1 | MODULE dynldf_bilapg |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE dynldf_bilapg *** |
---|
4 | !! Ocean dynamics: lateral viscosity trend |
---|
5 | !!====================================================================== |
---|
6 | !! History : OPA ! 1997-07 (G. Madec) Original code |
---|
7 | !! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module |
---|
8 | !! 2.0 ! 2004-08 (C. Talandier) New trends organization |
---|
9 | !! 3.7 ! 2014-01 (F. Lemarie, G. Madec) restructuration/simplification of ahm specification, |
---|
10 | !! ! add velocity dependent coefficient and optional read in file |
---|
11 | !!---------------------------------------------------------------------- |
---|
12 | |
---|
13 | !!---------------------------------------------------------------------- |
---|
14 | !! dyn_ldf_blpg : update the momentum trend with the horizontal part |
---|
15 | !! of the horizontal s-coord. bilaplacian diffusion |
---|
16 | !! ldfguv : |
---|
17 | !!---------------------------------------------------------------------- |
---|
18 | USE oce ! ocean dynamics and tracers |
---|
19 | USE dom_oce ! ocean space and time domain |
---|
20 | USE ldfdyn ! lateral diffusion: eddy viscosity coef. |
---|
21 | USE zdf_oce ! ocean vertical physics |
---|
22 | USE trdmod ! ocean dynamics trends |
---|
23 | USE trdmod_oce ! ocean variables trends |
---|
24 | USE ldfslp ! iso-neutral slopes available |
---|
25 | ! |
---|
26 | USE in_out_manager ! I/O manager |
---|
27 | USE lib_mpp ! MPP library |
---|
28 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
---|
29 | USE prtctl ! Print control |
---|
30 | USE wrk_nemo ! Memory Allocation |
---|
31 | USE timing ! Timing |
---|
32 | |
---|
33 | IMPLICIT NONE |
---|
34 | PRIVATE |
---|
35 | |
---|
36 | PUBLIC dyn_ldf_blpg ! called by step.F90 |
---|
37 | |
---|
38 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: zfuw, zfvw , zdiu, zdiv ! 2D workspace (ldfguv) |
---|
39 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: zdju, zdj1u, zdjv, zdj1v ! 2D workspace (ldfguv) |
---|
40 | |
---|
41 | !! * Substitutions |
---|
42 | # include "domzgr_substitute.h90" |
---|
43 | !!---------------------------------------------------------------------- |
---|
44 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
---|
45 | !! $Id$ |
---|
46 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
---|
47 | !!---------------------------------------------------------------------- |
---|
48 | CONTAINS |
---|
49 | |
---|
50 | INTEGER FUNCTION dyn_ldf_blpg_alloc() |
---|
51 | !!---------------------------------------------------------------------- |
---|
52 | !! *** ROUTINE dyn_ldf_blpg_alloc *** |
---|
53 | !!---------------------------------------------------------------------- |
---|
54 | ALLOCATE( zfuw(jpi,jpk) , zfvw (jpi,jpk) , zdiu(jpi,jpk) , zdiv (jpi,jpk) , & |
---|
55 | & zdju(jpi,jpk) , zdj1u(jpi,jpk) , zdjv(jpi,jpk) , zdj1v(jpi,jpk) , STAT=dyn_ldf_blpg_alloc ) |
---|
56 | ! |
---|
57 | IF( dyn_ldf_blpg_alloc /= 0 ) CALL ctl_warn('dyn_ldf_blpg_alloc: failed to allocate arrays') |
---|
58 | END FUNCTION dyn_ldf_blpg_alloc |
---|
59 | |
---|
60 | |
---|
61 | SUBROUTINE dyn_ldf_blpg( kt ) |
---|
62 | !!---------------------------------------------------------------------- |
---|
63 | !! *** ROUTINE dyn_ldf_blpg *** |
---|
64 | !! |
---|
65 | !! ** Purpose : Compute the before trend of the horizontal momentum |
---|
66 | !! diffusion and add it to the general trend of momentum equation. |
---|
67 | !! |
---|
68 | !! ** Method : The lateral momentum diffusive trends is provided by a |
---|
69 | !! a 4th order operator rotated along geopotential surfaces. It is |
---|
70 | !! computed using before fields (forward in time) and geopotential |
---|
71 | !! slopes computed in routine inildf. |
---|
72 | !! -1- compute the geopotential harmonic operator applied to |
---|
73 | !! (ub,vb) and multiply it by the eddy diffusivity coefficient |
---|
74 | !! (done by a call to ldfgpu and ldfgpv routines) The result is in |
---|
75 | !! (zwk1,zwk2) arrays. Applied the domain lateral boundary conditions |
---|
76 | !! by call to lbc_lnk. |
---|
77 | !! -2- applied to (zwk1,zwk2) the geopotential harmonic operator |
---|
78 | !! by a second call to ldfgpu and ldfgpv routines respectively. The |
---|
79 | !! result is in (zwk3,zwk4) arrays. |
---|
80 | !! -3- Add this trend to the general trend (ta,sa): |
---|
81 | !! (ua,va) = (ua,va) + (zwk3,zwk4) |
---|
82 | !! 'key_trddyn' defined: the trend is saved for diagnostics. |
---|
83 | !! |
---|
84 | !! ** Action : - Update (ua,va) arrays with the before geopotential |
---|
85 | !! biharmonic mixing trend. |
---|
86 | !! - save the trend in (zwk3,zwk4) ('key_trddyn') |
---|
87 | !!---------------------------------------------------------------------- |
---|
88 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
---|
89 | ! |
---|
90 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
91 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwk1, zwk2, zwk3, zwk4 |
---|
92 | !!---------------------------------------------------------------------- |
---|
93 | ! |
---|
94 | IF( nn_timing == 1 ) CALL timing_start('dyn_ldf_blpg') |
---|
95 | ! |
---|
96 | CALL wrk_alloc( jpi, jpj, jpk, zwk1, zwk2, zwk3, zwk4 ) |
---|
97 | ! |
---|
98 | IF( kt == nit000 ) THEN |
---|
99 | IF(lwp) WRITE(numout,*) |
---|
100 | IF(lwp) WRITE(numout,*) 'dyn_ldf_blpg : horizontal biharmonic operator in s-coordinate' |
---|
101 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~' |
---|
102 | ! ! allocate dyn_ldf_blpg arrays |
---|
103 | IF( dyn_ldf_blpg_alloc() /= 0 ) CALL ctl_stop('STOP', 'dyn_ldf_blpg: failed to allocate arrays') |
---|
104 | ENDIF |
---|
105 | ! |
---|
106 | zwk1(:,:,:) = 0.e0 ; zwk3(:,:,:) = 0.e0 |
---|
107 | zwk2(:,:,:) = 0.e0 ; zwk4(:,:,:) = 0.e0 |
---|
108 | |
---|
109 | ! Laplacian of (ub,vb) multiplied by ahm |
---|
110 | ! -------------------------------------- |
---|
111 | CALL ldfguv( ub, vb, zwk1, zwk2, 1 ) ! rotated harmonic operator applied to (ub,vb) |
---|
112 | ! ! and multiply by ahmu, ahmv (output in (zwk1,zwk2) ) |
---|
113 | CALL lbc_lnk( zwk1, 'U', -1. ) ; CALL lbc_lnk( zwk2, 'V', -1. ) ! Lateral boundary conditions |
---|
114 | |
---|
115 | ! Bilaplacian of (ub,vb) |
---|
116 | ! ---------------------- |
---|
117 | CALL ldfguv( zwk1, zwk2, zwk3, zwk4, 2 ) ! rotated harmonic operator applied to (zwk1,zwk2) |
---|
118 | ! ! (output in (zwk3,zwk4) ) |
---|
119 | |
---|
120 | ! Update the momentum trends |
---|
121 | ! -------------------------- |
---|
122 | DO jj = 2, jpjm1 ! add the diffusive trend to the general momentum trends |
---|
123 | DO jk = 1, jpkm1 |
---|
124 | DO ji = 2, jpim1 |
---|
125 | ua(ji,jj,jk) = ua(ji,jj,jk) + zwk3(ji,jj,jk) |
---|
126 | va(ji,jj,jk) = va(ji,jj,jk) + zwk4(ji,jj,jk) |
---|
127 | END DO |
---|
128 | END DO |
---|
129 | END DO |
---|
130 | ! |
---|
131 | CALL wrk_dealloc( jpi, jpj, jpk, zwk1, zwk2, zwk3, zwk4 ) |
---|
132 | ! |
---|
133 | IF( nn_timing == 1 ) CALL timing_stop('dyn_ldf_blpg') |
---|
134 | ! |
---|
135 | END SUBROUTINE dyn_ldf_blpg |
---|
136 | |
---|
137 | |
---|
138 | SUBROUTINE ldfguv( pu, pv, plu, plv, kahm ) |
---|
139 | !!---------------------------------------------------------------------- |
---|
140 | !! *** ROUTINE ldfguv *** |
---|
141 | !! |
---|
142 | !! ** Purpose : Apply a geopotential harmonic operator to (pu,pv) |
---|
143 | !! (defined at u- and v-points) and multiply it by the eddy |
---|
144 | !! viscosity coefficient (if kahm=1). |
---|
145 | !! |
---|
146 | !! ** Method : The harmonic operator rotated along geopotential |
---|
147 | !! surfaces is applied to (pu,pv) using the slopes of geopotential |
---|
148 | !! surfaces computed in inildf routine. The result is provided in |
---|
149 | !! (plu,plv) arrays. It is computed in 2 stepv: |
---|
150 | !! |
---|
151 | !! First step: horizontal part of the operator. It is computed on |
---|
152 | !! ========== pu as follows (idem on pv) |
---|
153 | !! horizontal fluxes : |
---|
154 | !! zftu = ahmt ( e2u*e3u/e1u di[ pu ] - e2u*uslp dk[ mi(mk(pu)) ] ) |
---|
155 | !! zftv = ahmf ( e1v*e3v/e2v dj[ pu ] - e1v*vslp dk[ mj(mk(pu)) ] ) |
---|
156 | !! take the horizontal divergence of the fluxes (no divided by |
---|
157 | !! the volume element : |
---|
158 | !! plu = di-1[ zftu ] + dj-1[ zftv ] |
---|
159 | !! |
---|
160 | !! Second step: vertical part of the operator. It is computed on |
---|
161 | !! =========== pu as follows (idem on pv) |
---|
162 | !! vertical fluxes : |
---|
163 | !! zftw = e1e2t/e3w * (ahm*wslpi^2+ahm*wslpj^2) dk-1[ pu ] |
---|
164 | !! - e2t * ahm*wslpi di[ mi(mk(pu)) ] |
---|
165 | !! - e1t * ahm*wslpj dj[ mj(mk(pu)) ] |
---|
166 | !! take the vertical divergence of the fluxes add it to the hori- |
---|
167 | !! zontal component, divide the result by the volume element : |
---|
168 | !! plu = zsign / (e1e2t*e3t) { plu + dk[ zftw ] } |
---|
169 | !! where zsign=+1 if kahm =1 (laplacian or 1st pass of bilaplacian) |
---|
170 | !! =-1 if kahm =2 (2nd pass in case of bilaplacian) |
---|
171 | !! |
---|
172 | !! ** Action : |
---|
173 | !! plu, plv : partial harmonic operator applied to |
---|
174 | !! pu and pv (all the components except |
---|
175 | !! second order vertical derivative term) |
---|
176 | !! 'key_trddyn' defined: the trend is saved for diagnostics. |
---|
177 | !!---------------------------------------------------------------------- |
---|
178 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pu , pv ! fields on which laplacian is applied |
---|
179 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( out) :: plu, plv ! partial laplacian operator applied to |
---|
180 | ! ! pu and pv (all the components except |
---|
181 | ! ! second order vertical derivative term) |
---|
182 | INTEGER , INTENT(in ) :: kahm ! =1 1st call ; =2 2nd call |
---|
183 | ! |
---|
184 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
185 | REAL(wp) :: zabe1 , zabe2 , zcof1 , zcof2 ! local scalar |
---|
186 | REAL(wp) :: zcoef0, zcoef3, zcoef4, zsign ! - - |
---|
187 | REAL(wp) :: zbur, zbvr, zmkt, zmkf, zuav, zvav ! - - |
---|
188 | REAL(wp) :: zuwslpi, zuwslpj, zvwslpi, zvwslpj ! - - |
---|
189 | REAL(wp) :: zaht_uw, zahf_uw ! - - |
---|
190 | REAL(wp) :: zaht_vw, zahf_vw ! - - |
---|
191 | ! |
---|
192 | REAL(wp), POINTER, DIMENSION(:,:) :: ziut, zjuf, zjvt, zivf, zdku, zdk1u, zdkv, zdk1v |
---|
193 | !!---------------------------------------------------------------------- |
---|
194 | ! |
---|
195 | IF( nn_timing == 1 ) CALL timing_start('ldfguv') |
---|
196 | ! |
---|
197 | CALL wrk_alloc( jpi, jpj, ziut, zjuf, zjvt, zivf, zdku, zdk1u, zdkv, zdk1v ) |
---|
198 | ! |
---|
199 | IF ( kahm == 1 ) THEN ; zsign = +1._wp |
---|
200 | ELSEIF( kahm == 2 ) THEN ; zsign = -1._wp |
---|
201 | ELSE |
---|
202 | IF(lwp)WRITE(numout,*) ' ldfguv: kahm= 1 or 2, here =', kahm |
---|
203 | IF(lwp)WRITE(numout,*) ' We stop' |
---|
204 | STOP 'ldfguv' |
---|
205 | ENDIF |
---|
206 | ! |
---|
207 | ! ! ********** ! ! =============== |
---|
208 | DO jk = 1, jpkm1 ! First step ! ! Horizontal slab |
---|
209 | ! ! ********** ! ! =============== |
---|
210 | |
---|
211 | ! I.1 Vertical gradient of pu and pv at level jk and jk+1 |
---|
212 | ! ------------------------------------------------------- |
---|
213 | ! surface boundary condition: zdku(jk=1)=zdku(jk=2) |
---|
214 | ! zdkv(jk=1)=zdkv(jk=2) |
---|
215 | |
---|
216 | zdk1u(:,:) = ( pu(:,:,jk) - pu(:,:,jk+1) ) * umask(:,:,jk+1) |
---|
217 | zdk1v(:,:) = ( pv(:,:,jk) - pv(:,:,jk+1) ) * vmask(:,:,jk+1) |
---|
218 | |
---|
219 | IF( jk == 1 ) THEN |
---|
220 | zdku(:,:) = zdk1u(:,:) |
---|
221 | zdkv(:,:) = zdk1v(:,:) |
---|
222 | ELSE |
---|
223 | zdku(:,:) = ( pu(:,:,jk-1) - pu(:,:,jk) ) * umask(:,:,jk) |
---|
224 | zdkv(:,:) = ( pv(:,:,jk-1) - pv(:,:,jk) ) * vmask(:,:,jk) |
---|
225 | ENDIF |
---|
226 | |
---|
227 | ! -----f----- |
---|
228 | ! I.2 Horizontal fluxes on U | |
---|
229 | ! ------------------------=== t u t |
---|
230 | ! | |
---|
231 | ! i-flux at t-point -----f----- |
---|
232 | DO jj = 1, jpjm1 |
---|
233 | DO ji = 2, jpi |
---|
234 | zabe1 = e2t(ji,jj) * fse3t(ji,jj,jk) / e1t(ji,jj) |
---|
235 | ! |
---|
236 | zmkt = 1./MAX( umask(ji-1,jj,jk )+umask(ji,jj,jk+1) & |
---|
237 | & + umask(ji-1,jj,jk+1)+umask(ji,jj,jk ), 1. ) |
---|
238 | ! |
---|
239 | zcof1 = -e2t(ji,jj) * zmkt * 0.5 * ( uslp(ji-1,jj,jk) + uslp(ji,jj,jk) ) |
---|
240 | ! |
---|
241 | ziut(ji,jj) = tmask(ji,jj,jk) * ahmt(ji,jj,jk) * & |
---|
242 | & ( zabe1 * ( pu(ji,jj,jk) - pu(ji-1,jj,jk) ) & |
---|
243 | & + zcof1 * ( zdku (ji,jj) + zdk1u(ji-1,jj) & |
---|
244 | & +zdk1u(ji,jj) + zdku (ji-1,jj) ) ) |
---|
245 | END DO |
---|
246 | END DO |
---|
247 | |
---|
248 | ! j-flux at f-point |
---|
249 | DO jj = 1, jpjm1 |
---|
250 | DO ji = 1, jpim1 |
---|
251 | zabe2 = e1f(ji,jj) * fse3f(ji,jj,jk) / e2f(ji,jj) |
---|
252 | ! |
---|
253 | zmkf = 1./MAX( umask(ji,jj+1,jk )+umask(ji,jj,jk+1) & |
---|
254 | & + umask(ji,jj+1,jk+1)+umask(ji,jj,jk ), 1. ) |
---|
255 | ! |
---|
256 | zcof2 = -e1f(ji,jj) * zmkf * 0.5 * ( vslp(ji+1,jj,jk) + vslp(ji,jj,jk) ) |
---|
257 | |
---|
258 | !!gm caution here fmask multiplication already done in the def of ahmf... |
---|
259 | !!gm so in noslip.... with fmask value=2 at the coast !!!! |
---|
260 | |
---|
261 | ! |
---|
262 | zjuf(ji,jj) = fmask(ji,jj,jk) * ahmf(ji,jj,jk) * & |
---|
263 | & ( zabe2 * ( pu(ji,jj+1,jk) - pu(ji,jj,jk) ) & |
---|
264 | & + zcof2 * ( zdku (ji,jj+1) + zdk1u(ji,jj) & |
---|
265 | & +zdk1u(ji,jj+1) + zdku (ji,jj) ) ) |
---|
266 | END DO |
---|
267 | END DO |
---|
268 | |
---|
269 | ! | t | |
---|
270 | ! I.3 Horizontal fluxes on V | | |
---|
271 | ! ------------------------=== f---v---f |
---|
272 | ! | | |
---|
273 | ! i-flux at f-point | t | |
---|
274 | DO jj = 1, jpjm1 |
---|
275 | DO ji = 1, jpim1 |
---|
276 | zabe1 = e2f(ji,jj) * fse3f(ji,jj,jk) / e1f(ji,jj) |
---|
277 | ! |
---|
278 | zmkf = 1./MAX( vmask(ji+1,jj,jk )+vmask(ji,jj,jk+1) & |
---|
279 | & + vmask(ji+1,jj,jk+1)+vmask(ji,jj,jk ), 1. ) |
---|
280 | ! |
---|
281 | zcof1 = -e2f(ji,jj) * zmkf * 0.5 * ( uslp(ji,jj+1,jk) + uslp(ji,jj,jk) ) |
---|
282 | ! |
---|
283 | zivf(ji,jj) = fmask(ji,jj,jk) * ahmf(ji,jj,jk) * & |
---|
284 | & ( zabe1 * ( pu(ji+1,jj,jk) - pu(ji,jj,jk) ) & |
---|
285 | & + zcof1 * ( zdku (ji,jj) + zdk1u(ji+1,jj) & |
---|
286 | & +zdk1u(ji,jj) + zdku (ji+1,jj) ) ) |
---|
287 | END DO |
---|
288 | END DO |
---|
289 | |
---|
290 | ! j-flux at t-point |
---|
291 | DO jj = 2, jpj |
---|
292 | DO ji = 1, jpim1 |
---|
293 | zabe2 = e1t(ji,jj) * fse3t(ji,jj,jk) / e2t(ji,jj) |
---|
294 | ! |
---|
295 | zmkt = 1./MAX( vmask(ji,jj-1,jk )+vmask(ji,jj,jk+1) & |
---|
296 | & + vmask(ji,jj-1,jk+1)+vmask(ji,jj,jk ), 1. ) |
---|
297 | ! |
---|
298 | zcof2 = -e1t(ji,jj) * zmkt * 0.5 * ( vslp(ji,jj-1,jk) + vslp(ji,jj,jk) ) |
---|
299 | ! |
---|
300 | zjvt(ji,jj) = tmask(ji,jj,jk) * ahmt(ji,jj,jk) * & |
---|
301 | & ( zabe2 * ( pu(ji,jj,jk) - pu(ji,jj-1,jk) ) & |
---|
302 | & + zcof2 * ( zdku (ji,jj-1) + zdk1u(ji,jj) & |
---|
303 | & +zdk1u(ji,jj-1) + zdku (ji,jj) ) ) |
---|
304 | END DO |
---|
305 | END DO |
---|
306 | |
---|
307 | |
---|
308 | ! I.4 Second derivative (divergence) (not divided by the volume) |
---|
309 | ! --------------------- |
---|
310 | |
---|
311 | DO jj = 2, jpjm1 |
---|
312 | DO ji = 2, jpim1 |
---|
313 | plu(ji,jj,jk) = ziut (ji+1,jj) - ziut (ji,jj ) & |
---|
314 | & + zjuf (ji ,jj) - zjuf (ji,jj-1) |
---|
315 | plv(ji,jj,jk) = zivf (ji,jj ) - zivf (ji-1,jj) & |
---|
316 | & + zjvt (ji,jj+1) - zjvt (ji,jj ) |
---|
317 | END DO |
---|
318 | END DO |
---|
319 | ! ! =============== |
---|
320 | END DO ! End of slab |
---|
321 | ! ! =============== |
---|
322 | |
---|
323 | !,,,,,,,,,,,,,,,,,,,,,,,,,,,,,synchro,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, |
---|
324 | |
---|
325 | ! ! ************ ! ! =============== |
---|
326 | DO jj = 2, jpjm1 ! Second step ! ! Horizontal slab |
---|
327 | ! ! ************ ! ! =============== |
---|
328 | |
---|
329 | ! II.1 horizontal (pu,pv) gradients |
---|
330 | ! --------------------------------- |
---|
331 | |
---|
332 | DO jk = 1, jpk |
---|
333 | DO ji = 2, jpi |
---|
334 | !!gm caution here fmask multiplication already done in the def of ahmf... |
---|
335 | !!gm so in noslip.... with fmask value=2 at the coast !!!! |
---|
336 | ! ! i-gradient of u at jj |
---|
337 | zdiu (ji,jk) = tmask(ji,jj ,jk) * ( pu(ji,jj ,jk) - pu(ji-1,jj ,jk) ) |
---|
338 | ! ! j-gradient of u and v at jj |
---|
339 | zdju (ji,jk) = fmask(ji,jj ,jk) * ( pu(ji,jj+1,jk) - pu(ji ,jj ,jk) ) |
---|
340 | zdjv (ji,jk) = tmask(ji,jj ,jk) * ( pv(ji,jj ,jk) - pv(ji ,jj-1,jk) ) |
---|
341 | ! ! j-gradient of u and v at jj+1 |
---|
342 | zdj1u(ji,jk) = fmask(ji,jj-1,jk) * ( pu(ji,jj ,jk) - pu(ji ,jj-1,jk) ) |
---|
343 | zdj1v(ji,jk) = tmask(ji,jj+1,jk) * ( pv(ji,jj+1,jk) - pv(ji ,jj ,jk) ) |
---|
344 | END DO |
---|
345 | END DO |
---|
346 | DO jk = 1, jpk |
---|
347 | DO ji = 1, jpim1 ! i-gradient of v at jj |
---|
348 | zdiv (ji,jk) = fmask(ji,jj ,jk) * ( pv(ji+1,jj,jk) - pv(ji ,jj ,jk) ) |
---|
349 | END DO |
---|
350 | END DO |
---|
351 | |
---|
352 | |
---|
353 | ! II.2 Vertical fluxes |
---|
354 | ! -------------------- |
---|
355 | |
---|
356 | ! Surface and bottom vertical fluxes set to zero |
---|
357 | |
---|
358 | zfuw(:, 1 ) = 0._wp |
---|
359 | zfvw(:, 1 ) = 0._wp |
---|
360 | zfuw(:,jpk) = 0._wp |
---|
361 | zfvw(:,jpk) = 0._wp |
---|
362 | |
---|
363 | ! interior (2=<jk=<jpk-1) on pu field |
---|
364 | |
---|
365 | DO jk = 2, jpkm1 |
---|
366 | DO ji = 2, jpim1 |
---|
367 | ! i- and j-slopes at uw-point |
---|
368 | zuwslpi = 0.5 * ( wslpi(ji+1,jj,jk) + wslpi(ji,jj,jk) ) |
---|
369 | zuwslpj = 0.5 * ( wslpj(ji+1,jj,jk) + wslpj(ji,jj,jk) ) |
---|
370 | ! coef. for the vertical dirative |
---|
371 | zcoef0 = e1e2u(ji,jj) / fse3u(ji,jj,jk) & |
---|
372 | & * ( zuwslpi * zuwslpi + zuwslpj * zuwslpj ) |
---|
373 | ! weights for the i-k, j-k averaging at t- and f-points, resp. |
---|
374 | zmkt = 1./MAX( tmask(ji,jj,jk-1)+tmask(ji+1,jj,jk-1) & |
---|
375 | & + tmask(ji,jj,jk )+tmask(ji+1,jj,jk ), 1. ) |
---|
376 | !!gm caution here fmask multiplication already done in the def of ahmf... |
---|
377 | !!gm so in noslip.... with fmask value=2 at the coast !!!! |
---|
378 | zmkf = 1./MAX( fmask(ji,jj-1,jk-1)+fmask(ji,jj,jk-1) & |
---|
379 | & + fmask(ji,jj-1,jk )+fmask(ji,jj,jk ), 1. ) |
---|
380 | zaht_uw = ( ahmt(ji,jj,jk-1) + ahmt(ji+1,jj,jk-1) & |
---|
381 | & + ahmt(ji,jj,jk ) + ahmt(ji+1,jj,jk ) ) * zmkt |
---|
382 | zahf_uw = ( ahmf(ji,jj-1,jk-1) + ahmf(ji,jj,jk-1) & |
---|
383 | & + ahmf(ji,jj-1,jk ) + ahmf(ji,jj,jk ) ) * zmkf |
---|
384 | ! coef. for the horitontal derivative |
---|
385 | zcoef3 = - e2u(ji,jj) * zaht_uw * zuwslpi |
---|
386 | zcoef4 = - e1u(ji,jj) * zahf_uw * zuwslpj |
---|
387 | ! vertical flux on u field |
---|
388 | zfuw(ji,jk) = umask(ji,jj,jk) * & |
---|
389 | & ( zcoef0 * ( pu (ji,jj,jk-1) - pu (ji,jj,jk) ) & |
---|
390 | & + zcoef3 * ( zdiu (ji,jk-1) + zdiu (ji+1,jk-1) & |
---|
391 | & +zdiu (ji,jk ) + zdiu (ji+1,jk ) ) & |
---|
392 | & + zcoef4 * ( zdj1u(ji,jk-1) + zdju (ji ,jk-1) & |
---|
393 | & +zdj1u(ji,jk ) + zdju (ji ,jk ) ) ) |
---|
394 | END DO |
---|
395 | END DO |
---|
396 | |
---|
397 | ! interior (2=<jk=<jpk-1) on pv field |
---|
398 | |
---|
399 | DO jk = 2, jpkm1 |
---|
400 | DO ji = 2, jpim1 |
---|
401 | ! i- and j-slopes at vw-point |
---|
402 | zvwslpi = 0.5 * ( wslpi(ji,jj+1,jk) + wslpi(ji,jj,jk) ) |
---|
403 | zvwslpj = 0.5 * ( wslpj(ji,jj+1,jk) + wslpj(ji,jj,jk) ) |
---|
404 | ! coef. for the vertical derivative |
---|
405 | zcoef0 = e1e2v(ji,jj) / fse3v(ji,jj,jk) & |
---|
406 | & * ( zvwslpi * zvwslpi + zvwslpj * zvwslpj ) |
---|
407 | !!gm caution here fmask multiplication already done in the def of ahmf... |
---|
408 | !!gm so in noslip.... with fmask value=2 at the coast !!!! |
---|
409 | ! weights for the i-k, j-k averaging at f- and t-points, resp. |
---|
410 | zmkf = 1./MAX( fmask(ji-1,jj,jk-1)+fmask(ji,jj,jk-1) & |
---|
411 | & + fmask(ji-1,jj,jk )+fmask(ji,jj,jk ), 1. ) |
---|
412 | zmkt = 1./MAX( tmask(ji,jj,jk-1)+tmask(ji,jj+1,jk-1) & |
---|
413 | & + tmask(ji,jj,jk )+tmask(ji,jj+1,jk ), 1. ) |
---|
414 | zahf_vw = ( ahmf(ji-1,jj,jk-1) + ahmf(ji,jj,jk-1) & |
---|
415 | & + ahmf(ji-1,jj,jk ) + ahmf(ji,jj,jk ) ) * zmkf |
---|
416 | zaht_vw = ( ahmt(ji,jj,jk-1) + ahmt(ji,jj+1,jk-1) & |
---|
417 | & + ahmt(ji,jj,jk ) + ahmt(ji,jj+1,jk ) ) * zmkt |
---|
418 | ! coef. for the horizontal derivatives |
---|
419 | zcoef3 = - e2v(ji,jj) * zahf_vw * zvwslpi |
---|
420 | zcoef4 = - e1v(ji,jj) * zaht_vw * zvwslpj |
---|
421 | ! vertical flux on pv field |
---|
422 | zfvw(ji,jk) = vmask(ji,jj,jk) * & |
---|
423 | & ( zcoef0 * ( pv (ji,jj,jk-1) - pv (ji,jj,jk) ) & |
---|
424 | & + zcoef3 * ( zdiv (ji,jk-1) + zdiv (ji-1,jk-1) & |
---|
425 | & +zdiv (ji,jk ) + zdiv (ji-1,jk ) ) & |
---|
426 | & + zcoef4 * ( zdjv (ji,jk-1) + zdj1v(ji ,jk-1) & |
---|
427 | & +zdjv (ji,jk ) + zdj1v(ji ,jk ) ) ) |
---|
428 | END DO |
---|
429 | END DO |
---|
430 | |
---|
431 | |
---|
432 | ! II.3 Divergence of vertical fluxes added to the horizontal divergence |
---|
433 | ! --------------------------------------------------------------------- |
---|
434 | |
---|
435 | DO jk = 1, jpkm1 |
---|
436 | DO ji = 2, jpim1 |
---|
437 | ! vertical divergence |
---|
438 | zuav = zfuw(ji,jk) - zfuw(ji,jk+1) |
---|
439 | zvav = zfvw(ji,jk) - zfvw(ji,jk+1) |
---|
440 | ! harmonic operator applied to (pu,pv) and multiply by ahm |
---|
441 | plu(ji,jj,jk) = zsign * ( plu(ji,jj,jk) + zuav ) / ( e1e2u(ji,jj)*fse3u(ji,jj,jk) ) |
---|
442 | plv(ji,jj,jk) = zsign * ( plv(ji,jj,jk) + zvav ) / ( e1e2v(ji,jj)*fse3v(ji,jj,jk) ) |
---|
443 | END DO |
---|
444 | END DO |
---|
445 | ! ! =============== |
---|
446 | END DO ! End of slab |
---|
447 | ! ! =============== |
---|
448 | |
---|
449 | CALL wrk_dealloc( jpi, jpj, ziut, zjuf, zjvt, zivf, zdku, zdk1u, zdkv, zdk1v ) |
---|
450 | ! |
---|
451 | IF( nn_timing == 1 ) CALL timing_stop('ldfguv') |
---|
452 | ! |
---|
453 | END SUBROUTINE ldfguv |
---|
454 | |
---|
455 | !!====================================================================== |
---|
456 | END MODULE dynldf_bilapg |
---|