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limthd_sal.F90 in branches/2016/dev_r6711_SIMPLIF_6_aerobulk/NEMOGCM/NEMO/LIM_SRC_3 – NEMO

source: branches/2016/dev_r6711_SIMPLIF_6_aerobulk/NEMOGCM/NEMO/LIM_SRC_3/limthd_sal.F90 @ 7163

Last change on this file since 7163 was 7163, checked in by gm, 7 years ago

#1751 - branch SIMPLIF_6_aerobulk: update option control in sbcmod + uniformization of print in ocean_output (many module involved)
  • Property svn:keywords set to Id
File size: 7.9 KB
Line 
1MODULE limthd_sal
2   !!======================================================================
3   !!                       ***  MODULE limthd_sal ***
4   !! LIM-3 sea-ice :  computation of salinity variations in the ice
5   !!======================================================================
6   !! History :   -   ! 2003-05 (M. Vancoppenolle) UCL-ASTR first coding for LIM3-1D
7   !!            3.0  ! 2005-12 (M. Vancoppenolle) adapted to the 3-D version
8   !!            4.0  ! 2011-02 (G. Madec) dynamical allocation
9   !!---------------------------------------------------------------------
10#if defined key_lim3
11   !!----------------------------------------------------------------------
12   !!   'key_lim3'                                      LIM-3 sea-ice model
13   !!----------------------------------------------------------------------
14   !!   lim_thd_sal   : salinity variations in the ice
15   !!----------------------------------------------------------------------
16   USE par_oce        ! ocean parameters
17   USE phycst         ! physical constants (ocean directory)
18   USE sbc_oce        ! Surface boundary condition: ocean fields
19   USE ice            ! LIM variables
20   USE thd_ice        ! LIM thermodynamics
21   USE limvar         ! LIM variables
22   USE in_out_manager ! I/O manager
23   USE lib_mpp        ! MPP library
24   USE wrk_nemo       ! work arrays
25   USE lib_fortran    ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) 
26
27   IMPLICIT NONE
28   PRIVATE
29
30   PUBLIC   lim_thd_sal        ! called by limthd module
31   PUBLIC   lim_thd_sal_init   ! called by sbc_lim_init
32
33   !!----------------------------------------------------------------------
34   !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011)
35   !! $Id$
36   !! Software governed by the CeCILL licence     (NEMOGCM/NEMO_CeCILL.txt)
37   !!----------------------------------------------------------------------
38CONTAINS
39
40   SUBROUTINE lim_thd_sal( kideb, kiut )
41      !!-------------------------------------------------------------------
42      !!                ***  ROUTINE lim_thd_sal  ***   
43      !!   
44      !! ** Purpose :   computes new salinities in the ice
45      !!
46      !! ** Method  :  3 possibilities
47      !!               -> nn_icesal = 1 -> Sice = cst    [ice salinity constant in both time & space]
48      !!               -> nn_icesal = 2 -> Sice = S(z,t) [Vancoppenolle et al. 2005]
49      !!               -> nn_icesal = 3 -> Sice = S(z)   [multiyear ice]
50      !!---------------------------------------------------------------------
51      INTEGER, INTENT(in) ::   kideb, kiut   ! thickness category index
52      !
53      INTEGER  ::   ji, jk     ! dummy loop indices
54      REAL(wp) ::   iflush, igravdr   ! local scalars
55      !!---------------------------------------------------------------------
56
57      !---------------------------------------------------------
58      !  0) Update ice salinity from snow-ice and bottom growth
59      !---------------------------------------------------------
60      DO ji = kideb, kiut
61         sm_i_1d(ji) = sm_i_1d(ji) + dsm_i_se_1d(ji) + dsm_i_si_1d(ji)
62      END DO
63 
64      !--------------------------------------------------------------------|
65      ! 1) salinity constant in time                                       |
66      !--------------------------------------------------------------------|
67      ! do nothing
68
69      !----------------------------------------------------------------------|
70      !  2) salinity varying in time                                         |
71      !----------------------------------------------------------------------|
72      IF(  nn_icesal == 2  ) THEN
73
74         DO ji = kideb, kiut
75            !
76            ! Switches
77            !----------
78            iflush  = MAX( 0._wp , SIGN( 1._wp , t_su_1d(ji) - rt0 )        )     ! =1 if summer
79            igravdr = MAX( 0._wp , SIGN( 1._wp , t_bo_1d(ji) - t_su_1d(ji) ) )    ! =1 if t_su < t_bo
80
81            !---------------------
82            ! Salinity tendencies
83            !---------------------
84            ! drainage by gravity drainage
85            dsm_i_gd_1d(ji) = - igravdr * MAX( sm_i_1d(ji) - rn_sal_gd , 0._wp ) / rn_time_gd * rdt_ice 
86            ! drainage by flushing 
87            dsm_i_fl_1d(ji) = - iflush  * MAX( sm_i_1d(ji) - rn_sal_fl , 0._wp ) / rn_time_fl * rdt_ice
88
89            !-----------------
90            ! Update salinity   
91            !-----------------
92            ! only drainage terms ( gravity drainage and flushing )
93            ! snow ice / bottom sources are added in lim_thd_ent to conserve energy
94            sm_i_1d(ji) = sm_i_1d(ji) + dsm_i_fl_1d(ji) + dsm_i_gd_1d(ji)
95
96            !----------------------------
97            ! Salt flux - brine drainage
98            !----------------------------
99            sfx_bri_1d(ji) = sfx_bri_1d(ji) - rhoic * a_i_1d(ji) * ht_i_1d(ji) * ( dsm_i_fl_1d(ji) + dsm_i_gd_1d(ji) ) * r1_rdtice
100
101         END DO
102
103         ! Salinity profile
104         CALL lim_var_salprof1d( kideb, kiut )
105         !
106      ENDIF 
107
108      !------------------------------------------------------------------------------|
109      !  3) vertical profile of salinity, constant in time                           |
110      !------------------------------------------------------------------------------|
111      IF(  nn_icesal == 3  )   CALL lim_var_salprof1d( kideb, kiut )
112
113      !
114   END SUBROUTINE lim_thd_sal
115
116
117   SUBROUTINE lim_thd_sal_init
118      !!-------------------------------------------------------------------
119      !!                  ***  ROUTINE lim_thd_sal_init  ***
120      !!
121      !! ** Purpose :   initialization of ice salinity parameters
122      !!
123      !! ** Method  :   Read the namicesal namelist and check the parameter
124      !!              values called at the first timestep (nit000)
125      !!
126      !! ** input   :   Namelist namicesal
127      !!-------------------------------------------------------------------
128      INTEGER  ::   ios                 ! Local integer output status for namelist read
129      NAMELIST/namicesal/ nn_icesal, rn_icesal, rn_sal_gd, rn_time_gd, rn_sal_fl, rn_time_fl,   &
130         &                rn_simax, rn_simin 
131      !!-------------------------------------------------------------------
132      !
133      REWIND( numnam_ice_ref )              ! Namelist namicesal in reference namelist : Ice salinity
134      READ  ( numnam_ice_ref, namicesal, IOSTAT = ios, ERR = 901)
135901   IF( ios /= 0 ) CALL ctl_nam ( ios , 'namicesal in reference namelist', lwp )
136
137      REWIND( numnam_ice_cfg )              ! Namelist namicesal in configuration namelist : Ice salinity
138      READ  ( numnam_ice_cfg, namicesal, IOSTAT = ios, ERR = 902 )
139902   IF( ios /= 0 ) CALL ctl_nam ( ios , 'namicesal in configuration namelist', lwp )
140      IF(lwm) WRITE ( numoni, namicesal )
141      !
142      IF(lwp) THEN                           ! control print
143         WRITE(numout,*)
144         WRITE(numout,*) 'lim_thd_sal_init : Ice parameters for salinity '
145         WRITE(numout,*) '~~~~~~~~~~~~~~~~'
146         WRITE(numout,*) '   Namelist namicesal :'
147         WRITE(numout,*) '      switch for salinity nn_icesal        = ', nn_icesal
148         WRITE(numout,*) '      bulk salinity value if nn_icesal = 1 = ', rn_icesal
149         WRITE(numout,*) '      restoring salinity for GD            = ', rn_sal_gd
150         WRITE(numout,*) '      restoring time for GD                = ', rn_time_gd
151         WRITE(numout,*) '      restoring salinity for flushing      = ', rn_sal_fl
152         WRITE(numout,*) '      restoring time for flushing          = ', rn_time_fl
153         WRITE(numout,*) '      Maximum tolerated ice salinity       = ', rn_simax
154         WRITE(numout,*) '      Minimum tolerated ice salinity       = ', rn_simin
155      ENDIF
156      !
157   END SUBROUTINE lim_thd_sal_init
158
159#else
160   !!----------------------------------------------------------------------
161   !!   Default option         Dummy Module          No LIM-3 sea-ice model
162   !!----------------------------------------------------------------------
163#endif
164   !!======================================================================
165END MODULE limthd_sal
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