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sbcrnf.F90 in branches/2015/dev_r5204_CNRS_PISCES_dcy/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

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source: branches/2015/dev_r5204_CNRS_PISCES_dcy/NEMOGCM/NEMO/OPA_SRC/SBC/sbcrnf.F90 @ 5226

Last change on this file since 5226 was 5226, checked in by cetlod, 10 years ago
NEMOGCM_dev_r5204_CNRS_PISCES_dcy : minor bugs correction
Property svn:keywords set to `Id`
File size: 26.8 KB

Line
1	MODULE sbcrnf
2	!!======================================================================
3	!! * MODULE sbcrnf *
4	!! Ocean forcing: river runoff
5	!!=====================================================================
6	!! History : OPA ! 2000-11 (R. Hordoir, E. Durand) NetCDF FORMAT
7	!! NEMO 1.0 ! 2002-09 (G. Madec) F90: Free form and module
8	!! 3.0 ! 2006-07 (G. Madec) Surface module
9	!! 3.2 ! 2009-04 (B. Lemaire) Introduce iom_put
10	!! 3.3 ! 2010-10 (R. Furner, G. Madec) runoff distributed over ocean levels
11	!!----------------------------------------------------------------------
12
13	!!----------------------------------------------------------------------
14	!! sbc_rnf : monthly runoffs read in a NetCDF file
15	!! sbc_rnf_init : runoffs initialisation
16	!! rnf_mouth : set river mouth mask
17	!!----------------------------------------------------------------------
18	USE dom_oce ! ocean space and time domain
19	USE phycst ! physical constants
20	USE sbc_oce ! surface boundary condition variables
21	USE sbcisf ! PM we could remove it I think
22	USE closea ! closed seas
23	USE fldread ! read input field at current time step
24	USE in_out_manager ! I/O manager
25	USE iom ! I/O module
26	USE lib_mpp ! MPP library
27	USE eosbn2
28	USE wrk_nemo ! Memory allocation
29
30	IMPLICIT NONE
31	PRIVATE
32
33	PUBLIC sbc_rnf ! routine call in sbcmod module
34	PUBLIC sbc_rnf_div ! routine called in sshwzv module
35	PUBLIC sbc_rnf_alloc ! routine call in sbcmod module
36	PUBLIC sbc_rnf_init ! (PUBLIC for TAM)
37	! !!* namsbc_rnf namelist *
38	CHARACTER(len=100), PUBLIC :: cn_dir !: Root directory for location of ssr files
39	LOGICAL , PUBLIC :: ln_rnf_depth !: depth river runoffs attribute specified in a file
40	LOGICAL , PUBLIC :: ln_rnf_tem !: temperature river runoffs attribute specified in a file
41	LOGICAL , PUBLIC :: ln_rnf_sal !: salinity river runoffs attribute specified in a file
42	LOGICAL , PUBLIC :: ln_rnf_emp !: runoffs into a file to be read or already into precipitation
43	TYPE(FLD_N) , PUBLIC :: sn_rnf !: information about the runoff file to be read
44	TYPE(FLD_N) , PUBLIC :: sn_cnf !: information about the runoff mouth file to be read
45	TYPE(FLD_N) :: sn_s_rnf !: information about the salinities of runoff file to be read
46	TYPE(FLD_N) :: sn_t_rnf !: information about the temperatures of runoff file to be read
47	TYPE(FLD_N) :: sn_dep_rnf !: information about the depth which river inflow affects
48	LOGICAL , PUBLIC :: ln_rnf_mouth !: specific treatment in mouths vicinity
49	REAL(wp) , PUBLIC :: rn_hrnf !: runoffs, depth over which enhanced vertical mixing is used
50	REAL(wp) , PUBLIC :: rn_avt_rnf !: runoffs, value of the additional vertical mixing coef. [m2/s]
51	REAL(wp) , PUBLIC :: rn_rfact !: multiplicative factor for runoff
52
53	INTEGER , PUBLIC :: nkrnf = 0 !: nb of levels over which Kz is increased at river mouths
54	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rnfmsk !: river mouth mask (hori.)
55	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:) :: rnfmsk_z !: river mouth mask (vert.)
56	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: h_rnf !: depth of runoff in m
57	INTEGER, PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: nk_rnf !: depth of runoff in model levels
58	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: rnf_tsc_b, rnf_tsc !: before and now T & S runoff contents [K.m/s & PSU.m/s]
59
60	TYPE(FLD), PUBLIC, ALLOCATABLE, DIMENSION(:) :: sf_rnf ! structure: river runoff (file information, fields read)
61	TYPE(FLD), PUBLIC, ALLOCATABLE, DIMENSION(:) :: sf_s_rnf ! structure: river runoff salinity (file information, fields read)
62	TYPE(FLD), PUBLIC, ALLOCATABLE, DIMENSION(:) :: sf_t_rnf ! structure: river runoff temperature (file information, fields read)
63
64	!! * Substitutions
65	# include "domzgr_substitute.h90"
66	!!----------------------------------------------------------------------
67	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
68	!! $Id$
69	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
70	!!----------------------------------------------------------------------
71	CONTAINS
72
73	INTEGER FUNCTION sbc_rnf_alloc()
74	!!----------------------------------------------------------------------
75	!! * ROUTINE sbc_rnf_alloc *
76	!!----------------------------------------------------------------------
77	ALLOCATE( rnfmsk(jpi,jpj) , rnfmsk_z(jpk) , &
78	& h_rnf (jpi,jpj) , nk_rnf (jpi,jpj) , &
79	& rnf_tsc_b(jpi,jpj,jpts) , rnf_tsc (jpi,jpj,jpts) , STAT=sbc_rnf_alloc )
80	!
81	IF( lk_mpp ) CALL mpp_sum ( sbc_rnf_alloc )
82	IF( sbc_rnf_alloc > 0 ) CALL ctl_warn('sbc_rnf_alloc: allocation of arrays failed')
83	END FUNCTION sbc_rnf_alloc
84
85
86	SUBROUTINE sbc_rnf( kt )
87	!!----------------------------------------------------------------------
88	!! * ROUTINE sbc_rnf *
89	!!
90	!! ** Purpose : Introduce a climatological run off forcing
91	!!
92	!! ** Method : Set each river mouth with a monthly climatology
93	!! provided from different data.
94	!! CAUTION : upward water flux, runoff forced to be < 0
95	!!
96	!! ** Action : runoff updated runoff field at time-step kt
97	!!----------------------------------------------------------------------
98	INTEGER, INTENT(in) :: kt ! ocean time step
99	!
100	INTEGER :: ji, jj ! dummy loop indices
101	INTEGER :: z_err = 0 ! dummy integer for error handling
102	!!----------------------------------------------------------------------
103	REAL(wp), DIMENSION(:,:), POINTER :: ztfrz ! freezing point used for temperature correction
104	!
105	CALL wrk_alloc( jpi,jpj, ztfrz)
106
107	! ! ---------------------------------------- !
108	IF( kt /= nit000 ) THEN ! Swap of forcing fields !
109	! ! ---------------------------------------- !
110	rnf_b (:,: ) = rnf (:,: ) ! Swap the ocean forcing fields except at nit000
111	rnf_tsc_b(:,:,:) = rnf_tsc(:,:,:) ! where before fields are set at the end of the routine
112	!
113	ENDIF
114
115	! !-------------------!
116	IF( .NOT. ln_rnf_emp ) THEN ! Update runoff !
117	! !-------------------!
118	!
119	CALL fld_read ( kt, nn_fsbc, sf_rnf ) ! Read Runoffs data and provide it at kt
120	IF( ln_rnf_tem ) CALL fld_read ( kt, nn_fsbc, sf_t_rnf ) ! idem for runoffs temperature if required
121	IF( ln_rnf_sal ) CALL fld_read ( kt, nn_fsbc, sf_s_rnf ) ! idem for runoffs salinity if required
122	!
123	! Runoff reduction only associated to the ORCA2_LIM configuration
124	! when reading the NetCDF file runoff_1m_nomask.nc
125	IF( cp_cfg == 'orca' .AND. jp_cfg == 2 ) THEN
126	WHERE( 40._wp < gphit(:,:) .AND. gphit(:,:) < 65._wp )
127	sf_rnf(1)%fnow(:,:,1) = 0.85 * sf_rnf(1)%fnow(:,:,1)
128	END WHERE
129	ENDIF
130	!
131	IF( MOD( kt - 1, nn_fsbc ) == 0 ) THEN
132	!
133	rnf(:,:) = rn_rfact * ( sf_rnf(1)%fnow(:,:,1) ) ! updated runoff value at time step kt
134	!
135	! ! set temperature & salinity content of runoffs
136	IF( ln_rnf_tem ) THEN ! use runoffs temperature data
137	rnf_tsc(:,:,jp_tem) = ( sf_t_rnf(1)%fnow(:,:,1) ) * rnf(:,:) * r1_rau0
138	WHERE( sf_t_rnf(1)%fnow(:,:,1) == -999._wp ) ! if missing data value use SST as runoffs temperature
139	rnf_tsc(:,:,jp_tem) = sst_m(:,:) * rnf(:,:) * r1_rau0
140	END WHERE
141	WHERE( sf_t_rnf(1)%fnow(:,:,1) == -222._wp ) ! where fwf comes from melting of ice shelves or iceberg
142	ztfrz(:,:) = -1.9 !tfreez( sss_m(:,:) ) !PM to be discuss (trouble if sensitivity study)
143	rnf_tsc(:,:,jp_tem) = ztfrz(:,:) * rnf(:,:) * r1_rau0 - rnf(:,:) * lfusisf * r1_rau0_rcp
144	END WHERE
145	ELSE ! use SST as runoffs temperature
146	rnf_tsc(:,:,jp_tem) = sst_m(:,:) * rnf(:,:) * r1_rau0
147	ENDIF
148	! ! use runoffs salinity data
149	IF( ln_rnf_sal ) rnf_tsc(:,:,jp_sal) = ( sf_s_rnf(1)%fnow(:,:,1) ) * rnf(:,:) * r1_rau0
150	! ! else use S=0 for runoffs (done one for all in the init)
151	IF ( ANY( rnf(:,:) < 0._wp ) ) z_err=1
152	IF(lk_mpp) CALL mpp_sum(z_err)
153	IF( z_err > 0 ) CALL ctl_stop( 'sbc_rnf : negative runnoff values exist' )
154	!
155	CALL iom_put( "runoffs", rnf ) ! output runoffs arrays
156	ENDIF
157	!
158	ENDIF
159	!
160	IF( kt == nit000 ) THEN ! set the forcing field at nit000 - 1 !
161	! ! ---------------------------------------- !
162	IF( ln_rstart .AND. & !* Restart: read in restart file
163	& iom_varid( numror, 'rnf_b', ldstop = .FALSE. ) > 0 ) THEN
164	IF(lwp) WRITE(numout,*) ' nit000-1 runoff forcing fields red in the restart file'
165	CALL iom_get( numror, jpdom_autoglo, 'rnf_b', rnf_b ) ! before runoff
166	CALL iom_get( numror, jpdom_autoglo, 'rnf_hc_b', rnf_tsc_b(:,:,jp_tem) ) ! before heat content of runoff
167	CALL iom_get( numror, jpdom_autoglo, 'rnf_sc_b', rnf_tsc_b(:,:,jp_sal) ) ! before salinity content of runoff
168	ELSE !* no restart: set from nit000 values
169	IF(lwp) WRITE(numout,*) ' nit000-1 runoff forcing fields set to nit000'
170	rnf_b (:,: ) = rnf (:,: )
171	rnf_tsc_b(:,:,:) = rnf_tsc(:,:,:)
172	ENDIF
173	ENDIF
174	! ! ---------------------------------------- !
175	IF( lrst_oce ) THEN ! Write in the ocean restart file !
176	! ! ---------------------------------------- !
177	IF(lwp) WRITE(numout,*)
178	IF(lwp) WRITE(numout,*) 'sbcrnf : runoff forcing fields written in ocean restart file ', &
179	& 'at it= ', kt,' date= ', ndastp
180	IF(lwp) WRITE(numout,*) '~~~~'
181	CALL iom_rstput( kt, nitrst, numrow, 'rnf_b' , rnf )
182	CALL iom_rstput( kt, nitrst, numrow, 'rnf_hc_b', rnf_tsc(:,:,jp_tem) )
183	CALL iom_rstput( kt, nitrst, numrow, 'rnf_sc_b', rnf_tsc(:,:,jp_sal) )
184	ENDIF
185	CALL wrk_dealloc( jpi,jpj, ztfrz)
186	!
187	END SUBROUTINE sbc_rnf
188
189
190	SUBROUTINE sbc_rnf_div( phdivn )
191	!!----------------------------------------------------------------------
192	!! * ROUTINE sbc_rnf *
193	!!
194	!! ** Purpose : update the horizontal divergence with the runoff inflow
195	!!
196	!! ** Method :
197	!! CAUTION : rnf is positive (inflow) decreasing the
198	!! divergence and expressed in m/s
199	!!
200	!! ** Action : phdivn decreased by the runoff inflow
201	!!----------------------------------------------------------------------
202	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: phdivn ! horizontal divergence
203	!!
204	INTEGER :: ji, jj, jk ! dummy loop indices
205	REAL(wp) :: zfact ! local scalar
206	!!----------------------------------------------------------------------
207	!
208	zfact = 0.5_wp
209	!
210	IF( ln_rnf_depth ) THEN !== runoff distributed over several levels ==!
211	IF( lk_vvl ) THEN ! variable volume case
212	DO jj = 1, jpj ! update the depth over which runoffs are distributed
213	DO ji = 1, jpi
214	h_rnf(ji,jj) = 0._wp
215	DO jk = 1, nk_rnf(ji,jj) ! recalculates h_rnf to be the depth in metres
216	h_rnf(ji,jj) = h_rnf(ji,jj) + fse3t(ji,jj,jk) ! to the bottom of the relevant grid box
217	END DO
218	! ! apply the runoff input flow
219	DO jk = 1, nk_rnf(ji,jj)
220	phdivn(ji,jj,jk) = phdivn(ji,jj,jk) - ( rnf(ji,jj) + rnf_b(ji,jj) ) * zfact * r1_rau0 / h_rnf(ji,jj)
221	END DO
222	END DO
223	END DO
224	ELSE ! constant volume case : just apply the runoff input flow
225	DO jj = 1, jpj
226	DO ji = 1, jpi
227	DO jk = 1, nk_rnf(ji,jj)
228	phdivn(ji,jj,jk) = phdivn(ji,jj,jk) - ( rnf(ji,jj) + rnf_b(ji,jj) ) * zfact * r1_rau0 / h_rnf(ji,jj)
229	END DO
230	END DO
231	END DO
232	ENDIF
233	ELSE !== runoff put only at the surface ==!
234	IF( lk_vvl ) THEN ! variable volume case
235	h_rnf(:,:) = fse3t(:,:,1) ! recalculate h_rnf to be depth of top box
236	ENDIF
237	phdivn(:,:,1) = phdivn(:,:,1) - ( rnf(:,:) + rnf_b(:,:) ) * zfact * r1_rau0 / fse3t(:,:,1)
238	ENDIF
239	!
240	END SUBROUTINE sbc_rnf_div
241
242
243	SUBROUTINE sbc_rnf_init
244	!!----------------------------------------------------------------------
245	!! * ROUTINE sbc_rnf_init *
246	!!
247	!! ** Purpose : Initialisation of the runoffs if (ln_rnf=T)
248	!!
249	!! ** Method : - read the runoff namsbc_rnf namelist
250	!!
251	!! ** Action : - read parameters
252	!!----------------------------------------------------------------------
253	CHARACTER(len=32) :: rn_dep_file ! runoff file name
254	INTEGER :: ji, jj, jk ! dummy loop indices
255	INTEGER :: ierror, inum ! temporary integer
256	INTEGER :: ios ! Local integer output status for namelist read
257	!
258	NAMELIST/namsbc_rnf/ cn_dir, ln_rnf_emp, ln_rnf_depth, ln_rnf_tem, ln_rnf_sal, &
259	& sn_rnf, sn_cnf , sn_s_rnf , sn_t_rnf , sn_dep_rnf, &
260	& ln_rnf_mouth , rn_hrnf , rn_avt_rnf, rn_rfact
261	!!----------------------------------------------------------------------
262	!
263	! ! ============
264	! ! Namelist
265	! ! ============
266	!
267	REWIND( numnam_ref ) ! Namelist namsbc_rnf in reference namelist : Runoffs
268	READ ( numnam_ref, namsbc_rnf, IOSTAT = ios, ERR = 901)
269	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_rnf in reference namelist', lwp )
270
271	REWIND( numnam_cfg ) ! Namelist namsbc_rnf in configuration namelist : Runoffs
272	READ ( numnam_cfg, namsbc_rnf, IOSTAT = ios, ERR = 902 )
273	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_rnf in configuration namelist', lwp )
274	IF(lwm) WRITE ( numond, namsbc_rnf )
275	!
276	! ! Control print
277	IF(lwp) THEN
278	WRITE(numout,*)
279	WRITE(numout,*) 'sbc_rnf : runoff '
280	WRITE(numout,*) '~~~~~~~ '
281	WRITE(numout,*) ' Namelist namsbc_rnf'
282	WRITE(numout,*) ' runoff in a file to be read ln_rnf_emp = ', ln_rnf_emp
283	WRITE(numout,*) ' specific river mouths treatment ln_rnf_mouth = ', ln_rnf_mouth
284	WRITE(numout,*) ' river mouth additional Kz rn_avt_rnf = ', rn_avt_rnf
285	WRITE(numout,*) ' depth of river mouth additional mixing rn_hrnf = ', rn_hrnf
286	WRITE(numout,*) ' multiplicative factor for runoff rn_rfact = ', rn_rfact
287	ENDIF
288	!
289	! ! ==================
290	! ! Type of runoff
291	! ! ==================
292	! !== allocate runoff arrays
293	IF( sbc_rnf_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'sbc_rnf_alloc : unable to allocate arrays' )
294	!
295	IF( ln_rnf_emp ) THEN !== runoffs directly provided in the precipitations ==!
296	IF(lwp) WRITE(numout,*)
297	IF(lwp) WRITE(numout,*) ' runoffs directly provided in the precipitations'
298	IF( ln_rnf_depth .OR. ln_rnf_tem .OR. ln_rnf_sal ) THEN
299	CALL ctl_warn( 'runoffs already included in precipitations, so runoff (T,S, depth) attributes will not be used' )
300	ln_rnf_depth = .FALSE. ; ln_rnf_tem = .FALSE. ; ln_rnf_sal = .FALSE.
301	ENDIF
302	!
303	ELSE !== runoffs read in a file : set sf_rnf structure ==!
304	!
305	ALLOCATE( sf_rnf(1), STAT=ierror ) ! Create sf_rnf structure (runoff inflow)
306	IF(lwp) WRITE(numout,*)
307	IF(lwp) WRITE(numout,*) ' runoffs inflow read in a file'
308	IF( ierror > 0 ) THEN
309	CALL ctl_stop( 'sbc_rnf: unable to allocate sf_rnf structure' ) ; RETURN
310	ENDIF
311	ALLOCATE( sf_rnf(1)%fnow(jpi,jpj,1) )
312	IF( sn_rnf%ln_tint ) ALLOCATE( sf_rnf(1)%fdta(jpi,jpj,1,2) )
313	! ! fill sf_rnf with the namelist (sn_rnf) and control print
314	CALL fld_fill( sf_rnf, (/ sn_rnf /), cn_dir, 'sbc_rnf_init', 'read runoffs data', 'namsbc_rnf' )
315	!
316	IF( ln_rnf_tem ) THEN ! Create (if required) sf_t_rnf structure
317	IF(lwp) WRITE(numout,*)
318	IF(lwp) WRITE(numout,*) ' runoffs temperatures read in a file'
319	ALLOCATE( sf_t_rnf(1), STAT=ierror )
320	IF( ierror > 0 ) THEN
321	CALL ctl_stop( 'sbc_rnf_init: unable to allocate sf_t_rnf structure' ) ; RETURN
322	ENDIF
323	ALLOCATE( sf_t_rnf(1)%fnow(jpi,jpj,1) )
324	IF( sn_t_rnf%ln_tint ) ALLOCATE( sf_t_rnf(1)%fdta(jpi,jpj,1,2) )
325	CALL fld_fill (sf_t_rnf, (/ sn_t_rnf /), cn_dir, 'sbc_rnf_init', 'read runoff temperature data', 'namsbc_rnf' )
326	ENDIF
327	!
328	IF( ln_rnf_sal ) THEN ! Create (if required) sf_s_rnf and sf_t_rnf structures
329	IF(lwp) WRITE(numout,*)
330	IF(lwp) WRITE(numout,*) ' runoffs salinities read in a file'
331	ALLOCATE( sf_s_rnf(1), STAT=ierror )
332	IF( ierror > 0 ) THEN
333	CALL ctl_stop( 'sbc_rnf_init: unable to allocate sf_s_rnf structure' ) ; RETURN
334	ENDIF
335	ALLOCATE( sf_s_rnf(1)%fnow(jpi,jpj,1) )
336	IF( sn_s_rnf%ln_tint ) ALLOCATE( sf_s_rnf(1)%fdta(jpi,jpj,1,2) )
337	CALL fld_fill (sf_s_rnf, (/ sn_s_rnf /), cn_dir, 'sbc_rnf_init', 'read runoff salinity data', 'namsbc_rnf' )
338	ENDIF
339	!
340	IF( ln_rnf_depth ) THEN ! depth of runoffs set from a file
341	IF(lwp) WRITE(numout,*)
342	IF(lwp) WRITE(numout,*) ' runoffs depth read in a file'
343	rn_dep_file = TRIM( cn_dir )//TRIM( sn_dep_rnf%clname )
344	IF( .NOT. sn_dep_rnf%ln_clim ) THEN ; WRITE(rn_dep_file, '(a,"_y",i4)' ) TRIM( rn_dep_file ), nyear ! add year
345	IF( sn_dep_rnf%cltype == 'monthly' ) WRITE(rn_dep_file, '(a,"m",i2)' ) TRIM( rn_dep_file ), nmonth ! add month
346	ENDIF
347	CALL iom_open ( rn_dep_file, inum ) ! open file
348	CALL iom_get ( inum, jpdom_data, sn_dep_rnf%clvar, h_rnf ) ! read the river mouth array
349	CALL iom_close( inum ) ! close file
350	!
351	nk_rnf(:,:) = 0 ! set the number of level over which river runoffs are applied
352	DO jj = 1, jpj
353	DO ji = 1, jpi
354	IF( h_rnf(ji,jj) > 0._wp ) THEN
355	jk = 2
356	DO WHILE ( jk /= mbkt(ji,jj) .AND. gdept_0(ji,jj,jk) < h_rnf(ji,jj) ) ; jk = jk + 1 ; END DO
357	nk_rnf(ji,jj) = jk
358	ELSEIF( h_rnf(ji,jj) == -1._wp ) THEN ; nk_rnf(ji,jj) = 1
359	ELSEIF( h_rnf(ji,jj) == -999._wp ) THEN ; nk_rnf(ji,jj) = mbkt(ji,jj)
360	ELSE
361	CALL ctl_stop( 'sbc_rnf_init: runoff depth not positive, and not -999 or -1, rnf value in file fort.999' )
362	WRITE(999,*) 'ji, jj, h_rnf(ji,jj) :', ji, jj, h_rnf(ji,jj)
363	ENDIF
364	END DO
365	END DO
366	DO jj = 1, jpj ! set the associated depth
367	DO ji = 1, jpi
368	h_rnf(ji,jj) = 0._wp
369	DO jk = 1, nk_rnf(ji,jj)
370	h_rnf(ji,jj) = h_rnf(ji,jj) + fse3t(ji,jj,jk)
371	END DO
372	END DO
373	END DO
374	ELSE ! runoffs applied at the surface
375	nk_rnf(:,:) = 1
376	h_rnf (:,:) = fse3t(:,:,1)
377	ENDIF
378	!
379	ENDIF
380	!
381	rnf(:,:) = 0._wp ! runoff initialisation
382	rnf_tsc(:,:,:) = 0._wp ! runoffs temperature & salinty contents initilisation
383	!
384	! ! ========================
385	! ! River mouth vicinity
386	! ! ========================
387	!
388	IF( ln_rnf_mouth ) THEN ! Specific treatment in vicinity of river mouths :
389	! ! - Increase Kz in surface layers ( rn_hrnf > 0 )
390	! ! - set to zero SSS damping (ln_ssr=T)
391	! ! - mixed upstream-centered (ln_traadv_cen2=T)
392	!
393	IF ( ln_rnf_depth ) CALL ctl_warn( 'sbc_rnf_init: increased mixing turned on but effects may already', &
394	& 'be spread through depth by ln_rnf_depth' )
395	!
396	nkrnf = 0 ! Number of level over which Kz increase
397	IF( rn_hrnf > 0._wp ) THEN
398	nkrnf = 2
399	DO WHILE( nkrnf /= jpkm1 .AND. gdepw_1d(nkrnf+1) < rn_hrnf ) ; nkrnf = nkrnf + 1 ; END DO
400	IF( ln_sco ) CALL ctl_warn( 'sbc_rnf: number of levels over which Kz is increased is computed for zco...' )
401	ENDIF
402	IF(lwp) WRITE(numout,*)
403	IF(lwp) WRITE(numout,*) ' Specific treatment used in vicinity of river mouths :'
404	IF(lwp) WRITE(numout,*) ' - Increase Kz in surface layers (if rn_hrnf > 0 )'
405	IF(lwp) WRITE(numout,*) ' by ', rn_avt_rnf,' m2/s over ', nkrnf, ' w-levels'
406	IF(lwp) WRITE(numout,*) ' - set to zero SSS damping (if ln_ssr=T)'
407	IF(lwp) WRITE(numout,*) ' - mixed upstream-centered (if ln_traadv_cen2=T)'
408	!
409	CALL rnf_mouth ! set river mouth mask
410	!
411	ELSE ! No treatment at river mouths
412	IF(lwp) WRITE(numout,*)
413	IF(lwp) WRITE(numout,*) ' No specific treatment at river mouths'
414	rnfmsk (:,:) = 0._wp
415	rnfmsk_z(:) = 0._wp
416	nkrnf = 0
417	ENDIF
418	!
419	END SUBROUTINE sbc_rnf_init
420
421
422	SUBROUTINE rnf_mouth
423	!!----------------------------------------------------------------------
424	!! * ROUTINE rnf_mouth *
425	!!
426	!! ** Purpose : define the river mouths mask
427	!!
428	!! ** Method : read the river mouth mask (=0/1) in the river runoff
429	!! climatological file. Defined a given vertical structure.
430	!! CAUTION, the vertical structure is hard coded on the
431	!! first 5 levels.
432	!! This fields can be used to:
433	!! - set an upstream advection scheme
434	!! (ln_rnf_mouth=T and ln_traadv_cen2=T)
435	!! - increase vertical on the top nn_krnf vertical levels
436	!! at river runoff input grid point (nn_krnf>=2, see step.F90)
437	!! - set to zero SSS restoring flux at river mouth grid points
438	!!
439	!! ** Action : rnfmsk set to 1 at river runoff input, 0 elsewhere
440	!! rnfmsk_z vertical structure
441	!!----------------------------------------------------------------------
442	INTEGER :: inum ! temporary integers
443	CHARACTER(len=140) :: cl_rnfile ! runoff file name
444	!!----------------------------------------------------------------------
445	!
446	IF(lwp) WRITE(numout,*)
447	IF(lwp) WRITE(numout,*) 'rnf_mouth : river mouth mask'
448	IF(lwp) WRITE(numout,*) '~~~~~~~~~ '
449	!
450	cl_rnfile = TRIM( cn_dir )//TRIM( sn_cnf%clname )
451	IF( .NOT. sn_cnf%ln_clim ) THEN ; WRITE(cl_rnfile, '(a,"_y",i4)' ) TRIM( cl_rnfile ), nyear ! add year
452	IF( sn_cnf%cltype == 'monthly' ) WRITE(cl_rnfile, '(a,"m",i2)' ) TRIM( cl_rnfile ), nmonth ! add month
453	ENDIF
454	!
455	! horizontal mask (read in NetCDF file)
456	CALL iom_open ( cl_rnfile, inum ) ! open file
457	CALL iom_get ( inum, jpdom_data, sn_cnf%clvar, rnfmsk ) ! read the river mouth array
458	CALL iom_close( inum ) ! close file
459	!
460	IF( nn_closea == 1 ) CALL clo_rnf( rnfmsk ) ! closed sea inflow set as ruver mouth
461	!
462	rnfmsk_z(:) = 0._wp ! vertical structure
463	rnfmsk_z(1) = 1.0
464	rnfmsk_z(2) = 1.0 ! **********
465	rnfmsk_z(3) = 0.5 ! HARD CODED on the 5 first levels
466	rnfmsk_z(4) = 0.25 ! **********
467	rnfmsk_z(5) = 0.125
468	!
469	END SUBROUTINE rnf_mouth
470
471	!!======================================================================
472	END MODULE sbcrnf

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