1 | MODULE trcadv_muscl |
---|
2 | !!============================================================================== |
---|
3 | !! *** MODULE trcadv_muscl *** |
---|
4 | !! Ocean passive tracers: horizontal & vertical advective trend |
---|
5 | !!============================================================================== |
---|
6 | #if defined key_passivetrc |
---|
7 | !!---------------------------------------------------------------------- |
---|
8 | !! trc_adv_muscl : update the tracer trend with the horizontal |
---|
9 | !! and vertical advection trends using MUSCL scheme |
---|
10 | !!---------------------------------------------------------------------- |
---|
11 | !! * Modules used |
---|
12 | USE oce_trc ! ocean dynamics and active tracers variables |
---|
13 | USE trc ! ocean passive tracers variables |
---|
14 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
---|
15 | USE trcbbl ! advective passive tracers in the BBL |
---|
16 | USE lib_mpp |
---|
17 | |
---|
18 | IMPLICIT NONE |
---|
19 | PRIVATE |
---|
20 | |
---|
21 | !! * Accessibility |
---|
22 | PUBLIC trc_adv_muscl ! routine called by trcstp.F90 |
---|
23 | |
---|
24 | !! * Substitutions |
---|
25 | # include "passivetrc_substitute.h90" |
---|
26 | !!---------------------------------------------------------------------- |
---|
27 | !! OPA 9.0 , LODYC-IPSL (2003) |
---|
28 | !!---------------------------------------------------------------------- |
---|
29 | |
---|
30 | CONTAINS |
---|
31 | |
---|
32 | SUBROUTINE trc_adv_muscl( kt ) |
---|
33 | !!---------------------------------------------------------------------- |
---|
34 | !! *** ROUTINE trc_adv_muscl *** |
---|
35 | !! |
---|
36 | !! ** Purpose : Compute the now trend due to total advection of any pas- |
---|
37 | !! sive tracer using a MUSCL scheme (Monotone Upstream-centered Scheme |
---|
38 | !! for Conservation Laws) and add it to the general tracer trend. |
---|
39 | !! |
---|
40 | !! ** Method : |
---|
41 | !! |
---|
42 | !! ** Action : - update tra with the now advective tracer trends |
---|
43 | !! - save trends in trtrd ('key_trc_diatrd') |
---|
44 | !! |
---|
45 | !! References : |
---|
46 | !! Estubier, A., and M. Levy, Notes Techn. Pole de Modelisation |
---|
47 | !! IPSL, Sept. 2000 (http://www.lodyc.jussieu.fr/opa) |
---|
48 | !! |
---|
49 | !! History : |
---|
50 | !! ! 06-00 (A.Estublier) for passive tracers |
---|
51 | !! 9.0 ! 03-04 (C. Ethe, G. Madec) F90: Free form and module |
---|
52 | !!---------------------------------------------------------------------- |
---|
53 | !! * modules used |
---|
54 | #if defined key_trcbbl_adv |
---|
55 | USE oce_trc , zun => ua, & ! use ua as workspace |
---|
56 | & zvn => va ! use va as workspace |
---|
57 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zwn |
---|
58 | #else |
---|
59 | USE oce_trc , zun => un, & ! When no bbl, zun == un |
---|
60 | zvn => vn, & ! zvn == vn |
---|
61 | zwn => wn ! zwn == wn |
---|
62 | #endif |
---|
63 | |
---|
64 | !! * Arguments |
---|
65 | INTEGER, INTENT( in ) :: kt ! ocean time-step |
---|
66 | |
---|
67 | !! * Local declarations |
---|
68 | INTEGER :: ji, jj, jk,jn ! dummy loop indices |
---|
69 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: & |
---|
70 | zt1, zt2, ztp1, ztp2 |
---|
71 | |
---|
72 | REAL(wp) :: zu, zv, zw, zeu, zev, zew, zbtr, ztra |
---|
73 | REAL(wp) :: z0u, z0v, z0w |
---|
74 | REAL(wp) :: zzt1, zzt2, zalpha, z2dtt |
---|
75 | #if defined key_trc_diatrd |
---|
76 | REAL(wp) :: ztai, ztaj |
---|
77 | REAL(wp) :: zfui, zfvj |
---|
78 | #endif |
---|
79 | |
---|
80 | !!---------------------------------------------------------------------- |
---|
81 | |
---|
82 | |
---|
83 | IF( kt == nittrc000 .AND. lwp ) THEN |
---|
84 | WRITE(numout,*) |
---|
85 | WRITE(numout,*) 'trc_adv : MUSCL advection scheme' |
---|
86 | WRITE(numout,*) '~~~~~~~' |
---|
87 | ENDIF |
---|
88 | |
---|
89 | |
---|
90 | |
---|
91 | #if defined key_trcbbl_adv |
---|
92 | ! Advective bottom boundary layer |
---|
93 | ! ------------------------------- |
---|
94 | zun(:,:,:) = un (:,:,:) - u_trc_bbl(:,:,:) |
---|
95 | zvn(:,:,:) = vn (:,:,:) - v_trc_bbl(:,:,:) |
---|
96 | zwn(:,:,:) = wn (:,:,:) + w_trc_bbl(:,:,:) |
---|
97 | #endif |
---|
98 | |
---|
99 | |
---|
100 | |
---|
101 | DO jn = 1, jptra |
---|
102 | |
---|
103 | ! I. Horizontal advective fluxes |
---|
104 | ! ------------------------------ |
---|
105 | |
---|
106 | ! first guess of the slopes |
---|
107 | ! interior values |
---|
108 | DO jk = 1, jpkm1 |
---|
109 | DO jj = 1, jpjm1 |
---|
110 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
111 | zt1(ji,jj,jk) = umask(ji,jj,jk) * ( trb(ji+1,jj,jk,jn) - trb(ji,jj,jk,jn) ) |
---|
112 | zt2(ji,jj,jk) = vmask(ji,jj,jk) * ( trb(ji,jj+1,jk,jn) - trb(ji,jj,jk,jn) ) |
---|
113 | END DO |
---|
114 | END DO |
---|
115 | END DO |
---|
116 | ! bottom values |
---|
117 | zt1(:,:,jpk) = 0.e0 |
---|
118 | zt2(:,:,jpk) = 0.e0 |
---|
119 | |
---|
120 | ! lateral boundary conditions on zt1, zt2 |
---|
121 | CALL lbc_lnk( zt1, 'U', -1. ) |
---|
122 | CALL lbc_lnk( zt2, 'V', -1. ) |
---|
123 | |
---|
124 | |
---|
125 | ! Slopes |
---|
126 | ! interior values |
---|
127 | DO jk = 1, jpkm1 |
---|
128 | DO jj = 2, jpj |
---|
129 | DO ji = fs_2, jpi ! vector opt. |
---|
130 | ztp1(ji,jj,jk) = ( zt1(ji,jj,jk) + zt1(ji-1,jj ,jk) ) & |
---|
131 | & * ( 0.25 + SIGN( 0.25, zt1(ji,jj,jk) * zt1(ji-1,jj ,jk) ) ) |
---|
132 | ztp2(ji,jj,jk) = ( zt2(ji,jj,jk) + zt2(ji ,jj-1,jk) ) & |
---|
133 | & * ( 0.25 + SIGN( 0.25, zt2(ji,jj,jk) * zt2(ji ,jj-1,jk) ) ) |
---|
134 | END DO |
---|
135 | END DO |
---|
136 | END DO |
---|
137 | ! bottom values |
---|
138 | ztp1(:,:,jpk) = 0.e0 |
---|
139 | ztp2(:,:,jpk) = 0.e0 |
---|
140 | |
---|
141 | ! Slopes limitation |
---|
142 | DO jk = 1, jpkm1 |
---|
143 | DO jj = 2, jpj |
---|
144 | DO ji = fs_2, jpi ! vector opt. |
---|
145 | ztp1(ji,jj,jk) = SIGN( 1., ztp1(ji,jj,jk) ) & |
---|
146 | & * MIN( ABS( ztp1(ji ,jj,jk) ), & |
---|
147 | & 2.*ABS( zt1 (ji-1,jj,jk) ), & |
---|
148 | & 2.*ABS( zt1 (ji ,jj,jk) ) ) |
---|
149 | |
---|
150 | ztp2(ji,jj,jk) = SIGN( 1., ztp2(ji,jj,jk) ) & |
---|
151 | & * MIN( ABS( ztp2(ji,jj ,jk) ), & |
---|
152 | & 2.*ABS( zt2 (ji,jj-1,jk) ), & |
---|
153 | & 2.*ABS( zt2 (ji,jj ,jk) ) ) |
---|
154 | |
---|
155 | END DO |
---|
156 | END DO |
---|
157 | END DO |
---|
158 | |
---|
159 | ! Advection terms |
---|
160 | ! interior values |
---|
161 | DO jk = 1, jpkm1 |
---|
162 | DO jj = 2, jpjm1 |
---|
163 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
164 | ! volume fluxes |
---|
165 | #if defined key_s_coord || defined key_partial_steps |
---|
166 | zeu = e2u(ji,jj) * fse3u(ji,jj,jk) * zun(ji,jj,jk) |
---|
167 | zev = e1v(ji,jj) * fse3v(ji,jj,jk) * zvn(ji,jj,jk) |
---|
168 | #else |
---|
169 | zeu = e2u(ji,jj) * zun(ji,jj,jk) |
---|
170 | zev = e1v(ji,jj) * zvn(ji,jj,jk) |
---|
171 | #endif |
---|
172 | ! MUSCL fluxes |
---|
173 | z2dtt = rdttra(jk) * FLOAT(ndttrc) |
---|
174 | z0u = SIGN( 0.5, zun(ji,jj,jk) ) |
---|
175 | zalpha = 0.5 - z0u |
---|
176 | zu = z0u - 0.5 * zun(ji,jj,jk) * z2dtt / e1u(ji,jj) |
---|
177 | zzt1 = trb(ji+1,jj,jk,jn) + zu*ztp1(ji+1,jj,jk) |
---|
178 | zzt2 = trb(ji ,jj,jk,jn) + zu*ztp1(ji ,jj,jk) |
---|
179 | zt1(ji,jj,jk) = zeu * ( zalpha * zzt1 + (1.-zalpha) * zzt2 ) |
---|
180 | z0v = SIGN( 0.5, zvn(ji,jj,jk) ) |
---|
181 | zalpha = 0.5 - z0v |
---|
182 | zv = z0v - 0.5 * zvn(ji,jj,jk) * z2dtt / e2v(ji,jj) |
---|
183 | zzt1 = trb(ji,jj+1,jk,jn) + zv*ztp2(ji,jj+1,jk) |
---|
184 | zzt2 = trb(ji,jj ,jk,jn) + zv*ztp2(ji,jj ,jk) |
---|
185 | zt2(ji,jj,jk) = zev * ( zalpha * zzt1 + (1.-zalpha) * zzt2 ) |
---|
186 | END DO |
---|
187 | END DO |
---|
188 | END DO |
---|
189 | |
---|
190 | ! lateral boundary conditions on zt1, zt2 (changed sign) |
---|
191 | CALL lbc_lnk( zt1, 'U', -1. ) |
---|
192 | CALL lbc_lnk( zt2, 'V', -1. ) |
---|
193 | |
---|
194 | ! Compute and add the horizontal advective trend |
---|
195 | |
---|
196 | DO jk = 1, jpkm1 |
---|
197 | DO jj = 2, jpjm1 |
---|
198 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
199 | #if defined key_s_coord || defined key_partial_steps |
---|
200 | zbtr = 1. / ( e1t(ji,jj)*e2t(ji,jj)*fse3t(ji,jj,jk) ) |
---|
201 | #else |
---|
202 | zbtr = 1. / ( e1t(ji,jj)*e2t(ji,jj) ) |
---|
203 | #endif |
---|
204 | ! horizontal advective trends |
---|
205 | ztra = - zbtr * ( zt1(ji,jj,jk) - zt1(ji-1,jj ,jk ) & |
---|
206 | & + zt2(ji,jj,jk) - zt2(ji ,jj-1,jk ) ) |
---|
207 | ! add it to the general tracer trends |
---|
208 | tra(ji,jj,jk,jn) = tra(ji,jj,jk,jn) + ztra |
---|
209 | #if defined key_trc_diatrd |
---|
210 | ! recompute the trends in i- and j-direction as Uh gradh(T) |
---|
211 | # if defined key_s_coord || defined key_partial_steps |
---|
212 | zfui = e2u(ji ,jj) * fse3u(ji, jj,jk) * un(ji, jj,jk) & |
---|
213 | & - e2u(ji-1,jj) * fse3u(ji-1,jj,jk) * un(ji-1,jj,jk) |
---|
214 | zfvj = e1v(ji,jj ) * fse3v(ji,jj ,jk) * vn(ji,jj ,jk) & |
---|
215 | & - e1v(ji,jj-1) * fse3v(ji,jj-1,jk) * vn(ji,jj-1,jk) |
---|
216 | # else |
---|
217 | zfui = e2u(ji ,jj) * un(ji, jj,jk) & |
---|
218 | & - e2u(ji-1,jj) * un(ji-1,jj,jk) |
---|
219 | zfvj = e1v(ji,jj ) * vn(ji,jj ,jk) & |
---|
220 | & - e1v(ji,jj-1) * vn(ji,jj-1,jk) |
---|
221 | # endif |
---|
222 | ztai =-zbtr * ( zt1(ji,jj,jk) - zt1(ji-1,jj ,jk) - trn(ji,jj,jk,jn) * zfui ) |
---|
223 | ztaj =-zbtr * ( zt2(ji,jj,jk) - zt2(ji ,jj-1,jk) - trn(ji,jj,jk,jn) * zfvj ) |
---|
224 | ! save i- and j- advective trends computed as Uh gradh(T) |
---|
225 | trtrd(ji,jj,jk,jn,1) = ztai |
---|
226 | trtrd(ji,jj,jk,jn,2) = ztaj |
---|
227 | #endif |
---|
228 | END DO |
---|
229 | END DO |
---|
230 | END DO |
---|
231 | |
---|
232 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
---|
233 | ztra = SUM( tra(2:nictle,2:njctle,1:jpkm1,jn) * tmask(2:nictle,2:njctle,1:jpkm1) ) |
---|
234 | WRITE(numout,*) ' trc/had - ',ctrcnm(jn),' : ', ztra-tra_ctl(jn), ' muscl' |
---|
235 | tra_ctl(jn) = ztra |
---|
236 | ENDIF |
---|
237 | |
---|
238 | ! II. Vertical advective fluxes |
---|
239 | ! ----------------------------- |
---|
240 | |
---|
241 | ! First guess of the slope |
---|
242 | ! interior values |
---|
243 | DO jk = 2, jpkm1 |
---|
244 | zt1(:,:,jk) = tmask(:,:,jk) * ( trb(:,:,jk-1,jn) - trb(:,:,jk,jn) ) |
---|
245 | END DO |
---|
246 | ! surface and bottom boundary conditions |
---|
247 | zt1 (:,:, 1 ) = 0.e0 |
---|
248 | zt1 (:,:,jpk) = 0.e0 |
---|
249 | ! Slopes |
---|
250 | DO jk = 2, jpkm1 |
---|
251 | DO jj = 1, jpj |
---|
252 | DO ji = 1, jpi |
---|
253 | ztp1(ji,jj,jk) = ( zt1(ji,jj,jk) + zt1(ji,jj,jk+1) ) & |
---|
254 | & * ( 0.25 + SIGN( 0.25, zt1(ji,jj,jk) * zt1(ji,jj,jk+1) ) ) |
---|
255 | END DO |
---|
256 | END DO |
---|
257 | END DO |
---|
258 | |
---|
259 | ! Slopes limitation |
---|
260 | ! interior values |
---|
261 | DO jk = 2, jpkm1 |
---|
262 | DO jj = 1, jpj |
---|
263 | DO ji = 1, jpi |
---|
264 | ztp1(ji,jj,jk) = SIGN( 1., ztp1(ji,jj,jk) ) & |
---|
265 | & * MIN( ABS( ztp1(ji,jj,jk ) ), & |
---|
266 | & 2.*ABS( zt1 (ji,jj,jk+1) ), & |
---|
267 | & 2.*ABS( zt1 (ji,jj,jk ) ) ) |
---|
268 | END DO |
---|
269 | END DO |
---|
270 | END DO |
---|
271 | ! surface values |
---|
272 | ztp1(:,:,1) = 0. |
---|
273 | ! vertical advective flux |
---|
274 | ! interior values |
---|
275 | DO jk = 1, jpkm1 |
---|
276 | DO jj = 2, jpjm1 |
---|
277 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
278 | z2dtt = rdttra(jk) * FLOAT(ndttrc) |
---|
279 | zew = zwn(ji,jj,jk+1) |
---|
280 | z0w = SIGN( 0.5, zwn(ji,jj,jk+1) ) |
---|
281 | zalpha = 0.5 + z0w |
---|
282 | zw = z0w - 0.5 * zwn(ji,jj,jk+1)*z2dtt / fse3w(ji,jj,jk+1) |
---|
283 | zzt1 = trb(ji,jj,jk+1,jn) + zw*ztp1(ji,jj,jk+1) |
---|
284 | zzt2 = trb(ji,jj,jk ,jn) + zw*ztp1(ji,jj,jk ) |
---|
285 | zt1(ji,jj,jk+1) = zew * ( zalpha * zzt1 + (1.-zalpha)*zzt2 ) |
---|
286 | END DO |
---|
287 | END DO |
---|
288 | END DO |
---|
289 | ! surface values |
---|
290 | IF( lk_dynspg_fsc .OR. lk_dynspg_fsc_tsk ) THEN ! free surface-constant volume |
---|
291 | zt1(:,:, 1 ) = zwn(:,:,1) * trb(:,:,1,jn) |
---|
292 | ELSE ! rigid lid : flux set to zero |
---|
293 | zt1(:,:, 1 ) = 0.e0 |
---|
294 | ENDIF |
---|
295 | |
---|
296 | ! bottom values |
---|
297 | zt1(:,:,jpk) = 0.e0 |
---|
298 | |
---|
299 | ! Compute & add the vertical advective trend |
---|
300 | |
---|
301 | DO jk = 1, jpkm1 |
---|
302 | DO jj = 2, jpjm1 |
---|
303 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
304 | zbtr = 1. / fse3t(ji,jj,jk) |
---|
305 | ! horizontal advective trends |
---|
306 | ztra = - zbtr * ( zt1(ji,jj,jk) - zt1(ji,jj,jk+1) ) |
---|
307 | ! add it to the general tracer trends |
---|
308 | tra(ji,jj,jk,jn) = tra(ji,jj,jk,jn) + ztra |
---|
309 | #if defined key_trc_diatrd |
---|
310 | ! save the vertical advective trends computed as w gradz(T) |
---|
311 | trtrd(ji,jj,jk,jn,3) = ztra - trn(ji,jj,jk,jn) * hdivn(ji,jj,jk) |
---|
312 | #endif |
---|
313 | END DO |
---|
314 | END DO |
---|
315 | END DO |
---|
316 | |
---|
317 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
---|
318 | ztra = SUM( tra(2:nictle,2:njctle,1:jpkm1,jn) * tmask(2:nictle,2:njctle,1:jpkm1) ) |
---|
319 | WRITE(numout,*) ' trc/zad - ',ctrcnm(jn),' : ', ztra-tra_ctl(jn), ' muscl' |
---|
320 | tra_ctl(jn) = ztra |
---|
321 | ENDIF |
---|
322 | |
---|
323 | END DO |
---|
324 | |
---|
325 | END SUBROUTINE trc_adv_muscl |
---|
326 | |
---|
327 | #else |
---|
328 | !!---------------------------------------------------------------------- |
---|
329 | !! Default option Empty module |
---|
330 | !!---------------------------------------------------------------------- |
---|
331 | CONTAINS |
---|
332 | SUBROUTINE trc_adv_muscl( kt ) |
---|
333 | INTEGER, INTENT(in) :: kt |
---|
334 | WRITE(*,*) 'trc_adv_muscl: You should not have seen this print! error?', kt |
---|
335 | END SUBROUTINE trc_adv_muscl |
---|
336 | #endif |
---|
337 | |
---|
338 | !!====================================================================== |
---|
339 | END MODULE trcadv_muscl |
---|