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o2sat.F
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o2sat.F
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*
* o2sat.F
*
* Andreas Schmittner ([email protected])
* Jul 24, 2017
*
* Returns oxygen saturation concentration of sea water
*
SUBROUTINE o2sat_init(id)
INCLUDE 'ferret_cmn/EF_Util.cmn'
INTEGER id, arg
CALL ef_version_test(ef_version)
* **********************************************************************
* USER CONFIGURABLE PORTION |
* |
* V
CALL ef_set_desc(id,
. 'returns oxygen saturation (mol/m^3) using OCMIP routines' )
CALL ef_set_num_args(id, 2)
CALL ef_set_axis_inheritance_6d(id,
. IMPLIED_BY_ARGS, IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS, IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS, IMPLIED_BY_ARGS)
CALL ef_set_piecemeal_ok_6d(id, YES, YES, YES, YES, YES, YES)
arg = 1
CALL ef_set_arg_name(id, arg, 'TEMP')
CALL ef_set_arg_unit(id, arg, 'deg C')
CALL ef_set_arg_desc(id, arg, 'temperature')
CALL ef_set_axis_influence_6d(id, arg,
. YES, YES, YES, YES, YES, YES)
arg = 2
CALL ef_set_arg_name(id, arg, 'SALT')
CALL ef_set_arg_unit(id, arg, 'su')
CALL ef_set_arg_desc(id, arg, 'salinity')
CALL ef_set_axis_influence_6d(id, arg,
. YES, YES, YES, YES, YES, YES)
* ^
* |
* USER CONFIGURABLE PORTION |
* **********************************************************************
RETURN
END
*
* In this subroutine we compute the result
*
SUBROUTINE o2sat_compute(id, arg_1, arg_2, result)
IMPLICIT NONE
INCLUDE 'ferret_cmn/EF_Util.cmn'
INCLUDE 'ferret_cmn/EF_mem_subsc.cmn'
INTEGER id
REAL arg_1(mem1lox:mem1hix, mem1loy:mem1hiy, mem1loz:mem1hiz,
. mem1lot:mem1hit, mem1loe:mem1hie, mem1lof:mem1hif)
REAL arg_2(mem2lox:mem2hix, mem2loy:mem2hiy, mem2loz:mem2hiz,
. mem2lot:mem2hit, mem2loe:mem2hie, mem2lof:mem2hif)
REAL result(memreslox:memreshix, memresloy:memreshiy,
. memresloz:memreshiz, memreslot:memreshit,
. memresloe:memreshie, memreslof:memreshif)
* After initialization, the 'res_' arrays contain indexing information
* for the result axes. The 'arg_' arrays will contain the indexing
* information for each variable's axes.
INTEGER res_lo_ss(6),
. res_hi_ss(6),
. res_incr (6)
INTEGER arg_lo_ss(6,EF_MAX_ARGS),
. arg_hi_ss(6,EF_MAX_ARGS),
. arg_incr (6,EF_MAX_ARGS)
REAL bad_flag(EF_MAX_ARGS), bad_flag_result
* **********************************************************************
* USER CONFIGURABLE PORTION |
* |
* V
INTEGER i, j, k, l, m, n
INTEGER i1, j1, k1, l1, m1, n1
INTEGER i2, j2, k2, l2, m2, n2
real o2sato
CALL ef_get_res_subscripts_6d(id, res_lo_ss, res_hi_ss, res_incr)
CALL ef_get_arg_subscripts_6d(id, arg_lo_ss, arg_hi_ss, arg_incr)
CALL ef_get_bad_flags(id, bad_flag, bad_flag_result)
n1 = arg_lo_ss(F_AXIS,ARG1)
n2 = arg_lo_ss(F_AXIS,ARG2)
DO 600 n = res_lo_ss(F_AXIS), res_hi_ss(F_AXIS)
m1 = arg_lo_ss(E_AXIS,ARG1)
m2 = arg_lo_ss(E_AXIS,ARG2)
DO 500 m = res_lo_ss(E_AXIS), res_hi_ss(E_AXIS)
l1 = arg_lo_ss(T_AXIS,ARG1)
l2 = arg_lo_ss(T_AXIS,ARG2)
DO 400 l = res_lo_ss(T_AXIS), res_hi_ss(T_AXIS)
k1 = arg_lo_ss(Z_AXIS,ARG1)
k2 = arg_lo_ss(Z_AXIS,ARG2)
DO 300 k = res_lo_ss(Z_AXIS), res_hi_ss(Z_AXIS)
j1 = arg_lo_ss(Y_AXIS,ARG1)
j2 = arg_lo_ss(Y_AXIS,ARG2)
DO 200 j = res_lo_ss(Y_AXIS), res_hi_ss(Y_AXIS)
i1 = arg_lo_ss(X_AXIS,ARG1)
i2 = arg_lo_ss(X_AXIS,ARG2)
DO 100 i = res_lo_ss(X_AXIS), res_hi_ss(X_AXIS)
IF ( (arg_1(i1,j1,k1,l1,m1,n1) .EQ. bad_flag(ARG1)) .OR.
. (arg_2(i2,j2,k2,l2,m2,n2) .EQ. bad_flag(ARG2)) ) THEN
result(i,j,k,l,m,n) = bad_flag_result
ELSE
result(i,j,k,l,m,n) = o2sato(arg_1(i1,j1,k1,l1,m1,n1)
& ,arg_2(i2,j2,k2,l2,m2,n2))
ENDIF
i1 = i1 + arg_incr(X_AXIS,ARG1)
i2 = i2 + arg_incr(X_AXIS,ARG2)
100 CONTINUE
j1 = j1 + arg_incr(Y_AXIS,ARG1)
j2 = j2 + arg_incr(Y_AXIS,ARG2)
200 CONTINUE
k1 = k1 + arg_incr(Z_AXIS,ARG1)
k2 = k2 + arg_incr(Z_AXIS,ARG2)
300 CONTINUE
l1 = l1 + arg_incr(T_AXIS,ARG1)
l2 = l2 + arg_incr(T_AXIS,ARG2)
400 CONTINUE
m1 = m1 + arg_incr(E_AXIS,ARG1)
m2 = m2 + arg_incr(E_AXIS,ARG2)
500 CONTINUE
n1 = n1 + arg_incr(F_AXIS,ARG1)
n2 = n2 + arg_incr(F_AXIS,ARG2)
600 CONTINUE
* ^
* |
* USER CONFIGURABLE PORTION |
* **********************************************************************
RETURN
END
function o2sato(T,S)
c
C ********************************************************************
C
C Computes the oxygen saturation concentration at 1 atm total pressure
c in mol/m^3 given the temperature (t, in deg C) and the salinity (s,
c in permil).
C
C FROM GARCIA AND GORDON (1992), LIMNOLOGY and OCEANOGRAPHY.
C THE FORMULA USED IS FROM PAGE 1310, EQUATION (8).
c
C *** NOTE: THE "A3*TS^2" TERM (IN THE PAPER) IS INCORRECT. ***
C *** IT SHOULDN'T BE THERE. ***
C
C o2sato IS DEFINED BETWEEN T(freezing) <= T <= 40(deg C) AND
c 0 permil <= S <= 42 permil
C C
C CHECK VALUE: T = 10.0 deg C, S = 35.0 permil,
c o2sato = 0.282015 mol/m^3
C
C ********************************************************************
c
DATA A0/ 2.00907 /,A1/ 3.22014 /, A2/ 4.05010 /,
$ A3/ 4.94457 /,A4/-2.56847E-1/, A5/ 3.88767 /
DATA B0/-6.24523E-3/,B1/-7.37614E-3/,
$ B2/-1.03410E-2/,B3/-8.17083E-3/
DATA C0/-4.88682E-7/
C
TT = 298.15-T
TK = 273.15+T
TS = ALOG(TT/TK)
TS2 = TS**2
TS3 = TS**3
TS4 = TS**4
TS5 = TS**5
CO = A0 + A1*TS + A2*TS2 + A3*TS3 + A4*TS4 + A5*TS5
$ + S*(B0 + B1*TS + B2*TS2 + B3*TS3)
$ + C0*(S*S)
o2sato = EXP(CO)
c
c Convert from ml/l to mol/m^3
c
o2sato = o2sato/22391.6*1000.0
C
RETURN
END