| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/dic/o2_surfforcing.F,v 1.12 2007/05/01 21:45:33 stephd Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "DIC_OPTIONS.h" |
| 5 |
#include "GCHEM_OPTIONS.h" |
| 6 |
|
| 7 |
CBOP |
| 8 |
C !ROUTINE: O2_SURFFORCING |
| 9 |
|
| 10 |
C !INTERFACE: ========================================================== |
| 11 |
SUBROUTINE O2_SURFFORCING( PTR_O2, SGO2, |
| 12 |
I bi,bj,iMin,iMax,jMin,jMax, |
| 13 |
I myIter, myTime, myThid ) |
| 14 |
|
| 15 |
C !DESCRIPTION: |
| 16 |
C Calculate the oxygen air-sea flux terms |
| 17 |
|
| 18 |
C !USES: =============================================================== |
| 19 |
IMPLICIT NONE |
| 20 |
#include "SIZE.h" |
| 21 |
#include "DYNVARS.h" |
| 22 |
#include "EEPARAMS.h" |
| 23 |
#include "PARAMS.h" |
| 24 |
#include "GRID.h" |
| 25 |
#include "FFIELDS.h" |
| 26 |
#ifdef DIC_BIOTIC |
| 27 |
#include "DIC_ABIOTIC.h" |
| 28 |
#endif |
| 29 |
|
| 30 |
|
| 31 |
c !INPUT PARAMETERS: =================================================== |
| 32 |
C myThid :: thread number |
| 33 |
C myIter :: current timestep |
| 34 |
C myTime :: current time |
| 35 |
C PTR_O2 :: oxygen tracer field |
| 36 |
_RL myTime |
| 37 |
_RL PTR_O2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
| 38 |
INTEGER iMin,iMax,jMin,jMax, bi, bj |
| 39 |
INTEGER myIter, myThid |
| 40 |
|
| 41 |
c !OUTPUT PARAMETERS: =================================================== |
| 42 |
C SGO2 :: air-sea exchange of oxygen |
| 43 |
_RL SGO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 44 |
|
| 45 |
#ifdef ALLOW_PTRACERS |
| 46 |
|
| 47 |
#ifdef ALLOW_O2 |
| 48 |
|
| 49 |
C !LOCAL VARIABLES: =================================================== |
| 50 |
C I, J, K - Loop counters |
| 51 |
INTEGER I,J,K |
| 52 |
C Solubility relation coefficients |
| 53 |
_RL SchmidtNoO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 54 |
_RL O2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 55 |
_RL Kwexch(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 56 |
_RL FluxO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 57 |
_RL AtmosO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 58 |
_RL aTT |
| 59 |
_RL aTK |
| 60 |
_RL aTS |
| 61 |
_RL aTS2 |
| 62 |
_RL aTS3 |
| 63 |
_RL aTS4 |
| 64 |
_RL aTS5 |
| 65 |
_RL o2s |
| 66 |
_RL ttemp |
| 67 |
_RL stemp |
| 68 |
_RL oCnew |
| 69 |
CEOP |
| 70 |
|
| 71 |
|
| 72 |
K=1 |
| 73 |
|
| 74 |
C calculate SCHMIDT NO. for O2 |
| 75 |
DO j=jmin,jmax |
| 76 |
DO i=imin,imax |
| 77 |
IF (hFacC(i,j,k,bi,bj).NE.0.) THEN |
| 78 |
SchmidtNoO2(i,j) = |
| 79 |
& sox1 |
| 80 |
& + sox2 * theta(i,j,k,bi,bj) |
| 81 |
& + sox3 * theta(i,j,k,bi,bj)*theta(i,j,k,bi,bj) |
| 82 |
& + sox4 * theta(i,j,k,bi,bj)*theta(i,j,k,bi,bj) |
| 83 |
& *theta(i,j,k,bi,bj) |
| 84 |
|
| 85 |
C Determine surface flux of O2 |
| 86 |
C exchange coeff, accounting for ice cover and Schmidt no. |
| 87 |
pisvel(i,j,bi,bj) =0.337*wind(i,j,bi,bj)**2/3.6d5 |
| 88 |
Kwexch(i,j) = |
| 89 |
& pisvel(i,j,bi,bj) |
| 90 |
& / sqrt(SchmidtNoO2(i,j)/660.0) |
| 91 |
c ice influence |
| 92 |
Kwexch(i,j) =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j) |
| 93 |
|
| 94 |
ttemp = theta(i,j,k,bi,bj) |
| 95 |
stemp = salt(i,j,k,bi,bj) |
| 96 |
C determine saturation O2 |
| 97 |
C using Garcia and Gordon (1992), L&O (mistake in original???) |
| 98 |
aTT = 298.15-ttemp |
| 99 |
aTK = 273.15+ttemp |
| 100 |
aTS = log(aTT/aTK) |
| 101 |
aTS2 = aTS*aTS |
| 102 |
aTS3 = aTS2*aTS |
| 103 |
aTS4 = aTS3*aTS |
| 104 |
aTS5 = aTS4*aTS |
| 105 |
|
| 106 |
oCnew = oA0 + oA1*aTS + oA2*aTS2 + oA3*aTS3 + |
| 107 |
& oA4*aTS4 + oA5*aTS5 |
| 108 |
& + stemp*(oB0 + oB1*aTS + oB2*aTS2 + oB3*aTS3) |
| 109 |
& + oC0*(stemp*stemp) |
| 110 |
|
| 111 |
o2s = EXP(oCnew) |
| 112 |
|
| 113 |
c Convert from ml/l to mol/m^3 |
| 114 |
O2sat(i,j) = o2s/22391.6*1000.0 |
| 115 |
|
| 116 |
#ifdef USE_PLOAD |
| 117 |
c convert from Pa to atmos |
| 118 |
AtmosP(i,j,bi,bj)=pLoad(i,j,bi,bj)/1.01295e5 |
| 119 |
#endif |
| 120 |
|
| 121 |
c Determine flux, inc. correction for local atmos surface pressure |
| 122 |
cQQ PTR_O2? |
| 123 |
FluxO2(i,j) = maskC(i,j,k,bi,bj)*Kwexch(i,j)* |
| 124 |
& (AtmosP(i,j,bi,bj)*O2sat(i,j) |
| 125 |
& - PTR_O2(i,j,1)) |
| 126 |
ELSE |
| 127 |
FluxO2(i,j) = 0.d0 |
| 128 |
ENDIF |
| 129 |
|
| 130 |
|
| 131 |
END DO |
| 132 |
END DO |
| 133 |
|
| 134 |
C update surface tendencies |
| 135 |
DO j=jmin,jmax |
| 136 |
DO i=imin,imax |
| 137 |
SGO2(i,j)= maskC(i,j,1,bi,bj)*FluxO2(i,j) |
| 138 |
& *recip_drF(1) * recip_hFacC(i,j,1,bi,bj) |
| 139 |
ENDDO |
| 140 |
ENDDO |
| 141 |
#endif |
| 142 |
#endif |
| 143 |
|
| 144 |
|
| 145 |
RETURN |
| 146 |
END |
| 147 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph