1 | MODULE dynkeg |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE dynkeg *** |
---|
4 | !! Ocean dynamics: kinetic energy gradient trend |
---|
5 | !!====================================================================== |
---|
6 | !! History : 1.0 ! 87-09 (P. Andrich, m.-a. Foujols) Original code |
---|
7 | !! 7.0 ! 97-05 (G. Madec) Split dynber into dynkeg and dynhpg |
---|
8 | !! 9.0 ! 02-07 (G. Madec) F90: Free form and module |
---|
9 | !!---------------------------------------------------------------------- |
---|
10 | |
---|
11 | !!---------------------------------------------------------------------- |
---|
12 | !! dyn_keg : update the momentum trend with the horizontal tke |
---|
13 | !!---------------------------------------------------------------------- |
---|
14 | USE oce ! ocean dynamics and tracers |
---|
15 | USE dom_oce ! ocean space and time domain |
---|
16 | USE trdmod ! ocean dynamics trends |
---|
17 | USE trdmod_oce ! ocean variables trends |
---|
18 | USE in_out_manager ! I/O manager |
---|
19 | USE lib_mpp ! MPP library |
---|
20 | USE prtctl ! Print control |
---|
21 | |
---|
22 | IMPLICIT NONE |
---|
23 | PRIVATE |
---|
24 | |
---|
25 | PUBLIC dyn_keg ! routine called by step module |
---|
26 | |
---|
27 | !! * Control permutation of array indices |
---|
28 | # include "oce_ftrans.h90" |
---|
29 | # include "dom_oce_ftrans.h90" |
---|
30 | |
---|
31 | !! * Substitutions |
---|
32 | # include "vectopt_loop_substitute.h90" |
---|
33 | !!---------------------------------------------------------------------- |
---|
34 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
---|
35 | !! $Id$ |
---|
36 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
---|
37 | !!---------------------------------------------------------------------- |
---|
38 | CONTAINS |
---|
39 | |
---|
40 | SUBROUTINE dyn_keg( kt ) |
---|
41 | !!---------------------------------------------------------------------- |
---|
42 | !! *** ROUTINE dyn_keg *** |
---|
43 | !! |
---|
44 | !! ** Purpose : Compute the now momentum trend due to the horizontal |
---|
45 | !! gradient of the horizontal kinetic energy and add it to the |
---|
46 | !! general momentum trend. |
---|
47 | !! |
---|
48 | !! ** Method : Compute the now horizontal kinetic energy |
---|
49 | !! zhke = 1/2 [ mi-1( un^2 ) + mj-1( vn^2 ) ] |
---|
50 | !! Take its horizontal gradient and add it to the general momentum |
---|
51 | !! trend (ua,va). |
---|
52 | !! ua = ua - 1/e1u di[ zhke ] |
---|
53 | !! va = va - 1/e2v dj[ zhke ] |
---|
54 | !! |
---|
55 | !! ** Action : - Update the (ua, va) with the hor. ke gradient trend |
---|
56 | !! - save this trends (l_trddyn=T) for post-processing |
---|
57 | !!---------------------------------------------------------------------- |
---|
58 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released |
---|
59 | USE oce , ONLY: ztrdu => ta , ztrdv => sa ! (ta,sa) used as 3D workspace |
---|
60 | USE wrk_nemo, ONLY: zhke => wrk_3d_1 ! 3D workspace |
---|
61 | !! DCSE_NEMO: need additional directives for renamed module variables |
---|
62 | !FTRANS ztrdu ztrdv zhke :I :I :z |
---|
63 | |
---|
64 | !! |
---|
65 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
---|
66 | !! |
---|
67 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
68 | REAL(wp) :: zu, zv ! temporary scalars |
---|
69 | !!---------------------------------------------------------------------- |
---|
70 | |
---|
71 | IF( wrk_in_use(3,1) ) THEN |
---|
72 | CALL ctl_stop('dyn_key: requested workspace array is unavailable') ; RETURN |
---|
73 | ENDIF |
---|
74 | |
---|
75 | IF( kt == nit000 ) THEN |
---|
76 | IF(lwp) WRITE(numout,*) |
---|
77 | IF(lwp) WRITE(numout,*) 'dyn_keg : kinetic energy gradient trend' |
---|
78 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
---|
79 | ENDIF |
---|
80 | |
---|
81 | IF( l_trddyn ) THEN ! Save ua and va trends |
---|
82 | ztrdu(:,:,:) = ua(:,:,:) |
---|
83 | ztrdv(:,:,:) = va(:,:,:) |
---|
84 | ENDIF |
---|
85 | |
---|
86 | #if defined key_z_first |
---|
87 | DO jj = 2, jpj ! Horizontal kinetic energy at T-point |
---|
88 | DO ji = 2, jpi |
---|
89 | DO jk = 1, jpkm1 |
---|
90 | zhke(ji,jj,jk) = 0.25 * ( un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
---|
91 | & + un(ji ,jj ,jk) * un(ji ,jj ,jk) & |
---|
92 | + vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
---|
93 | & + vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) |
---|
94 | END DO |
---|
95 | END DO |
---|
96 | END DO |
---|
97 | DO jj = 2, jpjm1 ! add the gradient of kinetic energy to the general momentum trends |
---|
98 | DO ji = 2, jpim1 |
---|
99 | DO jk = 1, jpkm1 |
---|
100 | ua(ji,jj,jk) = ua(ji,jj,jk) - ( zhke(ji+1,jj ,jk) - zhke(ji,jj,jk) ) / e1u(ji,jj) |
---|
101 | va(ji,jj,jk) = va(ji,jj,jk) - ( zhke(ji ,jj+1,jk) - zhke(ji,jj,jk) ) / e2v(ji,jj) |
---|
102 | END DO |
---|
103 | END DO |
---|
104 | END DO |
---|
105 | #else |
---|
106 | ! ! =============== |
---|
107 | DO jk = 1, jpkm1 ! Horizontal slab |
---|
108 | ! ! =============== |
---|
109 | DO jj = 2, jpj ! Horizontal kinetic energy at T-point |
---|
110 | DO ji = fs_2, jpi ! vector opt. |
---|
111 | zu = 0.25 * ( un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
---|
112 | & + un(ji ,jj ,jk) * un(ji ,jj ,jk) ) |
---|
113 | zv = 0.25 * ( vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
---|
114 | & + vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) |
---|
115 | zhke(ji,jj,jk) = zv + zu |
---|
116 | !!gm simplier coding ==>> ~ faster |
---|
117 | ! don't forget to suppress local zu zv scalars |
---|
118 | ! zhke(ji,jj,jk) = 0.25 * ( un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
---|
119 | ! & + un(ji ,jj ,jk) * un(ji ,jj ,jk) & |
---|
120 | ! & + vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
---|
121 | ! & + vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) |
---|
122 | !!gm end <<== |
---|
123 | END DO |
---|
124 | END DO |
---|
125 | DO jj = 2, jpjm1 ! add the gradient of kinetic energy to the general momentum trends |
---|
126 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
127 | ua(ji,jj,jk) = ua(ji,jj,jk) - ( zhke(ji+1,jj ,jk) - zhke(ji,jj,jk) ) / e1u(ji,jj) |
---|
128 | va(ji,jj,jk) = va(ji,jj,jk) - ( zhke(ji ,jj+1,jk) - zhke(ji,jj,jk) ) / e2v(ji,jj) |
---|
129 | END DO |
---|
130 | END DO |
---|
131 | !!gm idea to be tested ==>> is it faster on scalar computers ? |
---|
132 | ! DO jj = 2, jpjm1 ! add the gradient of kinetic energy to the general momentum trends |
---|
133 | ! DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
134 | ! ua(ji,jj,jk) = ua(ji,jj,jk) - 0.25 * ( + un(ji+1,jj ,jk) * un(ji+1,jj ,jk) & |
---|
135 | ! & + vn(ji+1,jj-1,jk) * vn(ji+1,jj-1,jk) & |
---|
136 | ! & + vn(ji+1,jj ,jk) * vn(ji+1,jj ,jk) & |
---|
137 | ! ! |
---|
138 | ! & - un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
---|
139 | ! & - vn(ji ,jj-1,jk) * vn(ji ,jj-1,jk) & |
---|
140 | ! & - vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) / e1u(ji,jj) |
---|
141 | ! ! |
---|
142 | ! va(ji,jj,jk) = va(ji,jj,jk) - 0.25 * ( un(ji-1,jj+1,jk) * un(ji-1,jj+1,jk) & |
---|
143 | ! & + un(ji ,jj+1,jk) * un(ji ,jj+1,jk) & |
---|
144 | ! & + vn(ji ,jj+1,jk) * vn(ji ,jj+1,jk) & |
---|
145 | ! ! |
---|
146 | ! & - un(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
---|
147 | ! & - un(ji ,jj ,jk) * un(ji ,jj ,jk) & |
---|
148 | ! & - vn(ji ,jj ,jk) * vn(ji ,jj ,jk) ) / e2v(ji,jj) |
---|
149 | ! END DO |
---|
150 | ! END DO |
---|
151 | !!gm en idea <<== |
---|
152 | ! ! =============== |
---|
153 | END DO ! End of slab |
---|
154 | ! ! =============== |
---|
155 | #endif |
---|
156 | |
---|
157 | IF( l_trddyn ) THEN ! save the Kinetic Energy trends for diagnostic |
---|
158 | ztrdu(:,:,:) = ua(:,:,:) - ztrdu(:,:,:) |
---|
159 | ztrdv(:,:,:) = va(:,:,:) - ztrdv(:,:,:) |
---|
160 | CALL trd_mod( ztrdu, ztrdv, jpdyn_trd_keg, 'DYN', kt ) |
---|
161 | ENDIF |
---|
162 | ! |
---|
163 | IF(ln_ctl) CALL prt_ctl( tab3d_1=ua, clinfo1=' keg - Ua: ', mask1=umask, & |
---|
164 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
---|
165 | ! |
---|
166 | IF( wrk_not_released(3, 1) ) CALL ctl_stop('dyn_key: failed to release workspace array') |
---|
167 | ! |
---|
168 | END SUBROUTINE dyn_keg |
---|
169 | |
---|
170 | !!====================================================================== |
---|
171 | END MODULE dynkeg |
---|