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C $Header: /u/gcmpack/MITgcm/model/src/find_alpha.F,v 1.10 2002/09/18 16:30:34 mlosch Exp $ |
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C $Name: $ |
| 3 |
|
| 4 |
#include "CPP_OPTIONS.h" |
| 5 |
#define USE_FACTORIZED_POLY |
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|
| 7 |
CBOP |
| 8 |
C !ROUTINE: FIND_ALPHA |
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C !INTERFACE: |
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SUBROUTINE FIND_ALPHA ( |
| 11 |
I bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
| 12 |
O alphaloc ) |
| 13 |
|
| 14 |
C !DESCRIPTION: \bv |
| 15 |
C *==========================================================* |
| 16 |
C | o SUBROUTINE FIND_ALPHA |
| 17 |
C | Calculates [drho(S,T,z) / dT] of a horizontal slice |
| 18 |
C *==========================================================* |
| 19 |
C | |
| 20 |
C | k - is the Theta/Salt level |
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C | kRef - determines pressure reference level |
| 22 |
C | (not used in 'LINEAR' mode) |
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C | |
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C | alphaloc - drho / dT (kg/m^3/C) |
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C | |
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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 Common |
| 32 |
#include "SIZE.h" |
| 33 |
#include "DYNVARS.h" |
| 34 |
#include "EEPARAMS.h" |
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#include "PARAMS.h" |
| 36 |
#include "EOS.h" |
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#include "GRID.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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c Arguments |
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integer bi,bj,iMin,iMax,jMin,jMax |
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integer k ! Level of Theta/Salt slice |
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integer kRef ! Pressure reference level |
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_RL alphaloc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 45 |
|
| 46 |
C !LOCAL VARIABLES: |
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c Local |
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integer i,j |
| 49 |
_RL refTemp,refSalt,tP,sP |
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_RL t1, t2, t3, s1, s3o2, p1, p2, sp5, p1t1 |
| 51 |
_RL drhoP0dtheta, drhoP0dthetaFresh, drhoP0dthetaSalt |
| 52 |
_RL dKdtheta, dKdthetaFresh, dKdthetaSalt, dKdthetaPres |
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_RL rhoP0(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL bulkMod(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dnum_dtheta, dden_dtheta |
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_RL rhoDen(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL rhoLoc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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integer myThid |
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CEOP |
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|
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Cml stop 'myThid is not properly defined in this subroutine' |
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|
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#ifdef CHECK_SALINITY_FOR_NEGATIVE_VALUES |
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CALL LOOK_FOR_NEG_SALINITY( bi, bj, iMin, iMax, jMin, jMax, k, |
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& sFld, myThid ) |
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#endif |
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|
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if (equationOfState.eq.'LINEAR') then |
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|
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do j=jMin,jMax |
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do i=iMin,iMax |
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alphaloc(i,j) = -rhonil * tAlpha |
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enddo |
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enddo |
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|
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elseif (equationOfState.eq.'POLY3') then |
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|
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refTemp=eosRefT(kRef) |
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refSalt=eosRefS(kRef) |
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|
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do j=jMin,jMax |
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do i=iMin,iMax |
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tP=theta(i,j,k,bi,bj)-refTemp |
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sP=salt(i,j,k,bi,bj)-refSalt |
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#ifdef USE_FACTORIZED_POLY |
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alphaloc(i,j) = |
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& ( eosC(6,kRef) |
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& *tP*3. |
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& +(eosC(7,kRef)*sP + eosC(3,kRef))*2. |
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& )*tP |
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& +(eosC(8,kRef)*sP + eosC(4,kRef) )*sP + eosC(1,kRef) |
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& |
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#else |
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alphaloc(i,j) = |
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& eosC(1,kRef) + |
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& eosC(3,kRef)*tP*2. + |
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& eosC(4,kRef) *sP + |
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& eosC(6,kRef)*tP*tP*3. + |
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& eosC(7,kRef)*tP*2. *sP + |
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& eosC(8,kRef) *sP*sP |
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#endif |
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enddo |
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enddo |
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|
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elseif ( equationOfState(1:5).eq.'JMD95' |
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& .or. equationOfState.eq.'UNESCO' ) then |
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C nonlinear equation of state in pressure coordinates |
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|
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CALL FIND_RHOP0( |
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I bi, bj, iMin, iMax, jMin, jMax, k, |
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I theta, salt, |
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O rhoP0, |
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I myThid ) |
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|
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CALL FIND_BULKMOD( |
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I bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
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I theta, salt, |
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O bulkMod, |
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I myThid ) |
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|
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do j=jMin,jMax |
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do i=iMin,iMax |
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|
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C abbreviations |
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t1 = theta(i,j,k,bi,bj) |
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t2 = t1*t1 |
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t3 = t2*t1 |
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|
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s1 = salt(i,j,k,bi,bj) |
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s3o2 = sqrt(s1*s1*s1) |
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|
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p1 = pressure(i,j,kRef,bi,bj)*SItoBar |
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p2 = p1*p1 |
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|
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C d(rho)/d(theta) |
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C of fresh water at p = 0 |
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drhoP0dthetaFresh = |
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& eosJMDCFw(2) |
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& + 2.*eosJMDCFw(3)*t1 |
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& + 3.*eosJMDCFw(4)*t2 |
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& + 4.*eosJMDCFw(5)*t3 |
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& + 5.*eosJMDCFw(6)*t3*t1 |
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C of salt water at p = 0 |
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drhoP0dthetaSalt = |
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& s1*( |
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& eosJMDCSw(2) |
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& + 2.*eosJMDCSw(3)*t1 |
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& + 3.*eosJMDCSw(4)*t2 |
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& + 4.*eosJMDCSw(5)*t3 |
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& ) |
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& + s3o2*( |
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& + eosJMDCSw(7) |
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& + 2.*eosJMDCSw(8)*t1 |
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& ) |
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C d(bulk modulus)/d(theta) |
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C of fresh water at p = 0 |
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dKdthetaFresh = |
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& eosJMDCKFw(2) |
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& + 2.*eosJMDCKFw(3)*t1 |
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& + 3.*eosJMDCKFw(4)*t2 |
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& + 4.*eosJMDCKFw(5)*t3 |
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C of sea water at p = 0 |
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dKdthetaSalt = |
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& s1*( eosJMDCKSw(2) |
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& + 2.*eosJMDCKSw(3)*t1 |
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& + 3.*eosJMDCKSw(4)*t2 |
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& ) |
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& + s3o2*( eosJMDCKSw(6) |
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& + 2.*eosJMDCKSw(7)*t1 |
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& ) |
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C of sea water at p |
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dKdthetaPres = |
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& p1*( eosJMDCKP(2) |
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& + 2.*eosJMDCKP(3)*t1 |
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& + 3.*eosJMDCKP(4)*t2 |
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& ) |
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& + p1*s1*( eosJMDCKP(6) |
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& + 2.*eosJMDCKP(7)*t1 |
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& ) |
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& + p2*( eosJMDCKP(10) |
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& + 2.*eosJMDCKP(11)*t1 |
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& ) |
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& + p2*s1*( eosJMDCKP(13) |
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& + 2.*eosJMDCKP(14)*t1 |
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& ) |
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|
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drhoP0dtheta = drhoP0dthetaFresh |
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& + drhoP0dthetaSalt |
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dKdtheta = dKdthetaFresh |
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& + dKdthetaSalt |
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& + dKdthetaPres |
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alphaloc(i,j) = |
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& ( bulkmod(i,j)**2*drhoP0dtheta |
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& - bulkmod(i,j)*p1*drhoP0dtheta |
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& - rhoP0(i,j)*p1*dKdtheta ) |
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& /( bulkmod(i,j) - p1 )**2 |
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|
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|
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end do |
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end do |
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elseif ( equationOfState.eq.'MDJWF' ) then |
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|
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CALL FIND_RHO( bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
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& theta, salt, rhoLoc, myThid ) |
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CALL FIND_RHODEN( bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
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& theta, salt, rhoDen, myThid ) |
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|
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do j=jMin,jMax |
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do i=iMin,iMax |
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t1 = theta(i,j,k,bi,bj) |
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t2 = t1*t1 |
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s1 = salt(i,j,k,bi,bj) |
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sp5 = sqrt(s1) |
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|
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p1 = pressure(i,j,kRef,bi,bj)*SItodBar |
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p1t1 = p1*t1 |
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|
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dnum_dtheta = eosMDJWFnum(1) |
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& + t1*(2.*eosMDJWFnum(2) + 3.*eosMDJWFnum(3)*t1) |
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& + eosMDJWFnum(5)*s1 |
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& + p1t1*(2.*eosMDJWFnum(8) + 2.*eosMDJWFnum(11)*p1) |
| 222 |
|
| 223 |
dden_dtheta = eosMDJWFden(1) |
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& + t1*(2.*eosMDJWFden(2) |
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& + t1*(3.*eosMDJWFden(3) |
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& + 4.*eosMDJWFden(4)*t1 ) ) |
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& + s1*(eosMDJWFden(6) |
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& + t1*(3.*eosMDJWFden(7)*t1 |
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& + 2.*eosMDJWFden(9)*sp5 ) ) |
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& + p1*p1*(3.*eosMDJWFden(11)*t2 + eosMDJWFden(12)*p1) |
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|
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alphaLoc(i,j) = rhoDen(i,j)*(dnum_dtheta |
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& - rhoLoc(i,j)*dden_dtheta) |
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|
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end do |
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end do |
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|
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else |
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write(*,*) 'FIND_ALPHA: equationOfState = ',equationOfState |
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stop 'FIND_ALPHA: "equationOfState" has illegal value' |
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endif |
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|
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return |
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end |
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|
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subroutine FIND_BETA ( |
| 247 |
I bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
| 248 |
O betaloc ) |
| 249 |
C /==========================================================\ |
| 250 |
C | o SUBROUTINE FIND_BETA | |
| 251 |
C | Calculates [drho(S,T,z) / dS] of a horizontal slice | |
| 252 |
C |==========================================================| |
| 253 |
C | | |
| 254 |
C | k - is the Theta/Salt level | |
| 255 |
C | kRef - determines pressure reference level | |
| 256 |
C | (not used in 'LINEAR' mode) | |
| 257 |
C | | |
| 258 |
C | betaloc - drho / dS (kg/m^3/PSU) | |
| 259 |
C | | |
| 260 |
C \==========================================================/ |
| 261 |
implicit none |
| 262 |
|
| 263 |
c Common |
| 264 |
#include "SIZE.h" |
| 265 |
#include "DYNVARS.h" |
| 266 |
#include "EEPARAMS.h" |
| 267 |
#include "PARAMS.h" |
| 268 |
#include "EOS.h" |
| 269 |
#include "GRID.h" |
| 270 |
|
| 271 |
c Arguments |
| 272 |
integer bi,bj,iMin,iMax,jMin,jMax |
| 273 |
integer k ! Level of Theta/Salt slice |
| 274 |
integer kRef ! Pressure reference level |
| 275 |
_RL betaloc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 276 |
|
| 277 |
c Local |
| 278 |
integer i,j |
| 279 |
_RL refTemp,refSalt,tP,sP |
| 280 |
_RL t1, t2, t3, s1, s3o2, p1, sp5, p1t1 |
| 281 |
_RL drhoP0dS |
| 282 |
_RL dKdS, dKdSSalt, dKdSPres |
| 283 |
_RL rhoP0(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 284 |
_RL bulkMod(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 285 |
_RL dnum_dsalt, dden_dsalt |
| 286 |
_RL rhoDen(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 287 |
_RL rhoLoc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 288 |
integer myThid |
| 289 |
CEOP |
| 290 |
|
| 291 |
Cml stop 'myThid is not properly defined in this subroutine' |
| 292 |
|
| 293 |
#ifdef CHECK_SALINITY_FOR_NEGATIVE_VALUES |
| 294 |
CALL LOOK_FOR_NEG_SALINITY( bi, bj, iMin, iMax, jMin, jMax, k, |
| 295 |
& sFld, myThid ) |
| 296 |
#endif |
| 297 |
|
| 298 |
if (equationOfState.eq.'LINEAR') then |
| 299 |
|
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do j=jMin,jMax |
| 301 |
do i=iMin,iMax |
| 302 |
betaloc(i,j) = rhonil * sBeta |
| 303 |
enddo |
| 304 |
enddo |
| 305 |
|
| 306 |
elseif (equationOfState.eq.'POLY3') then |
| 307 |
|
| 308 |
refTemp=eosRefT(kRef) |
| 309 |
refSalt=eosRefS(kRef) |
| 310 |
|
| 311 |
do j=jMin,jMax |
| 312 |
do i=iMin,iMax |
| 313 |
tP=theta(i,j,k,bi,bj)-refTemp |
| 314 |
sP=salt(i,j,k,bi,bj)-refSalt |
| 315 |
#ifdef USE_FACTORIZED_POLY |
| 316 |
betaloc(i,j) = |
| 317 |
& ( eosC(9,kRef)*sP*3. + eosC(5,kRef)*2. )*sP + eosC(2,kRef) |
| 318 |
& + ( eosC(7,kRef)*tP |
| 319 |
& +eosC(8,kRef)*sP*2. + eosC(4,kRef) |
| 320 |
& )*tP |
| 321 |
#else |
| 322 |
betaloc(i,j) = |
| 323 |
& eosC(2,kRef) + |
| 324 |
& eosC(4,kRef)*tP + |
| 325 |
& eosC(5,kRef) *sP*2. + |
| 326 |
& eosC(7,kRef)*tP*tP + |
| 327 |
& eosC(8,kRef)*tP *sP*2. + |
| 328 |
& eosC(9,kRef) *sP*sP*3. |
| 329 |
#endif |
| 330 |
enddo |
| 331 |
enddo |
| 332 |
|
| 333 |
elseif ( equationOfState(1:5).eq.'JMD95' |
| 334 |
& .or. equationOfState.eq.'UNESCO' ) then |
| 335 |
C nonlinear equation of state in pressure coordinates |
| 336 |
|
| 337 |
CALL FIND_RHOP0( |
| 338 |
I bi, bj, iMin, iMax, jMin, jMax, k, |
| 339 |
I theta, salt, |
| 340 |
O rhoP0, |
| 341 |
I myThid ) |
| 342 |
|
| 343 |
CALL FIND_BULKMOD( |
| 344 |
I bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
| 345 |
I theta, salt, |
| 346 |
O bulkMod, |
| 347 |
I myThid ) |
| 348 |
|
| 349 |
do j=jMin,jMax |
| 350 |
do i=iMin,iMax |
| 351 |
|
| 352 |
C abbreviations |
| 353 |
t1 = theta(i,j,k,bi,bj) |
| 354 |
t2 = t1*t1 |
| 355 |
t3 = t2*t1 |
| 356 |
|
| 357 |
s1 = salt(i,j,k,bi,bj) |
| 358 |
s3o2 = 1.5*sqrt(s1) |
| 359 |
|
| 360 |
p1 = pressure(i,j,kRef,bi,bj)*SItoBar |
| 361 |
|
| 362 |
C d(rho)/d(S) |
| 363 |
C of fresh water at p = 0 |
| 364 |
drhoP0dS = 0. _d 0 |
| 365 |
C of salt water at p = 0 |
| 366 |
drhoP0dS = drhoP0dS |
| 367 |
& + eosJMDCSw(1) |
| 368 |
& + eosJMDCSw(2)*t1 |
| 369 |
& + eosJMDCSw(3)*t2 |
| 370 |
& + eosJMDCSw(4)*t3 |
| 371 |
& + eosJMDCSw(5)*t3*t1 |
| 372 |
& + s3o2*( |
| 373 |
& eosJMDCSw(6) |
| 374 |
& + eosJMDCSw(7)*t1 |
| 375 |
& + eosJMDCSw(8)*t2 |
| 376 |
& ) |
| 377 |
& + 2*eosJMDCSw(9)*s1 |
| 378 |
C d(bulk modulus)/d(S) |
| 379 |
C of fresh water at p = 0 |
| 380 |
dKdS = 0. _d 0 |
| 381 |
C of sea water at p = 0 |
| 382 |
dKdSSalt = |
| 383 |
& eosJMDCKSw(1) |
| 384 |
& + eosJMDCKSw(2)*t1 |
| 385 |
& + eosJMDCKSw(3)*t2 |
| 386 |
& + eosJMDCKSw(4)*t3 |
| 387 |
& + s3o2*( eosJMDCKSw(5) |
| 388 |
& + eosJMDCKSw(6)*t1 |
| 389 |
& + eosJMDCKSw(7)*t2 |
| 390 |
& ) |
| 391 |
|
| 392 |
C of sea water at p |
| 393 |
dKdSPres = |
| 394 |
& p1*( eosJMDCKP(5) |
| 395 |
& + eosJMDCKP(6)*t1 |
| 396 |
& + eosJMDCKP(7)*t2 |
| 397 |
& ) |
| 398 |
& + s3o2*p1*eosJMDCKP(8) |
| 399 |
& + p1*p1*( eosJMDCKP(12) |
| 400 |
& + eosJMDCKP(13)*t1 |
| 401 |
& + eosJMDCKP(14)*t2 |
| 402 |
& ) |
| 403 |
|
| 404 |
dKdS = dKdSSalt + dKdSPres |
| 405 |
|
| 406 |
betaloc(i,j) = |
| 407 |
& ( bulkmod(i,j)**2*drhoP0dS |
| 408 |
& - bulkmod(i,j)*p1*drhoP0dS |
| 409 |
& - rhoP0(i,j)*p1*dKdS ) |
| 410 |
& /( bulkmod(i,j) - p1 )**2 |
| 411 |
|
| 412 |
|
| 413 |
end do |
| 414 |
end do |
| 415 |
elseif ( equationOfState.eq.'MDJWF' ) then |
| 416 |
|
| 417 |
CALL FIND_RHO( bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
| 418 |
& theta, salt, rhoLoc, myThid ) |
| 419 |
CALL FIND_RHODEN( bi, bj, iMin, iMax, jMin, jMax, k, kRef, |
| 420 |
& theta, salt, rhoDen, myThid ) |
| 421 |
|
| 422 |
do j=jMin,jMax |
| 423 |
do i=iMin,iMax |
| 424 |
t1 = theta(i,j,k,bi,bj) |
| 425 |
t2 = t1*t1 |
| 426 |
s1 = salt(i,j,k,bi,bj) |
| 427 |
sp5 = sqrt(s1) |
| 428 |
|
| 429 |
p1 = pressure(i,j,k,bi,bj)*SItodBar |
| 430 |
p1t1 = p1*t1 |
| 431 |
|
| 432 |
dnum_dsalt = eosMDJWFnum(4) |
| 433 |
& + eosMDJWFnum(5)*t1 |
| 434 |
& + 2.*eosMDJWFnum(6)*s1 + eosMDJWFnum(9)*p1 |
| 435 |
dden_dsalt = eosMDJWFden(5) |
| 436 |
& + t1*( eosMDJWFden(6) + eosMDJWFden(7)*t2 ) |
| 437 |
& + 1.5*sp5*(eosMDJWFden(8) + eosMDJWFden(9)*t2) |
| 438 |
|
| 439 |
betaLoc(i,j) = rhoDen(i,j)*( dnum_dsalt |
| 440 |
& - rhoLoc(i,j)*dden_dsalt ) |
| 441 |
|
| 442 |
end do |
| 443 |
end do |
| 444 |
|
| 445 |
else |
| 446 |
write(*,*) 'FIND_BETA: equationOfState = ',equationOfState |
| 447 |
stop 'FIND_BETA: "equationOfState" has illegal value' |
| 448 |
endif |
| 449 |
|
| 450 |
return |
| 451 |
end |
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