1 | MODULE dynnxt |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE dynnxt *** |
---|
4 | !! Ocean dynamics: time stepping |
---|
5 | !!====================================================================== |
---|
6 | !!====================================================================== |
---|
7 | !! History : OPA ! 1987-02 (P. Andrich, D. L Hostis) Original code |
---|
8 | !! ! 1990-10 (C. Levy, G. Madec) |
---|
9 | !! 7.0 ! 1993-03 (M. Guyon) symetrical conditions |
---|
10 | !! 8.0 ! 1997-02 (G. Madec & M. Imbard) opa, release 8.0 |
---|
11 | !! 8.2 ! 1997-04 (A. Weaver) Euler forward step |
---|
12 | !! - ! 1997-06 (G. Madec) lateral boudary cond., lbc routine |
---|
13 | !! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module |
---|
14 | !! - ! 2002-10 (C. Talandier, A-M. Treguier) Open boundary cond. |
---|
15 | !! 2.0 ! 2005-11 (V. Garnier) Surface pressure gradient organization |
---|
16 | !! 2.3 ! 2007-07 (D. Storkey) Calls to BDY routines. |
---|
17 | !! 3.1 ! 2009-02 (G. Madec) re-introduce the vvl option |
---|
18 | !!---------------------------------------------------------------------- |
---|
19 | |
---|
20 | !!---------------------------------------------------------------------- |
---|
21 | !! dyn_nxt : update the horizontal velocity from the momentum trend |
---|
22 | !!---------------------------------------------------------------------- |
---|
23 | !! * Modules used |
---|
24 | USE oce ! ocean dynamics and tracers |
---|
25 | USE dom_oce ! ocean space and time domain |
---|
26 | USE in_out_manager ! I/O manager |
---|
27 | USE obc_oce ! ocean open boundary conditions |
---|
28 | USE obcdyn ! open boundary condition for momentum (obc_dyn routine) |
---|
29 | USE obcdyn_bt ! 2D open boundary condition for momentum (obc_dyn_bt routine) |
---|
30 | USE obcvol ! ocean open boundary condition (obc_vol routines) |
---|
31 | USE bdy_oce ! unstructured open boundary conditions |
---|
32 | USE bdydta ! unstructured open boundary conditions |
---|
33 | USE bdydyn ! unstructured open boundary conditions |
---|
34 | USE dynspg_oce ! type of surface pressure gradient |
---|
35 | USE lbclnk ! lateral boundary condition (or mpp link) |
---|
36 | USE prtctl ! Print control |
---|
37 | USE agrif_opa_update |
---|
38 | USE agrif_opa_interp |
---|
39 | USE domvvl ! variable volume |
---|
40 | |
---|
41 | IMPLICIT NONE |
---|
42 | PRIVATE |
---|
43 | |
---|
44 | !! * Accessibility |
---|
45 | PUBLIC dyn_nxt ! routine called by step.F90 |
---|
46 | !! * Substitutions |
---|
47 | # include "domzgr_substitute.h90" |
---|
48 | !!---------------------------------------------------------------------- |
---|
49 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
---|
50 | !! $Id$ |
---|
51 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
---|
52 | !!---------------------------------------------------------------------- |
---|
53 | |
---|
54 | CONTAINS |
---|
55 | |
---|
56 | SUBROUTINE dyn_nxt ( kt ) |
---|
57 | !!---------------------------------------------------------------------- |
---|
58 | !! *** ROUTINE dyn_nxt *** |
---|
59 | !! |
---|
60 | !! ** Purpose : Compute the after horizontal velocity from the |
---|
61 | !! momentum trend. |
---|
62 | !! |
---|
63 | !! ** Method : Apply lateral boundary conditions on the trends (ua,va) |
---|
64 | !! through calls to routine lbc_lnk. |
---|
65 | !! After velocity is compute using a leap-frog scheme environment: |
---|
66 | !! (ua,va) = (ub,vb) + 2 rdt (ua,va) |
---|
67 | !! Note that if lk_dynspg_flt=T, the time stepping has already been |
---|
68 | !! performed in dynspg module |
---|
69 | !! Time filter applied on now horizontal velocity to avoid the |
---|
70 | !! divergence of two consecutive time-steps and swap of dynamics |
---|
71 | !! arrays to start the next time step: |
---|
72 | !! (ub,vb) = (un,vn) + atfp [ (ub,vb) + (ua,va) - 2 (un,vn) ] |
---|
73 | !! (un,vn) = (ua,va) |
---|
74 | !! |
---|
75 | !! ** Action : - Update ub,vb arrays, the before horizontal velocity |
---|
76 | !! - Update un,vn arrays, the now horizontal velocity |
---|
77 | !! |
---|
78 | !!---------------------------------------------------------------------- |
---|
79 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
---|
80 | !! |
---|
81 | INTEGER :: jk ! dummy loop indices |
---|
82 | REAL(wp) :: z2dt ! temporary scalar |
---|
83 | !!---------------------------------------------------------------------- |
---|
84 | |
---|
85 | IF( kt == nit000 ) THEN |
---|
86 | IF(lwp) WRITE(numout,*) |
---|
87 | IF(lwp) WRITE(numout,*) 'dyn_nxt : time stepping' |
---|
88 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
---|
89 | ENDIF |
---|
90 | |
---|
91 | ! Local constant initialization |
---|
92 | z2dt = 2. * rdt |
---|
93 | IF( neuler == 0 .AND. kt == nit000 ) z2dt = rdt |
---|
94 | |
---|
95 | !! Explicit physics with thickness weighted updates |
---|
96 | |
---|
97 | ! Lateral boundary conditions on ( ua, va ) |
---|
98 | CALL lbc_lnk( ua, 'U', -1. ) |
---|
99 | CALL lbc_lnk( va, 'V', -1. ) |
---|
100 | |
---|
101 | ! Next velocity |
---|
102 | ! ------------- |
---|
103 | #if defined key_dynspg_flt |
---|
104 | ! Leap-frog time stepping already done in dynspg_flt.F routine |
---|
105 | #else |
---|
106 | IF( lk_vvl ) THEN ! Varying levels |
---|
107 | !RB_vvl scale factors are wrong at this point |
---|
108 | DO jk = 1, jpkm1 |
---|
109 | ua(ji,jj,jk) = ( ub(:,:,jk) * fse3u(:,:,jk) & |
---|
110 | & + z2dt * ua(:,:,jk) * fse3u(:,:,jk) ) & |
---|
111 | & / fse3u(:,:,jk) * umask(:,:,jk) |
---|
112 | va(ji,jj,jk) = ( vb(:,:,jk) * fse3v(:,:,jk) & |
---|
113 | & + z2dt * va(:,:,jk) * fse3v(:,:,jk) ) & |
---|
114 | & / fse3v(:,:,jk) * vmask(:,:,jk) |
---|
115 | END DO |
---|
116 | ELSE |
---|
117 | DO jk = 1, jpkm1 |
---|
118 | ! Leap-frog time stepping |
---|
119 | ua(:,:,jk) = ( ub(:,:,jk) + z2dt * ua(:,:,jk) ) * umask(:,:,jk) |
---|
120 | va(:,:,jk) = ( vb(:,:,jk) + z2dt * va(:,:,jk) ) * vmask(:,:,jk) |
---|
121 | END DO |
---|
122 | ENDIF |
---|
123 | |
---|
124 | # if defined key_obc |
---|
125 | ! Update (ua,va) along open boundaries (only in the rigid-lid case) |
---|
126 | CALL obc_dyn( kt ) |
---|
127 | |
---|
128 | IF ( lk_dynspg_exp .OR. lk_dynspg_ts ) THEN |
---|
129 | !Flather boundary condition : |
---|
130 | ! - Update sea surface height on each open boundary |
---|
131 | ! sshn (= after ssh) for explicit case |
---|
132 | ! sshn_b (= after ssha_b) for time-splitting case |
---|
133 | ! - Correct the barotropic velocities |
---|
134 | CALL obc_dyn_bt( kt ) |
---|
135 | |
---|
136 | !Boundary conditions on sshn ( after ssh) |
---|
137 | CALL lbc_lnk( sshn, 'T', 1. ) |
---|
138 | |
---|
139 | IF(ln_ctl) THEN ! print sum trends (used for debugging) |
---|
140 | CALL prt_ctl(tab2d_1=sshn, clinfo1=' ssh : ', mask1=tmask) |
---|
141 | ENDIF |
---|
142 | |
---|
143 | IF ( ln_vol_cst ) CALL obc_vol( kt ) |
---|
144 | |
---|
145 | ENDIF |
---|
146 | |
---|
147 | # elif defined key_bdy |
---|
148 | ! Update (ua,va) along open boundaries (for exp or ts options). |
---|
149 | IF ( lk_dynspg_exp .or. lk_dynspg_ts ) THEN |
---|
150 | |
---|
151 | CALL bdy_dyn_frs( kt ) |
---|
152 | |
---|
153 | IF ( ln_bdy_fla ) THEN |
---|
154 | |
---|
155 | ua_e(:,:)=0.0 |
---|
156 | va_e(:,:)=0.0 |
---|
157 | |
---|
158 | ! Set these variables for use in bdy_dyn_fla |
---|
159 | hu_e(:,:) = hu(:,:) |
---|
160 | hv_e(:,:) = hv(:,:) |
---|
161 | |
---|
162 | DO jk = 1, jpkm1 |
---|
163 | !! Vertically integrated momentum trends |
---|
164 | ua_e(:,:) = ua_e(:,:) + fse3u(:,:,jk) * umask(:,:,jk) * ua(:,:,jk) |
---|
165 | va_e(:,:) = va_e(:,:) + fse3v(:,:,jk) * vmask(:,:,jk) * va(:,:,jk) |
---|
166 | END DO |
---|
167 | |
---|
168 | DO jk = 1 , jpkm1 |
---|
169 | ua(:,:,jk) = ua(:,:,jk) - ua_e(:,:) * hur(:,:) |
---|
170 | va(:,:,jk) = va(:,:,jk) - va_e(:,:) * hvr(:,:) |
---|
171 | END DO |
---|
172 | |
---|
173 | CALL bdy_dta_bt( kt+1, 0) |
---|
174 | CALL bdy_dyn_fla |
---|
175 | |
---|
176 | ENDIF |
---|
177 | |
---|
178 | DO jk = 1 , jpkm1 |
---|
179 | ua(:,:,jk) = ua(:,:,jk) + ua_e(:,:) * hur(:,:) |
---|
180 | va(:,:,jk) = va(:,:,jk) + va_e(:,:) * hvr(:,:) |
---|
181 | END DO |
---|
182 | |
---|
183 | ENDIF |
---|
184 | |
---|
185 | # endif |
---|
186 | # if defined key_agrif |
---|
187 | CALL Agrif_dyn( kt ) |
---|
188 | # endif |
---|
189 | #endif |
---|
190 | |
---|
191 | ! Time filter and swap of dynamics arrays |
---|
192 | ! ------------------------------------------ |
---|
193 | IF( neuler == 0 .AND. kt == nit000 ) THEN |
---|
194 | DO jk = 1, jpkm1 |
---|
195 | ub(:,:,jk) = un(:,:,jk) |
---|
196 | vb(:,:,jk) = vn(:,:,jk) |
---|
197 | un(:,:,jk) = ua(:,:,jk) |
---|
198 | vn(:,:,jk) = va(:,:,jk) |
---|
199 | END DO |
---|
200 | ELSE |
---|
201 | IF( lk_vvl ) THEN ! Varying levels |
---|
202 | ! Not done |
---|
203 | ELSE ! Fixed levels |
---|
204 | !RB_vvl : should be done as in tranxt ? |
---|
205 | DO jk = 1, jpkm1 ! filter applied on velocities |
---|
206 | ub(:,:,jk) = atfp * ( ub(:,:,jk) + ua(:,:,jk) ) + atfp1 * un(:,:,jk) |
---|
207 | vb(:,:,jk) = atfp * ( vb(:,:,jk) + va(:,:,jk) ) + atfp1 * vn(:,:,jk) |
---|
208 | un(:,:,jk) = ua(:,:,jk) |
---|
209 | vn(:,:,jk) = va(:,:,jk) |
---|
210 | END DO |
---|
211 | ENDIF |
---|
212 | ENDIF |
---|
213 | |
---|
214 | IF(ln_ctl) THEN |
---|
215 | CALL prt_ctl(tab3d_1=un, clinfo1=' nxt - Un: ', mask1=umask, & |
---|
216 | & tab3d_2=vn, clinfo2=' Vn: ', mask2=vmask) |
---|
217 | ENDIF |
---|
218 | |
---|
219 | #if defined key_agrif |
---|
220 | IF (.NOT.Agrif_Root()) CALL Agrif_Update_Dyn( kt ) |
---|
221 | #endif |
---|
222 | |
---|
223 | END SUBROUTINE dyn_nxt |
---|
224 | |
---|
225 | !!====================================================================== |
---|
226 | END MODULE dynnxt |
---|