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C $Header: /u/gcmpack/models/MITgcmUV/model/src/ini_linear_phisurf.F,v 1.1 2001/07/06 21:39:37 jmc Exp $ |
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C $Name: $ |
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#include "CPP_OPTIONS.h" |
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SUBROUTINE INI_LINEAR_PHISURF( myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE INI_LINEAR_PHISURF | |
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C | o Initialise the Linear Relation Phi_surf(eta) | |
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C |==========================================================| |
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C | Presently: Initialise -Boyancy at surface level (Bo_surf)| |
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C | to setup the Linear relation: Phi_surf(eta)=Bo_surf*eta | |
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C | Futur: might add other things for Non-Linear FreeSurface | |
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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 "SURFACE.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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INTEGER myThid |
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C === Local variables === |
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C bi,bj - Loop counters |
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C I,J,K |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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INTEGER bi, bj |
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INTEGER I, J, K |
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_RL dPIdp |
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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-- Initialise -Boyancy at surface level : Bo_surf |
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C Bo_surf is defined as d/dr(Phi_surf) and set to g/rtoz (linear free surface) |
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C with rtoz = conversion factor from r-unit to z-unit (=horiVertRatio) |
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C an accurate formulation includes P_surf and T,S_surf effects on rho_surf: |
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C (setting uniformLin_PhiSurf=.FALSE.): |
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C z-ocean (rtoz=1) : Bo_surf = - Boyancy = gravity * rho_surf/rho_0 |
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C p-atmos (rtoz=rho_c*g) : Bo_surf = (1/rho)_surf |
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C Note on Phi_surf splitting : Non-linear Time-dependent effects on b_surf |
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C [through eta & (T-tRef)_surf] are included in PhiHyd rather than in Bo_surf |
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C-- |
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IF ( buoyancyRelation .eq. 'OCEANIC' ) THEN |
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C- gBaro = gravity (except for External mode test with reduced gravity) |
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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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Bo_surf(I,J,bi,bj) = gBaro |
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recip_Bo(I,J,bi,bj) = 1. _d 0 / gBaro |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSEIF ( uniformLin_PhiSurf ) THEN |
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C- use a linear (in ps) uniform relation : Phi'_surf = 1/rhoConst * ps'_surf |
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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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Bo_surf(I,J,bi,bj) = recip_rhoConst |
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recip_Bo(I,J,bi,bj) = rhoConst |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSE |
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C- use a linearized (in ps) Non-uniform relation : Bo_surf(Po_surf,tRef_surf) |
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C--- Bo = d/d_p(Phi_surf) = tRef_surf*d/d_p(PI) ; PI = Cp*(p/Po)^kappa |
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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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IF ( Ro_surf(I,J,bi,bj).GT.0. _d 0 |
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& .AND. ksurfC(I,J,bi,bj).LE.Nr ) THEN |
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dPIdp = (atm_cp*atm_kappa/atm_po)* |
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& (Ro_surf(I,J,bi,bj)/atm_po)**(atm_kappa-1. _d 0) |
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Bo_surf(I,J,bi,bj) = dPIdp*tRef(ksurfC(I,J,bi,bj)) |
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recip_Bo(I,J,bi,bj) = 1. _d 0 / Bo_surf(I,J,bi,bj) |
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ELSE |
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Bo_surf(I,J,bi,bj) = 0. |
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recip_Bo(I,J,bi,bj) = 0. |
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ENDIF |
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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---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Update overlap regions |
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_EXCH_XY_R8(Bo_surf, myThid) |
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_EXCH_XY_R8(recip_Bo, myThid) |
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|
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IF ( buoyancyRelation .eq. 'ATMOSPHERIC' .AND. |
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& .NOT.uniformLin_PhiSurf ) THEN |
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CALL WRITE_FLD_XY_RL( 'Bo_surf',' ',Bo_surf,0,myThid) |
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ENDIF |
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|
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RETURN |
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END |
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