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C $Header: $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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SUBROUTINE INI_P_GROUND( |
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I Hfld, |
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O Pfld, |
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I myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE INI_P_GROUND | |
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C | o Convert Topography [m] to (reference) Surface Pressure | |
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C | according to tRef profile, | |
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C | using same discretisation as in calc_phi_hyd | |
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C | | |
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C \==========================================================/ |
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IMPLICIT NONE |
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C == Global variables == |
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#include "SIZE.h" |
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#include "GRID.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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|
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C == Routine arguments == |
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C Hfld (input) : Ground elevation [m] |
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C Pfld (output) : reference Pressure at the ground [Pa] |
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_RS Hfld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS Pfld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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INTEGER myThid |
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|
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c #ifdef INCLUDE_PHIHYD_CALCULATION_CODE |
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|
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C == Local variables == |
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INTEGER bi,bj,i,j,K, Ks |
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_RL ddPI, Po_surf |
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_RL phiRef(2*Nr+1), rHalf(2*Nr+1) |
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|
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DO K=1,Nr |
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rHalf(2*K-1) = rF(K) |
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rHalf(2*K) = rC(K) |
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ENDDO |
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rHalf(2*Nr+1) = rF(Nr+1) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C- Compute Reference Geopotential at Half levels : |
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C Tracer level: phiRef(2K) ; Interface_W level: phiRef(2K+1) |
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|
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phiRef(1) = 0. |
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|
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IF (Integr_GeoPot.EQ.1) THEN |
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C- Finite Volume Form, linear by half level : |
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DO K=1,2*Nr |
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Ks = (K+1)/2 |
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ddPI=atm_cp*( ((rHalf( K )/atm_po)**atm_kappa) |
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& -((rHalf(K+1)/atm_po)**atm_kappa) ) |
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phiRef(K+1) = phiRef(K)+ddPI*tRef(Ks) |
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ENDDO |
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C------ |
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ELSE |
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C- Finite Difference Form, linear between Tracer level : |
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C works with Integr_GeoPot = 0, 2 or 3 |
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K = 1 |
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ddPI=atm_cp*( ((rF(K)/atm_po)**atm_kappa) |
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& -((rC(K)/atm_po)**atm_kappa) ) |
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phiRef(2*K) = phiRef(1) + ddPI*tRef(K) |
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DO K=1,Nr-1 |
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ddPI=atm_cp*( ((rC( K )/atm_po)**atm_kappa) |
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& -((rC(K+1)/atm_po)**atm_kappa) ) |
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phiRef(2*K+1) = phiRef(2*K) + ddPI*0.5*tRef(K) |
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phiRef(2*K+2) = phiRef(2*K) |
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& + ddPI*0.5*(tRef(K)+tRef(K+1)) |
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ENDDO |
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K = Nr |
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ddPI=atm_cp*( ((rC( K )/atm_po)**atm_kappa) |
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& -((rF(K+1)/atm_po)**atm_kappa) ) |
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phiRef(2*K+1) = phiRef(2*K) + ddPI*tRef(K) |
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C------ |
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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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|
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C- Convert phiRef to Z unit : |
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DO K=1,2*Nr+1 |
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phiRef(K) = phiRef(K)*recip_gravity |
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ENDDO |
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|
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C- Write to check : |
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write(6,'(2A)') 'INI_P_GROUND: PhiRef/g [m] at Center ', |
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& '(integer) and Interface (half-int.) levels:' |
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DO K=1,2*Nr+1 |
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write(6,'(A,F5.1,A,F10.1,A,F12.3)') ' K=', K*0.5, |
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& ' ; r=', rHalf(K), ' ; phiRef/g=', phiRef(K) |
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ENDDO |
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|
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C- Find Po_surf : Linear between 2 half levels : |
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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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Ks = 1 |
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DO K=1,2*Nr |
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IF (Hfld(i,j,bi,bj).GE.phiRef(K)) Ks = K |
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ENDDO |
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Po_surf = rHalf(Ks) + (rHalf(Ks+1)-rHalf(Ks))* |
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& (Hfld(i,j,bi,bj)-phiRef(Ks))/(phiRef(Ks+1)-phiRef(Ks)) |
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|
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c IF (Hfld(i,j,bi,bj).LT.phiRef(1)) Po_surf= rHalf(1) |
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c IF (Hfld(i,j,bi,bj).GT.phiRef(2*Nr+1)) Po_surf= rHalf(2*Nr+1) |
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Pfld(i,j,bi,bj) = Po_surf |
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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---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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c #endif/* INCLUDE_PHIHYD_CALCULATION_CODE */ |
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|
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RETURN |
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END |
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