| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_advdiff.F,v 1.42 2010/06/30 02:13:54 jmc Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "SEAICE_OPTIONS.h" |
| 5 |
|
| 6 |
CBOP |
| 7 |
C !ROUTINE: SEAICE_ADVDIFF |
| 8 |
|
| 9 |
C !INTERFACE: ========================================================== |
| 10 |
SUBROUTINE SEAICE_ADVDIFF( |
| 11 |
I myTime, myIter, myThid ) |
| 12 |
|
| 13 |
C !DESCRIPTION: \bv |
| 14 |
C *===========================================================* |
| 15 |
C | SUBROUTINE SEAICE_ADVDIFF |
| 16 |
C | o driver for different advection routines |
| 17 |
C | calls an adaption of gad_advection to call different |
| 18 |
C | advection routines of pkg/generic_advdiff |
| 19 |
C *===========================================================* |
| 20 |
C \ev |
| 21 |
|
| 22 |
C !USES: =============================================================== |
| 23 |
IMPLICIT NONE |
| 24 |
|
| 25 |
C === Global variables === |
| 26 |
C UICE/VICE :: ice velocity |
| 27 |
C HEFF :: scalar field to be advected |
| 28 |
C HEFFM :: mask for scalar field |
| 29 |
#include "SIZE.h" |
| 30 |
#include "EEPARAMS.h" |
| 31 |
#include "PARAMS.h" |
| 32 |
#include "GRID.h" |
| 33 |
#include "GAD.h" |
| 34 |
#include "SEAICE_PARAMS.h" |
| 35 |
#include "SEAICE.h" |
| 36 |
|
| 37 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 38 |
# include "tamc.h" |
| 39 |
#endif |
| 40 |
|
| 41 |
C !INPUT PARAMETERS: =================================================== |
| 42 |
C === Routine arguments === |
| 43 |
C myTime :: current time |
| 44 |
C myIter :: iteration number |
| 45 |
C myThid :: Thread no. that called this routine. |
| 46 |
_RL myTime |
| 47 |
INTEGER myIter |
| 48 |
INTEGER myThid |
| 49 |
CEndOfInterface |
| 50 |
|
| 51 |
C !LOCAL VARIABLES: ==================================================== |
| 52 |
C === Local variables === |
| 53 |
C i,j,bi,bj :: Loop counters |
| 54 |
C ks :: surface level index |
| 55 |
C uc/vc :: current ice velocity on C-grid |
| 56 |
C uTrans :: volume transport, x direction |
| 57 |
C vTrans :: volume transport, y direction |
| 58 |
C iceFld :: copy of seaice field |
| 59 |
C afx :: horizontal advective flux, x direction |
| 60 |
C afy :: horizontal advective flux, y direction |
| 61 |
C gFld :: tendency of seaice field |
| 62 |
C xA,yA :: "areas" of X and Y face of tracer cells |
| 63 |
INTEGER i, j, bi, bj |
| 64 |
INTEGER ks |
| 65 |
LOGICAL SEAICEmultiDimAdvection |
| 66 |
|
| 67 |
C- MPI+MTH: apply exch (sure with exch1) only to array in common block |
| 68 |
COMMON / SEAICE_ADVDIFF_LOCAL / uc, vc |
| 69 |
_RL uc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 70 |
_RL vc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 71 |
_RL fldNm1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 72 |
_RL uTrans (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 73 |
_RL vTrans (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 74 |
c _RL iceFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 75 |
_RL afx (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 76 |
_RL afy (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 77 |
_RL gFld (1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 78 |
_RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 79 |
_RS yA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 80 |
_RL recip_heff(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 81 |
CEOP |
| 82 |
|
| 83 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 84 |
|
| 85 |
ks = 1 |
| 86 |
|
| 87 |
C-- make a local copy of the velocities for compatibility with B-grid |
| 88 |
C-- alternatively interpolate to C-points if necessary |
| 89 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 90 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 91 |
#ifdef SEAICE_CGRID |
| 92 |
DO j=1-Oly,sNy+Oly |
| 93 |
DO i=1-Olx,sNx+Olx |
| 94 |
uc(i,j,bi,bj)=UICE(i,j,bi,bj) |
| 95 |
vc(i,j,bi,bj)=VICE(i,j,bi,bj) |
| 96 |
ENDDO |
| 97 |
ENDDO |
| 98 |
#else /* not SEAICE_CGRID = BGRID */ |
| 99 |
C average seaice velocity to C-grid |
| 100 |
DO j=1-Oly,sNy+Oly-1 |
| 101 |
DO i=1-Olx,sNx+Olx-1 |
| 102 |
uc(i,j,bi,bj)=.5 _d 0*(UICE(i,j,bi,bj)+UICE(i,j+1,bi,bj)) |
| 103 |
vc(i,j,bi,bj)=.5 _d 0*(VICE(i,j,bi,bj)+VICE(I+1,J,bi,bj)) |
| 104 |
ENDDO |
| 105 |
ENDDO |
| 106 |
#endif /* SEAICE_CGRID */ |
| 107 |
ENDDO |
| 108 |
ENDDO |
| 109 |
|
| 110 |
#ifndef SEAICE_CGRID |
| 111 |
C Do we need this? I am afraid so. |
| 112 |
CALL EXCH_UV_XY_RL(uc,vc,.TRUE.,myThid) |
| 113 |
#endif /* not SEAICE_CGRID */ |
| 114 |
|
| 115 |
SEAICEmultidimadvection = .TRUE. |
| 116 |
IF ( SEAICEadvScheme.EQ.ENUM_CENTERED_2ND |
| 117 |
& .OR.SEAICEadvScheme.EQ.ENUM_UPWIND_3RD |
| 118 |
& .OR.SEAICEadvScheme.EQ.ENUM_CENTERED_4TH ) THEN |
| 119 |
SEAICEmultiDimAdvection = .FALSE. |
| 120 |
ENDIF |
| 121 |
|
| 122 |
|
| 123 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 124 |
CADJ STORE area = comlev1, key = ikey_dynamics, kind=isbyte |
| 125 |
CADJ STORE heff = comlev1, key = ikey_dynamics, kind=isbyte |
| 126 |
CADJ STORE heffm = comlev1, key = ikey_dynamics, kind=isbyte |
| 127 |
CADJ STORE hsnow = comlev1, key = ikey_dynamics, kind=isbyte |
| 128 |
# ifdef SEAICE_SALINITY |
| 129 |
CADJ STORE hsalt = comlev1, key = ikey_dynamics, kind=isbyte |
| 130 |
# endif |
| 131 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
| 132 |
IF ( SEAICEmultiDimAdvection ) THEN |
| 133 |
C This has to be done to comply with the time stepping in advect.F: |
| 134 |
C Making sure that the following routines see the different |
| 135 |
C time levels correctly |
| 136 |
C At the end of the routine ADVECT, |
| 137 |
C timelevel 1 is updated with advection contribution |
| 138 |
C and diffusion contribution |
| 139 |
C (which was computed in DIFFUS on timelevel 3) |
| 140 |
C timelevel 2 is the previous timelevel 1 |
| 141 |
C timelevel 3 is the total diffusion tendency * deltaT |
| 142 |
C (empty if no diffusion) |
| 143 |
|
| 144 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 145 |
CADJ STORE uc = comlev1, key = ikey_dynamics, kind=isbyte |
| 146 |
CADJ STORE vc = comlev1, key = ikey_dynamics, kind=isbyte |
| 147 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
| 148 |
|
| 149 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 150 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 151 |
C--- loops on tile indices bi,bj |
| 152 |
|
| 153 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 154 |
C Initialise for TAF |
| 155 |
DO j=1-Oly,sNy+Oly |
| 156 |
DO i=1-Olx,sNx+Olx |
| 157 |
c iceFld(i,j) = 0. _d 0 |
| 158 |
gFld(i,j) = 0. _d 0 |
| 159 |
ENDDO |
| 160 |
ENDDO |
| 161 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
| 162 |
|
| 163 |
DO j=1-OLy,sNy+OLy |
| 164 |
DO i=1-OLx,sNx+OLx |
| 165 |
HEFFNM1(i,j,bi,bj) = HEFF(i,j,bi,bj) |
| 166 |
AREANM1(i,j,bi,bj) = AREA(i,j,bi,bj) |
| 167 |
recip_heff(i,j) = 1. _d 0 |
| 168 |
ENDDO |
| 169 |
ENDDO |
| 170 |
|
| 171 |
C- first compute cell areas used by all tracers |
| 172 |
DO j=1-Oly,sNy+Oly |
| 173 |
DO i=1-Olx,sNx+Olx |
| 174 |
xA(i,j) = _dyG(i,j,bi,bj)*_maskW(i,j,ks,bi,bj) |
| 175 |
yA(i,j) = _dxG(i,j,bi,bj)*_maskS(i,j,ks,bi,bj) |
| 176 |
ENDDO |
| 177 |
ENDDO |
| 178 |
C- Calculate "volume transports" through tracer cell faces. |
| 179 |
DO j=1-Oly,sNy+Oly |
| 180 |
DO i=1-Olx,sNx+Olx |
| 181 |
uTrans(i,j) = uc(i,j,bi,bj)*xA(i,j) |
| 182 |
vTrans(i,j) = vc(i,j,bi,bj)*yA(i,j) |
| 183 |
ENDDO |
| 184 |
ENDDO |
| 185 |
|
| 186 |
C-- Effective Thickness (Volume) |
| 187 |
IF ( SEAICEadvHeff ) THEN |
| 188 |
CALL SEAICE_ADVECTION( |
| 189 |
I GAD_HEFF, SEAICEadvSchHeff, |
| 190 |
I uc(1-OLx,1-OLy,bi,bj), vc(1-OLx,1-OLy,bi,bj), |
| 191 |
I uTrans, vTrans, HEFF(1-OLx,1-OLy,bi,bj), recip_heff, |
| 192 |
O gFld, afx, afy, |
| 193 |
I bi, bj, myTime, myIter, myThid ) |
| 194 |
IF ( diff1 .GT. 0. _d 0 ) THEN |
| 195 |
C- Add tendency due to diffusion |
| 196 |
CALL SEAICE_DIFFUSION( |
| 197 |
I GAD_HEFF, |
| 198 |
I HEFF(1-OLx,1-OLy,bi,bj), HEFFM, xA, yA, |
| 199 |
U gFld, |
| 200 |
I bi, bj, myTime, myIter, myThid ) |
| 201 |
ENDIF |
| 202 |
C now do the "explicit" time step |
| 203 |
DO j=1,sNy |
| 204 |
DO i=1,sNx |
| 205 |
HEFF(i,j,bi,bj) = HEFFM(i,j,bi,bj) * ( |
| 206 |
& HEFF(i,j,bi,bj) + SEAICE_deltaTtherm * gFld(i,j) |
| 207 |
& ) |
| 208 |
ENDDO |
| 209 |
ENDDO |
| 210 |
ENDIF |
| 211 |
|
| 212 |
C-- Fractional area |
| 213 |
IF ( SEAICEadvArea ) THEN |
| 214 |
CALL SEAICE_ADVECTION( |
| 215 |
I GAD_AREA, SEAICEadvSchArea, |
| 216 |
I uc(1-OLx,1-OLy,bi,bj), vc(1-OLx,1-OLy,bi,bj), |
| 217 |
I uTrans, vTrans, AREA(1-OLx,1-OLy,bi,bj), recip_heff, |
| 218 |
O gFld, afx, afy, |
| 219 |
I bi, bj, myTime, myIter, myThid ) |
| 220 |
IF ( diff1 .GT. 0. _d 0 ) THEN |
| 221 |
C- Add tendency due to diffusion |
| 222 |
CALL SEAICE_DIFFUSION( |
| 223 |
I GAD_AREA, |
| 224 |
I AREA(1-OLx,1-OLy,bi,bj), HEFFM, xA, yA, |
| 225 |
U gFld, |
| 226 |
I bi, bj, myTime, myIter, myThid ) |
| 227 |
ENDIF |
| 228 |
C now do the "explicit" time step |
| 229 |
DO j=1,sNy |
| 230 |
DO i=1,sNx |
| 231 |
AREA(i,j,bi,bj) = HEFFM(i,j,bi,bj) * ( |
| 232 |
& AREA(i,j,bi,bj) + SEAICE_deltaTtherm * gFld(i,j) |
| 233 |
& ) |
| 234 |
ENDDO |
| 235 |
ENDDO |
| 236 |
ENDIF |
| 237 |
|
| 238 |
C-- Effective Snow Thickness (Volume) |
| 239 |
IF ( SEAICEadvSnow ) THEN |
| 240 |
CALL SEAICE_ADVECTION( |
| 241 |
I GAD_SNOW, SEAICEadvSchSnow, |
| 242 |
I uc(1-OLx,1-OLy,bi,bj), vc(1-OLx,1-OLy,bi,bj), |
| 243 |
I uTrans, vTrans, HSNOW(1-OLx,1-OLy,bi,bj), recip_heff, |
| 244 |
O gFld, afx, afy, |
| 245 |
I bi, bj, myTime, myIter, myThid ) |
| 246 |
IF ( diff1 .GT. 0. _d 0 ) THEN |
| 247 |
C-- Add tendency due to diffusion |
| 248 |
CALL SEAICE_DIFFUSION( |
| 249 |
I GAD_SNOW, |
| 250 |
I HSNOW(1-OLx,1-OLy,bi,bj), HEFFM, xA, yA, |
| 251 |
U gFld, |
| 252 |
I bi, bj, myTime, myIter, myThid ) |
| 253 |
ENDIF |
| 254 |
C now do the "explicit" time step |
| 255 |
DO j=1,sNy |
| 256 |
DO i=1,sNx |
| 257 |
HSNOW(i,j,bi,bj) = HEFFM(i,j,bi,bj) * ( |
| 258 |
& HSNOW(i,j,bi,bj) + SEAICE_deltaTtherm * gFld(i,j) |
| 259 |
& ) |
| 260 |
ENDDO |
| 261 |
ENDDO |
| 262 |
ENDIF |
| 263 |
|
| 264 |
#ifdef SEAICE_SALINITY |
| 265 |
C-- Effective Sea Ice Salinity (Mass of salt) |
| 266 |
IF ( SEAICEadvSalt ) THEN |
| 267 |
CALL SEAICE_ADVECTION( |
| 268 |
I GAD_SALT, SEAICEadvSchSalt, |
| 269 |
I uc(1-OLx,1-OLy,bi,bj), vc(1-OLx,1-OLy,bi,bj), |
| 270 |
I uTrans, vTrans, HSALT(1-OLx,1-OLy,bi,bj), recip_heff, |
| 271 |
O gFld, afx, afy, |
| 272 |
I bi, bj, myTime, myIter, myThid ) |
| 273 |
IF ( diff1 .GT. 0. _d 0 ) THEN |
| 274 |
C-- Add tendency due to diffusion |
| 275 |
CALL SEAICE_DIFFUSION( |
| 276 |
I GAD_SALT, |
| 277 |
I HSALT(1-OLx,1-OLy,bi,bj), HEFFM, xA, yA, |
| 278 |
U gFld, |
| 279 |
I bi, bj, myTime, myIter, myThid ) |
| 280 |
ENDIF |
| 281 |
C now do the "explicit" time step |
| 282 |
DO j=1,sNy |
| 283 |
DO i=1,sNx |
| 284 |
HSALT(i,j,bi,bj) = HEFFM(i,j,bi,bj) * ( |
| 285 |
& HSALT(i,j,bi,bj) + SEAICE_deltaTtherm * gFld(i,j) |
| 286 |
& ) |
| 287 |
ENDDO |
| 288 |
ENDDO |
| 289 |
ENDIF |
| 290 |
#endif /* SEAICE_SALINITY */ |
| 291 |
|
| 292 |
#ifdef SEAICE_AGE |
| 293 |
C-- Sea Ice Age |
| 294 |
IF ( SEAICEadvAge ) THEN |
| 295 |
CALL SEAICE_ADVECTION( |
| 296 |
I GAD_AGE, SEAICEadvSchAge, |
| 297 |
I uc(1-OLx,1-OLy,bi,bj), vc(1-OLx,1-OLy,bi,bj), |
| 298 |
I uTrans, vTrans, IceAge(1-OLx,1-OLy,bi,bj), recip_heff, |
| 299 |
O gFld, afx, afy, |
| 300 |
I bi, bj, myTime, myIter, myThid ) |
| 301 |
IF ( diff1 .GT. 0. _d 0 ) THEN |
| 302 |
C-- Add tendency due to diffusion |
| 303 |
CALL SEAICE_DIFFUSION( |
| 304 |
I GAD_AGE, |
| 305 |
I IceAge(1-OLx,1-OLy,bi,bj), HEFFM, xA, yA, |
| 306 |
U gFld, |
| 307 |
I bi, bj, myTime, myIter, myThid ) |
| 308 |
ENDIF |
| 309 |
C now do the "explicit" time step |
| 310 |
DO j=1,sNy |
| 311 |
DO i=1,sNx |
| 312 |
IceAge(i,j,bi,bj) = HEFFM(i,j,bi,bj) * ( |
| 313 |
& IceAge(i,j,bi,bj) + SEAICE_deltaTtherm * gFld(i,j) |
| 314 |
& ) |
| 315 |
ENDDO |
| 316 |
ENDDO |
| 317 |
ENDIF |
| 318 |
#endif /* SEAICE_AGE */ |
| 319 |
|
| 320 |
C--- end bi,bj loops |
| 321 |
ENDDO |
| 322 |
ENDDO |
| 323 |
|
| 324 |
ELSE |
| 325 |
C-- if not multiDimAdvection |
| 326 |
|
| 327 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 328 |
CADJ STORE uc = comlev1, key = ikey_dynamics, kind=isbyte |
| 329 |
CADJ STORE vc = comlev1, key = ikey_dynamics, kind=isbyte |
| 330 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
| 331 |
|
| 332 |
IF ( SEAICEadvHEff ) THEN |
| 333 |
CALL ADVECT( uc, vc, hEff, hEffNm1, HEFFM, myThid ) |
| 334 |
ENDIF |
| 335 |
IF ( SEAICEadvArea ) THEN |
| 336 |
CALL ADVECT( uc, vc, area, areaNm1, HEFFM, myThid ) |
| 337 |
ENDIF |
| 338 |
IF ( SEAICEadvSnow ) THEN |
| 339 |
CALL ADVECT( uc, vc, HSNOW, fldNm1, HEFFM, myThid ) |
| 340 |
ENDIF |
| 341 |
|
| 342 |
#ifdef SEAICE_SALINITY |
| 343 |
IF ( SEAICEadvSalt ) THEN |
| 344 |
CALL ADVECT( uc, vc, HSALT, fldNm1, HEFFM, myThid ) |
| 345 |
ENDIF |
| 346 |
#endif /* SEAICE_SALINITY */ |
| 347 |
|
| 348 |
#ifdef SEAICE_AGE |
| 349 |
IF ( SEAICEadvAge ) THEN |
| 350 |
CALL ADVECT( uc, vc, iceAge, fldNm1, HEFFM, myThid ) |
| 351 |
ENDIF |
| 352 |
#endif /* SEAICE_AGE */ |
| 353 |
|
| 354 |
C-- end if multiDimAdvection |
| 355 |
ENDIF |
| 356 |
|
| 357 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 358 |
CADJ STORE AREA = comlev1, key = ikey_dynamics, kind=isbyte |
| 359 |
#endif |
| 360 |
IF ( .NOT. usePW79thermodynamics ) THEN |
| 361 |
C Hiblers "ridging function": Do it now if not in seaice_growth |
| 362 |
C in principle we should add a "real" ridging function here (or |
| 363 |
C somewhere after doing the advection) |
| 364 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 365 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 366 |
DO j=1-Oly,sNy+Oly |
| 367 |
DO i=1-Olx,sNx+Olx |
| 368 |
#ifdef SEAICE_AGE |
| 369 |
C avoid ridging of sea ice age (at this point ridged ice means AREA > 1) |
| 370 |
IceAge(I,J,bi,bj) = IceAge(I,J,bi,bj) |
| 371 |
& / MAX(ONE,AREA(I,J,bi,bj)) |
| 372 |
#endif /* SEAICE_AGE */ |
| 373 |
AREA(I,J,bi,bj) = MIN(ONE,AREA(I,J,bi,bj)) |
| 374 |
ENDDO |
| 375 |
ENDDO |
| 376 |
ENDDO |
| 377 |
ENDDO |
| 378 |
#ifdef SEAICE_AGE |
| 379 |
C Sources and sinks for sea ice age (otherwise added in seaice_growth) |
| 380 |
IF ( .TRUE. ) THEN |
| 381 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 382 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 383 |
DO J=1,sNy |
| 384 |
DO I=1,sNx |
| 385 |
IF ( AREA(I,J,bi,bj) .GT. 0.15 ) THEN |
| 386 |
IceAge(i,j,bi,bj) = IceAge(i,j,bi,bj) + |
| 387 |
& AREA(I,J,bi,bj) * SEAICE_deltaTtherm |
| 388 |
ELSE |
| 389 |
IceAge(i,j,bi,bj) = ZERO |
| 390 |
ENDIF |
| 391 |
ENDDO |
| 392 |
ENDDO |
| 393 |
ENDDO |
| 394 |
ENDDO |
| 395 |
ENDIF |
| 396 |
#endif /* SEAICE_AGE */ |
| 397 |
ENDIF |
| 398 |
|
| 399 |
RETURN |
| 400 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph