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C $Header: /u/gcmpack/models/MITgcmUV/model/src/find_alpha.F,v 1.4 2001/04/10 22:35:25 heimbach Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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#define USE_FACTORIZED_POLY |
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|
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CBOP |
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C !ROUTINE: FIND_ALPHA |
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C !INTERFACE: |
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SUBROUTINE FIND_ALPHA ( |
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I bi, bj, iMin, iMax, jMin, jMax, k, kRef, eqn, |
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O alphaloc ) |
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|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | o SUBROUTINE FIND_ALPHA |
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C | Calculates [drho(S,T,z) / dT] of a horizontal slice |
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C *==========================================================* |
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C | |
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C | k - is the Theta/Salt level |
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C | kRef - determines pressure reference level |
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C | (not used in 'LINEAR' mode) |
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C | eqn - determines the eqn. of state: 'LINEAR' or 'POLY3' |
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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 |
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#include "SIZE.h" |
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#include "DYNVARS.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.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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character*(*) eqn |
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_RL alphaloc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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|
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C !LOCAL VARIABLES: |
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c Local |
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integer i,j |
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_RL refTemp,refSalt,tP,sP |
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CEOP |
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|
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if (eqn.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 (eqn.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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else |
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write(*,*) 'FIND_ALPHA: eqn = ',eqn |
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stop 'FIND_ALPHA: argument "eqn" 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 ( |
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I bi, bj, iMin, iMax, jMin, jMax, k, kRef, eqn, |
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O betaloc ) |
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C /==========================================================\ |
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C | o SUBROUTINE FIND_BETA | |
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C | Calculates [drho(S,T,z) / dS] of a horizontal slice | |
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C |==========================================================| |
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C | | |
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C | k - is the Theta/Salt level | |
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C | kRef - determines pressure reference level | |
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C | (not used in 'LINEAR' mode) | |
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C | eqn - determines the eqn. of state: 'LINEAR' or 'POLY3' | |
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C | | |
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C | betaloc - drho / dS (kg/m^3/PSU) | |
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C | | |
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C \==========================================================/ |
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implicit none |
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|
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c Common |
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#include "SIZE.h" |
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#include "DYNVARS.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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|
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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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character*(*) eqn |
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_RL betaloc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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|
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c Local |
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integer i,j |
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_RL refTemp,refSalt,tP,sP |
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|
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if (eqn.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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betaloc(i,j) = rhonil * sBeta |
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enddo |
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enddo |
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|
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elseif (eqn.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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betaloc(i,j) = |
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& ( eosC(9,kRef)*sP*3. + eosC(5,kRef)*2. )*sP + eosC(2,kRef) |
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& + ( eosC(7,kRef)*tP |
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& +eosC(8,kRef)*sP*2. + eosC(4,kRef) |
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& )*tP |
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#else |
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betaloc(i,j) = |
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& eosC(2,kRef) + |
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& eosC(4,kRef)*tP + |
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& eosC(5,kRef) *sP*2. + |
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& eosC(7,kRef)*tP*tP + |
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& eosC(8,kRef)*tP *sP*2. + |
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& eosC(9,kRef) *sP*sP*3. |
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#endif |
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enddo |
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enddo |
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|
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else |
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write(*,*) 'FIND_BETA: eqn = ',eqn |
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stop 'FIND_BETA: argument "eqn" 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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