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sbcrnf.F90 in branches/2013/dev_r3853_CNRS9_ConfSetting/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

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source: branches/2013/dev_r3853_CNRS9_ConfSetting/NEMOGCM/NEMO/OPA_SRC/SBC/sbcrnf.F90 @ 3901

Last change on this file since 3901 was 3901, checked in by clevy, 11 years ago
Configuration Setting/Step2, see ticket:#1074
Property svn:keywords set to `Id`
File size: 26.3 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 closea ! closed seas
22	USE fldread ! read input field at current time step
23	USE in_out_manager ! I/O manager
24	USE iom ! I/O module
25	USE lib_mpp ! MPP library
26
27	IMPLICIT NONE
28	PRIVATE
29
30	PUBLIC sbc_rnf ! routine call in sbcmod module
31	PUBLIC sbc_rnf_div ! routine called in sshwzv module
32	PUBLIC sbc_rnf_alloc ! routine call in sbcmod module
33	PUBLIC sbc_rnf_init ! (PUBLIC for TAM)
34	! !!* namsbc_rnf namelist *
35	CHARACTER(len=100), PUBLIC :: cn_dir !: Root directory for location of ssr files
36	LOGICAL , PUBLIC :: ln_rnf_depth !: depth river runoffs attribute specified in a file
37	LOGICAL , PUBLIC :: ln_rnf_tem !: temperature river runoffs attribute specified in a file
38	LOGICAL , PUBLIC :: ln_rnf_sal !: salinity river runoffs attribute specified in a file
39	LOGICAL , PUBLIC :: ln_rnf_emp !: runoffs into a file to be read or already into precipitation
40	TYPE(FLD_N) , PUBLIC :: sn_rnf !: information about the runoff file to be read
41	TYPE(FLD_N) , PUBLIC :: sn_cnf !: information about the runoff mouth file to be read
42	TYPE(FLD_N) :: sn_s_rnf !: information about the salinities of runoff file to be read
43	TYPE(FLD_N) :: sn_t_rnf !: information about the temperatures of runoff file to be read
44	TYPE(FLD_N) :: sn_dep_rnf !: information about the depth which river inflow affects
45	LOGICAL , PUBLIC :: ln_rnf_mouth !: specific treatment in mouths vicinity
46	REAL(wp) , PUBLIC :: rn_hrnf !: runoffs, depth over which enhanced vertical mixing is used
47	REAL(wp) , PUBLIC :: rn_avt_rnf !: runoffs, value of the additional vertical mixing coef. [m2/s]
48	REAL(wp) , PUBLIC :: rn_rfact !: multiplicative factor for runoff
49
50	INTEGER , PUBLIC :: nkrnf = 0 !: nb of levels over which Kz is increased at river mouths
51	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rnfmsk !: river mouth mask (hori.)
52	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:) :: rnfmsk_z !: river mouth mask (vert.)
53	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: h_rnf !: depth of runoff in m
54	INTEGER, PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: nk_rnf !: depth of runoff in model levels
55	REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: rnf_tsc_b, rnf_tsc !: before and now T & S runoff contents [K.m/s & PSU.m/s]
56
57	TYPE(FLD), PUBLIC, ALLOCATABLE, DIMENSION(:) :: sf_rnf ! structure: river runoff (file information, fields read)
58	TYPE(FLD), PUBLIC, ALLOCATABLE, DIMENSION(:) :: sf_s_rnf ! structure: river runoff salinity (file information, fields read)
59	TYPE(FLD), PUBLIC, ALLOCATABLE, DIMENSION(:) :: sf_t_rnf ! structure: river runoff temperature (file information, fields read)
60
61	!! * Substitutions
62	# include "domzgr_substitute.h90"
63	!!----------------------------------------------------------------------
64	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
65	!! $Id$
66	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
67	!!----------------------------------------------------------------------
68	CONTAINS
69
70	INTEGER FUNCTION sbc_rnf_alloc()
71	!!----------------------------------------------------------------------
72	!! * ROUTINE sbc_rnf_alloc *
73	!!----------------------------------------------------------------------
74	ALLOCATE( rnfmsk(jpi,jpj) , rnfmsk_z(jpk) , &
75	& h_rnf (jpi,jpj) , nk_rnf (jpi,jpj) , &
76	& rnf_tsc_b(jpi,jpj,jpts) , rnf_tsc (jpi,jpj,jpts) , STAT=sbc_rnf_alloc )
77	!
78	IF( lk_mpp ) CALL mpp_sum ( sbc_rnf_alloc )
79	IF( sbc_rnf_alloc > 0 ) CALL ctl_warn('sbc_rnf_alloc: allocation of arrays failed')
80	END FUNCTION sbc_rnf_alloc
81
82
83	SUBROUTINE sbc_rnf( kt )
84	!!----------------------------------------------------------------------
85	!! * ROUTINE sbc_rnf *
86	!!
87	!! ** Purpose : Introduce a climatological run off forcing
88	!!
89	!! ** Method : Set each river mouth with a monthly climatology
90	!! provided from different data.
91	!! CAUTION : upward water flux, runoff forced to be < 0
92	!!
93	!! ** Action : runoff updated runoff field at time-step kt
94	!!----------------------------------------------------------------------
95	INTEGER, INTENT(in) :: kt ! ocean time step
96	!
97	INTEGER :: ji, jj ! dummy loop indices
98	INTEGER :: z_err = 0 ! dummy integer for error handling
99	!!----------------------------------------------------------------------
100	!
101	IF( kt == nit000 ) CALL sbc_rnf_init ! Read namelist and allocate structures
102
103	! ! ---------------------------------------- !
104	IF( kt /= nit000 ) THEN ! Swap of forcing fields !
105	! ! ---------------------------------------- !
106	rnf_b (:,: ) = rnf (:,: ) ! Swap the ocean forcing fields except at nit000
107	rnf_tsc_b(:,:,:) = rnf_tsc(:,:,:) ! where before fields are set at the end of the routine
108	!
109	ENDIF
110
111	! !-------------------!
112	IF( .NOT. ln_rnf_emp ) THEN ! Update runoff !
113	! !-------------------!
114	!
115	CALL fld_read ( kt, nn_fsbc, sf_rnf ) ! Read Runoffs data and provide it at kt
116	IF( ln_rnf_tem ) CALL fld_read ( kt, nn_fsbc, sf_t_rnf ) ! idem for runoffs temperature if required
117	IF( ln_rnf_sal ) CALL fld_read ( kt, nn_fsbc, sf_s_rnf ) ! idem for runoffs salinity if required
118	!
119	! Runoff reduction only associated to the ORCA2_LIM configuration
120	! when reading the NetCDF file runoff_1m_nomask.nc
121	IF( cp_cfg == 'orca' .AND. jp_cfg == 2 ) THEN
122	WHERE( 40._wp < gphit(:,:) .AND. gphit(:,:) < 65._wp )
123	sf_rnf(1)%fnow(:,:,1) = 0.85 * sf_rnf(1)%fnow(:,:,1)
124	END WHERE
125	ENDIF
126	!
127	IF( MOD( kt - 1, nn_fsbc ) == 0 ) THEN
128	!
129	rnf(:,:) = rn_rfact * ( sf_rnf(1)%fnow(:,:,1) ) ! updated runoff value at time step kt
130	!
131	! ! set temperature & salinity content of runoffs
132	IF( ln_rnf_tem ) THEN ! use runoffs temperature data
133	rnf_tsc(:,:,jp_tem) = ( sf_t_rnf(1)%fnow(:,:,1) ) * rnf(:,:) * r1_rau0
134	WHERE( sf_t_rnf(1)%fnow(:,:,1) == -999._wp ) ! if missing data value use SST as runoffs temperature
135	rnf_tsc(:,:,jp_tem) = sst_m(:,:) * rnf(:,:) * r1_rau0
136	END WHERE
137	ELSE ! use SST as runoffs temperature
138	rnf_tsc(:,:,jp_tem) = sst_m(:,:) * rnf(:,:) * r1_rau0
139	ENDIF
140	! ! use runoffs salinity data
141	IF( ln_rnf_sal ) rnf_tsc(:,:,jp_sal) = ( sf_s_rnf(1)%fnow(:,:,1) ) * rnf(:,:) * r1_rau0
142	! ! else use S=0 for runoffs (done one for all in the init)
143	IF ( ANY( rnf(:,:) < 0._wp ) ) z_err=1
144	IF(lk_mpp) CALL mpp_sum(z_err)
145	IF( z_err > 0 ) CALL ctl_stop( 'sbc_rnf : negative runnoff values exist' )
146	!
147	CALL iom_put( "runoffs", rnf ) ! output runoffs arrays
148	ENDIF
149	!
150	ENDIF
151	!
152	IF( kt == nit000 ) THEN ! set the forcing field at nit000 - 1 !
153	! ! ---------------------------------------- !
154	IF( ln_rstart .AND. & !* Restart: read in restart file
155	& iom_varid( numror, 'rnf_b', ldstop = .FALSE. ) > 0 ) THEN
156	IF(lwp) WRITE(numout,*) ' nit000-1 runoff forcing fields red in the restart file'
157	CALL iom_get( numror, jpdom_autoglo, 'rnf_b', rnf_b ) ! before runoff
158	CALL iom_get( numror, jpdom_autoglo, 'rnf_hc_b', rnf_tsc_b(:,:,jp_tem) ) ! before heat content of runoff
159	CALL iom_get( numror, jpdom_autoglo, 'rnf_sc_b', rnf_tsc_b(:,:,jp_sal) ) ! before salinity content of runoff
160	ELSE !* no restart: set from nit000 values
161	IF(lwp) WRITE(numout,*) ' nit000-1 runoff forcing fields set to nit000'
162	rnf_b (:,: ) = rnf (:,: )
163	rnf_tsc_b(:,:,:) = rnf_tsc(:,:,:)
164	ENDIF
165	ENDIF
166	! ! ---------------------------------------- !
167	IF( lrst_oce ) THEN ! Write in the ocean restart file !
168	! ! ---------------------------------------- !
169	IF(lwp) WRITE(numout,*)
170	IF(lwp) WRITE(numout,*) 'sbcrnf : runoff forcing fields written in ocean restart file ', &
171	& 'at it= ', kt,' date= ', ndastp
172	IF(lwp) WRITE(numout,*) '~~~~'
173	CALL iom_rstput( kt, nitrst, numrow, 'rnf_b' , rnf )
174	CALL iom_rstput( kt, nitrst, numrow, 'rnf_hc_b', rnf_tsc(:,:,jp_tem) )
175	CALL iom_rstput( kt, nitrst, numrow, 'rnf_sc_b', rnf_tsc(:,:,jp_sal) )
176	ENDIF
177	!
178	END SUBROUTINE sbc_rnf
179
180
181	SUBROUTINE sbc_rnf_div( phdivn )
182	!!----------------------------------------------------------------------
183	!! * ROUTINE sbc_rnf *
184	!!
185	!! ** Purpose : update the horizontal divergence with the runoff inflow
186	!!
187	!! ** Method :
188	!! CAUTION : rnf is positive (inflow) decreasing the
189	!! divergence and expressed in m/s
190	!!
191	!! ** Action : phdivn decreased by the runoff inflow
192	!!----------------------------------------------------------------------
193	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: phdivn ! horizontal divergence
194	!!
195	INTEGER :: ji, jj, jk ! dummy loop indices
196	REAL(wp) :: zfact ! local scalar
197	!!----------------------------------------------------------------------
198	!
199	zfact = 0.5_wp
200	!
201	IF( ln_rnf_depth ) THEN !== runoff distributed over several levels ==!
202	IF( lk_vvl ) THEN ! variable volume case
203	DO jj = 1, jpj ! update the depth over which runoffs are distributed
204	DO ji = 1, jpi
205	h_rnf(ji,jj) = 0._wp
206	DO jk = 1, nk_rnf(ji,jj) ! recalculates h_rnf to be the depth in metres
207	h_rnf(ji,jj) = h_rnf(ji,jj) + fse3t(ji,jj,jk) ! to the bottom of the relevant grid box
208	END DO
209	! ! apply the runoff input flow
210	DO jk = 1, nk_rnf(ji,jj)
211	phdivn(ji,jj,jk) = phdivn(ji,jj,jk) - ( rnf(ji,jj) + rnf_b(ji,jj) ) * zfact * r1_rau0 / h_rnf(ji,jj)
212	END DO
213	END DO
214	END DO
215	ELSE ! constant volume case : just apply the runoff input flow
216	DO jj = 1, jpj
217	DO ji = 1, jpi
218	DO jk = 1, nk_rnf(ji,jj)
219	phdivn(ji,jj,jk) = phdivn(ji,jj,jk) - ( rnf(ji,jj) + rnf_b(ji,jj) ) * zfact * r1_rau0 / h_rnf(ji,jj)
220	END DO
221	END DO
222	END DO
223	ENDIF
224	ELSE !== runoff put only at the surface ==!
225	IF( lk_vvl ) THEN ! variable volume case
226	h_rnf(:,:) = fse3t(:,:,1) ! recalculate h_rnf to be depth of top box
227	ENDIF
228	phdivn(:,:,1) = phdivn(:,:,1) - ( rnf(:,:) + rnf_b(:,:) ) * zfact * r1_rau0 / fse3t(:,:,1)
229	ENDIF
230	!
231	END SUBROUTINE sbc_rnf_div
232
233
234	SUBROUTINE sbc_rnf_init
235	!!----------------------------------------------------------------------
236	!! * ROUTINE sbc_rnf_init *
237	!!
238	!! ** Purpose : Initialisation of the runoffs if (ln_rnf=T)
239	!!
240	!! ** Method : - read the runoff namsbc_rnf namelist
241	!!
242	!! ** Action : - read parameters
243	!!----------------------------------------------------------------------
244	CHARACTER(len=32) :: rn_dep_file ! runoff file name
245	INTEGER :: ji, jj, jk ! dummy loop indices
246	INTEGER :: ierror, inum ! temporary integer
247	INTEGER :: ios ! Local integer output status for namelist read
248	!
249	NAMELIST/namsbc_rnf/ cn_dir, ln_rnf_emp, ln_rnf_depth, ln_rnf_tem, ln_rnf_sal, &
250	& sn_rnf, sn_cnf , sn_s_rnf , sn_t_rnf , sn_dep_rnf, &
251	& ln_rnf_mouth , rn_hrnf , rn_avt_rnf, rn_rfact
252	!!----------------------------------------------------------------------
253	!
254	! ! ============
255	! ! Namelist
256	! ! ============
257	!
258	REWIND( numnam_ref ) ! Namelist namsbc_rnf in reference namelist : Runoffs
259	READ ( numnam_ref, namsbc_rnf, IOSTAT = ios, ERR = 901)
260	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_rnf in reference namelist', lwp )
261
262	REWIND( numnam_cfg ) ! Namelist namsbc_rnf in configuration namelist : Runoffs
263	READ ( numnam_cfg, namsbc_rnf, IOSTAT = ios, ERR = 902 )
264	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_rnf in configuration namelist', lwp )
265	WRITE ( numond, namsbc_rnf )
266	!
267	! ! Control print
268	IF(lwp) THEN
269	WRITE(numout,*)
270	WRITE(numout,*) 'sbc_rnf : runoff '
271	WRITE(numout,*) '~~~~~~~ '
272	WRITE(numout,*) ' Namelist namsbc_rnf'
273	WRITE(numout,*) ' runoff in a file to be read ln_rnf_emp = ', ln_rnf_emp
274	WRITE(numout,*) ' specific river mouths treatment ln_rnf_mouth = ', ln_rnf_mouth
275	WRITE(numout,*) ' river mouth additional Kz rn_avt_rnf = ', rn_avt_rnf
276	WRITE(numout,*) ' depth of river mouth additional mixing rn_hrnf = ', rn_hrnf
277	WRITE(numout,*) ' multiplicative factor for runoff rn_rfact = ', rn_rfact
278	ENDIF
279	!
280	! ! ==================
281	! ! Type of runoff
282	! ! ==================
283	! !== allocate runoff arrays
284	IF( sbc_rnf_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'sbc_rnf_alloc : unable to allocate arrays' )
285	!
286	IF( ln_rnf_emp ) THEN !== runoffs directly provided in the precipitations ==!
287	IF(lwp) WRITE(numout,*)
288	IF(lwp) WRITE(numout,*) ' runoffs directly provided in the precipitations'
289	IF( ln_rnf_depth .OR. ln_rnf_tem .OR. ln_rnf_sal ) THEN
290	CALL ctl_warn( 'runoffs already included in precipitations, so runoff (T,S, depth) attributes will not be used' )
291	ln_rnf_depth = .FALSE. ; ln_rnf_tem = .FALSE. ; ln_rnf_sal = .FALSE.
292	ENDIF
293	!
294	ELSE !== runoffs read in a file : set sf_rnf structure ==!
295	!
296	ALLOCATE( sf_rnf(1), STAT=ierror ) ! Create sf_rnf structure (runoff inflow)
297	IF(lwp) WRITE(numout,*)
298	IF(lwp) WRITE(numout,*) ' runoffs inflow read in a file'
299	IF( ierror > 0 ) THEN
300	CALL ctl_stop( 'sbc_rnf: unable to allocate sf_rnf structure' ) ; RETURN
301	ENDIF
302	ALLOCATE( sf_rnf(1)%fnow(jpi,jpj,1) )
303	IF( sn_rnf%ln_tint ) ALLOCATE( sf_rnf(1)%fdta(jpi,jpj,1,2) )
304	! ! fill sf_rnf with the namelist (sn_rnf) and control print
305	CALL fld_fill( sf_rnf, (/ sn_rnf /), cn_dir, 'sbc_rnf_init', 'read runoffs data', 'namsbc_rnf' )
306	!
307	IF( ln_rnf_tem ) THEN ! Create (if required) sf_t_rnf structure
308	IF(lwp) WRITE(numout,*)
309	IF(lwp) WRITE(numout,*) ' runoffs temperatures read in a file'
310	ALLOCATE( sf_t_rnf(1), STAT=ierror )
311	IF( ierror > 0 ) THEN
312	CALL ctl_stop( 'sbc_rnf_init: unable to allocate sf_t_rnf structure' ) ; RETURN
313	ENDIF
314	ALLOCATE( sf_t_rnf(1)%fnow(jpi,jpj,1) )
315	IF( sn_t_rnf%ln_tint ) ALLOCATE( sf_t_rnf(1)%fdta(jpi,jpj,1,2) )
316	CALL fld_fill (sf_t_rnf, (/ sn_t_rnf /), cn_dir, 'sbc_rnf_init', 'read runoff temperature data', 'namsbc_rnf' )
317	ENDIF
318	!
319	IF( ln_rnf_sal ) THEN ! Create (if required) sf_s_rnf and sf_t_rnf structures
320	IF(lwp) WRITE(numout,*)
321	IF(lwp) WRITE(numout,*) ' runoffs salinities read in a file'
322	ALLOCATE( sf_s_rnf(1), STAT=ierror )
323	IF( ierror > 0 ) THEN
324	CALL ctl_stop( 'sbc_rnf_init: unable to allocate sf_s_rnf structure' ) ; RETURN
325	ENDIF
326	ALLOCATE( sf_s_rnf(1)%fnow(jpi,jpj,1) )
327	IF( sn_s_rnf%ln_tint ) ALLOCATE( sf_s_rnf(1)%fdta(jpi,jpj,1,2) )
328	CALL fld_fill (sf_s_rnf, (/ sn_s_rnf /), cn_dir, 'sbc_rnf_init', 'read runoff salinity data', 'namsbc_rnf' )
329	ENDIF
330	!
331	IF( ln_rnf_depth ) THEN ! depth of runoffs set from a file
332	IF(lwp) WRITE(numout,*)
333	IF(lwp) WRITE(numout,*) ' runoffs depth read in a file'
334	rn_dep_file = TRIM( cn_dir )//TRIM( sn_dep_rnf%clname )
335	IF( .NOT. sn_dep_rnf%ln_clim ) THEN ; WRITE(rn_dep_file, '(a,"_y",i4)' ) TRIM( rn_dep_file ), nyear ! add year
336	IF( sn_dep_rnf%cltype == 'monthly' ) WRITE(rn_dep_file, '(a,"m",i2)' ) TRIM( rn_dep_file ), nmonth ! add month
337	ENDIF
338	CALL iom_open ( rn_dep_file, inum ) ! open file
339	CALL iom_get ( inum, jpdom_data, sn_dep_rnf%clvar, h_rnf ) ! read the river mouth array
340	CALL iom_close( inum ) ! close file
341	!
342	nk_rnf(:,:) = 0 ! set the number of level over which river runoffs are applied
343	DO jj = 1, jpj
344	DO ji = 1, jpi
345	IF( h_rnf(ji,jj) > 0._wp ) THEN
346	jk = 2
347	DO WHILE ( jk /= mbkt(ji,jj) .AND. fsdept(ji,jj,jk) < h_rnf(ji,jj) ) ; jk = jk + 1 ; END DO
348	nk_rnf(ji,jj) = jk
349	ELSEIF( h_rnf(ji,jj) == -1._wp ) THEN ; nk_rnf(ji,jj) = 1
350	ELSEIF( h_rnf(ji,jj) == -999._wp ) THEN ; nk_rnf(ji,jj) = mbkt(ji,jj)
351	ELSE
352	CALL ctl_stop( 'sbc_rnf_init: runoff depth not positive, and not -999 or -1, rnf value in file fort.999' )
353	WRITE(999,*) 'ji, jj, h_rnf(ji,jj) :', ji, jj, h_rnf(ji,jj)
354	ENDIF
355	END DO
356	END DO
357	DO jj = 1, jpj ! set the associated depth
358	DO ji = 1, jpi
359	h_rnf(ji,jj) = 0._wp
360	DO jk = 1, nk_rnf(ji,jj)
361	h_rnf(ji,jj) = h_rnf(ji,jj) + fse3t(ji,jj,jk)
362	END DO
363	END DO
364	END DO
365	ELSE ! runoffs applied at the surface
366	nk_rnf(:,:) = 1
367	h_rnf (:,:) = fse3t(:,:,1)
368	ENDIF
369	!
370	ENDIF
371	!
372	rnf(:,:) = 0._wp ! runoff initialisation
373	rnf_tsc(:,:,:) = 0._wp ! runoffs temperature & salinty contents initilisation
374	!
375	! ! ========================
376	! ! River mouth vicinity
377	! ! ========================
378	!
379	IF( ln_rnf_mouth ) THEN ! Specific treatment in vicinity of river mouths :
380	! ! - Increase Kz in surface layers ( rn_hrnf > 0 )
381	! ! - set to zero SSS damping (ln_ssr=T)
382	! ! - mixed upstream-centered (ln_traadv_cen2=T)
383	!
384	IF ( ln_rnf_depth ) CALL ctl_warn( 'sbc_rnf_init: increased mixing turned on but effects may already', &
385	& 'be spread through depth by ln_rnf_depth' )
386	!
387	nkrnf = 0 ! Number of level over which Kz increase
388	IF( rn_hrnf > 0._wp ) THEN
389	nkrnf = 2
390	DO WHILE( nkrnf /= jpkm1 .AND. gdepw_0(nkrnf+1) < rn_hrnf ) ; nkrnf = nkrnf + 1 ; END DO
391	IF( ln_sco ) CALL ctl_warn( 'sbc_rnf: number of levels over which Kz is increased is computed for zco...' )
392	ENDIF
393	IF(lwp) WRITE(numout,*)
394	IF(lwp) WRITE(numout,*) ' Specific treatment used in vicinity of river mouths :'
395	IF(lwp) WRITE(numout,*) ' - Increase Kz in surface layers (if rn_hrnf > 0 )'
396	IF(lwp) WRITE(numout,*) ' by ', rn_avt_rnf,' m2/s over ', nkrnf, ' w-levels'
397	IF(lwp) WRITE(numout,*) ' - set to zero SSS damping (if ln_ssr=T)'
398	IF(lwp) WRITE(numout,*) ' - mixed upstream-centered (if ln_traadv_cen2=T)'
399	!
400	CALL rnf_mouth ! set river mouth mask
401	!
402	ELSE ! No treatment at river mouths
403	IF(lwp) WRITE(numout,*)
404	IF(lwp) WRITE(numout,*) ' No specific treatment at river mouths'
405	rnfmsk (:,:) = 0._wp
406	rnfmsk_z(:) = 0._wp
407	nkrnf = 0
408	ENDIF
409	!
410	END SUBROUTINE sbc_rnf_init
411
412
413	SUBROUTINE rnf_mouth
414	!!----------------------------------------------------------------------
415	!! * ROUTINE rnf_mouth *
416	!!
417	!! ** Purpose : define the river mouths mask
418	!!
419	!! ** Method : read the river mouth mask (=0/1) in the river runoff
420	!! climatological file. Defined a given vertical structure.
421	!! CAUTION, the vertical structure is hard coded on the
422	!! first 5 levels.
423	!! This fields can be used to:
424	!! - set an upstream advection scheme
425	!! (ln_rnf_mouth=T and ln_traadv_cen2=T)
426	!! - increase vertical on the top nn_krnf vertical levels
427	!! at river runoff input grid point (nn_krnf>=2, see step.F90)
428	!! - set to zero SSS restoring flux at river mouth grid points
429	!!
430	!! ** Action : rnfmsk set to 1 at river runoff input, 0 elsewhere
431	!! rnfmsk_z vertical structure
432	!!----------------------------------------------------------------------
433	INTEGER :: inum ! temporary integers
434	CHARACTER(len=140) :: cl_rnfile ! runoff file name
435	!!----------------------------------------------------------------------
436	!
437	IF(lwp) WRITE(numout,*)
438	IF(lwp) WRITE(numout,*) 'rnf_mouth : river mouth mask'
439	IF(lwp) WRITE(numout,*) '~~~~~~~~~ '
440	!
441	cl_rnfile = TRIM( cn_dir )//TRIM( sn_cnf%clname )
442	IF( .NOT. sn_cnf%ln_clim ) THEN ; WRITE(cl_rnfile, '(a,"_y",i4)' ) TRIM( cl_rnfile ), nyear ! add year
443	IF( sn_cnf%cltype == 'monthly' ) WRITE(cl_rnfile, '(a,"m",i2)' ) TRIM( cl_rnfile ), nmonth ! add month
444	ENDIF
445	!
446	! horizontal mask (read in NetCDF file)
447	CALL iom_open ( cl_rnfile, inum ) ! open file
448	CALL iom_get ( inum, jpdom_data, sn_cnf%clvar, rnfmsk ) ! read the river mouth array
449	CALL iom_close( inum ) ! close file
450	!
451	IF( nn_closea == 1 ) CALL clo_rnf( rnfmsk ) ! closed sea inflow set as ruver mouth
452	!
453	rnfmsk_z(:) = 0._wp ! vertical structure
454	rnfmsk_z(1) = 1.0
455	rnfmsk_z(2) = 1.0 ! **********
456	rnfmsk_z(3) = 0.5 ! HARD CODED on the 5 first levels
457	rnfmsk_z(4) = 0.25 ! **********
458	rnfmsk_z(5) = 0.125
459	!
460	END SUBROUTINE rnf_mouth
461
462	!!======================================================================
463	END MODULE sbcrnf

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