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C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/aim_fields_load.F,v 1.3 2004/11/14 19:54:01 jmc Exp $ |
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C $Name: $ |
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|
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#include "AIM_OPTIONS.h" |
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|
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CStartOfInterface |
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SUBROUTINE AIM_FIELDS_LOAD( |
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I myTime, myIter, myThid ) |
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C *==========================================================* |
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C | SUBROUTINE AIM_FIELDS_LOAD |
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C | o Control reading of AIM fields from external source. |
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C *==========================================================* |
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C | Loads surface boundary condition datasets for AIM. |
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C | The routine is called every timetep and periodically |
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C | loads a set of external fields. |
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C | Monthly climatology files are read either for |
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C | a) a direct use (useMMsurfFc): |
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C | Albedo, Soil moisture, Surface Temperature |
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C | b) time interpolation (useFMsurfBC): |
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C | Sea & Land surf. Temp, snow, sea-ice, soil-water (2-lev) |
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C | + (1rst.iter) ground albedo, vegetation, land-sea fraction |
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C | Most of the work is done by the master the thread while |
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C | the other threads spin. |
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C *==========================================================* |
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IMPLICIT NONE |
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|
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C === Global variables === |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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#include "AIM_PARAMS.h" |
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c #include "AIM_GRID.h" |
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#include "AIM_FFIELDS.h" |
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|
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C === Routine arguments === |
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C myThid - Thread no. that called this routine. |
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C myTime - Simulation time |
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C myIter - Simulation timestep number |
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INTEGER myThid |
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_RL myTime |
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INTEGER myIter |
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CEndOfInterface |
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|
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C === Functions === |
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|
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#ifdef ALLOW_AIM |
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C === Local variables === |
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C bi,bj, i,j - Loop counters |
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C tYear - Fraction within year of myTime |
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C mnthIndex - Current time in whole months |
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C prevMnthIndex |
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C fNam - Strings used in constructing file names |
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C mnthNam |
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C pfact - used to convert Pot.Temp. to in-situ Temp. |
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INTEGER bi,bj, i, j |
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c _RL pfact |
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INTEGER prevMnthIndex |
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DATA prevMnthIndex / 0 / |
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SAVE prevMnthIndex |
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C-- for use with useMMsurfFc: |
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_RL tYear, yearLength |
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INTEGER mnthIndex |
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CHARACTER*(MAX_LEN_FNAM) fNam |
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CHARACTER*3 mnthNam(12) |
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DATA mnthNam / |
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& 'jan', 'feb', 'mar', 'apr', 'may', 'jun', |
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& 'jul', 'aug', 'sep', 'oct', 'nov', 'dec' / |
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SAVE mnthNam |
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C-- for use with useFMsurfBC: |
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INTEGER aim_surfForc_NppCycle, nm0, nm1, nm2, nm3 |
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_RL aim_surfForc_TimePeriod, aim_surfForc_TransRatio |
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_RL t0prd, tNcyc, tmprd, dTprd |
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|
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IF (aim_useMMsurfFc) THEN |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- Use Monthly Mean surface forcing fields: |
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|
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C- Calculate offset into a year |
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c tYear = myTime/(86400.*360.) - |
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c & FLOAT(INT(myTime/(86400.*360.))) |
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yearLength = 86400.*360. |
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tYear = MOD(myTime/yearLength, 1. _d 0) |
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mnthIndex = INT(tYear*12.)+1 |
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|
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IF ( mnthIndex .NE. prevMnthIndex .OR. |
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& myIter.EQ.nIter0 ) THEN |
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C- New month so load in data |
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|
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C Prevent loading of new data before everyone has finished with it |
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CALL BAR2(myThid) |
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|
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C Master thread coordinates loading of AIM datasets |
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_BEGIN_MASTER( myThid ) |
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prevMnthIndex = mnthIndex |
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|
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C o Albedo ( convert % to fraction ) |
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WRITE(fNam,'(A,A,A)' ) 'salb.', |
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& mnthNam(mnthIndex), aim_MMsufx(1:aim_MMsufxLength) |
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CALL MDSREADFIELD(fNam,readBinaryPrec,'RS',1, |
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O aim_albedo, |
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I 1,myThid) |
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|
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C o Surface temperature ( in kelvin ) |
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IF (aim_surfPotTemp) THEN |
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WRITE(fNam,'(A,A,A)' ) 'stheta.', |
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& mnthNam(mnthIndex), aim_MMsufx(1:aim_MMsufxLength) |
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ELSE |
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WRITE(fNam,'(A,A,A)' ) 'sTemp.', |
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& mnthNam(mnthIndex), aim_MMsufx(1:aim_MMsufxLength) |
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ENDIF |
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CALL MDSREADFIELD(fNam,readBinaryPrec,'RS',1, |
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O aim_surftemp, |
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I 1,myThid) |
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|
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C o Soil moisture |
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WRITE(fNam,'(A,A,A)' ) 'smoist.', |
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& mnthNam(mnthIndex), aim_MMsufx(1:aim_MMsufxLength) |
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CALL MDSREADFIELD(fNam,readBinaryPrec,'RS',1, |
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O aim_soilWater, |
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I 1,myThid) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Converts fields for direct use in Atmos. Physics routine. |
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C better here rather than in "aim_do_atmos" since: |
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C a) change together conversion factor and input file name. |
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C b) conversion applied only 1 time / month ; |
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C c) easy to check here (variable in common). |
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|
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DO bj=1,nSy |
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DO bi=1,nSx |
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|
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C- Converts surface albedo : input data is in % 0-100 |
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C and Franco s package needs a fraction between 0-1 |
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DO j=1,sNy |
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DO i=1,sNx |
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aim_albedo(I,J,bi,bj) = aim_albedo(I,J,bi,bj)/100. |
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ENDDO |
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ENDDO |
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|
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C- Converts soil moisture (case input is in cm in bucket of depth 20cm.) |
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c DO j=1,sNy |
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c DO i=1,sNx |
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c aim_soilWater(I,J,bi,bj) = aim_soilWater(I,J,bi,bj) |
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c & /20. |
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c ENDDO |
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c ENDDO |
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|
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C-- Correct for truncation (because of hFacMin) of surface reference |
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C pressure Ro_surf that affects Surf.Temp. : |
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DO j=1,sNy |
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DO i=1,sNx |
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c pfact = (Ro_surf(i,j,bi,bj)/atm_Po)**atm_kappa |
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aim_surftemp(i,j,bi,bj) = aim_surftemp(i,j,bi,bj) |
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& * truncSurfP(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- end bi,bj loops |
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ENDDO |
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ENDDO |
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|
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IF (myIter.EQ.nIter0) |
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& CALL WRITE_FLD_XY_RL('aim_Tsurf',' ',aim_surfTemp,0,myThid) |
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|
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_END_MASTER( myThid ) |
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C Stop anyone leaving until all data is read |
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CALL BAR2(myThid) |
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|
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C- endif New month - load in data |
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ENDIF |
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|
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ELSEIF (aim_useFMsurfBC) THEN |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- Use Franco Molteni surface BC: |
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C take part of S/R INFORC + part of S/R FORDATE (albedo) |
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C of the F.Molteni SPEEDY code (ver23) |
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|
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IF ( myIter.EQ.nIter0 ) THEN |
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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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c aim_landFr(i,j,bi,bj)= 0. |
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aim_albedo(i,j,bi,bj)= 0. |
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aim_veget(i,j,bi,bj) = 0. |
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aim_sst0(i,j,bi,bj) =300. |
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aim_lst0(i,j,bi,bj) =300. |
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aim_oic0(i,j,bi,bj) = 0. |
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aim_snw0(i,j,bi,bj) = 0. |
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aim_sw10(i,j,bi,bj) = 0. |
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aim_sw20(i,j,bi,bj) = 0. |
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aim_sst1(i,j,bi,bj) =300. |
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aim_lst1(i,j,bi,bj) =300. |
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aim_oic1(i,j,bi,bj) = 0. |
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aim_snw1(i,j,bi,bj) = 0. |
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aim_sw11(i,j,bi,bj) = 0. |
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aim_sw21(i,j,bi,bj) = 0. |
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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- Length (s) of one time period: |
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aim_surfForc_TimePeriod = 30.*86400. |
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C- Number of time period per Cycle: |
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aim_surfForc_NppCycle = 12 |
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C- define how fast the (linear) transition is from one month to the next |
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C = 1 -> linear between 2 midle month |
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C > TimePeriod/deltaT -> jump from one month to the next one |
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aim_surfForc_TransRatio = 1. |
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|
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t0prd = myTime / aim_surfForc_TimePeriod |
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tNcyc = aim_surfForc_NppCycle |
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tmprd = t0prd - 0.5 _d 0 + tNcyc |
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tmprd = MOD(tmprd,tNcyc) |
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C- indices of previous month and next month: |
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nm0 = 1 + INT(tmprd) |
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nm1 = 1 + MOD(nm0,aim_surfForc_NppCycle) |
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C- interpolation weight: |
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dTprd = tmprd - (nm0 - 1) |
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aim_sWght1 = 0.5 _d 0+(dTprd-0.5 _d 0)*aim_surfForc_TransRatio |
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aim_sWght1 = MAX( 0. _d 0, MIN(1. _d 0, aim_sWght1) ) |
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aim_sWght0 = 1. _d 0 - aim_sWght1 |
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|
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IF (myIter.EQ.nIter0 .OR. nm0.NE.prevMnthIndex) THEN |
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C- Load new data: |
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|
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C Prevent loading of new data before everyone has finished with it |
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CALL BAR2(myThid) |
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|
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C Master thread coordinates loading of AIM datasets |
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_BEGIN_MASTER( myThid ) |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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prevMnthIndex = nm0 |
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|
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IF ( myIter.EQ.nIter0 ) THEN |
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C-- Load Fixed Forcing only at the 1rst iter: |
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|
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c IF ( aim_LandFile .NE. ' ' ) THEN |
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c CALL READ_REC_XY_RS(aim_LandFile,aim_landFr,1,myIter,myThid) |
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c ENDIF |
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IF ( aim_albFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_albFile,aim_albedo, 1,myIter,myThid) |
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ENDIF |
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c alb0(i,j) = 0.01*r4inp(i,j) |
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IF ( aim_vegFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_vegFile,aim_veget,1,myIter,myThid) |
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ENDIF |
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|
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DO bj=1,nSy |
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DO bi=1,nSx |
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|
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C- Converts surface albedo : from % (input data) to a fraction [0-1} |
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c alb0(i,j) = 0.01*r4inp(i,j) |
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DO j=1,sNy |
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DO i=1,sNx |
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aim_albedo(i,j,bi,bj) = aim_albedo(I,J,bi,bj)/100. _d 0 |
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ENDDO |
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ENDDO |
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|
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C- Converts vegetation fraction: from % (input data) to a fraction [0-1] |
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c veg(i,j)=max(0.,0.01*veg(i,j)) |
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DO j=1,sNy |
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DO i=1,sNx |
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aim_veget(i,j,bi,bj) = |
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& MAX(0. _d 0, aim_veget(i,j,bi,bj)/100. _d 0) |
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ENDDO |
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ENDDO |
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|
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ENDDO |
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ENDDO |
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|
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C-- endif 1rst iter. |
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ENDIF |
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|
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IF ( aim_sstFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_sstFile,aim_sst0,nm0,myIter,myThid) |
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CALL READ_REC_XY_RS(aim_sstFile,aim_sst1,nm1,myIter,myThid) |
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ENDIF |
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IF ( aim_lstFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_lstFile,aim_lst0,nm0,myIter,myThid) |
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CALL READ_REC_XY_RS(aim_lstFile,aim_lst1,nm1,myIter,myThid) |
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ENDIF |
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IF ( aim_oiceFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_oiceFile,aim_oic0,nm0,myIter,myThid) |
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CALL READ_REC_XY_RS(aim_oiceFile,aim_oic1,nm1,myIter,myThid) |
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ENDIF |
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IF ( aim_snowFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_snowFile,aim_snw0,nm0,myIter,myThid) |
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CALL READ_REC_XY_RS(aim_snowFile,aim_snw1,nm1,myIter,myThid) |
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ENDIF |
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IF ( aim_swcFile .NE. ' ' ) THEN |
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CALL READ_REC_XY_RS(aim_swcFile,aim_sw10,nm0,myIter,myThid) |
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CALL READ_REC_XY_RS(aim_swcFile,aim_sw11,nm1,myIter,myThid) |
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nm2 = nm0 + aim_surfForc_NppCycle |
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nm3 = nm1 + aim_surfForc_NppCycle |
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CALL READ_REC_XY_RS(aim_swcFile,aim_sw20,nm2,myIter,myThid) |
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CALL READ_REC_XY_RS(aim_swcFile,aim_sw21,nm3,myIter,myThid) |
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ENDIF |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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_END_MASTER( myThid ) |
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|
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C Stop anyone leaving until all data is read |
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CALL BAR2(myThid) |
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|
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C-- Correct for truncation (because of hFacMin) of surface reference |
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C pressure Ro_surf that affects Surf.Temp. : |
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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,sNy |
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DO i=1,sNx |
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c pfact = (Ro_surf(i,j,bi,bj)/atm_Po)**atm_kappa |
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aim_lst0(i,j,bi,bj) = aim_lst0(i,j,bi,bj) |
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& * truncSurfP(i,j,bi,bj) |
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aim_lst1(i,j,bi,bj) = aim_lst1(i,j,bi,bj) |
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& * truncSurfP(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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|
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C- endif load new data. |
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ENDIF |
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|
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ENDIF |
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|
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#endif /* ALLOW_AIM */ |
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|
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RETURN |
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END |
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