| 1 |
MODULE guide_m |
| 2 |
|
| 3 |
! From dyn3d/guide.F, version 1.3 2005/05/25 13:10:09 |
| 4 |
! and dyn3d/guide.h, version 1.1.1.1 2004/05/19 12:53:06 |
| 5 |
|
| 6 |
REAL :: tau_min_u, tau_max_u |
| 7 |
REAL :: tau_min_v, tau_max_v |
| 8 |
REAL :: tau_min_t, tau_max_t |
| 9 |
REAL :: tau_min_q, tau_max_q |
| 10 |
REAL :: tau_min_p, tau_max_p |
| 11 |
REAL :: aire_min, aire_max |
| 12 |
|
| 13 |
|
| 14 |
LOGICAL :: guide_u, guide_v, guide_t, guide_q, guide_p |
| 15 |
REAL :: lat_min_guide, lat_max_guide |
| 16 |
|
| 17 |
LOGICAL :: ncep, ini_anal |
| 18 |
INTEGER :: online |
| 19 |
|
| 20 |
CONTAINS |
| 21 |
|
| 22 |
SUBROUTINE guide(itau, ucov, vcov, teta, q, masse, ps) |
| 23 |
|
| 24 |
! Author: F.Hourdin |
| 25 |
|
| 26 |
USE dimens_m, ONLY : jjm, llm |
| 27 |
USE paramet_m, ONLY : iip1, ip1jm, ip1jmp1, jjp1, llmp1 |
| 28 |
USE comconst, ONLY : cpp, daysec, dtvr, kappa, pi |
| 29 |
USE comvert, ONLY : ap, bp, preff, presnivs |
| 30 |
USE conf_gcm_m, ONLY : day_step, iperiod |
| 31 |
USE comgeom, ONLY : aire, rlatu, rlonv |
| 32 |
USE serre, ONLY : clat, clon |
| 33 |
USE q_sat_m, ONLY : q_sat |
| 34 |
USE exner_hyb_m, ONLY : exner_hyb |
| 35 |
USE pression_m, ONLY : pression |
| 36 |
USE inigrads_m, ONLY : inigrads |
| 37 |
use netcdf, only: nf90_nowrite, nf90_open, nf90_close |
| 38 |
|
| 39 |
IMPLICIT NONE |
| 40 |
|
| 41 |
INCLUDE 'netcdf.inc' |
| 42 |
|
| 43 |
! variables dynamiques |
| 44 |
REAL :: vcov(ip1jm, llm), ucov(ip1jmp1, llm) ! vents covariants |
| 45 |
REAL, intent(inout):: teta(ip1jmp1, llm) ! temperature potentielle |
| 46 |
REAL :: q(ip1jmp1, llm) ! temperature potentielle |
| 47 |
REAL :: ps(ip1jmp1) ! pression au sol |
| 48 |
REAL :: masse(ip1jmp1, llm) ! masse d'air |
| 49 |
|
| 50 |
! common passe pour des sorties |
| 51 |
REAL :: dxdys(iip1, jjp1), dxdyu(iip1, jjp1), dxdyv(iip1, jjm) |
| 52 |
COMMON /comdxdy/dxdys, dxdyu, dxdyv |
| 53 |
|
| 54 |
! variables dynamiques pour les reanalyses. |
| 55 |
REAL :: ucovrea1(ip1jmp1, llm), vcovrea1(ip1jm, llm) !vts cov reas |
| 56 |
REAL :: tetarea1(ip1jmp1, llm) ! temp pot reales |
| 57 |
REAL :: qrea1(ip1jmp1, llm) ! temp pot reales |
| 58 |
REAL :: psrea1(ip1jmp1) ! ps |
| 59 |
REAL :: ucovrea2(ip1jmp1, llm), vcovrea2(ip1jm, llm) !vts cov reas |
| 60 |
REAL :: tetarea2(ip1jmp1, llm) ! temp pot reales |
| 61 |
REAL :: qrea2(ip1jmp1, llm) ! temp pot reales |
| 62 |
REAL :: masserea2(ip1jmp1, llm) ! masse |
| 63 |
REAL :: psrea2(ip1jmp1) ! ps |
| 64 |
|
| 65 |
REAL :: alpha_q(ip1jmp1) |
| 66 |
REAL :: alpha_t(ip1jmp1), alpha_p(ip1jmp1) |
| 67 |
REAL :: alpha_u(ip1jmp1), alpha_v(ip1jm) |
| 68 |
REAL :: dday_step, toto, reste, itau_test |
| 69 |
INTEGER :: step_rea, count_no_rea |
| 70 |
|
| 71 |
INTEGER :: ilon, ilat |
| 72 |
REAL :: factt, ztau(ip1jmp1) |
| 73 |
|
| 74 |
INTEGER, INTENT (IN) :: itau |
| 75 |
INTEGER :: ij, l |
| 76 |
INTEGER :: ncidpl, varidpl, nlev, status |
| 77 |
INTEGER :: rcod, rid |
| 78 |
REAL :: ditau, tau, a |
| 79 |
SAVE nlev |
| 80 |
|
| 81 |
! TEST SUR QSAT |
| 82 |
REAL :: p(ip1jmp1, llmp1), pk(ip1jmp1, llm), pks(ip1jmp1) |
| 83 |
REAL :: pkf(ip1jmp1, llm) |
| 84 |
REAL :: pres(ip1jmp1, llm) |
| 85 |
|
| 86 |
REAL :: qsat(ip1jmp1, llm) |
| 87 |
REAL :: unskap |
| 88 |
REAL :: tnat(ip1jmp1, llm) |
| 89 |
|
| 90 |
|
| 91 |
LOGICAL :: first |
| 92 |
SAVE first |
| 93 |
DATA first/ .TRUE./ |
| 94 |
|
| 95 |
SAVE ucovrea1, vcovrea1, tetarea1, psrea1, qrea1 |
| 96 |
SAVE ucovrea2, vcovrea2, tetarea2, masserea2, psrea2, qrea2 |
| 97 |
|
| 98 |
SAVE alpha_t, alpha_q, alpha_u, alpha_v, alpha_p, itau_test |
| 99 |
SAVE step_rea, count_no_rea |
| 100 |
|
| 101 |
CHARACTER (10) :: file |
| 102 |
INTEGER :: igrads |
| 103 |
REAL :: dtgrads |
| 104 |
SAVE igrads, dtgrads |
| 105 |
DATA igrads, dtgrads/2, 100./ |
| 106 |
|
| 107 |
!----------------------------------------------------------------------- |
| 108 |
|
| 109 |
PRINT *, 'Call sequence information: guide' |
| 110 |
|
| 111 |
! calcul de l'humidite saturante |
| 112 |
|
| 113 |
CALL pression(ip1jmp1, ap, bp, ps, p) |
| 114 |
CALL massdair(p, masse) |
| 115 |
PRINT *, 'OK1' |
| 116 |
CALL exner_hyb(ps, p, pks, pk, pkf) |
| 117 |
PRINT *, 'OK2' |
| 118 |
tnat(:, :) = pk(:, :)*teta(:, :)/cpp |
| 119 |
PRINT *, 'OK3' |
| 120 |
unskap = 1./kappa |
| 121 |
pres(:, :) = preff*(pk(:, :)/cpp)**unskap |
| 122 |
PRINT *, 'OK4' |
| 123 |
qsat = q_sat(tnat, pres) |
| 124 |
|
| 125 |
! initialisations pour la lecture des reanalyses. |
| 126 |
! alpha determine la part des injections de donnees a chaque etape |
| 127 |
! alpha=1 signifie pas d'injection |
| 128 |
! alpha=0 signifie injection totale |
| 129 |
|
| 130 |
PRINT *, 'ONLINE=', online |
| 131 |
IF (online==-1) THEN |
| 132 |
RETURN |
| 133 |
END IF |
| 134 |
|
| 135 |
IF (first) THEN |
| 136 |
|
| 137 |
PRINT *, 'initialisation du guide ' |
| 138 |
CALL conf_guide |
| 139 |
PRINT *, 'apres conf_guide' |
| 140 |
|
| 141 |
file = 'guide' |
| 142 |
CALL inigrads(igrads, rlonv, 180./pi, -180., 180., rlatu, -90., 90., & |
| 143 |
180./pi, presnivs, 1., dtgrads, file, 'dyn_zon ') |
| 144 |
|
| 145 |
PRINT *, & |
| 146 |
'1: en-ligne, 0: hors-ligne (x=x_rea), -1: climat (x=x_gcm)' |
| 147 |
|
| 148 |
IF (online==-1) RETURN |
| 149 |
IF (online==1) THEN |
| 150 |
|
| 151 |
! Constantes de temps de rappel en jour |
| 152 |
! 0.1 c'est en gros 2h30. |
| 153 |
! 1e10 est une constante infinie donc en gros pas de guidage |
| 154 |
|
| 155 |
! coordonnees du centre du zoom |
| 156 |
CALL coordij(clon, clat, ilon, ilat) |
| 157 |
! aire de la maille au centre du zoom |
| 158 |
aire_min = aire(ilon+(ilat-1)*iip1) |
| 159 |
! aire maximale de la maille |
| 160 |
aire_max = 0. |
| 161 |
DO ij = 1, ip1jmp1 |
| 162 |
aire_max = max(aire_max, aire(ij)) |
| 163 |
END DO |
| 164 |
! factt = pas de temps en fraction de jour |
| 165 |
factt = dtvr*iperiod/daysec |
| 166 |
|
| 167 |
CALL tau2alpha(3, iip1, jjm, factt, tau_min_v, tau_max_v, alpha_v) |
| 168 |
CALL tau2alpha(2, iip1, jjp1, factt, tau_min_u, tau_max_u, alpha_u) |
| 169 |
CALL tau2alpha(1, iip1, jjp1, factt, tau_min_t, tau_max_t, alpha_t) |
| 170 |
CALL tau2alpha(1, iip1, jjp1, factt, tau_min_p, tau_max_p, alpha_p) |
| 171 |
CALL tau2alpha(1, iip1, jjp1, factt, tau_min_q, tau_max_q, alpha_q) |
| 172 |
|
| 173 |
CALL dump2d(iip1, jjp1, aire, 'AIRE MAILLe ') |
| 174 |
CALL dump2d(iip1, jjp1, alpha_u, 'COEFF U ') |
| 175 |
CALL dump2d(iip1, jjp1, alpha_t, 'COEFF T ') |
| 176 |
|
| 177 |
! Cas ou on force exactement par les variables analysees |
| 178 |
ELSE |
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alpha_t = 0. |
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alpha_u = 0. |
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alpha_v = 0. |
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alpha_p = 0. |
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! physic=.false. |
| 184 |
END IF |
| 185 |
|
| 186 |
itau_test = 1001 |
| 187 |
step_rea = 1 |
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count_no_rea = 0 |
| 189 |
ncidpl = -99 |
| 190 |
|
| 191 |
! itau_test montre si l'importation a deja ete faite au rang itau |
| 192 |
! lecture d'un fichier netcdf pour determiner le nombre de niveaux |
| 193 |
if (guide_u) then |
| 194 |
if (ncidpl.eq.-99) rcod=nf90_open('u.nc',Nf90_NOWRITe,ncidpl) |
| 195 |
endif |
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|
| 197 |
if (guide_v) then |
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if (ncidpl.eq.-99) rcod=nf90_open('v.nc',nf90_nowrite,ncidpl) |
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endif |
| 200 |
|
| 201 |
if (guide_T) then |
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if (ncidpl.eq.-99) rcod=nf90_open('T.nc',nf90_nowrite,ncidpl) |
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endif |
| 204 |
|
| 205 |
if (guide_Q) then |
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if (ncidpl.eq.-99) rcod=nf90_open('hur.nc',nf90_nowrite, ncidpl) |
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endif |
| 208 |
|
| 209 |
IF (ncep) THEN |
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status = nf_inq_dimid(ncidpl, 'LEVEL', rid) |
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ELSE |
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status = nf_inq_dimid(ncidpl, 'PRESSURE', rid) |
| 213 |
END IF |
| 214 |
status = nf_inq_dimlen(ncidpl, rid, nlev) |
| 215 |
PRINT *, 'nlev', nlev |
| 216 |
rcod = nf90_close(ncidpl) |
| 217 |
! Lecture du premier etat des reanalyses. |
| 218 |
CALL read_reanalyse(1, ps, ucovrea2, vcovrea2, tetarea2, qrea2, & |
| 219 |
masserea2, psrea2, 1, nlev) |
| 220 |
qrea2(:, :) = max(qrea2(:, :), 0.1) |
| 221 |
|
| 222 |
|
| 223 |
! Debut de l'integration temporelle: |
| 224 |
END IF ! first |
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|
| 226 |
! IMPORTATION DES VENTS, PRESSION ET TEMPERATURE REELS: |
| 227 |
|
| 228 |
ditau = real(itau) |
| 229 |
dday_step = real(day_step) |
| 230 |
WRITE (*, *) 'ditau, dday_step' |
| 231 |
WRITE (*, *) ditau, dday_step |
| 232 |
toto = 4*ditau/dday_step |
| 233 |
reste = toto - aint(toto) |
| 234 |
|
| 235 |
IF (reste==0.) THEN |
| 236 |
IF (itau_test==itau) THEN |
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WRITE (*, *) 'deuxieme passage de advreel a itau=', itau |
| 238 |
STOP |
| 239 |
ELSE |
| 240 |
vcovrea1(:, :) = vcovrea2(:, :) |
| 241 |
ucovrea1(:, :) = ucovrea2(:, :) |
| 242 |
tetarea1(:, :) = tetarea2(:, :) |
| 243 |
qrea1(:, :) = qrea2(:, :) |
| 244 |
|
| 245 |
PRINT *, 'LECTURE REANALYSES, pas ', step_rea, 'apres ', & |
| 246 |
count_no_rea, ' non lectures' |
| 247 |
step_rea = step_rea + 1 |
| 248 |
itau_test = itau |
| 249 |
CALL read_reanalyse(step_rea, ps, ucovrea2, vcovrea2, tetarea2, & |
| 250 |
qrea2, masserea2, psrea2, 1, nlev) |
| 251 |
qrea2(:, :) = max(qrea2(:, :), 0.1) |
| 252 |
factt = dtvr*iperiod/daysec |
| 253 |
ztau(:) = factt/max(alpha_t(:), 1.E-10) |
| 254 |
CALL wrgrads(igrads, 1, aire, 'aire ', 'aire ') |
| 255 |
CALL wrgrads(igrads, 1, dxdys, 'dxdy ', 'dxdy ') |
| 256 |
CALL wrgrads(igrads, 1, alpha_u, 'au ', 'au ') |
| 257 |
CALL wrgrads(igrads, 1, alpha_t, 'at ', 'at ') |
| 258 |
CALL wrgrads(igrads, 1, ztau, 'taut ', 'taut ') |
| 259 |
CALL wrgrads(igrads, llm, ucov, 'u ', 'u ') |
| 260 |
CALL wrgrads(igrads, llm, ucovrea2, 'ua ', 'ua ') |
| 261 |
CALL wrgrads(igrads, llm, teta, 'T ', 'T ') |
| 262 |
CALL wrgrads(igrads, llm, tetarea2, 'Ta ', 'Ta ') |
| 263 |
CALL wrgrads(igrads, llm, qrea2, 'Qa ', 'Qa ') |
| 264 |
CALL wrgrads(igrads, llm, q, 'Q ', 'Q ') |
| 265 |
|
| 266 |
CALL wrgrads(igrads, llm, qsat, 'QSAT ', 'QSAT ') |
| 267 |
|
| 268 |
END IF |
| 269 |
ELSE |
| 270 |
count_no_rea = count_no_rea + 1 |
| 271 |
END IF |
| 272 |
|
| 273 |
! Guidage |
| 274 |
! x_gcm = a * x_gcm + (1-a) * x_reanalyses |
| 275 |
|
| 276 |
IF (ini_anal) PRINT *, 'ATTENTION !!! ON PART DU GUIDAGE' |
| 277 |
|
| 278 |
ditau = real(itau) |
| 279 |
dday_step = real(day_step) |
| 280 |
|
| 281 |
|
| 282 |
tau = 4*ditau/dday_step |
| 283 |
tau = tau - aint(tau) |
| 284 |
|
| 285 |
! ucov |
| 286 |
IF (guide_u) THEN |
| 287 |
DO l = 1, llm |
| 288 |
DO ij = 1, ip1jmp1 |
| 289 |
a = (1.-tau)*ucovrea1(ij, l) + tau*ucovrea2(ij, l) |
| 290 |
ucov(ij, l) = (1.-alpha_u(ij))*ucov(ij, l) + alpha_u(ij)*a |
| 291 |
IF (first .AND. ini_anal) ucov(ij, l) = a |
| 292 |
END DO |
| 293 |
END DO |
| 294 |
END IF |
| 295 |
|
| 296 |
IF (guide_t) THEN |
| 297 |
DO l = 1, llm |
| 298 |
DO ij = 1, ip1jmp1 |
| 299 |
a = (1.-tau)*tetarea1(ij, l) + tau*tetarea2(ij, l) |
| 300 |
teta(ij, l) = (1.-alpha_t(ij))*teta(ij, l) + alpha_t(ij)*a |
| 301 |
IF (first .AND. ini_anal) teta(ij, l) = a |
| 302 |
END DO |
| 303 |
END DO |
| 304 |
END IF |
| 305 |
|
| 306 |
! P |
| 307 |
IF (guide_p) THEN |
| 308 |
DO ij = 1, ip1jmp1 |
| 309 |
a = (1.-tau)*psrea1(ij) + tau*psrea2(ij) |
| 310 |
ps(ij) = (1.-alpha_p(ij))*ps(ij) + alpha_p(ij)*a |
| 311 |
IF (first .AND. ini_anal) ps(ij) = a |
| 312 |
END DO |
| 313 |
CALL pression(ip1jmp1, ap, bp, ps, p) |
| 314 |
CALL massdair(p, masse) |
| 315 |
END IF |
| 316 |
|
| 317 |
|
| 318 |
! q |
| 319 |
IF (guide_q) THEN |
| 320 |
DO l = 1, llm |
| 321 |
DO ij = 1, ip1jmp1 |
| 322 |
a = (1.-tau)*qrea1(ij, l) + tau*qrea2(ij, l) |
| 323 |
! hum relative en % -> hum specif |
| 324 |
a = qsat(ij, l)*a*0.01 |
| 325 |
q(ij, l) = (1.-alpha_q(ij))*q(ij, l) + alpha_q(ij)*a |
| 326 |
IF (first .AND. ini_anal) q(ij, l) = a |
| 327 |
END DO |
| 328 |
END DO |
| 329 |
END IF |
| 330 |
|
| 331 |
! vcov |
| 332 |
IF (guide_v) THEN |
| 333 |
DO l = 1, llm |
| 334 |
DO ij = 1, ip1jm |
| 335 |
a = (1.-tau)*vcovrea1(ij, l) + tau*vcovrea2(ij, l) |
| 336 |
vcov(ij, l) = (1.-alpha_v(ij))*vcov(ij, l) + alpha_v(ij)*a |
| 337 |
IF (first .AND. ini_anal) vcov(ij, l) = a |
| 338 |
END DO |
| 339 |
IF (first .AND. ini_anal) vcov(ij, l) = a |
| 340 |
END DO |
| 341 |
END IF |
| 342 |
|
| 343 |
first = .FALSE. |
| 344 |
|
| 345 |
END SUBROUTINE guide |
| 346 |
|
| 347 |
!======================================================================= |
| 348 |
SUBROUTINE tau2alpha(type, pim, pjm, factt, taumin, taumax, alpha) |
| 349 |
!======================================================================= |
| 350 |
|
| 351 |
USE dimens_m, ONLY : iim, jjm |
| 352 |
USE paramet_m, ONLY : iip1, jjp1 |
| 353 |
USE comconst, ONLY : pi |
| 354 |
USE comgeom, ONLY : cu_2d, cv_2d, rlatu, rlatv |
| 355 |
USE serre, ONLY : clat, clon, grossismx, grossismy |
| 356 |
IMPLICIT NONE |
| 357 |
|
| 358 |
! arguments : |
| 359 |
INTEGER :: type |
| 360 |
INTEGER :: pim, pjm |
| 361 |
REAL :: factt, taumin, taumax |
| 362 |
REAL :: dxdy_, alpha(pim, pjm) |
| 363 |
REAL :: dxdy_min, dxdy_max |
| 364 |
|
| 365 |
! local : |
| 366 |
REAL :: alphamin, alphamax, gamma, xi |
| 367 |
SAVE gamma |
| 368 |
INTEGER :: i, j, ilon, ilat |
| 369 |
|
| 370 |
LOGICAL :: first |
| 371 |
SAVE first |
| 372 |
DATA first/ .TRUE./ |
| 373 |
|
| 374 |
REAL :: zdx(iip1, jjp1), zdy(iip1, jjp1) |
| 375 |
|
| 376 |
REAL :: zlat |
| 377 |
REAL :: dxdys(iip1, jjp1), dxdyu(iip1, jjp1), dxdyv(iip1, jjm) |
| 378 |
COMMON /comdxdy/dxdys, dxdyu, dxdyv |
| 379 |
|
| 380 |
IF (first) THEN |
| 381 |
DO j = 2, jjm |
| 382 |
DO i = 2, iip1 |
| 383 |
zdx(i, j) = 0.5*(cu_2d(i-1, j)+cu_2d(i, j))/cos(rlatu(j)) |
| 384 |
END DO |
| 385 |
zdx(1, j) = zdx(iip1, j) |
| 386 |
END DO |
| 387 |
DO j = 2, jjm |
| 388 |
DO i = 1, iip1 |
| 389 |
zdy(i, j) = 0.5*(cv_2d(i, j-1)+cv_2d(i, j)) |
| 390 |
END DO |
| 391 |
END DO |
| 392 |
DO i = 1, iip1 |
| 393 |
zdx(i, 1) = zdx(i, 2) |
| 394 |
zdx(i, jjp1) = zdx(i, jjm) |
| 395 |
zdy(i, 1) = zdy(i, 2) |
| 396 |
zdy(i, jjp1) = zdy(i, jjm) |
| 397 |
END DO |
| 398 |
DO j = 1, jjp1 |
| 399 |
DO i = 1, iip1 |
| 400 |
dxdys(i, j) = sqrt(zdx(i, j)*zdx(i, j)+zdy(i, j)*zdy(i, j)) |
| 401 |
END DO |
| 402 |
END DO |
| 403 |
DO j = 1, jjp1 |
| 404 |
DO i = 1, iim |
| 405 |
dxdyu(i, j) = 0.5*(dxdys(i, j)+dxdys(i+1, j)) |
| 406 |
END DO |
| 407 |
dxdyu(iip1, j) = dxdyu(1, j) |
| 408 |
END DO |
| 409 |
DO j = 1, jjm |
| 410 |
DO i = 1, iip1 |
| 411 |
dxdyv(i, j) = 0.5*(dxdys(i, j)+dxdys(i+1, j)) |
| 412 |
END DO |
| 413 |
END DO |
| 414 |
|
| 415 |
CALL dump2d(iip1, jjp1, dxdys, 'DX2DY2 SCAL ') |
| 416 |
CALL dump2d(iip1, jjp1, dxdyu, 'DX2DY2 U ') |
| 417 |
CALL dump2d(iip1, jjp1, dxdyv, 'DX2DY2 v ') |
| 418 |
|
| 419 |
! coordonnees du centre du zoom |
| 420 |
CALL coordij(clon, clat, ilon, ilat) |
| 421 |
! aire de la maille au centre du zoom |
| 422 |
dxdy_min = dxdys(ilon, ilat) |
| 423 |
! dxdy maximale de la maille |
| 424 |
dxdy_max = 0. |
| 425 |
DO j = 1, jjp1 |
| 426 |
DO i = 1, iip1 |
| 427 |
dxdy_max = max(dxdy_max, dxdys(i, j)) |
| 428 |
END DO |
| 429 |
END DO |
| 430 |
|
| 431 |
IF (abs(grossismx-1.)<0.1 .OR. abs(grossismy-1.)<0.1) THEN |
| 432 |
PRINT *, 'ATTENTION modele peu zoome' |
| 433 |
PRINT *, 'ATTENTION on prend une constante de guidage cste' |
| 434 |
gamma = 0. |
| 435 |
ELSE |
| 436 |
gamma = (dxdy_max-2.*dxdy_min)/(dxdy_max-dxdy_min) |
| 437 |
PRINT *, 'gamma=', gamma |
| 438 |
IF (gamma<1.E-5) THEN |
| 439 |
PRINT *, 'gamma =', gamma, '<1e-5' |
| 440 |
STOP |
| 441 |
END IF |
| 442 |
PRINT *, 'gamma=', gamma |
| 443 |
gamma = log(0.5)/log(gamma) |
| 444 |
END IF |
| 445 |
END IF |
| 446 |
|
| 447 |
alphamin = factt/taumax |
| 448 |
alphamax = factt/taumin |
| 449 |
|
| 450 |
DO j = 1, pjm |
| 451 |
DO i = 1, pim |
| 452 |
IF (type==1) THEN |
| 453 |
dxdy_ = dxdys(i, j) |
| 454 |
zlat = rlatu(j)*180./pi |
| 455 |
ELSE IF (type==2) THEN |
| 456 |
dxdy_ = dxdyu(i, j) |
| 457 |
zlat = rlatu(j)*180./pi |
| 458 |
ELSE IF (type==3) THEN |
| 459 |
dxdy_ = dxdyv(i, j) |
| 460 |
zlat = rlatv(j)*180./pi |
| 461 |
END IF |
| 462 |
IF (abs(grossismx-1.)<0.1 .OR. abs(grossismy-1.)<0.1) THEN |
| 463 |
! pour une grille reguliere, xi=xxx**0=1 -> alpha=alphamin |
| 464 |
alpha(i, j) = alphamin |
| 465 |
ELSE |
| 466 |
xi = ((dxdy_max-dxdy_)/(dxdy_max-dxdy_min))**gamma |
| 467 |
xi = min(xi, 1.) |
| 468 |
IF (lat_min_guide<=zlat .AND. zlat<=lat_max_guide) THEN |
| 469 |
alpha(i, j) = xi*alphamin + (1.-xi)*alphamax |
| 470 |
ELSE |
| 471 |
alpha(i, j) = 0. |
| 472 |
END IF |
| 473 |
END IF |
| 474 |
END DO |
| 475 |
END DO |
| 476 |
|
| 477 |
|
| 478 |
RETURN |
| 479 |
END SUBROUTINE tau2alpha |
| 480 |
|
| 481 |
END MODULE guide_m |
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