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C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_getforcing.F,v 1.46 2014/06/05 15:37:46 jmc Exp $ |
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C $Name: $ |
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|
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#include "EXF_OPTIONS.h" |
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#ifdef ALLOW_AUTODIFF |
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# include "AUTODIFF_OPTIONS.h" |
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#endif |
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|
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CBOI |
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C |
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C !TITLE: EXTERNAL FORCING |
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C !AUTHORS: mitgcm developers ( mitgcm-support@mitgcm.org ) |
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C !AFFILIATION: Massachussetts Institute of Technology |
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C !DATE: |
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C !INTRODUCTION: External forcing package |
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C \bv |
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C * The external forcing package, in conjunction with the |
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C calendar package (cal), enables the handling of realistic forcing |
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C fields of differing temporal forcing patterns. |
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C * It comprises climatological restoring and relaxation |
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C * Bulk formulae are implemented to convert atmospheric fields |
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C to surface fluxes. |
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C * An interpolation routine provides on-the-fly interpolation of |
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C forcing fields an arbitrary grid onto the model grid. |
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C * A list of EXF variables and units is in EXF_FIELDS.h |
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C |
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C !CALLING SEQUENCE: |
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C ... |
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C exf_getforcing (TOP LEVEL ROUTINE) |
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C | |
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C |-- exf_getclim (get climatological fields used e.g. for relax.) |
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C | |--- exf_set_climtemp (relax. to 3-D temperature field) |
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C | |--- exf_set_climsalt (relax. to 3-D salinity field) |
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C | |--- exf_set_climsst (relax. to 2-D SST field) |
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C | |--- exf_set_climsss (relax. to 2-D SSS field) |
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C | o |
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C | |
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C |-- exf_getffields <- this one does almost everything |
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C | | 1. reads in fields, either flux or atmos. state, |
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C | | depending on CPP options (for each variable two fields |
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C | | consecutive in time are read in and interpolated onto |
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C | | current time step). |
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C | | 2. If forcing is atmos. state and control is atmos. state, |
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C | | then the control variable anomalies are read here |
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C | | * ctrl_getatemp |
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C | | * ctrl_getaqh |
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C | | * ctrl_getuwind |
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C | | * ctrl_getvwind |
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C | | If forcing and control are fluxes, then |
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C | | controls are added later. |
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C | o |
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C | |
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C |-- exf_check_range |
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C | | 1. Check whether read fields are within assumed range |
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C | | (may capture mismatches in units) |
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C | o |
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C | |
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C |-- exf_bulkformulae |
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C | | 1. Compute net or downwelling radiative fluxes via |
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C | | Stefan-Boltzmann law in case only one is known. |
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C | | 2. Compute air-sea momentum and buoyancy fluxes from |
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C | | atmospheric state following Large and Pond, JPO, 1981/82 |
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C | o |
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C | |
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C |-- < add time-mean river runoff here, if available > |
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C | |
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C |-- < update tile edges here > |
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C | |
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C |-- exf_getsurfacefluxes |
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C | | 1. If forcing and control are fluxes, then |
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C | | controls are added here. |
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C | o |
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C | |
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C |-- < treatment of hflux w.r.t. swflux > |
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C | |
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C |-- exf_diagnostics_fill |
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C | | 1. Do EXF-related diagnostics output here. |
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C | o |
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C | |
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C |-- exf_mapfields |
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C | | 1. Map the EXF variables onto the core MITgcm |
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C | | forcing fields. |
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C | o |
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C | |
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C |-- exf_bulkformulae |
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C | If ALLOW_BULKFORMULAE, compute fluxes via bulkformulae |
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C | |
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C |-- exf_getsurfacefluxes |
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C | If forcing and control is flux, then the |
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C | control vector anomalies are read here |
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C | * ctrl_getheatflux |
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C | * ctrl_getsaltflux |
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C | * ctrl_getzonstress |
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C | * CALL ctrl_getmerstress |
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C | |
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C |-- exf_mapfields |
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C | Forcing fields from exf package are mapped onto |
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C | mitgcm forcing arrays. |
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C | Mapping enables a runtime rescaling of fields |
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C |
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C \ev |
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CEOI |
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|
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CBOP |
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C !ROUTINE: EXF_GETFORCING |
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C !INTERFACE: |
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SUBROUTINE EXF_GETFORCING( myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: \bv |
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C *================================================================= |
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C | SUBROUTINE EXF_GETFORCING |
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C *================================================================= |
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C o Get the forcing fields for the current time step. The switches |
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C for the inclusion of the individual forcing components have to |
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C be set in EXF_OPTIONS.h (or ECCO_CPPOPTIONS.h). |
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C A note on surface fluxes: |
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C The MITgcm-UV vertical coordinate z is positive upward. |
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C This implies that a positive flux is out of the ocean |
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C model. However, the wind stress forcing is not treated |
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C this way. A positive zonal wind stress accelerates the |
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C model ocean towards the east. |
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C started: eckert@mit.edu, heimbach@mit.edu, ralf@ocean.mit.edu |
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C mods for pkg/seaice: menemenlis@jpl.nasa.gov 20-Dec-2002 |
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C *================================================================= |
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C | SUBROUTINE EXF_GETFORCING |
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C *================================================================= |
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C \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C == global variables == |
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#include "EEPARAMS.h" |
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#include "SIZE.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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|
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#include "EXF_PARAM.h" |
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#include "EXF_FIELDS.h" |
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#include "EXF_CONSTANTS.h" |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == routine arguments == |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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|
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C !LOCAL VARIABLES: |
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C == local variables == |
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INTEGER bi,bj |
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INTEGER i,j,k |
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C == end of interface == |
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CEOP |
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|
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C Get values of climatological fields. |
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CALL exf_getclim( myTime, myIter, myThid ) |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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# ifdef ALLOW_ATM_TEMP |
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CADJ STORE precip0 = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE precip1 = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE snowprecip0 = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE snowprecip1 = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif |
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#endif |
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C Get the surface forcing fields. |
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CALL exf_getffields( myTime, myIter, myThid ) |
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IF ( .NOT.useAtmWind ) THEN |
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IF ( stressIsOnCgrid .AND. ustressfile.NE.' ' |
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& .AND. vstressfile.NE.' ' ) |
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& CALL EXCH_UV_XY_RL( ustress, vstress, .TRUE., myThid ) |
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ENDIF |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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# ifdef ALLOW_AUTODIFF_MONITOR |
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CALL EXF_ADJOINT_SNAPSHOTS( 2, myTime, myIter, myThid ) |
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# endif |
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#endif |
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|
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#ifdef ALLOW_BULKFORMULAE |
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C Set radiative fluxes |
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CALL exf_radiation( myTime, myIter, myThid ) |
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|
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# ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE ustress = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vstress = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE uwind = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vwind = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE wspeed = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif |
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C Set wind fields |
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CALL exf_wind( myTime, myIter, myThid ) |
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# ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE ustress = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vstress = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE uwind = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE vwind = comlev1, key=ikey_dynamics, kind=isbyte |
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CADJ STORE wspeed = comlev1, key=ikey_dynamics, kind=isbyte |
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# endif |
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C Compute turbulent fluxes (and surface stress) from bulk formulae |
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CALL exf_bulkformulae( myTime, myIter, myThid ) |
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#endif |
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|
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C Apply runoff, masks and exchanges |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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k = 1 |
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DO j = 1,sNy |
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DO i = 1,sNx |
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#ifdef ALLOW_ATM_TEMP |
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C Net surface heat flux. |
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hflux(i,j,bi,bj) = |
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& - hs(i,j,bi,bj) |
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& - hl(i,j,bi,bj) |
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& + lwflux(i,j,bi,bj) |
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#ifndef SHORTWAVE_HEATING |
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& + swflux(i,j,bi,bj) |
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#endif |
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C fresh-water flux from Precipitation and Evaporation. |
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sflux(i,j,bi,bj) = evap(i,j,bi,bj) - precip(i,j,bi,bj) |
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#endif /* ALLOW_ATM_TEMP */ |
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#ifdef ALLOW_RUNOFF |
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sflux(i,j,bi,bj) = sflux(i,j,bi,bj) - runoff(i,j,bi,bj) |
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#endif |
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hflux(i,j,bi,bj) = hflux(i,j,bi,bj)*maskC(i,j,1,bi,bj) |
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sflux(i,j,bi,bj) = sflux(i,j,bi,bj)*maskC(i,j,1,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C Update the tile edges: needed for some EXF fields involved in horizontal |
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C averaging, e.g., wind-stress; fields used by main model or other pkgs |
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C are exchanged in EXF_MAPFIELDS. |
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c _EXCH_XY_RL(hflux, myThid) |
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c _EXCH_XY_RL(sflux, myThid) |
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IF ( stressIsOnCgrid ) THEN |
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CALL EXCH_UV_XY_RL( ustress, vstress, .TRUE., myThid ) |
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ELSE |
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CALL EXCH_UV_AGRID_3D_RL(ustress, vstress, .TRUE., 1, myThid) |
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ENDIF |
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#ifdef SHORTWAVE_HEATING |
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c _EXCH_XY_RL(swflux, myThid) |
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#endif |
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#ifdef ATMOSPHERIC_LOADING |
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c _EXCH_XY_RL(apressure, myThid) |
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#endif |
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#ifdef EXF_SEAICE_FRACTION |
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c _EXCH_XY_RL(areamask, myThid) |
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#endif |
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|
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C Get values of the surface flux anomalies. |
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CALL exf_getsurfacefluxes( myTime, myIter, myThid ) |
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|
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IF ( useExfCheckRange .AND. |
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& ( myIter.EQ.nIter0 .OR. exf_debugLev.GE.debLevC ) ) THEN |
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CALL exf_check_range( myTime, myIter, myThid ) |
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ENDIF |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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# ifdef ALLOW_AUTODIFF_MONITOR |
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CALL EXF_ADJOINT_SNAPSHOTS( 1, myTime, myIter, myThid ) |
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# endif |
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#endif |
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|
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#ifdef SHORTWAVE_HEATING |
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C Treatment of qnet |
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C The location of te summation of Qnet in exf_mapfields is unfortunate. |
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C For backward compatibility issues we want it to happen after |
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C applying control variables, but before exf_diagnostics_fill. |
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C Therefore, we DO it exactly here: |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO j = 1-oLy,sNy+oLy |
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DO i = 1-oLx,sNx+oLx |
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hflux(i,j,bi,bj) = hflux(i,j,bi,bj) + swflux(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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#endif |
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|
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C Diagnostics output |
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CALL exf_diagnostics_fill( myTime, myIter, myThid ) |
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|
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C Monitor output |
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CALL exf_monitor( myTime, myIter, myThid ) |
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|
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C Map the forcing fields onto the corresponding model fields. |
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CALL exf_mapfields( myTime, myIter, myThid ) |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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# ifdef ALLOW_AUTODIFF_MONITOR |
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IF ( .NOT. useSEAICE ) |
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& CALL EXF_ADJOINT_SNAPSHOTS( 3, myTime, myIter, myThid ) |
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# endif |
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#endif |
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|
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RETURN |
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END |
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