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C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_radiation.F,v 1.4 2007/09/27 09:41:13 mlosch Exp $ |
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C $Name: $ |
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#include "EXF_OPTIONS.h" |
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SUBROUTINE EXF_RADIATION(myTime, myIter, myThid) |
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C ================================================================== |
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C SUBROUTINE exf_radiation |
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C ================================================================== |
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C |
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C o Set radiative fluxes at the surface. |
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C |
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C ================================================================== |
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C SUBROUTINE exf_radiation |
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C ================================================================== |
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IMPLICIT NONE |
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C == global variables == |
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|
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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 "DYNVARS.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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|
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C == routine arguments == |
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|
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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#ifdef ALLOW_DOWNWARD_RADIATION |
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C == local variables == |
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|
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INTEGER bi,bj |
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INTEGER i,j |
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#ifdef ALLOW_ATM_TEMP |
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INTEGER k |
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_RL Tsf, SSTtmp, TsfSq |
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#endif |
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C == end of interface == |
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C-- Use atmospheric state to compute surface fluxes. |
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|
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C-- Compute net from downward and downward from net longwave and |
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C shortwave radiation, IF needed. |
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C lwflux = Stefan-Boltzmann constant * emissivity * SST - lwdown |
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C swflux = - ( 1 - albedo ) * swdown |
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|
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#ifdef ALLOW_ATM_TEMP |
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k = 1 |
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|
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IF ( lwfluxfile .EQ. ' ' .AND. lwdownfile .NE. ' ' ) THEN |
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C Loop over tiles. |
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DO bj = myByLo(myThid),myByHi(myThid) |
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DO bi = myBxLo(myThid),myBxHi(myThid) |
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|
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IF ( sstExtrapol.GT.0. _d 0 ) THEN |
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DO j = 1,sNy |
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DO i = 1,sNx |
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Tsf = theta(i,j,1,bi,bj) + cen2kel |
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SSTtmp = sstExtrapol |
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& *( theta(i,j,1,bi,bj)-theta(i,j,2,bi,bj) ) |
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& * maskC(i,j,2,bi,bj) |
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Tsf = Tsf + MAX( SSTtmp, 0. _d 0 ) |
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TsfSq = Tsf*Tsf |
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lwflux(i,j,bi,bj) = |
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& ocean_emissivity*stefanBoltzmann*TsfSq*TsfSq |
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& - lwdown(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ELSE |
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DO j = 1,sNy |
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DO i = 1,sNx |
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lwflux(i,j,bi,bj) = |
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& ocean_emissivity*stefanBoltzmann* |
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& ((theta(i,j,k,bi,bj)+cen2kel)**4) |
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& - lwdown(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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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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ENDIF |
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|
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C-jmc: commented out: no need to compute Downward-LW (not used) from Net-LW |
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c IF ( lwfluxfile .NE. ' ' .AND. lwdownfile .EQ. ' ' ) THEN |
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C Loop over tiles. |
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c DO bj = myByLo(myThid),myByHi(myThid) |
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c DO bi = myBxLo(myThid),myBxHi(myThid) |
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c DO j = 1,sNy |
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c DO i = 1,sNx |
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c lwdown(i,j,bi,bj) = |
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c & ocean_emissivity*stefanBoltzmann* |
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c & ((theta(i,j,k,bi,bj)+cen2kel)**4) |
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c & - lwflux(i,j,bi,bj) |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDIF |
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#endif /* ALLOW_ATM_TEMP */ |
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|
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#if defined(ALLOW_ATM_TEMP) || defined(SHORTWAVE_HEATING) |
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IF ( swfluxfile .EQ. ' ' .AND. swdownfile .NE. ' ' ) 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,sNy |
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DO i = 1,sNx |
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swflux(i,j,bi,bj) = -(1.0-exf_albedo) * swdown(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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C-jmc: commented out: no need to compute Downward-SW (not used) from Net-SW |
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c IF ( swfluxfile .NE. ' ' .AND. swdownfile .EQ. ' ' ) THEN |
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c DO bj = myByLo(myThid),myByHi(myThid) |
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c DO bi = myBxLo(myThid),myBxHi(myThid) |
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c DO j = 1,sNy |
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c DO i = 1,sNx |
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c swdown(i,j,bi,bj) = -swflux(i,j,bi,bj) / (1.0-exf_albedo) |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDIF |
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#endif |
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|
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#endif /* ALLOW_DOWNWARD_RADIATION */ |
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|
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RETURN |
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END |
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