ) &
685	/ ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) )
686	END DO
687	END DO
688
689	CALL lbc_lnk( hdiv, 'T', 1. ) ! lateral boundary cond. (no sign change)
690
691	DO jj = 2, jpjm1
692	DO ji = fs_2, fs_jpim1 ! vector opt.
693	u_bkginc(ji,jj,jk) = u_bkginc(ji,jj,jk) + 0.2_wp * ( e1t(ji+1,jj)e2t(ji+1,jj) hdiv(ji+1,jj) &
694	- e1t(ji ,jj)e2t(ji ,jj) hdiv(ji ,jj) ) &
695	/ e1u(ji,jj) * umask(ji,jj,jk)
696	v_bkginc(ji,jj,jk) = v_bkginc(ji,jj,jk) + 0.2_wp * ( e1t(ji,jj+1)e2t(ji,jj+1) hdiv(ji,jj+1) &
697	- e1t(ji,jj )e2t(ji,jj ) hdiv(ji,jj ) ) &
698	/ e2v(ji,jj) * vmask(ji,jj,jk)
699	END DO
700	END DO
701
702	END DO
703
704	END DO
705
706	CALL wrk_dealloc(jpi,jpj,hdiv)
707
708	ENDIF
709
710
711
712	!-----------------------------------------------------------------------
713	! Allocate and initialize the background state arrays
714	!-----------------------------------------------------------------------
715
716	IF ( ln_asmdin ) THEN
717
718	ALLOCATE( t_bkg(jpi,jpj,jpk) )
719	ALLOCATE( s_bkg(jpi,jpj,jpk) )
720	ALLOCATE( u_bkg(jpi,jpj,jpk) )
721	ALLOCATE( v_bkg(jpi,jpj,jpk) )
722	ALLOCATE( ssh_bkg(jpi,jpj) )
723
724	t_bkg(:,:,:) = 0.0
725	s_bkg(:,:,:) = 0.0
726	u_bkg(:,:,:) = 0.0
727	v_bkg(:,:,:) = 0.0
728	ssh_bkg(:,:) = 0.0
729
730	!--------------------------------------------------------------------
731	! Read from file the background state at analysis time
732	!--------------------------------------------------------------------
733
734	CALL iom_open( c_asmdin, inum )
735
736	CALL iom_get( inum, 'rdastp', zdate_bkg )
737
738	IF(lwp) THEN
739	WRITE(numout,*)
740	WRITE(numout,*) 'asm_inc_init : Assimilation background state valid at : ', &
741	& NINT( zdate_bkg )
742	WRITE(numout,*) '~~~~~~~~~~~~'
743	ENDIF
744
745	IF ( NINT( zdate_bkg ) /= iitdin_date ) &
746	& CALL ctl_warn( ' Validity time of assimilation background state does', &
747	& ' not agree with Direct Initialization time' )
748
749	IF ( ln_trainc ) THEN
750	CALL iom_get( inum, jpdom_autoglo, 'tn', t_bkg )
751	CALL iom_get( inum, jpdom_autoglo, 'sn', s_bkg )
752	t_bkg(:,:,:) = t_bkg(:,:,:) * tmask(:,:,:)
753	s_bkg(:,:,:) = s_bkg(:,:,:) * tmask(:,:,:)
754	ENDIF
755
756	IF ( ln_dyninc ) THEN
757	CALL iom_get( inum, jpdom_autoglo, 'un', u_bkg )
758	CALL iom_get( inum, jpdom_autoglo, 'vn', v_bkg )
759	u_bkg(:,:,:) = u_bkg(:,:,:) * umask(:,:,:)
760	v_bkg(:,:,:) = v_bkg(:,:,:) * vmask(:,:,:)
761	ENDIF
762
763	IF ( ln_sshinc ) THEN
764	CALL iom_get( inum, jpdom_autoglo, 'sshn', ssh_bkg )
765	ssh_bkg(:,:) = ssh_bkg(:,:) * tmask(:,:,1)
766	ENDIF
767
768	CALL iom_close( inum )
769
770	ENDIF
771	!
772	END SUBROUTINE asm_inc_init
773
774
775	SUBROUTINE calc_date( kit000, kt, kdate0, kdate )
776	!!----------------------------------------------------------------------
777	!! * ROUTINE calc_date *
778	!!
779	!! ** Purpose : Compute the calendar date YYYYMMDD at a given time step.
780	!!
781	!! ** Method : Compute the calendar date YYYYMMDD at a given time step.
782	!!
783	!! ** Action :
784	!!----------------------------------------------------------------------
785	INTEGER, INTENT(IN) :: kit000 ! Initial time step
786	INTEGER, INTENT(IN) :: kt ! Current time step referenced to kit000
787	INTEGER, INTENT(IN) :: kdate0 ! Initial date
788	INTEGER, INTENT(OUT) :: kdate ! Current date reference to kdate0
789	!
790	INTEGER :: iyea0 ! Initial year
791	INTEGER :: imon0 ! Initial month
792	INTEGER :: iday0 ! Initial day
793	INTEGER :: iyea ! Current year
794	INTEGER :: imon ! Current month
795	INTEGER :: iday ! Current day
796	INTEGER :: idaystp ! Number of days between initial and current date
797	INTEGER :: idaycnt ! Day counter
798
799	INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year
800
801	!-----------------------------------------------------------------------
802	! Compute the calendar date YYYYMMDD
803	!-----------------------------------------------------------------------
804
805	! Initial date
806	iyea0 = kdate0 / 10000
807	imon0 = ( kdate0 - ( iyea0 * 10000 ) ) / 100
808	iday0 = kdate0 - ( iyea0 * 10000 ) - ( imon0 * 100 )
809
810	! Check that kt >= kit000 - 1
811	IF ( kt < kit000 - 1 ) CALL ctl_stop( ' kt must be >= kit000 - 1')
812
813	! If kt = kit000 - 1 then set the date to the restart date
814	IF ( kt == kit000 - 1 ) THEN
815
816	kdate = ndastp
817	RETURN
818
819	ENDIF
820
821	! Compute the number of days from the initial date
822	idaystp = INT( REAL( kt - kit000 ) * rdt / 86400. )
823
824	iday = iday0
825	imon = imon0
826	iyea = iyea0
827	idaycnt = 0
828
829	CALL calc_month_len( iyea, imonth_len )
830
831	DO WHILE ( idaycnt < idaystp )
832	iday = iday + 1
833	IF ( iday > imonth_len(imon) ) THEN
834	iday = 1
835	imon = imon + 1
836	ENDIF
837	IF ( imon > 12 ) THEN
838	imon = 1
839	iyea = iyea + 1
840	CALL calc_month_len( iyea, imonth_len ) ! update month lengths
841	ENDIF
842	idaycnt = idaycnt + 1
843	END DO
844	!
845	kdate = iyea * 10000 + imon * 100 + iday
846	!
847	END SUBROUTINE
848
849
850	SUBROUTINE calc_month_len( iyear, imonth_len )
851	!!----------------------------------------------------------------------
852	!! * ROUTINE calc_month_len *
853	!!
854	!! ** Purpose : Compute the number of days in a months given a year.
855	!!
856	!! ** Method :
857	!!----------------------------------------------------------------------
858	INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year
859	INTEGER :: iyear !: year
860	!!----------------------------------------------------------------------
861	!
862	! length of the month of the current year (from nleapy, read in namelist)
863	IF ( nleapy < 2 ) THEN
864	imonth_len(:) = (/ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 /)
865	IF ( nleapy == 1 ) THEN ! we are using calendar with leap years
866	IF ( MOD(iyear, 4) == 0 .AND. ( MOD(iyear, 400) == 0 .OR. MOD(iyear, 100) /= 0 ) ) THEN
867	imonth_len(2) = 29
868	ENDIF
869	ENDIF
870	ELSE
871	imonth_len(:) = nleapy ! all months with nleapy days per year
872	ENDIF
873	!
874	END SUBROUTINE
875
876
877	SUBROUTINE tra_asm_inc( kt )
878	!!----------------------------------------------------------------------
879	!! * ROUTINE tra_asm_inc *
880	!!
881	!! ** Purpose : Apply the tracer (T and S) assimilation increments
882	!!
883	!! ** Method : Direct initialization or Incremental Analysis Updating
884	!!
885	!! ** Action :
886	!!----------------------------------------------------------------------
887	INTEGER, INTENT(IN) :: kt ! Current time step
888	!
889	INTEGER :: ji,jj,jk
890	INTEGER :: it
891	REAL(wp) :: zincwgt ! IAU weight for current time step
892	REAL (wp), DIMENSION(jpi,jpj,jpk) :: fzptnz ! 3d freezing point values
893	!!----------------------------------------------------------------------
894
895	! freezing point calculation taken from oc_fz_pt (but calculated for all depths)
896	! used to prevent the applied increments taking the temperature below the local freezing point
897
898	DO jk = 1, jpkm1
899	fzptnz(:,:,jk) = eos_fzp( tsn(:,:,jk,jp_sal), fsdept(:,:,jk) )
900	END DO
901
902	IF ( ln_asmiau ) THEN
903
904	!--------------------------------------------------------------------
905	! Incremental Analysis Updating
906	!--------------------------------------------------------------------
907
908	IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN
909
910	it = kt - nit000 + 1
911	zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step
912
913	IF(lwp) THEN
914	WRITE(numout,*)
915	WRITE(numout,*) 'tra_asm_inc : Tracer IAU at time step = ', kt,' with IAU weight = ', wgtiau(it)
916	WRITE(numout,*) '~~~~~~~~~~~~'
917	ENDIF
918
919	! Update the tracer tendencies
920	DO jk = 1, jpkm1
921	IF (ln_temnofreeze) THEN
922	! Do not apply negative increments if the temperature will fall below freezing
923	WHERE(t_bkginc(:,:,jk) > 0.0_wp .OR. &
924	& tsn(:,:,jk,jp_tem) + tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * wgtiau(it) > fzptnz(:,:,jk) )
925	tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt
926	END WHERE
927	ELSE
928	tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt
929	ENDIF
930	IF (ln_salfix) THEN
931	! Do not apply negative increments if the salinity will fall below a specified
932	! minimum value salfixmin
933	WHERE(s_bkginc(:,:,jk) > 0.0_wp .OR. &
934	& tsn(:,:,jk,jp_sal) + tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * wgtiau(it) > salfixmin )
935	tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt
936	END WHERE
937	ELSE
938	tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt
939	ENDIF
940	END DO
941
942	ENDIF
943
944	IF ( kt == nitiaufin_r + 1 ) THEN ! For bias crcn to work
945	DEALLOCATE( t_bkginc )
946	DEALLOCATE( s_bkginc )
947	ENDIF
948
949
950	ELSEIF ( ln_asmdin ) THEN
951
952	!--------------------------------------------------------------------
953	! Direct Initialization
954	!--------------------------------------------------------------------
955
956	IF ( kt == nitdin_r ) THEN
957
958	neuler = 0 ! Force Euler forward step
959
960	! Initialize the now fields with the background + increment
961	IF (ln_temnofreeze) THEN
962	! Do not apply negative increments if the temperature will fall below freezing
963	WHERE( t_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_tem) + t_bkginc(:,:,:) > fzptnz(:,:,:) )
964	tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:)
965	END WHERE
966	ELSE
967	tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:)
968	ENDIF
969	IF (ln_salfix) THEN
970	! Do not apply negative increments if the salinity will fall below a specified
971	! minimum value salfixmin
972	WHERE( s_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_sal) + s_bkginc(:,:,:) > salfixmin )
973	tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:)
974	END WHERE
975	ELSE
976	tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:)
977	ENDIF
978
979	tsb(:,:,:,:) = tsn(:,:,:,:) ! Update before fields
980
981	CALL eos( tsb, rhd, rhop, gdept_0(:,:,:) ) ! Before potential and in situ densities
982	!!gm fabien
983	! CALL eos( tsb, rhd, rhop ) ! Before potential and in situ densities
984	!!gm
985
986
987	IF( ln_zps .AND. .NOT. lk_c1d .AND. .NOT. ln_isfcav) &
988	& CALL zps_hde ( kt, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient
989	& rhd, gru , grv ) ! of t, s, rd at the last ocean level
990	IF( ln_zps .AND. .NOT. lk_c1d .AND. ln_isfcav) &
991	& CALL zps_hde_isf( nit000, jpts, tsb, gtsu, gtsv, & ! Partial steps for top cell (ISF)
992	& rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , &
993	& gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level
994
995	#if defined key_zdfkpp
996	CALL eos( tsn, rhd, fsdept_n(:,:,:) ) ! Compute rhd
997	!!gm fabien CALL eos( tsn, rhd ) ! Compute rhd
998	#endif
999
1000	DEALLOCATE( t_bkginc )
1001	DEALLOCATE( s_bkginc )
1002	DEALLOCATE( t_bkg )
1003	DEALLOCATE( s_bkg )
1004	ENDIF
1005	!
1006	ENDIF
1007	! Perhaps the following call should be in step
1008	IF ( ln_seaiceinc ) CALL seaice_asm_inc ( kt ) ! apply sea ice concentration increment
1009	!
1010	END SUBROUTINE tra_asm_inc
1011
1012
1013	SUBROUTINE dyn_asm_inc( kt )
1014	!!----------------------------------------------------------------------
1015	!! * ROUTINE dyn_asm_inc *
1016	!!
1017	!! ** Purpose : Apply the dynamics (u and v) assimilation increments.
1018	!!
1019	!! ** Method : Direct initialization or Incremental Analysis Updating.
1020	!!
1021	!! ** Action :
1022	!!----------------------------------------------------------------------
1023	INTEGER, INTENT(IN) :: kt ! Current time step
1024	!
1025	INTEGER :: jk
1026	INTEGER :: it
1027	REAL(wp) :: zincwgt ! IAU weight for current time step
1028	!!----------------------------------------------------------------------
1029
1030	IF ( ln_asmiau ) THEN
1031
1032	!--------------------------------------------------------------------
1033	! Incremental Analysis Updating
1034	!--------------------------------------------------------------------
1035
1036	IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN
1037
1038	it = kt - nit000 + 1
1039	zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step
1040
1041	IF(lwp) THEN
1042	WRITE(numout,*)
1043	WRITE(numout,*) 'dyn_asm_inc : Dynamics IAU at time step = ', &
1044	& kt,' with IAU weight = ', wgtiau(it)
1045	WRITE(numout,*) '~~~~~~~~~~~~'
1046	ENDIF
1047
1048	! Update the dynamic tendencies
1049	DO jk = 1, jpkm1
1050	ua(:,:,jk) = ua(:,:,jk) + u_bkginc(:,:,jk) * zincwgt
1051	va(:,:,jk) = va(:,:,jk) + v_bkginc(:,:,jk) * zincwgt
1052	END DO
1053
1054	IF ( kt == nitiaufin_r ) THEN
1055	DEALLOCATE( u_bkginc )
1056	DEALLOCATE( v_bkginc )
1057	ENDIF
1058
1059	ENDIF
1060
1061	ELSEIF ( ln_asmdin ) THEN
1062
1063	!--------------------------------------------------------------------
1064	! Direct Initialization
1065	!--------------------------------------------------------------------
1066
1067	IF ( kt == nitdin_r ) THEN
1068
1069	neuler = 0 ! Force Euler forward step
1070
1071	! Initialize the now fields with the background + increment
1072	un(:,:,:) = u_bkg(:,:,:) + u_bkginc(:,:,:)
1073	vn(:,:,:) = v_bkg(:,:,:) + v_bkginc(:,:,:)
1074
1075	ub(:,:,:) = un(:,:,:) ! Update before fields
1076	vb(:,:,:) = vn(:,:,:)
1077
1078	DEALLOCATE( u_bkg )
1079	DEALLOCATE( v_bkg )
1080	DEALLOCATE( u_bkginc )
1081	DEALLOCATE( v_bkginc )
1082	ENDIF
1083	!
1084	ENDIF
1085	!
1086	END SUBROUTINE dyn_asm_inc
1087
1088
1089	SUBROUTINE ssh_asm_inc( kt )
1090	!!----------------------------------------------------------------------
1091	!! * ROUTINE ssh_asm_inc *
1092	!!
1093	!! ** Purpose : Apply the sea surface height assimilation increment.
1094	!!
1095	!! ** Method : Direct initialization or Incremental Analysis Updating.
1096	!!
1097	!! ** Action :
1098	!!----------------------------------------------------------------------
1099	INTEGER, INTENT(IN) :: kt ! Current time step
1100	!
1101	INTEGER :: it
1102	INTEGER :: jk
1103	REAL(wp) :: zincwgt ! IAU weight for current time step
1104	!!----------------------------------------------------------------------
1105
1106	IF ( ln_asmiau ) THEN
1107
1108	!--------------------------------------------------------------------
1109	! Incremental Analysis Updating
1110	!--------------------------------------------------------------------
1111
1112	IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN
1113
1114	it = kt - nit000 + 1
1115	zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step
1116
1117	IF(lwp) THEN
1118	WRITE(numout,*)
1119	WRITE(numout,*) 'ssh_asm_inc : SSH IAU at time step = ', &
1120	& kt,' with IAU weight = ', wgtiau(it)
1121	WRITE(numout,*) '~~~~~~~~~~~~'
1122	ENDIF
1123
1124	! Save the tendency associated with the IAU weighted SSH increment
1125	! (applied in dynspg.*)
1126	#if defined key_asminc
1127	ssh_iau(:,:) = ssh_bkginc(:,:) * zincwgt
1128	#endif
1129	IF ( kt == nitiaufin_r ) THEN
1130	DEALLOCATE( ssh_bkginc )
1131	ENDIF
1132
1133	ENDIF
1134
1135	ELSEIF ( ln_asmdin ) THEN
1136
1137	!--------------------------------------------------------------------
1138	! Direct Initialization
1139	!--------------------------------------------------------------------
1140
1141	IF ( kt == nitdin_r ) THEN
1142
1143	neuler = 0 ! Force Euler forward step
1144
1145	! Initialize the now fields the background + increment
1146	sshn(:,:) = ssh_bkg(:,:) + ssh_bkginc(:,:)
1147
1148	! Update before fields
1149	sshb(:,:) = sshn(:,:)
1150
1151	IF( lk_vvl ) THEN
1152	DO jk = 1, jpk
1153	fse3t_b(:,:,jk) = fse3t_n(:,:,jk)
1154	END DO
1155	ENDIF
1156
1157	DEALLOCATE( ssh_bkg )
1158	DEALLOCATE( ssh_bkginc )
1159
1160	ENDIF
1161	!
1162	ENDIF
1163	!
1164	END SUBROUTINE ssh_asm_inc
1165
1166
1167	SUBROUTINE seaice_asm_inc( kt, kindic )
1168	!!----------------------------------------------------------------------
1169	!! * ROUTINE seaice_asm_inc *
1170	!!
1171	!! ** Purpose : Apply the sea ice assimilation increment.
1172	!!
1173	!! ** Method : Direct initialization or Incremental Analysis Updating.
1174	!!
1175	!! ** Action :
1176	!!
1177	!!----------------------------------------------------------------------
1178	IMPLICIT NONE
1179	!
1180	INTEGER, INTENT(in) :: kt ! Current time step
1181	INTEGER, INTENT(in), OPTIONAL :: kindic ! flag for disabling the deallocation
1182	!
1183	INTEGER :: it
1184	REAL(wp) :: zincwgt ! IAU weight for current time step
1185	#if defined key_lim2
1186	REAL(wp), DIMENSION(jpi,jpj) :: zofrld, zohicif, zseaicendg, zhicifinc ! LIM
1187	REAL(wp) :: zhicifmin = 0.5_wp ! ice minimum depth in metres
1188	#endif
1189	!!----------------------------------------------------------------------
1190
1191	IF ( ln_asmiau ) THEN
1192
1193	!--------------------------------------------------------------------
1194	! Incremental Analysis Updating
1195	!--------------------------------------------------------------------
1196
1197	IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN
1198
1199	it = kt - nit000 + 1
1200	zincwgt = wgtiau(it) ! IAU weight for the current time step
1201	! note this is not a tendency so should not be divided by rdt (as with the tracer and other increments)
1202
1203	IF(lwp) THEN
1204	WRITE(numout,*)
1205	WRITE(numout,*) 'seaice_asm_inc : sea ice conc IAU at time step = ', &
1206	& kt,' with IAU weight = ', wgtiau(it)
1207	WRITE(numout,*) '~~~~~~~~~~~~'
1208	ENDIF
1209
1210	! Sea-ice : LIM-3 case (to add)
1211
1212	#if defined key_lim2
1213	! Sea-ice : LIM-2 case
1214	zofrld (:,:) = frld(:,:)
1215	zohicif(:,:) = hicif(:,:)
1216	!
1217	frld = MIN( MAX( frld (:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp)
1218	pfrld = MIN( MAX( pfrld(:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp)
1219	fr_i(:,:) = 1.0_wp - frld(:,:) ! adjust ice fraction
1220	!
1221	zseaicendg(:,:) = zofrld(:,:) - frld(:,:) ! find out actual sea ice nudge applied
1222	!
1223	! Nudge sea ice depth to bring it up to a required minimum depth
1224	WHERE( zseaicendg(:,:) > 0.0_wp .AND. hicif(:,:) < zhicifmin )
1225	zhicifinc(:,:) = (zhicifmin - hicif(:,:)) * zincwgt
1226	ELSEWHERE
1227	zhicifinc(:,:) = 0.0_wp
1228	END WHERE
1229	!
1230	! nudge ice depth
1231	hicif (:,:) = hicif (:,:) + zhicifinc(:,:)
1232	phicif(:,:) = phicif(:,:) + zhicifinc(:,:)
1233	!
1234	! seaice salinity balancing (to add)
1235	#endif
1236
1237	#if defined key_cice && defined key_asminc
1238	! Sea-ice : CICE case. Pass ice increment tendency into CICE
1239	ndaice_da(:,:) = seaice_bkginc(:,:) * zincwgt / rdt
1240	#endif
1241
1242	IF ( kt == nitiaufin_r ) THEN
1243	DEALLOCATE( seaice_bkginc )
1244	ENDIF
1245
1246	ELSE
1247
1248	#if defined key_cice && defined key_asminc
1249	! Sea-ice : CICE case. Zero ice increment tendency into CICE
1250	ndaice_da(:,:) = 0.0_wp
1251	#endif
1252
1253	ENDIF
1254
1255	ELSEIF ( ln_asmdin ) THEN
1256
1257	!--------------------------------------------------------------------
1258	! Direct Initialization
1259	!--------------------------------------------------------------------
1260
1261	IF ( kt == nitdin_r ) THEN
1262
1263	neuler = 0 ! Force Euler forward step
1264
1265	! Sea-ice : LIM-3 case (to add)
1266
1267	#if defined key_lim2
1268	! Sea-ice : LIM-2 case.
1269	zofrld(:,:)=frld(:,:)
1270	zohicif(:,:)=hicif(:,:)
1271	!
1272	! Initialize the now fields the background + increment
1273	frld (:,:) = MIN( MAX( frld(:,:) - seaice_bkginc(:,:), 0.0_wp), 1.0_wp)
1274	pfrld(:,:) = frld(:,:)
1275	fr_i (:,:) = 1.0_wp - frld(:,:) ! adjust ice fraction
1276	zseaicendg(:,:) = zofrld(:,:) - frld(:,:) ! find out actual sea ice nudge applied
1277	!
1278	! Nudge sea ice depth to bring it up to a required minimum depth
1279	WHERE( zseaicendg(:,:) > 0.0_wp .AND. hicif(:,:) < zhicifmin )
1280	zhicifinc(:,:) = (zhicifmin - hicif(:,:)) * zincwgt
1281	ELSEWHERE
1282	zhicifinc(:,:) = 0.0_wp
1283	END WHERE
1284	!
1285	! nudge ice depth
1286	hicif (:,:) = hicif (:,:) + zhicifinc(:,:)
1287	phicif(:,:) = phicif(:,:)
1288	!
1289	! seaice salinity balancing (to add)
1290	#endif
1291
1292	#if defined key_cice && defined key_asminc
1293	! Sea-ice : CICE case. Pass ice increment tendency into CICE
1294	ndaice_da(:,:) = seaice_bkginc(:,:) / rdt
1295	#endif
1296	IF ( .NOT. PRESENT(kindic) ) THEN
1297	DEALLOCATE( seaice_bkginc )
1298	END IF
1299
1300	ELSE
1301
1302	#if defined key_cice && defined key_asminc
1303	! Sea-ice : CICE case. Zero ice increment tendency into CICE
1304	ndaice_da(:,:) = 0.0_wp
1305	#endif
1306
1307	ENDIF
1308
1309	!#if defined defined key_lim2 \|\| defined key_cice
1310	!
1311	! IF (ln_seaicebal ) THEN
1312	! !! balancing salinity increments
1313	! !! simple case from limflx.F90 (doesn't include a mass flux)
1314	! !! assumption is that as ice concentration is reduced or increased
1315	! !! the snow and ice depths remain constant
1316	! !! note that snow is being created where ice concentration is being increased
1317	! !! - could be more sophisticated and
1318	! !! not do this (but would need to alter h_snow)
1319	!
1320	! usave(:,:,:)=sb(:,:,:) ! use array as a temporary store
1321	!
1322	! DO jj = 1, jpj
1323	! DO ji = 1, jpi
1324	! ! calculate change in ice and snow mass per unit area
1325	! ! positive values imply adding salt to the ocean (results from ice formation)
1326	! ! fwf : ice formation and melting
1327	!
1328	! zfons = ( -nfresh_da(ji,jj)soce + nfsalt_da(ji,jj) )rdt
1329	!
1330	! ! change salinity down to mixed layer depth
1331	! mld=hmld_kara(ji,jj)
1332	!
1333	! ! prevent small mld
1334	! ! less than 10m can cause salinity instability
1335	! IF (mld < 10) mld=10
1336	!
1337	! ! set to bottom of a level
1338	! DO jk = jpk-1, 2, -1
1339	! IF ((mld > gdepw(ji,jj,jk)) .and. (mld < gdepw(ji,jj,jk+1))) THEN
1340	! mld=gdepw(ji,jj,jk+1)
1341	! jkmax=jk
1342	! ENDIF
1343	! ENDDO
1344	!
1345	! ! avoid applying salinity balancing in shallow water or on land
1346	! !
1347	!
1348	! ! dsal_ocn (psu kg m^-2) / (kg m^-3 * m)
1349	!
1350	! dsal_ocn=0.0_wp
1351	! sal_thresh=5.0_wp ! minimum salinity threshold for salinity balancing
1352	!
1353	! if (tmask(ji,jj,1) > 0 .AND. tmask(ji,jj,jkmax) > 0 ) &
1354	! dsal_ocn = zfons / (rhop(ji,jj,1) * mld)
1355	!
1356	! ! put increments in for levels in the mixed layer
1357	! ! but prevent salinity below a threshold value
1358	!
1359	! DO jk = 1, jkmax
1360	!
1361	! IF (dsal_ocn > 0.0_wp .or. sb(ji,jj,jk)+dsal_ocn > sal_thresh) THEN
1362	! sb(ji,jj,jk) = sb(ji,jj,jk) + dsal_ocn
1363	! sn(ji,jj,jk) = sn(ji,jj,jk) + dsal_ocn
1364	! ENDIF
1365	!
1366	! ENDDO
1367	!
1368	! ! ! salt exchanges at the ice/ocean interface
1369	! ! zpmess = zfons / rdt_ice ! rdt_ice is ice timestep
1370	! !
1371	! !! Adjust fsalt. A +ve fsalt means adding salt to ocean
1372	! !! fsalt(ji,jj) = fsalt(ji,jj) + zpmess ! adjust fsalt
1373	! !!
1374	! !! emps(ji,jj) = emps(ji,jj) + zpmess ! or adjust emps (see icestp1d)
1375	! !! ! E-P (kg m-2 s-2)
1376	! ! emp(ji,jj) = emp(ji,jj) + zpmess ! E-P (kg m-2 s-2)
1377	! ENDDO !ji
1378	! ENDDO !jj!
1379	!
1380	! ENDIF !ln_seaicebal
1381	!
1382	!#endif
1383
1384	ENDIF
1385
1386	END SUBROUTINE seaice_asm_inc
1387
1388	SUBROUTINE logchl_asm_inc( kt )
1389	!!----------------------------------------------------------------------
1390	!! * ROUTINE logchl_asm_inc *
1391	!!
1392	!! ** Purpose : Apply the chlorophyll assimilation increments.
1393	!!
1394	!! ** Method : Calculate increments to state variables using nitrogen
1395	!! balancing.
1396	!! Direct initialization or Incremental Analysis Updating.
1397	!!
1398	!! ** Action :
1399	!!----------------------------------------------------------------------
1400	INTEGER, INTENT(IN) :: kt ! Current time step
1401	!
1402	INTEGER :: jk ! Loop counter
1403	INTEGER :: it ! Index
1404	REAL(wp) :: zincwgt ! IAU weight for current time step
1405	REAL(wp) :: zincper ! IAU interval in seconds
1406	!!----------------------------------------------------------------------
1407
1408	IF ( kt <= nit000 ) THEN
1409
1410	zincper = (nitiaufin_r - nitiaustr_r + 1) * rdt
1411
1412	#if defined key_fabm
1413	CALL asm_logchl_bal_ersem( ln_logchlpftinc, nn_asmpfts, mld_choice_bgc, &
1414	& rn_maxchlinc, logchl_bkginc, logchl_balinc )
1415	#elif defined key_medusa && defined key_foam_medusa
1416	!CALL asm_logchl_bal_medusa()
1417	CALL ctl_stop( 'Attempting to assimilate logchl into MEDUSA, ', &
1418	& 'but not fully implemented yet' )
1419	#elif defined key_hadocc
1420	!CALL asm_logchl_bal_hadocc()
1421	CALL ctl_stop( 'Attempting to assimilate logchl into HadOCC, ', &
1422	& 'but not fully implemented yet' )
1423	#else
1424	CALL ctl_stop( 'Attempting to assimilate logchl, ', &
1425	& 'but not defined a biogeochemical model' )
1426	#endif
1427
1428	ENDIF
1429
1430	IF ( ln_asmiau ) THEN
1431
1432	!--------------------------------------------------------------------
1433	! Incremental Analysis Updating
1434	!--------------------------------------------------------------------
1435
1436	IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN
1437
1438	it = kt - nit000 + 1
1439	zincwgt = wgtiau(it) ! IAU weight for the current time step
1440	! note this is not a tendency so should not be divided by rdt
1441
1442	IF(lwp) THEN
1443	WRITE(numout,*)
1444	WRITE(numout,*) 'logchl_asm_inc : logchl IAU at time step = ', &
1445	& kt,' with IAU weight = ', wgtiau(it)
1446	WRITE(numout,*) '~~~~~~~~~~~~'
1447	ENDIF
1448
1449	! Update the biogeochemical variables
1450	! Add directly to trn and trb, rather than to tra, as not a tendency
1451	#if defined key_fabm
1452	DO jk = 1, jpkm1
1453	trn(:,:,jk,jp_fabm0:jp_fabm1) = trn(:,:,jk,jp_fabm0:jp_fabm1) + &
1454	& logchl_balinc(:,:,jk,jp_fabm0:jp_fabm1) * zincwgt
1455	trb(:,:,jk,jp_fabm0:jp_fabm1) = trb(:,:,jk,jp_fabm0:jp_fabm1) + &
1456	& logchl_balinc(:,:,jk,jp_fabm0:jp_fabm1) * zincwgt
1457	END DO
1458	#elif defined key_medusa && defined key_foam_medusa
1459	DO jk = 1, jpkm1
1460	trn(:,:,jk,jp_msa0:jp_msa1) = trn(:,:,jk,jp_msa0:jp_msa1) + &
1461	& logchl_balinc(:,:,jk,jp_msa0:jp_msa1) * zincwgt
1462	trb(:,:,jk,jp_msa0:jp_msa1) = trb(:,:,jk,jp_msa0:jp_msa1) + &
1463	& logchl_balinc(:,:,jk,jp_msa0:jp_msa1) * zincwgt
1464	END DO
1465	#elif defined key_hadocc
1466	DO jk = 1, jpkm1
1467	trn(:,:,jk,jp_had0:jp_had1) = trn(:,:,jk,jp_had0:jp_had1) + &
1468	& logchl_balinc(:,:,jk,jp_had0:jp_had1) * zincwgt
1469	trb(:,:,jk,jp_had0:jp_had1) = trb(:,:,jk,jp_had0:jp_had1) + &
1470	& logchl_balinc(:,:,jk,jp_had0:jp_had1) * zincwgt
1471	END DO
1472	#endif
1473
1474	! Do not deallocate arrays - needed by asm_bal_wri
1475	! which is called at end of model run
1476
1477	ENDIF
1478
1479	ELSEIF ( ln_asmdin ) THEN
1480
1481	!--------------------------------------------------------------------
1482	! Direct Initialization
1483	!--------------------------------------------------------------------
1484
1485	IF ( kt == nitdin_r ) THEN
1486
1487	neuler = 0 ! Force Euler forward step
1488
1489	#if defined key_fabm
1490	! Initialize the now fields with the background + increment
1491	! Background currently is what the model is initialised with
1492	CALL ctl_warn( ' Doing direct initialisation of ERSEM with chlorophyll assimilation', &
1493	& ' Background state is taken from model rather than background file' )
1494	trn(:,:,:,jp_fabm0:jp_fabm1) = trn(:,:,:,jp_fabm0:jp_fabm1) + &
1495	& logchl_balinc(:,:,:,jp_fabm0:jp_fabm1)
1496	trb(:,:,:,jp_fabm0:jp_fabm1) = trn(:,:,:,jp_fabm0:jp_fabm1)
1497	#elif defined key_medusa && defined key_foam_medusa
1498	! Initialize the now fields with the background + increment
1499	! Background currently is what the model is initialised with
1500	CALL ctl_warn( ' Doing direct initialisation of MEDUSA with chlorophyll assimilation', &
1501	& ' Background state is taken from model rather than background file' )
1502	trn(:,:,:,jp_msa0:jp_msa1) = trn(:,:,:,jp_msa0:jp_msa1) + &
1503	& logchl_balinc(:,:,:,jp_msa0:jp_msa1)
1504	trb(:,:,:,jp_msa0:jp_msa1) = trn(:,:,:,jp_msa0:jp_msa1)
1505	#elif defined key_hadocc
1506	! Initialize the now fields with the background + increment
1507	! Background currently is what the model is initialised with
1508	CALL ctl_warn( ' Doing direct initialisation of HadOCC with chlorophyll assimilation', &
1509	& ' Background state is taken from model rather than background file' )
1510	trn(:,:,:,jp_had0:jp_had1) = trn(:,:,:,jp_had0:jp_had1) + &
1511	& logchl_balinc(:,:,:,jp_had0:jp_had1)
1512	trb(:,:,:,jp_had0:jp_had1) = trn(:,:,:,jp_had0:jp_had1)
1513	#endif
1514
1515	! Do not deallocate arrays - needed by asm_bal_wri
1516	! which is called at end of model run
1517	ENDIF
1518	!
1519	ENDIF
1520	!
1521	END SUBROUTINE logchl_asm_inc
1522
1523	!!======================================================================
1524	END MODULE asminc

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

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

Context Navigation

source: branches/UKMO/dev_r5518_v3.6_asm_nemovar_community/NEMOGCM/NEMO/OPA_SRC/ASM/asminc.F90 @ 7803

Download in other formats: