1 | MODULE obctra |
---|
2 | !!================================================================================= |
---|
3 | !! *** MODULE obctra *** |
---|
4 | !! Ocean tracers: Radiation of tracers on each open boundary |
---|
5 | !!================================================================================= |
---|
6 | #if defined key_obc |
---|
7 | !!--------------------------------------------------------------------------------- |
---|
8 | !! 'key_obc' : Open Boundary Conditions |
---|
9 | !!--------------------------------------------------------------------------------- |
---|
10 | !! obc_tra : call the subroutine for each open boundary |
---|
11 | !! obc_tra_east : radiation of the east open boundary tracers |
---|
12 | !! obc_tra_west : radiation of the west open boundary tracers |
---|
13 | !! obc_tra_north : radiation of the north open boundary tracers |
---|
14 | !! obc_tra_south : radiation of the south open boundary tracers |
---|
15 | !!---------------------------------------------------------------------------------- |
---|
16 | !! * Modules used |
---|
17 | USE oce ! ocean dynamics and tracers variables |
---|
18 | USE dom_oce ! ocean space and time domain variables |
---|
19 | USE phycst ! physical constants |
---|
20 | USE obc_oce ! ocean open boundary conditions |
---|
21 | USE lib_mpp ! ??? |
---|
22 | USE lbclnk ! ??? |
---|
23 | USE in_out_manager ! I/O manager |
---|
24 | |
---|
25 | IMPLICIT NONE |
---|
26 | PRIVATE |
---|
27 | |
---|
28 | !! * Accessibility |
---|
29 | PUBLIC obc_tra ! routine called in tranxt.F90 |
---|
30 | |
---|
31 | !! * Module variables |
---|
32 | INTEGER :: & ! ... boundary space indices |
---|
33 | nib = 1, & ! nib = boundary point |
---|
34 | nibm = 2, & ! nibm = 1st interior point |
---|
35 | nibm2 = 3, & ! nibm2 = 2nd interior point |
---|
36 | ! ... boundary time indices |
---|
37 | nit = 1, & ! nit = now |
---|
38 | nitm = 2, & ! nitm = before |
---|
39 | nitm2 = 3 ! nitm2 = before-before |
---|
40 | |
---|
41 | REAL(wp) :: & |
---|
42 | rtaue , rtauw , rtaun , rtaus , & ! Boundary restoring coefficient |
---|
43 | rtauein, rtauwin, rtaunin, rtausin ! Boundary restoring coefficient for inflow |
---|
44 | |
---|
45 | !! * Substitutions |
---|
46 | # include "obc_vectopt_loop_substitute.h90" |
---|
47 | !!--------------------------------------------------------------------------------- |
---|
48 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
---|
49 | !! $Id$ |
---|
50 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
---|
51 | !!--------------------------------------------------------------------------------- |
---|
52 | |
---|
53 | CONTAINS |
---|
54 | |
---|
55 | SUBROUTINE obc_tra( kt ) |
---|
56 | !!------------------------------------------------------------------------------- |
---|
57 | !! *** SUBROUTINE obc_tra *** |
---|
58 | !! |
---|
59 | !! ** Purpose : Compute tracer fields (t,s) along the open boundaries. |
---|
60 | !! This routine is called by the tranxt.F routine and updates ta,sa |
---|
61 | !! which are the actual temperature and salinity fields. |
---|
62 | !! The logical variable lp_obc_east, and/or lp_obc_west, and/or lp_obc_north, |
---|
63 | !! and/or lp_obc_south allow the user to determine which boundary is an |
---|
64 | !! open one (must be done in the param_obc.h90 file). |
---|
65 | !! |
---|
66 | !! Reference : |
---|
67 | !! Marchesiello P., 1995, these de l'universite J. Fourier, Grenoble, France. |
---|
68 | !! |
---|
69 | !! History : |
---|
70 | !! ! 95-03 (J.-M. Molines) Original, SPEM |
---|
71 | !! ! 97-07 (G. Madec, J.-M. Molines) addition |
---|
72 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
---|
73 | !!---------------------------------------------------------------------- |
---|
74 | !! * Arguments |
---|
75 | INTEGER, INTENT( in ) :: kt |
---|
76 | !!---------------------------------------------------------------------- |
---|
77 | |
---|
78 | ! 0. Local constant initialization |
---|
79 | |
---|
80 | IF( kt == nit000 .OR. ln_rstart) THEN |
---|
81 | ! ... Boundary restoring coefficient |
---|
82 | rtaue = 2. * rdt / rdpeob |
---|
83 | rtauw = 2. * rdt / rdpwob |
---|
84 | rtaun = 2. * rdt / rdpnob |
---|
85 | rtaus = 2. * rdt / rdpsob |
---|
86 | ! ... Boundary restoring coefficient for inflow ( all boundaries) |
---|
87 | rtauein = 2. * rdt / rdpein |
---|
88 | rtauwin = 2. * rdt / rdpwin |
---|
89 | rtaunin = 2. * rdt / rdpnin |
---|
90 | rtausin = 2. * rdt / rdpsin |
---|
91 | END IF |
---|
92 | |
---|
93 | IF( lp_obc_east ) CALL obc_tra_east ( kt ) ! East open boundary |
---|
94 | |
---|
95 | IF( lp_obc_west ) CALL obc_tra_west ( kt ) ! West open boundary |
---|
96 | |
---|
97 | IF( lp_obc_north ) CALL obc_tra_north( kt ) ! North open boundary |
---|
98 | |
---|
99 | IF( lp_obc_south ) CALL obc_tra_south( kt ) ! South open boundary |
---|
100 | |
---|
101 | IF( lk_mpp ) THEN !!bug ??? |
---|
102 | IF( kt >= nit000+3 .AND. ln_rstart ) THEN |
---|
103 | CALL lbc_lnk( tb, 'T', 1. ) |
---|
104 | CALL lbc_lnk( sb, 'T', 1. ) |
---|
105 | END IF |
---|
106 | CALL lbc_lnk( ta, 'T', 1. ) |
---|
107 | CALL lbc_lnk( sa, 'T', 1. ) |
---|
108 | ENDIF |
---|
109 | |
---|
110 | END SUBROUTINE obc_tra |
---|
111 | |
---|
112 | |
---|
113 | SUBROUTINE obc_tra_east ( kt ) |
---|
114 | !!------------------------------------------------------------------------------ |
---|
115 | !! *** SUBROUTINE obc_tra_east *** |
---|
116 | !! |
---|
117 | !! ** Purpose : |
---|
118 | !! Apply the radiation algorithm on east OBC tracers ta, sa using the |
---|
119 | !! phase velocities calculated in obc_rad_east subroutine in obcrad.F90 module |
---|
120 | !! If the logical lfbceast is .TRUE., there is no radiation but only fixed OBC |
---|
121 | !! |
---|
122 | !! History : |
---|
123 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
---|
124 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
---|
125 | !! ! 97-12 (M. Imbard) Mpp adaptation |
---|
126 | !! ! 00-06 (J.-M. Molines) |
---|
127 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
---|
128 | !!------------------------------------------------------------------------------ |
---|
129 | !! * Arguments |
---|
130 | INTEGER, INTENT( in ) :: kt |
---|
131 | |
---|
132 | !! * Local declaration |
---|
133 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
134 | REAL(wp) :: z05cx, ztau, zin |
---|
135 | !!------------------------------------------------------------------------------ |
---|
136 | |
---|
137 | ! 1. First three time steps and more if lfbceast is .TRUE. |
---|
138 | ! In that case open boundary conditions are FIXED. |
---|
139 | ! -------------------------------------------------------- |
---|
140 | |
---|
141 | IF( ( kt < nit000+3 .AND. .NOT.ln_rstart ) .OR. lfbceast ) THEN |
---|
142 | DO ji = fs_nie0+1, fs_nie1+1 ! Vector opt. |
---|
143 | DO jk = 1, jpkm1 |
---|
144 | DO jj = 1, jpj |
---|
145 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
---|
146 | tfoe(jj,jk)*temsk(jj,jk) |
---|
147 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
---|
148 | sfoe(jj,jk)*temsk(jj,jk) |
---|
149 | END DO |
---|
150 | END DO |
---|
151 | END DO |
---|
152 | |
---|
153 | ELSE |
---|
154 | |
---|
155 | ! 2. Beyond the fourth time step if lfbceast is .FALSE. |
---|
156 | ! ----------------------------------------------------- |
---|
157 | |
---|
158 | ! Temperature and salinity radiation |
---|
159 | ! ---------------------------------- |
---|
160 | ! |
---|
161 | ! nibm2 nibm nib |
---|
162 | ! | nibm | nib///|/// |
---|
163 | ! | | | |////|/// |
---|
164 | ! jj line --v----f----v----f----v--- |
---|
165 | ! | | | |////|/// |
---|
166 | ! | |/// // |
---|
167 | ! jj line T u T u/// T // |
---|
168 | ! | |/// // |
---|
169 | ! | | | |////|/// |
---|
170 | ! jj-1 line --v----f----v----f----v--- |
---|
171 | ! | | | |////|/// |
---|
172 | ! jpieob-1 jpieob / /// |
---|
173 | ! | | | |
---|
174 | ! jpieob-1 jpieob jpieob+1 |
---|
175 | ! |
---|
176 | ! ... radiative conditions + relaxation toward a climatology |
---|
177 | ! the phase velocity is taken as the phase velocity of the tangen- |
---|
178 | ! tial velocity (here vn), which have been saved in (u_cxebnd,v_cxebnd) |
---|
179 | ! ... (jpjedp1, jpjefm1), jpieob+1 |
---|
180 | DO ji = fs_nie0+1, fs_nie1+1 ! Vector opt. |
---|
181 | DO jk = 1, jpkm1 |
---|
182 | DO jj = 2, jpjm1 |
---|
183 | ! ... i-phase speed ratio (from averaged of v_cxebnd) |
---|
184 | z05cx = ( 0.5 * ( v_cxebnd(jj,jk) + v_cxebnd(jj-1,jk) ) ) / e1t(ji-1,jj) |
---|
185 | z05cx = min( z05cx, 1. ) |
---|
186 | ! ... z05cx=< 0, inflow zin=0, ztau=1 |
---|
187 | ! > 0, outflow zin=1, ztau=rtaue |
---|
188 | zin = sign( 1., z05cx ) |
---|
189 | zin = 0.5*( zin + abs(zin) ) |
---|
190 | ! ... for inflow rtauein is used for relaxation coefficient else rtaue |
---|
191 | ztau = (1.-zin ) * rtauein + zin * rtaue |
---|
192 | z05cx = z05cx * zin |
---|
193 | ! ... update ( ta, sa ) with radiative or climatological (t, s) |
---|
194 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
---|
195 | temsk(jj,jk) * ( ( 1. - z05cx - ztau ) & |
---|
196 | * tebnd(jj,jk,nib ,nitm) + 2.*z05cx & |
---|
197 | * tebnd(jj,jk,nibm,nit ) + ztau * tfoe (jj,jk) ) & |
---|
198 | / (1. + z05cx) |
---|
199 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
---|
200 | temsk(jj,jk) * ( ( 1. - z05cx - ztau ) & |
---|
201 | * sebnd(jj,jk,nib ,nitm) + 2.*z05cx & |
---|
202 | * sebnd(jj,jk,nibm,nit ) + ztau * sfoe (jj,jk) ) & |
---|
203 | / (1. + z05cx) |
---|
204 | END DO |
---|
205 | END DO |
---|
206 | END DO |
---|
207 | |
---|
208 | END IF |
---|
209 | |
---|
210 | END SUBROUTINE obc_tra_east |
---|
211 | |
---|
212 | |
---|
213 | SUBROUTINE obc_tra_west ( kt ) |
---|
214 | !!------------------------------------------------------------------------------ |
---|
215 | !! *** SUBROUTINE obc_tra_west *** |
---|
216 | !! |
---|
217 | !! ** Purpose : |
---|
218 | !! Apply the radiation algorithm on west OBC tracers ta, sa using the |
---|
219 | !! phase velocities calculated in obc_rad_west subroutine in obcrad.F90 module |
---|
220 | !! If the logical lfbcwest is .TRUE., there is no radiation but only fixed OBC |
---|
221 | !! |
---|
222 | !! History : |
---|
223 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
---|
224 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
---|
225 | !! ! 97-12 (M. Imbard) Mpp adaptation |
---|
226 | !! ! 00-06 (J.-M. Molines) |
---|
227 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
---|
228 | !!------------------------------------------------------------------------------ |
---|
229 | !! * Arguments |
---|
230 | INTEGER, INTENT( in ) :: kt |
---|
231 | |
---|
232 | !! * Local declaration |
---|
233 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
234 | REAL(wp) :: z05cx, ztau, zin |
---|
235 | !!------------------------------------------------------------------------------ |
---|
236 | |
---|
237 | ! 1. First three time steps and more if lfbcwest is .TRUE. |
---|
238 | ! In that case open boundary conditions are FIXED. |
---|
239 | ! -------------------------------------------------------- |
---|
240 | |
---|
241 | IF( ( kt < nit000+3 .AND. .NOT.ln_rstart ) .OR. lfbcwest ) THEN |
---|
242 | |
---|
243 | DO ji = fs_niw0, fs_niw1 ! Vector opt. |
---|
244 | DO jk = 1, jpkm1 |
---|
245 | DO jj = 1, jpj |
---|
246 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
---|
247 | tfow(jj,jk)*twmsk(jj,jk) |
---|
248 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
---|
249 | sfow(jj,jk)*twmsk(jj,jk) |
---|
250 | END DO |
---|
251 | END DO |
---|
252 | END DO |
---|
253 | |
---|
254 | ELSE |
---|
255 | |
---|
256 | ! 2. Beyond the fourth time step if lfbcwest is .FALSE. |
---|
257 | ! ----------------------------------------------------- |
---|
258 | |
---|
259 | ! Temperature and salinity radiation |
---|
260 | ! ---------------------------------- |
---|
261 | ! |
---|
262 | ! nib nibm nibm2 |
---|
263 | ! nib///| nibm | nibm2 | |
---|
264 | ! ///|////| | | | | |
---|
265 | ! ---v----f----v----f----v----f-- jj line |
---|
266 | ! ///|////| | | | | |
---|
267 | ! // ///| | | |
---|
268 | ! // T ///u T u T u jj line |
---|
269 | ! // ///| | | |
---|
270 | ! ///|////| | | | | |
---|
271 | ! ---v----f----v----f----v----f-- jj-1 line |
---|
272 | ! ///|////| | | | | |
---|
273 | ! jpiwob jpiwob+1 jpiwob+2 |
---|
274 | ! | | | |
---|
275 | ! jpiwob jpiwob+1 jpiwob+2 |
---|
276 | ! |
---|
277 | ! ... radiative conditions + relaxation toward a climatology |
---|
278 | ! ... the phase velocity is taken as the phase velocity of the tangen- |
---|
279 | ! ... tial velocity (here vn), which have been saved in (v_cxwbnd) |
---|
280 | DO ji = fs_niw0, fs_niw1 ! Vector opt. |
---|
281 | DO jk = 1, jpkm1 |
---|
282 | DO jj = 2, jpjm1 |
---|
283 | ! ... i-phase speed ratio (from averaged of v_cxwbnd) |
---|
284 | z05cx = ( 0.5 * ( v_cxwbnd(jj,jk) + v_cxwbnd(jj-1,jk) ) ) / e1t(ji+1,jj) |
---|
285 | z05cx = max( z05cx, -1. ) |
---|
286 | ! ... z05cx > 0, inflow zin=0, ztau=1 |
---|
287 | ! < 0, outflow zin=1, ztau=rtauw |
---|
288 | zin = sign( 1., -1.* z05cx ) |
---|
289 | zin = 0.5*( zin + abs(zin) ) |
---|
290 | ztau = (1.-zin )*rtauwin + zin * rtauw |
---|
291 | z05cx = z05cx * zin |
---|
292 | ! ... update (ta,sa) with radiative or climatological (t, s) |
---|
293 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
---|
294 | twmsk(jj,jk) * ( ( 1. + z05cx - ztau ) & |
---|
295 | * twbnd(jj,jk,nib ,nitm) - 2.*z05cx & |
---|
296 | * twbnd(jj,jk,nibm,nit ) + ztau * tfow (jj,jk) ) & |
---|
297 | / (1. - z05cx) |
---|
298 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
---|
299 | twmsk(jj,jk) * ( ( 1. + z05cx - ztau ) & |
---|
300 | * swbnd(jj,jk,nib ,nitm) - 2.*z05cx & |
---|
301 | * swbnd(jj,jk,nibm,nit ) + ztau * sfow (jj,jk) ) & |
---|
302 | / (1. - z05cx) |
---|
303 | END DO |
---|
304 | END DO |
---|
305 | END DO |
---|
306 | |
---|
307 | END IF |
---|
308 | |
---|
309 | END SUBROUTINE obc_tra_west |
---|
310 | |
---|
311 | |
---|
312 | SUBROUTINE obc_tra_north ( kt ) |
---|
313 | !!------------------------------------------------------------------------------ |
---|
314 | !! *** SUBROUTINE obc_tra_north *** |
---|
315 | !! |
---|
316 | !! ** Purpose : |
---|
317 | !! Apply the radiation algorithm on north OBC tracers ta, sa using the |
---|
318 | !! phase velocities calculated in obc_rad_north subroutine in obcrad.F90 module |
---|
319 | !! If the logical lfbcnorth is .TRUE., there is no radiation but only fixed OBC |
---|
320 | !! |
---|
321 | !! History : |
---|
322 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
---|
323 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
---|
324 | !! ! 97-12 (M. Imbard) Mpp adaptation |
---|
325 | !! ! 00-06 (J.-M. Molines) |
---|
326 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
---|
327 | !!------------------------------------------------------------------------------ |
---|
328 | !! * Arguments |
---|
329 | INTEGER, INTENT( in ) :: kt |
---|
330 | |
---|
331 | !! * Local declaration |
---|
332 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
333 | REAL(wp) :: z05cx, ztau, zin |
---|
334 | !!------------------------------------------------------------------------------ |
---|
335 | |
---|
336 | ! 1. First three time steps and more if lfbcnorth is .TRUE. |
---|
337 | ! In that case open boundary conditions are FIXED. |
---|
338 | ! -------------------------------------------------------- |
---|
339 | |
---|
340 | IF( ( kt < nit000+3 .AND. .NOT.ln_rstart ) .OR. lfbcnorth ) THEN |
---|
341 | |
---|
342 | DO jj = fs_njn0+1, fs_njn1+1 ! Vector opt. |
---|
343 | DO jk = 1, jpkm1 |
---|
344 | DO ji = 1, jpi |
---|
345 | ta(ji,jj,jk)= ta(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
---|
346 | tnmsk(ji,jk) * tfon(ji,jk) |
---|
347 | sa(ji,jj,jk)= sa(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
---|
348 | tnmsk(ji,jk) * sfon(ji,jk) |
---|
349 | END DO |
---|
350 | END DO |
---|
351 | END DO |
---|
352 | |
---|
353 | ELSE |
---|
354 | |
---|
355 | ! 2. Beyond the fourth time step if lfbcnorth is .FALSE. |
---|
356 | ! ------------------------------------------------------- |
---|
357 | |
---|
358 | ! Temperature and salinity radiation |
---|
359 | ! ---------------------------------- |
---|
360 | ! |
---|
361 | ! ji-1 ji ji ji +1 |
---|
362 | ! | |
---|
363 | ! nib //// u // T // u // T // jpjnob + 1 |
---|
364 | ! /////|////////////////// |
---|
365 | ! nib ----f----v----f----v--- jpjnob |
---|
366 | ! | | |
---|
367 | ! nibm-- u -- T -- u -- T -- jpjnob |
---|
368 | ! | | |
---|
369 | ! nibm ----f----v----f----v--- jpjnob-1 |
---|
370 | ! | | |
---|
371 | ! nibm2-- u -- T -- T -- T -- jpjnob-1 |
---|
372 | ! | | |
---|
373 | ! nibm2 ----f----v----f----v--- jpjnob-2 |
---|
374 | ! | | |
---|
375 | ! |
---|
376 | ! ... radiative conditions + relaxation toward a climatology |
---|
377 | ! ... the phase velocity is taken as the normal phase velocity of the tangen- |
---|
378 | ! ... tial velocity (here un), which has been saved in (u_cynbnd) |
---|
379 | ! ... jpjnob+1,(jpindp1, jpinfm1) |
---|
380 | DO jj = fs_njn0+1, fs_njn1+1 ! Vector opt. |
---|
381 | DO jk = 1, jpkm1 |
---|
382 | DO ji = 2, jpim1 |
---|
383 | ! ... j-phase speed ratio (from averaged of vtnbnd) |
---|
384 | ! (bounded by 1) |
---|
385 | z05cx = ( 0.5 * ( u_cynbnd(ji,jk) + u_cynbnd(ji-1,jk) ) ) / e2t(ji,jj-1) |
---|
386 | z05cx = min( z05cx, 1. ) |
---|
387 | ! ... z05cx=< 0, inflow zin=0, ztau=1 |
---|
388 | ! > 0, outflow zin=1, ztau=rtaun |
---|
389 | zin = sign( 1., z05cx ) |
---|
390 | zin = 0.5*( zin + abs(zin) ) |
---|
391 | ! ... for inflow rtaunin is used for relaxation coefficient else rtaun |
---|
392 | ztau = (1.-zin ) * rtaunin + zin * rtaun |
---|
393 | z05cx = z05cx * zin |
---|
394 | ! ... update (ta,sa) with radiative or climatological (t, s) |
---|
395 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
---|
396 | tnmsk(ji,jk) * ( ( 1. - z05cx - ztau ) & |
---|
397 | * tnbnd(ji,jk,nib ,nitm) + 2.*z05cx & |
---|
398 | * tnbnd(ji,jk,nibm,nit ) + ztau * tfon (ji,jk) ) & |
---|
399 | / (1. + z05cx) |
---|
400 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
---|
401 | tnmsk(ji,jk) * ( ( 1. - z05cx - ztau ) & |
---|
402 | * snbnd(ji,jk,nib ,nitm) + 2.*z05cx & |
---|
403 | * snbnd(ji,jk,nibm,nit ) + ztau * sfon (ji,jk) ) & |
---|
404 | / (1. + z05cx) |
---|
405 | END DO |
---|
406 | END DO |
---|
407 | END DO |
---|
408 | |
---|
409 | END IF |
---|
410 | |
---|
411 | END SUBROUTINE obc_tra_north |
---|
412 | |
---|
413 | |
---|
414 | SUBROUTINE obc_tra_south ( kt ) |
---|
415 | !!------------------------------------------------------------------------------ |
---|
416 | !! *** SUBROUTINE obc_tra_south *** |
---|
417 | !! |
---|
418 | !! ** Purpose : |
---|
419 | !! Apply the radiation algorithm on south OBC tracers ta, sa using the |
---|
420 | !! phase velocities calculated in obc_rad_south subroutine in obcrad.F90 module |
---|
421 | !! If the logical lfbcsouth is .TRUE., there is no radiation but only fixed OBC |
---|
422 | !! |
---|
423 | !! History : |
---|
424 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
---|
425 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
---|
426 | !! ! 97-12 (M. Imbard) Mpp adaptation |
---|
427 | !! ! 00-06 (J.-M. Molines) |
---|
428 | !! 8.5 ! 02-10 (C. Talandier, A-M Treguier) F90 |
---|
429 | !!------------------------------------------------------------------------------ |
---|
430 | !! * Arguments |
---|
431 | INTEGER, INTENT( in ) :: kt |
---|
432 | |
---|
433 | !! * Local declaration |
---|
434 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
435 | REAL(wp) :: z05cx, ztau, zin |
---|
436 | !!------------------------------------------------------------------------------ |
---|
437 | |
---|
438 | ! 1. First three time steps and more if lfbcsouth is .TRUE. |
---|
439 | ! In that case open boundary conditions are FIXED. |
---|
440 | ! -------------------------------------------------------- |
---|
441 | |
---|
442 | IF( ( kt < nit000+3 .AND. .NOT.ln_rstart ) .OR. lfbcsouth ) THEN |
---|
443 | |
---|
444 | DO jj = fs_njs0, fs_njs1 ! Vector opt. |
---|
445 | DO jk = 1, jpkm1 |
---|
446 | DO ji = 1, jpi |
---|
447 | ta(ji,jj,jk)= ta(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
---|
448 | tsmsk(ji,jk) * tfos(ji,jk) |
---|
449 | sa(ji,jj,jk)= sa(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
---|
450 | tsmsk(ji,jk) * sfos(ji,jk) |
---|
451 | END DO |
---|
452 | END DO |
---|
453 | END DO |
---|
454 | |
---|
455 | ELSE |
---|
456 | |
---|
457 | ! 2. Beyond the fourth time step if lfbcsouth is .FALSE. |
---|
458 | ! ------------------------------------------------------- |
---|
459 | |
---|
460 | ! Temperature and salinity radiation |
---|
461 | ! ---------------------------------- |
---|
462 | ! |
---|
463 | ! ji-1 ji ji ji +1 |
---|
464 | ! | | |
---|
465 | ! nibm2 ----f----v----f----v--- jpjsob+2 |
---|
466 | ! | | |
---|
467 | ! nibm2 -- u -- T -- u -- T -- jpjsob+2 |
---|
468 | ! | | |
---|
469 | ! nibm ----f----v----f----v--- jpjsob+1 |
---|
470 | ! | | |
---|
471 | ! nibm -- u -- T -- T -- T -- jpjsob+1 |
---|
472 | ! | | |
---|
473 | ! nib -----f----v----f----v--- jpjsob |
---|
474 | ! //////|/////////|//////// |
---|
475 | ! nib //// u // T // u // T // jpjsob |
---|
476 | ! |
---|
477 | !... radiative conditions + relaxation toward a climatology |
---|
478 | !... the phase velocity is taken as the phase velocity of the tangen- |
---|
479 | !... tial velocity (here un), which has been saved in (u_cysbnd) |
---|
480 | !... jpjsob,(jpisdp1, jpisfm1) |
---|
481 | DO jj = fs_njs0, fs_njs1 ! Vector opt. |
---|
482 | DO jk = 1, jpkm1 |
---|
483 | DO ji = 2, jpim1 |
---|
484 | !... j-phase speed ratio (from averaged of u_cysbnd) |
---|
485 | ! (bounded by 1) |
---|
486 | z05cx = ( 0.5 * ( u_cysbnd(ji,jk) + u_cysbnd(ji-1,jk) ) ) / e2t(ji,jj+1) |
---|
487 | z05cx = max( z05cx, -1. ) |
---|
488 | !... z05cx > 0, inflow zin=0, ztau=1 |
---|
489 | ! < 0, outflow zin=1, ztau=rtaus |
---|
490 | zin = sign( 1., -1.* z05cx ) |
---|
491 | zin = 0.5*( zin + abs(zin) ) |
---|
492 | ztau = (1.-zin ) * rtausin + zin * rtaus |
---|
493 | z05cx = z05cx * zin |
---|
494 | |
---|
495 | !... update (ta,sa) with radiative or climatological (t, s) |
---|
496 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
---|
497 | tsmsk(ji,jk) * ( ( 1. + z05cx - ztau ) & |
---|
498 | * tsbnd(ji,jk,nib ,nitm) - 2.*z05cx & |
---|
499 | * tsbnd(ji,jk,nibm,nit ) + ztau * tfos (ji,jk) ) & |
---|
500 | / (1. - z05cx) |
---|
501 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
---|
502 | tsmsk(ji,jk) * ( ( 1. + z05cx - ztau ) & |
---|
503 | * ssbnd(ji,jk,nib ,nitm) - 2.*z05cx & |
---|
504 | * ssbnd(ji,jk,nibm,nit ) + ztau * sfos (ji,jk) ) & |
---|
505 | / (1. - z05cx) |
---|
506 | END DO |
---|
507 | END DO |
---|
508 | END DO |
---|
509 | |
---|
510 | END IF |
---|
511 | |
---|
512 | END SUBROUTINE obc_tra_south |
---|
513 | |
---|
514 | #else |
---|
515 | !!--------------------------------------------------------------------------------- |
---|
516 | !! Default option Empty module |
---|
517 | !!--------------------------------------------------------------------------------- |
---|
518 | CONTAINS |
---|
519 | SUBROUTINE obc_tra ! Empty routine |
---|
520 | END SUBROUTINE obc_tra |
---|
521 | #endif |
---|
522 | |
---|
523 | !!================================================================================= |
---|
524 | END MODULE obctra |
---|