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traisf.F90 in NEMO/branches/2020/dev_r12527_Gurvan_ShallowWater/src/OCE/TRA – NEMO

source: NEMO/branches/2020/dev_r12527_Gurvan_ShallowWater/src/OCE/TRA/traisf.F90 @ 13151

Last change on this file since 13151 was 13151, checked in by gm, 4 years ago

result from merge with qco r12983

File size: 7.2 KB
Line 
1MODULE traisf
2   !!==============================================================================
3   !!                       ***  MODULE  traisf  ***
4   !! Ocean active tracers:  ice shelf boundary condition
5   !!==============================================================================
6   !! History :    4.0  !  2019-09  (P. Mathiot) original file
7   !!----------------------------------------------------------------------
8
9   !!----------------------------------------------------------------------
10   !!   tra_isf       : update the tracer trend at ocean surface
11   !!----------------------------------------------------------------------
12   USE isf_oce                                     ! Ice shelf variables
13   USE dom_oce                                     ! ocean space domain variables
14   USE isfutils, ONLY : debug                      ! debug option
15   USE timing  , ONLY : timing_start, timing_stop  ! Timing
16   USE in_out_manager                              ! I/O manager
17
18   IMPLICIT NONE
19   PRIVATE
20
21   PUBLIC   tra_isf   ! routine called by step.F90
22
23   !! * Substitutions
24#  include "do_loop_substitute.h90"
25#  include "domzgr_substitute.h90"
26   !!----------------------------------------------------------------------
27   !! NEMO/OCE 4.0 , NEMO Consortium (2018)
28   !! $Id: trasbc.F90 10499 2019-01-10 15:12:24Z deazer $
29   !! Software governed by the CeCILL license (see ./LICENSE)
30   !!----------------------------------------------------------------------
31CONTAINS
32
33   SUBROUTINE tra_isf ( kt, Kmm, pts, Krhs )
34      !!----------------------------------------------------------------------
35      !!                  ***  ROUTINE tra_isf  ***
36      !!
37      !! ** Purpose :  Compute the temperature trend due to the ice shelf melting (qhoce + qhc)
38      !!
39      !! ** Action  : - update pts(:,:,:,:,Krhs) for cav, par and cpl case
40      !!----------------------------------------------------------------------
41      INTEGER                                  , INTENT(in   ) :: kt        ! ocean time step
42      INTEGER                                  , INTENT(in   ) :: Kmm, Krhs ! ocean time level indices
43      REAL(wp), DIMENSION(jpi,jpj,jpk,jpts,jpt), INTENT(inout) :: pts       ! active tracers and RHS of tracer equation
44      !!----------------------------------------------------------------------
45      !
46      IF( ln_timing )   CALL timing_start('tra_isf')
47      !
48      IF( kt == nit000 ) THEN
49         IF(lwp) WRITE(numout,*)
50         IF(lwp) WRITE(numout,*) 'tra_isf : Ice shelf heat fluxes'
51         IF(lwp) WRITE(numout,*) '~~~~~~~ '
52      ENDIF
53      !
54      ! cavity case
55      IF ( ln_isfcav_mlt ) CALL tra_isf_mlt(misfkt_cav, misfkb_cav, rhisf_tbl_cav, rfrac_tbl_cav, risf_cav_tsc, risf_cav_tsc_b, pts(:,:,:,:,Krhs))
56      !
57      ! parametrisation case
58      IF ( ln_isfpar_mlt ) CALL tra_isf_mlt(misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par, risf_par_tsc, risf_par_tsc_b, pts(:,:,:,:,Krhs))
59      !
60      ! ice sheet coupling case
61      IF ( ln_isfcpl ) THEN
62         !
63         ! Dynamical stability at start up after change in under ice shelf cavity geometry is achieve by correcting the divergence.
64         ! This is achieved by applying a volume flux in order to keep the horizontal divergence after remapping
65         ! the same as at the end of the latest time step. So correction need to be apply at nit000 (euler time step) and
66         ! half of it at nit000+1 (leap frog time step).
67         ! in accordance to this, the heat content flux due to injected water need to be added in the temperature and salt trend
68         ! at time step nit000 and nit000+1
69         IF ( kt == nit000  ) CALL tra_isf_cpl(Kmm, risfcpl_tsc       , pts(:,:,:,:,Krhs))
70         IF ( kt == nit000+1) CALL tra_isf_cpl(Kmm, risfcpl_tsc*0.5_wp, pts(:,:,:,:,Krhs))
71         !
72         ! ensure 0 trend due to unconservation of the ice shelf coupling
73         IF ( ln_isfcpl_cons ) CALL tra_isf_cpl(Kmm, risfcpl_cons_tsc, pts(:,:,:,:,Krhs))
74         !
75      END IF
76      !
77      IF ( ln_isfdebug ) THEN
78         CALL debug('tra_isf: pts(:,:,:,:,Krhs) T', pts(:,:,:,1,Krhs))
79         CALL debug('tra_isf: pts(:,:,:,:,Krhs) S', pts(:,:,:,2,Krhs))
80      END IF
81      !
82      IF( ln_timing )   CALL timing_stop('tra_isf')
83      !
84   END SUBROUTINE tra_isf
85   !
86   SUBROUTINE tra_isf_mlt(ktop, kbot, phtbl, pfrac, ptsc, ptsc_b, pts)
87      !!----------------------------------------------------------------------
88      !!                  ***  ROUTINE tra_isf_mlt  ***
89      !!
90      !! *** Purpose :  Compute the temperature trend due to the ice shelf melting (qhoce + qhc) for cav or par case
91      !!
92      !! *** Action :: Update pts(:,:,:,:,Krhs) with the surface boundary condition trend
93      !!
94      !!----------------------------------------------------------------------
95      REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(inout) :: pts
96      !!----------------------------------------------------------------------
97      INTEGER , DIMENSION(jpi,jpj)     , INTENT(in   ) :: ktop , kbot
98      REAL(wp), DIMENSION(jpi,jpj)     , INTENT(in   ) :: phtbl, pfrac
99      REAL(wp), DIMENSION(jpi,jpj,jpts), INTENT(in   ) :: ptsc , ptsc_b
100      !!----------------------------------------------------------------------
101      INTEGER                      :: ji,jj,jk  ! loop index
102      INTEGER                      :: ikt, ikb  ! top and bottom level of the tbl
103      REAL(wp), DIMENSION(jpi,jpj) :: ztc       ! total ice shelf tracer trend
104      !!----------------------------------------------------------------------
105      !
106      ! compute 2d total trend due to isf
107      ztc(:,:) = 0.5_wp * ( ptsc(:,:,jp_tem) + ptsc_b(:,:,jp_tem) ) / phtbl(:,:)
108      !
109      ! update pts(:,:,:,:,Krhs)
110      DO_2D_11_11
111         !
112         ikt = ktop(ji,jj)
113         ikb = kbot(ji,jj)
114         !
115         ! level fully include in the ice shelf boundary layer
116         DO jk = ikt, ikb - 1
117            pts(ji,jj,jk,jp_tem) = pts(ji,jj,jk,jp_tem) + ztc(ji,jj)
118         END DO
119         !
120         ! level partially include in ice shelf boundary layer
121         pts(ji,jj,ikb,jp_tem) = pts(ji,jj,ikb,jp_tem) + ztc(ji,jj) * pfrac(ji,jj)
122         !
123      END_2D
124      !
125   END SUBROUTINE tra_isf_mlt
126   !
127   SUBROUTINE tra_isf_cpl( Kmm, ptsc, ptsa )
128      !!----------------------------------------------------------------------
129      !!                  ***  ROUTINE tra_isf_cpl  ***
130      !!
131      !! *** Action :: Update pts(:,:,:,:,Krhs) with the ice shelf coupling trend
132      !!
133      !!----------------------------------------------------------------------
134      REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(inout) :: ptsa
135      !!----------------------------------------------------------------------
136      INTEGER                              , INTENT(in   ) :: Kmm   ! ocean time level index
137      REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(in   ) :: ptsc
138      !!----------------------------------------------------------------------
139      INTEGER :: jk
140      !!----------------------------------------------------------------------
141      !
142      DO jk = 1,jpk
143         ptsa(:,:,jk,jp_tem) =   &
144            &  ptsa(:,:,jk,jp_tem) + ptsc(:,:,jk,jp_tem) * r1_e1e2t(:,:) / e3t(:,:,jk,Kmm)
145         ptsa(:,:,jk,jp_sal) =   &
146            &  ptsa(:,:,jk,jp_sal) + ptsc(:,:,jk,jp_sal) * r1_e1e2t(:,:) / e3t(:,:,jk,Kmm)
147      END DO
148      !
149   END SUBROUTINE tra_isf_cpl
150   !
151END MODULE traisf
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