| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_getforcing.F,v 1.38 2010/05/21 10:08:44 mlosch Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "EXF_OPTIONS.h" |
| 5 |
|
| 6 |
CBOI |
| 7 |
C |
| 8 |
C !TITLE: EXTERNAL FORCING |
| 9 |
C !AUTHORS: mitgcm developers ( support@mitgcm.org ) |
| 10 |
C !AFFILIATION: Massachussetts Institute of Technology |
| 11 |
C !DATE: |
| 12 |
C !INTRODUCTION: External forcing package |
| 13 |
c \bv |
| 14 |
c * The external forcing package, in conjunction with the |
| 15 |
c calendar package (cal), enables the handling of realistic forcing |
| 16 |
c fields of differing temporal forcing patterns. |
| 17 |
c * It comprises climatological restoring and relaxation |
| 18 |
c * Bulk formulae are implemented to convert atmospheric fields |
| 19 |
c to surface fluxes. |
| 20 |
c * An interpolation routine provides on-the-fly interpolation of |
| 21 |
c forcing fields an arbitrary grid onto the model grid. |
| 22 |
c * A list of EXF variables and units is in EXF_FIELDS.h |
| 23 |
c |
| 24 |
C !CALLING SEQUENCE: |
| 25 |
c ... |
| 26 |
c exf_getforcing (TOP LEVEL ROUTINE) |
| 27 |
c | |
| 28 |
c |-- exf_getclim (get climatological fields used e.g. for relax.) |
| 29 |
c | |--- exf_set_climtemp (relax. to 3-D temperature field) |
| 30 |
c | |--- exf_set_climsalt (relax. to 3-D salinity field) |
| 31 |
c | |--- exf_set_climsst (relax. to 2-D SST field) |
| 32 |
c | |--- exf_set_climsss (relax. to 2-D SSS field) |
| 33 |
c | o |
| 34 |
c | |
| 35 |
c |-- exf_getffields <- this one does almost everything |
| 36 |
c | | 1. reads in fields, either flux or atmos. state, |
| 37 |
c | | depending on CPP options (for each variable two fields |
| 38 |
c | | consecutive in time are read in and interpolated onto |
| 39 |
c | | current time step). |
| 40 |
c | | 2. If forcing is atmos. state and control is atmos. state, |
| 41 |
c | | then the control variable anomalies are read here |
| 42 |
c | | * ctrl_getatemp |
| 43 |
c | | * ctrl_getaqh |
| 44 |
c | | * ctrl_getuwind |
| 45 |
c | | * ctrl_getvwind |
| 46 |
c | | If forcing and control are fluxes, then |
| 47 |
c | | controls are added later. |
| 48 |
c | o |
| 49 |
c | |
| 50 |
c |-- exf_check_range |
| 51 |
c | | 1. Check whether read fields are within assumed range |
| 52 |
c | | (may capture mismatches in units) |
| 53 |
c | o |
| 54 |
c | |
| 55 |
c |-- exf_bulkformulae |
| 56 |
c | | 1. Compute net or downwelling radiative fluxes via |
| 57 |
c | | Stefan-Boltzmann law in case only one is known. |
| 58 |
c | | 2. Compute air-sea momentum and buoyancy fluxes from |
| 59 |
c | | atmospheric state following Large and Pond, JPO, 1981/82 |
| 60 |
c | o |
| 61 |
c | |
| 62 |
c |-- < add time-mean river runoff here, if available > |
| 63 |
c | |
| 64 |
c |-- < update tile edges here > |
| 65 |
c | |
| 66 |
c |-- exf_getsurfacefluxes |
| 67 |
c | | 1. If forcing and control are fluxes, then |
| 68 |
c | | controls are added here. |
| 69 |
c | o |
| 70 |
c | |
| 71 |
c |-- < treatment of hflux w.r.t. swflux > |
| 72 |
c | |
| 73 |
c |-- exf_diagnostics_fill |
| 74 |
c | | 1. Do EXF-related diagnostics output here. |
| 75 |
c | o |
| 76 |
c | |
| 77 |
c |-- exf_mapfields |
| 78 |
c | | 1. Map the EXF variables onto the core MITgcm |
| 79 |
c | | forcing fields. |
| 80 |
c | o |
| 81 |
c | |
| 82 |
c |-- exf_bulkformulae |
| 83 |
c | If ALLOW_BULKFORMULAE, compute fluxes via bulkformulae |
| 84 |
c | |
| 85 |
c |-- exf_getsurfacefluxes |
| 86 |
c | If forcing and control is flux, then the |
| 87 |
c | control vector anomalies are read here |
| 88 |
c | * ctrl_getheatflux |
| 89 |
c | * ctrl_getsaltflux |
| 90 |
c | * ctrl_getzonstress |
| 91 |
c | * call ctrl_getmerstress |
| 92 |
c | |
| 93 |
c |-- exf_mapfields |
| 94 |
c | Forcing fields from exf package are mapped onto |
| 95 |
c | mitgcm forcing arrays. |
| 96 |
c | Mapping enables a runtime rescaling of fields |
| 97 |
c |
| 98 |
c \ev |
| 99 |
CEOI |
| 100 |
|
| 101 |
CBOP |
| 102 |
C !ROUTINE: exf_getforcing |
| 103 |
C !INTERFACE: |
| 104 |
subroutine exf_getforcing( mytime, myiter, mythid ) |
| 105 |
|
| 106 |
C !DESCRIPTION: \bv |
| 107 |
c *================================================================= |
| 108 |
c | SUBROUTINE exf_getforcing |
| 109 |
c *================================================================= |
| 110 |
c o Get the forcing fields for the current time step. The switches |
| 111 |
c for the inclusion of the individual forcing components have to |
| 112 |
c be set in EXF_OPTIONS.h (or ECCO_CPPOPTIONS.h). |
| 113 |
c A note on surface fluxes: |
| 114 |
c The MITgcm-UV vertical coordinate z is positive upward. |
| 115 |
c This implies that a positive flux is out of the ocean |
| 116 |
c model. However, the wind stress forcing is not treated |
| 117 |
c this way. A positive zonal wind stress accelerates the |
| 118 |
c model ocean towards the east. |
| 119 |
c started: eckert@mit.edu, heimbach@mit.edu, ralf@ocean.mit.edu |
| 120 |
c mods for pkg/seaice: menemenlis@jpl.nasa.gov 20-Dec-2002 |
| 121 |
c *================================================================= |
| 122 |
c | SUBROUTINE exf_getforcing |
| 123 |
c *================================================================= |
| 124 |
C \ev |
| 125 |
|
| 126 |
C !USES: |
| 127 |
implicit none |
| 128 |
|
| 129 |
#include "EEPARAMS.h" |
| 130 |
#include "SIZE.h" |
| 131 |
#include "PARAMS.h" |
| 132 |
#include "GRID.h" |
| 133 |
|
| 134 |
#include "EXF_PARAM.h" |
| 135 |
#include "EXF_FIELDS.h" |
| 136 |
#include "EXF_CONSTANTS.h" |
| 137 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 138 |
# include "tamc.h" |
| 139 |
#endif |
| 140 |
|
| 141 |
c == global variables == |
| 142 |
|
| 143 |
C !INPUT/OUTPUT PARAMETERS: |
| 144 |
c == routine arguments == |
| 145 |
integer mythid |
| 146 |
integer myiter |
| 147 |
_RL mytime |
| 148 |
|
| 149 |
C !LOCAL VARIABLES: |
| 150 |
c == local variables == |
| 151 |
|
| 152 |
integer bi,bj |
| 153 |
integer i,j,k |
| 154 |
character*(max_len_mbuf) msgbuf |
| 155 |
|
| 156 |
c == end of interface == |
| 157 |
CEOP |
| 158 |
|
| 159 |
c Get values of climatological fields. |
| 160 |
call exf_getclim( mytime, myiter, mythid ) |
| 161 |
|
| 162 |
c Get the surface forcing fields. |
| 163 |
call exf_getffields( mytime, myiter, mythid ) |
| 164 |
#ifndef ALLOW_ATM_WIND |
| 165 |
IF ( stressIsOnCgrid .AND. ustressfile.NE.' ' |
| 166 |
& .AND. vstressfile.NE.' ' ) |
| 167 |
& CALL EXCH_UV_XY_RL( ustress, vstress, .TRUE., myThid ) |
| 168 |
#endif |
| 169 |
|
| 170 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 171 |
# if (defined (ALLOW_AUTODIFF_MONITOR)) |
| 172 |
CALL EXF_ADJOINT_SNAPSHOTS( 2, myTime, myIter, myThid ) |
| 173 |
# endif |
| 174 |
#endif |
| 175 |
|
| 176 |
#ifdef ALLOW_BULKFORMULAE |
| 177 |
c Set radiative fluxes |
| 178 |
call exf_radiation( mytime, myiter, mythid ) |
| 179 |
|
| 180 |
# ifdef ALLOW_AUTODIFF_TAMC |
| 181 |
# ifndef ALLOW_ATM_WIND |
| 182 |
CADJ STORE ustress = comlev1, key=ikey_dynamics, kind=isbyte |
| 183 |
CADJ STORE vstress = comlev1, key=ikey_dynamics, kind=isbyte |
| 184 |
# else |
| 185 |
CADJ STORE uwind = comlev1, key=ikey_dynamics, kind=isbyte |
| 186 |
CADJ STORE vwind = comlev1, key=ikey_dynamics, kind=isbyte |
| 187 |
# endif |
| 188 |
CADJ STORE wspeed = comlev1, key=ikey_dynamics, kind=isbyte |
| 189 |
# endif |
| 190 |
c Set wind fields |
| 191 |
call exf_wind( mytime, myiter, mythid ) |
| 192 |
c Compute turbulent fluxes (and surface stress) from bulk formulae |
| 193 |
call exf_bulkformulae( mytime, myiter, mythid ) |
| 194 |
#endif |
| 195 |
|
| 196 |
c Apply runoff, masks and exchanges |
| 197 |
do bj = mybylo(mythid),mybyhi(mythid) |
| 198 |
do bi = mybxlo(mythid),mybxhi(mythid) |
| 199 |
k = 1 |
| 200 |
do j = 1,sny |
| 201 |
do i = 1,snx |
| 202 |
#ifdef ALLOW_ATM_TEMP |
| 203 |
c Net surface heat flux. |
| 204 |
hflux(i,j,bi,bj) = |
| 205 |
& - hs(i,j,bi,bj) |
| 206 |
& - hl(i,j,bi,bj) |
| 207 |
& + lwflux(i,j,bi,bj) |
| 208 |
#ifndef SHORTWAVE_HEATING |
| 209 |
& + swflux(i,j,bi,bj) |
| 210 |
#endif |
| 211 |
c Salt flux from Precipitation and Evaporation. |
| 212 |
sflux(i,j,bi,bj) = evap(i,j,bi,bj) - precip(i,j,bi,bj) |
| 213 |
#endif /* ALLOW_ATM_TEMP */ |
| 214 |
#ifdef ALLOW_RUNOFF |
| 215 |
sflux(i,j,bi,bj) = sflux(i,j,bi,bj) - runoff(i,j,bi,bj) |
| 216 |
#endif |
| 217 |
|
| 218 |
hflux(i,j,bi,bj) = hflux(i,j,bi,bj)*maskC(i,j,1,bi,bj) |
| 219 |
sflux(i,j,bi,bj) = sflux(i,j,bi,bj)*maskC(i,j,1,bi,bj) |
| 220 |
enddo |
| 221 |
enddo |
| 222 |
enddo |
| 223 |
enddo |
| 224 |
|
| 225 |
c Update the tile edges. |
| 226 |
_EXCH_XY_RL(hflux, mythid) |
| 227 |
_EXCH_XY_RL(sflux, mythid) |
| 228 |
IF ( stressIsOnCgrid ) THEN |
| 229 |
CALL EXCH_UV_XY_RL( ustress, vstress, .TRUE., myThid ) |
| 230 |
ELSE |
| 231 |
CALL EXCH_UV_AGRID_3D_RL(ustress, vstress, .TRUE., 1, myThid) |
| 232 |
ENDIF |
| 233 |
#ifdef SHORTWAVE_HEATING |
| 234 |
_EXCH_XY_RL(swflux, mythid) |
| 235 |
#endif |
| 236 |
#ifdef ATMOSPHERIC_LOADING |
| 237 |
_EXCH_XY_RL(apressure, mythid) |
| 238 |
#endif |
| 239 |
#ifdef ALLOW_ICE_AREAMASK |
| 240 |
_EXCH_XY_RL(areamask, mythid) |
| 241 |
#endif |
| 242 |
|
| 243 |
c Get values of the surface flux anomalies. |
| 244 |
call exf_getsurfacefluxes( mytime, myiter, mythid ) |
| 245 |
|
| 246 |
if ( useExfCheckRange .AND. |
| 247 |
& ( myiter.EQ.nIter0 .OR. debugLevel.GE.debLevC ) ) then |
| 248 |
call exf_check_range( mytime, myiter, mythid ) |
| 249 |
endif |
| 250 |
|
| 251 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 252 |
# if (defined (ALLOW_AUTODIFF_MONITOR)) |
| 253 |
CALL EXF_ADJOINT_SNAPSHOTS( 1, myTime, myIter, myThid ) |
| 254 |
# endif |
| 255 |
#endif |
| 256 |
|
| 257 |
#ifdef SHORTWAVE_HEATING |
| 258 |
c Treatment of qnet |
| 259 |
c The location of te summation of Qnet in exf_mapfields is unfortunate. |
| 260 |
c For backward compatibility issues we want it to happen after |
| 261 |
c applying control variables, but before exf_diagnostics_fill. |
| 262 |
c Therefore, we do it exactly here: |
| 263 |
do bj = mybylo(mythid),mybyhi(mythid) |
| 264 |
do bi = mybxlo(mythid),mybxhi(mythid) |
| 265 |
do j = 1-oLy,sNy+oLy |
| 266 |
do i = 1-oLx,sNx+oLx |
| 267 |
hflux(i,j,bi,bj) = hflux(i,j,bi,bj) + swflux(i,j,bi,bj) |
| 268 |
enddo |
| 269 |
enddo |
| 270 |
enddo |
| 271 |
enddo |
| 272 |
#endif |
| 273 |
|
| 274 |
c Diagnostics output |
| 275 |
call exf_diagnostics_fill( mytime, myiter, mythid ) |
| 276 |
|
| 277 |
c Monitor output |
| 278 |
call exf_monitor( mytime, myiter, mythid ) |
| 279 |
|
| 280 |
c Map the forcing fields onto the corresponding model fields. |
| 281 |
call exf_mapfields( mytime, myiter, mythid ) |
| 282 |
|
| 283 |
#ifdef ALLOW_AUTODIFF_TAMC |
| 284 |
# if (defined (ALLOW_AUTODIFF_MONITOR)) |
| 285 |
if ( .NOT. useSEAICE ) |
| 286 |
& CALL EXF_ADJOINT_SNAPSHOTS( 3, myTime, myIter, myThid ) |
| 287 |
# endif |
| 288 |
#endif |
| 289 |
|
| 290 |
end |
| 291 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph