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ldftra_c2d.h90 in branches/UKMO/dev_r5518_GO6_starthour_obsoper/NEMOGCM/NEMO/OPA_SRC/LDF – NEMO

source: branches/UKMO/dev_r5518_GO6_starthour_obsoper/NEMOGCM/NEMO/OPA_SRC/LDF/ldftra_c2d.h90 @ 12555

Last change on this file since 12555 was 12555, checked in by charris, 4 years ago

Changes from GO6 package branch (GMED ticket 450):

svn merge -r 11035:11101 ​svn+ssh://charris@forge.ipsl.jussieu.fr/ipsl/forge/projets/nemo/svn/branches/UKMO/dev_r5518_GO6_package
File size: 7.0 KB
Line 
1   !!----------------------------------------------------------------------
2   !!                      ***  ldftra_c2d.h90  ***
3   !!----------------------------------------------------------------------
4
5   !!----------------------------------------------------------------------
6   !! NEMO/OPA 3.3 , NEMO Consortium (2010)
7   !! $Id$
8   !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
9   !!----------------------------------------------------------------------
10
11   SUBROUTINE ldf_tra_c2d( ld_print )
12      !!----------------------------------------------------------------------
13      !!                  ***  ROUTINE ldftra_c2d  ***
14      !!             
15      !! ** Purpose :   initializations of horizontally non uniform eddy
16      !!      diffusivity coefficients
17      !!
18      !! ** Method :
19      !!       biharmonic operator    : ahtt = defined at T-level
20      !!                                ahtu,ahtv,ahtw never used
21      !!       harmonic operator (ahtt never used)
22      !!           iso-model level   : ahtu, ahtv defined at u-, v-points
23      !!         isopycnal         : ahtu, ahtv, ahtw defined at u-, v-, w-pts
24      !!         or geopotential   
25      !!       eddy induced velocity
26      !!           always harmonic   : aeiu, aeiv, aeiw defined at u-, v-, w-pts
27      !!----------------------------------------------------------------------
28      LOGICAL, INTENT (in) ::   ld_print   ! If true, print arrays in numout
29      !
30      INTEGER ::   ji, jj   ! dummy loop indices
31      REAL(wp) ::   za00, zd_max, zeumax, zevmax, zetmax
32      !!----------------------------------------------------------------------
33
34      IF( lk_traldf_eiv ) THEN
35         IF(lwp) WRITE(numout,*)
36         IF(lwp) WRITE(numout,*) ' ldf_tra_c2d : 2D eddy diffusivity and eddy'
37         IF(lwp) WRITE(numout,*) ' ~~~~~~~~~~~   --  induced velocity coefficients'
38         IF(lwp .AND. lflush) CALL flush(numout)
39      ELSE
40         IF(lwp) WRITE(numout,*)
41         IF(lwp) WRITE(numout,*) ' ldf_tra2d : 2D eddy diffusivity coefficient'
42         IF(lwp) WRITE(numout,*) ' ~~~~~~~~~~~   --'
43         IF(lwp .AND. lflush) CALL flush(numout)
44      ENDIF
45
46      zd_max = MAX( MAXVAL( e1t(:,:) ), MAXVAL( e2t(:,:) ) )
47      IF( lk_mpp ) CALL mpp_max( zd_max )   ! max over the global domain
48
49      ! harmonic operator : (U-, V-, W-points)
50      ! ==================
51      IF( ln_traldf_lap ) THEN
52         !
53         za00 = aht0 / zd_max
54         !
55         DO jj = 1, jpj
56            DO ji = 1, jpi
57               zeumax = MAX( e1u(ji,jj), e2u(ji,jj) )
58               zevmax = MAX( e1v(ji,jj), e2v(ji,jj) )
59               zetmax = MAX( e1t(ji,jj), e2t(ji,jj) )
60               ahtu(ji,jj) = za00 * zeumax ! set ahtu = ahtv at u- and v-points,
61               ahtv(ji,jj) = za00 * zevmax ! and ahtw at w-point (idem T-point)
62               ahtw(ji,jj) = za00 * zetmax !
63            END DO
64         END DO
65
66         CALL lbc_lnk( ahtu, 'U', 1. )   ! Lateral boundary conditions
67         CALL lbc_lnk( ahtv, 'V', 1. )   ! (no change of sign)
68         CALL lbc_lnk( ahtw, 'W', 1. )
69
70         ! Special case for ORCA R2 and R4 configurations (overwrite the value of ahtu ahtv ahtw)
71         ! ==============================================
72         IF( cp_cfg == "orca" .AND. ( jp_cfg == 2 .OR. jp_cfg == 4 ) )   THEN
73            ahtu(:,:) = aht0              ! set ahtu = ahtv at u- and v-points,
74            ahtv(:,:) = aht0              ! and ahtw at w-point
75            ahtw(:,:) = aht0              ! (here : no space variation)
76            IF(lwp) WRITE(numout,*) '               ORCA R2 or R4 case'
77            IF(lwp) WRITE(numout,*) '               Constant values used for eddy diffusivity coefficients'
78            IF(lwp) WRITE(numout,*) '               Variation lat/lon only for eddy induced velocity coefficients'
79            IF(lwp .AND. lflush) CALL flush(numout)
80         ENDIF
81
82         ! Control print
83         IF( lwp .AND. ld_print ) THEN
84            WRITE(numout,*)
85            WRITE(numout,*) 'inildf: ahtu array'
86            CALL prihre( ahtu, jpi, jpj, 1, jpi, 1,   &
87               &                         1, jpj, 1, 1.e-3, numout )
88            WRITE(numout,*)
89            WRITE(numout,*) 'inildf: ahtv array'
90            CALL prihre( ahtv, jpi, jpj, 1, jpi, 1,   &
91               &                         1, jpj, 1, 1.e-3, numout )
92            WRITE(numout,*)
93            WRITE(numout,*) 'inildf: ahtw array'
94            CALL prihre( ahtw, jpi, jpj, 1, jpi, 1,   &
95               &                         1, jpj, 1, 1.e-3, numout )
96         ENDIF
97      ENDIF
98     
99      ! biharmonic operator : (T-point)
100      ! ====================
101      IF( ln_traldf_bilap ) THEN
102         ! (USER: modify ahtt following your desiderata)
103         ! Here: ahm is proportional to the cube of the maximum of the gridspacing
104         !       in the to horizontal direction
105
106         zd_max = MAX( MAXVAL( e1t(:,:) ), MAXVAL( e2t(:,:) ) )
107         IF( lk_mpp )   CALL mpp_max( zd_max )   ! max over the global domain
108
109         za00 = aht0 / ( zd_max * zd_max * zd_max )
110         DO jj = 1, jpj
111            DO ji = 1, jpi
112               zetmax = MAX( e1t(ji,jj), e2t(ji,jj) )
113               ahtt(ji,jj) = za00 * zetmax * zetmax * zetmax      ! set ahtt at T-point
114            END DO
115         END DO
116
117         CALL lbc_lnk( ahtt, 'T', 1. )   ! Lateral boundary conditions on ( ahtt )
118
119         ! Control print
120         IF( lwp .AND. ld_print ) THEN
121            WRITE(numout,*)
122            WRITE(numout,*) 'inildf: 2D ahtt array'
123            CALL prihre( ahtt, jpi, jpj, 1, jpi, 1,   &
124               &                         1, jpj, 1, 1.e-3, numout )
125         ENDIF
126      ENDIF
127
128# if defined key_traldf_eiv
129      ! set aeiu = aeiv at u- and v-points, and aeiw at w-point (idem T-point)
130      ! (here no space variation)
131      aeiu(:,:) = aeiv0
132      aeiv(:,:) = aeiv0
133      aeiw(:,:) = aeiv0
134     
135      IF( cp_cfg == "orca" .AND. jp_cfg == 4 ) THEN
136         !                                 ! Cancel eiv in Gibraltar strait
137         aeiu( mi0(68):mi1(71) , mj0(50):mj1(53) ) = 0.e0
138         aeiv( mi0(68):mi1(71) , mj0(50):mj1(53) ) = 0.e0
139         aeiw( mi0(68):mi1(71) , mj0(50):mj1(53) ) = 0.e0
140         !                                 ! Cancel eiv in Mediterrannean sea
141         aeiu( mi0(70):mi1(90) , mj0(49):mj1(56) ) = 0.e0
142         aeiv( mi0(70):mi1(90) , mj0(49):mj1(56) ) = 0.e0
143         aeiw( mi0(70):mi1(90) , mj0(49):mj1(56) ) = 0.e0
144      ENDIF
145
146      ! Lateral boundary conditions on ( aeiu, aeiv, aeiw )
147      CALL lbc_lnk( aeiu, 'U', 1. )
148      CALL lbc_lnk( aeiv, 'V', 1. )
149      CALL lbc_lnk( aeiw, 'W', 1. )
150
151      ! Control print
152      IF( lwp .AND. ld_print ) THEN
153         WRITE(numout,*)
154         WRITE(numout,*) 'inildf: aeiu array'
155         CALL prihre(aeiu,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout)
156         WRITE(numout,*)
157         WRITE(numout,*) 'inildf: aeiv array'
158         CALL prihre(aeiv,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout)
159         WRITE(numout,*)
160         WRITE(numout,*) 'inildf: aeiw array'
161         CALL prihre(aeiw,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout)
162      ENDIF
163# endif
164      !
165   END SUBROUTINE ldf_tra_c2d
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