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C $Header: /u/gcmpack/MITgcm/model/src/ini_linear_phisurf.F,v 1.21 2012/07/13 22:07:09 jmc Exp $ |
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C $Name: $ |
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|
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: INI_LINEAR_PHISURF |
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C !INTERFACE: |
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SUBROUTINE INI_LINEAR_PHISURF( myThid ) |
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|
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C !DESCRIPTION: \bv |
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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 | Initialise -Buoyancy 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 | Initialise phi0surf = starting point for integrating |
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C | phiHyd (= phiHyd at r=RoSurf) |
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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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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 !INPUT/OUTPUT PARAMETERS: |
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C === Routine arguments === |
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C myThid :: my Thread Id number |
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INTEGER myThid |
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|
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C == Local variables in common == |
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C topoHloc had to be in common for multi threading but no longer |
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C needed since MDSIO now allows (2009/06/07) to write local arrays |
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|
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C !LOCAL VARIABLES: |
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C === Local variables === |
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C topoHloc :: Temporary array used to write surface topography |
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C bi,bj :: tile indices |
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C i,j,k :: Loop counters |
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_RS topoHloc(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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INTEGER bi, bj |
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INTEGER i, j, k |
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_RL pLoc, rhoLoc |
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_RL dPIdp |
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CEOP |
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|
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C-- Initialisation |
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#ifdef ALLOW_AUTODIFF |
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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) = 0. _d 0 |
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recip_Bo(i,j,bi,bj) = 0. _d 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 /* ALLOW_AUTODIFF */ |
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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 -Buoyancy at surface level : Bo_surf |
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C Bo_surf is defined as d/dr(Phi_surf) and set to g/z2rUnit with |
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C z2rUnit = conversion factor from z-unit to r-unit: [z] * z2rUnit = [r] |
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C an accurate formulation includes P_surf and T,S_ref effects on rho_surf: |
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C (setting uniformLin_PhiSurf=.FALSE.): |
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C z-coord (z2rUnit=1): Bo_surf = - Buoyancy |
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C = g * rho_surf(Tref,Sref,pSurf_0)/rho_0 |
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C p-coord (z2rUnit=rho*g): Bo_surf = 1/rho(Tref(ksurf),pSurf_0) |
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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 ( usingZCoords ) 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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c Bo_surf(I,J,bi,bj) = rVel2wUnit(1)*gravity |
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c recip_Bo(I,J,bi,bj) = wUnit2rVel(1)*recip_gravity |
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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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ELSEIF ( fluidIsWater ) 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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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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k = kSurfC(I,J,bi,bj) |
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pLoc = Ro_surf(I,J,bi,bj) |
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CALL FIND_RHO_SCALAR( |
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I tRef(k), sRef(k), pLoc, |
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O rhoLoc, myThid ) |
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IF ( rhoLoc .EQ. 0. _d 0 ) THEN |
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Bo_surf(I,J,bi,bj) = 0. _d 0 |
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ELSE |
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Bo_surf(I,J,bi,bj) = 1. _d 0/rhoLoc |
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ENDIF |
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recip_Bo(I,J,bi,bj) = rhoLoc |
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ELSE |
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Bo_surf(I,J,bi,bj) = 0. _d 0 |
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recip_Bo(I,J,bi,bj) = 0. _d 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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ELSEIF ( fluidIsAir ) THEN |
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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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ELSE |
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STOP 'INI_LINEAR_PHISURF: We should never reach this point!' |
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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 (jmc: is it really needed ?) |
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_EXCH_XY_RL(Bo_surf, myThid) |
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_EXCH_XY_RL(recip_Bo, myThid) |
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|
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IF ( usingPCoords .AND. .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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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Initialise phi0surf: used for atmos. surf. P-loading (ocean, z-coord) |
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C or topographic geopotential anom. (p-coord) |
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|
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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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phi0surf(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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|
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IF ( fluidIsAir .AND. topoFile.NE.' ' ) THEN |
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|
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#ifdef ALLOW_AUTODIFF |
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STOP 'CANNOT PRESENTLY USE THIS OPTION WITH ADJOINT' |
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#else |
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|
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C-- Compute topoH = PhiRef(Po_surf)/g ; is different from original |
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C topoZ(read from file) because of truncation of Po_surf. |
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C NOTE: not clear for now which topoZ needs to be saved in common block |
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C-- AND set phi0surf = starting point for integrating Geopotential; |
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|
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CALL INI_P_GROUND( -2, |
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O topoHloc, |
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I Ro_surf, myThid ) |
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|
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|
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IF (selectFindRoSurf.NE.0) THEN |
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_EXCH_XY_RS(phi0surf, myThid) |
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CALL WRITE_FLD_XY_RS( 'phi0surf',' ',phi0surf,0,myThid) |
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ENDIF |
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|
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CALL WRITE_FLD_XY_RS( 'topo_H',' ',topoHloc,0,myThid) |
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|
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#endif /* ALLOW_AUTODIFF */ |
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|
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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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RETURN |
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END |
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