C $Header: /u/gcmpack/MITgcm/pkg/dic/dic_surfforcing_init.F,v 1.29 2010/04/12 20:07:57 jmc Exp $
C $Name: $
#include "DIC_OPTIONS.h"
#include "PTRACERS_OPTIONS.h"
CBOP
C !ROUTINE: DIC_SURFFORCING_INIT
C !INTERFACE: ==========================================================
SUBROUTINE DIC_SURFFORCING_INIT(
I myThid)
C !DESCRIPTION:
C Calculate first guess of pH
C !USES: ===============================================================
IMPLICIT NONE
#include "SIZE.h"
#include "DYNVARS.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "FFIELDS.h"
#include "DIC_VARS.h"
#include "PTRACERS_SIZE.h"
#include "PTRACERS_PARAMS.h"
#include "PTRACERS_FIELDS.h"
#include "DIC_LOAD.h"
C !INPUT PARAMETERS: ===================================================
C myThid :: thread number
INTEGER myThid
#ifdef ALLOW_DIC
C !LOCAL VARIABLES: ====================================================
INTEGER i,j, kLev, it
INTEGER intime0,intime1
_RL aWght,bWght,rdt
INTEGER nForcingPeriods,Imytm,Ifprd,Ifcyc,Iftm
C Number of iterations for pCO2 solvers...
C Solubility relation coefficients
C local variables for carbon chem
_RL PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
INTEGER iMin,iMax,jMin,jMax, bi, bj
_RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
_RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
_RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
INTEGER iprt,jprt
LOGICAL pH_isLoaded
CEOP
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
kLev=1
CALL DIC_ATMOS(0, startTime, nIter0, myThid )
ccccccccccccccccccccccccccccccccccccccccc
IF ( periodicExternalForcing ) THEN
c read in silica field
CALL LEF_ZERO( silica0,myThid )
CALL LEF_ZERO( silica1,myThid )
rdt = 1. _d 0 / deltaTclock
nForcingPeriods = NINT(externForcingCycle/externForcingPeriod)
cswd QQ change for placement of chem forcing (ie. after timestep)
Imytm = NINT(startTime*rdt)
Ifprd = NINT(externForcingPeriod*rdt)
Ifcyc = NINT(externForcingCycle*rdt)
Iftm = MOD( Imytm+Ifcyc-Ifprd/2, Ifcyc)
intime0 = 1 + INT(Iftm/Ifprd)
intime1 = 1 + MOD(intime0,nForcingPeriods)
c aWght = DFLOAT( Iftm-Ifprd*(intime0 - 1) ) / DFLOAT( Ifprd )
aWght = FLOAT( Iftm-Ifprd*(intime0 - 1) )
bWght = FLOAT( Ifprd )
aWght = aWght / bWght
bWght = 1. _d 0 - aWght
_BARRIER
_BEGIN_MASTER(myThid)
WRITE(*,*)
& 'S/R DIC_SURFFORCING_INIT: Reading new dic data',
& intime0, intime1
_END_MASTER(myThid)
IF ( DIC_silicaFile .NE. ' ' ) THEN
CALL READ_REC_XY_RS( DIC_silicaFile,silica0,intime0,
& nIter0,myThid )
CALL READ_REC_XY_RS( DIC_silicaFile,silica1,intime1,
& nIter0,myThid )
ENDIF
#ifdef ALLOW_OFFLINE
IF ( useOffLine ) THEN
CALL OFFLINE_FIELDS_LOAD( startTime, nIter0, myThid )
ENDIF
#endif
_EXCH_XY_RS(silica0, myThid )
_EXCH_XY_RS(silica1, myThid )
IF ( DIC_silicaFile .NE. ' ' ) THEN
DO bj = myByLo(myThid), myByHi(myThid)
DO bi = myBxLo(myThid), myBxHi(myThid)
DO j=1-Oly,sNy+Oly
DO i=1-Olx,sNx+Olx
SILICA(i,j,bi,bj)= bWght*silica0(i,j,bi,bj)
& + aWght*silica1(i,j,bi,bj)
ENDDO
ENDDO
ENDDO
ENDDO
ENDIF
c end periodicExternalForcing
ENDIF
C =================================================================
jMin=1
jMax=sNy
iMin=1
iMax=sNx
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
DO j=1-OLy,sNy+OLy
DO i=1-Olx,sNx+OLx
pH(i,j,bi,bj) = 8. _d 0
ENDDO
ENDDO
ENDDO
ENDDO
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
DO j=1-OLy,sNy+OLy
DO i=1-OLx,sNx+OLx
ak0(i,j,bi,bj)=0. _d 0
ak1(i,j,bi,bj)=0. _d 0
ak2(i,j,bi,bj)=0. _d 0
akw(i,j,bi,bj)=0. _d 0
akb(i,j,bi,bj)=0. _d 0
akf(i,j,bi,bj)=0. _d 0
ak1p(i,j,bi,bj)=0. _d 0
ak2p(i,j,bi,bj)=0. _d 0
ak3p(i,j,bi,bj)=0. _d 0
aksi(i,j,bi,bj)=0. _d 0
ff(i,j,bi,bj)=0. _d 0
ft(i,j,bi,bj)=0. _d 0
st(i,j,bi,bj)=0. _d 0
bt(i,j,bi,bj)=0. _d 0
ENDDO
ENDDO
ENDDO
ENDDO
pH_isLoaded = .FALSE.
IF ( nIter0.GT.PTRACERS_Iter0 .OR.
& (nIter0.EQ.PTRACERS_Iter0 .AND. pickupSuff.NE.' ')
& ) THEN
C Read pH from a pickup file if needed
CALL DIC_READ_PICKUP(
O pH_isLoaded,
I nIter0, myThid )
ENDIF
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
C determine inorganic carbon chem coefficients
DO j=jMin,jMax
DO i=iMin,iMax
#ifdef DIC_BIOTIC
surfalk(i,j) = PTRACER(i,j,klev,bi,bj,2)
& * maskC(i,j,kLev,bi,bj)
surfphos(i,j)= PTRACER(i,j,klev,bi,bj,3)
& * maskC(i,j,kLev,bi,bj)
#else
surfalk(i,j) = 2.366595 _d 0 *salt(i,j,kLev,bi,bj)/35. _d 0
& * maskC(i,j,kLev,bi,bj)
surfphos(i,j)= 5.1225 _d -4 * maskC(i,j,kLev,bi,bj)
#endif
C FOR NON-INTERACTIVE Si
surfsi(i,j) = Silica(i,j,bi,bj) * maskC(i,j,kLev,bi,bj)
PTR_CO2(i,j,kLev) = PTRACER(i,j,klev,bi,bj,1)
& * maskC(i,j,kLev,bi,bj)
ENDDO
ENDDO
CALL CARBON_COEFFS(
I theta,salt,
I bi,bj,iMin,iMax,jMin,jMax,myThid)
C====================================================================
IF ( .NOT.pH_isLoaded ) THEN
C set guess of pH for first step here
WRITE(standardMessageUnit,*) 'QQ: pCO2 approximation method'
c first approximation
C$TAF LOOP = parallel
DO j=jMin,jMax
C$TAF LOOP = parallel
DO i=iMin,iMax
IF ( maskC(i,j,kLev,bi,bj) .NE. 0. _d 0) THEN
C$TAF init dic_surf = static, 10
DO it=1,10
C$TAF STORE pH(i,j,bi,bj), PTR_CO2(i,j,kLev) = dic_surf
C$TAF STORE surfalk(i,j), surfphos(i,j), surfsi(i,j) = dic_surf
CALL CALC_PCO2_APPROX(
I theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj),
I PTR_CO2(i,j,kLev), surfphos(i,j),
I surfsi(i,j),surfalk(i,j),
I ak1(i,j,bi,bj),ak2(i,j,bi,bj),
I ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),
I aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),
I aksi(i,j,bi,bj),akf(i,j,bi,bj),ff(i,j,bi,bj),
I bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),
U pH(i,j,bi,bj),pCO2(i,j,bi,bj),
I i,j,kLev,bi,bj, it , myThid )
ENDDO
ENDIF
ENDDO
ENDDO
iprt = MIN(20,sNx)
jprt = MIN(20,sNy)
WRITE(standardMessageUnit,*) 'QQ first guess pH',
& pH(iprt,jprt,bi,bj),
& theta(iprt,jprt,1,bi,bj), salt(iprt,jprt,1,bi,bj),
& PTR_CO2(iprt,jprt,1), surfphos(iprt,jprt),
& surfsi(iprt,jprt),surfalk(iprt,jprt)
ENDIF
C end bi,bj loops
ENDDO
ENDDO
#endif /* ALLOW_DIC */
RETURN
END