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* rr_flux_sx.F
*
* Rick Romea
* Jan. 24, 2000
*
* Computes the zonal nonlinear advective flux term: -d(uS)/dx
* Units : (SALINITY(ppm) - 0.035) / s
* MOM2 Grid: T
*
*******************************************************************
SUBROUTINE RR_flux_sx_init(id)
IMPLICIT NONE
INCLUDE 'ferret_cmn/EF_Util.cmn'
INTEGER id
CALL ef_set_desc (id,
.'-d(uS)/dx advective momentum: flux-form (SALT/s);MOM2 T Grid.')
CALL ef_set_num_args (id, 2)
CALL ef_set_axis_inheritance (id, IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS)
CALL ef_set_piecemeal_ok (id, NO, NO, YES, YES)
CALL ef_set_arg_name (id, ARG1, 'U')
CALL ef_set_arg_desc (id, ARG1,
. 'Zonal velocity, on the MOM2 U Grid. ')
CALL ef_set_arg_unit (id, ARG1, 'cm/sec')
CALL ef_set_arg_type (id, ARG1, FLOAT_ARG)
CALL ef_set_axis_influence (id, ARG1, YES, YES, YES, YES)
CALL ef_set_axis_extend (id, ARG1, X_AXIS,-1,+1)
CALL ef_set_axis_extend (id, ARG1, Y_AXIS,-1,+1)
CALL ef_set_arg_name (id, ARG2, 'SALT')
CALL ef_set_arg_desc (id, ARG2,
. 'Salinity, on the MOM2 T Grid. ')
CALL ef_set_arg_unit (id, ARG2,
. '(SALINITY(ppt) - 35) /1000')
CALL ef_set_arg_type (id, ARG2, FLOAT_ARG)
CALL ef_set_axis_influence (id, ARG2, NO, NO, YES, YES)
CALL ef_set_axis_extend (id, ARG2, X_AXIS,-1,+1)
CALL ef_set_axis_extend (id, ARG2, Y_AXIS,-1,+1)
END
SUBROUTINE RR_flux_sx_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 bad_flag(EF_MAX_ARGS)
REAL bad_flag_result
REAL arg_1 (mem1lox:mem1hix, mem1loy:mem1hiy,
. mem1loz:mem1hiz, mem1lot:mem1hit)
REAL arg_2 (mem2lox:mem2hix, mem2loy:mem2hiy,
. mem2loz:mem2hiz, mem2lot:mem2hit)
REAL result (memreslox:memreshix,memresloy:memreshiy,
. memresloz:memreshiz,memreslot:memreshit)
INTEGER res_lo_ss (4)
INTEGER res_hi_ss (4)
INTEGER res_incr (4)
INTEGER arg_lo_ss (4,EF_MAX_ARGS)
INTEGER arg_hi_ss (4,EF_MAX_ARGS)
INTEGER arg_incr (4,EF_MAX_ARGS)
INTEGER i, j, k, l
INTEGER i1, j1, k1, l1
INTEGER i2, j2, k2, l2
REAL*8 yU(1024)
REAL*8 xU(1024)
REAL*8 yT(1024)
REAL*8 xT(1024)
INTEGER ilat
INTEGER ilon
CHARACTER *16 ax_name(4)
CHARACTER *16 ax_units(4)
LOGICAL backward(4)
LOGICAL modulo(4)
LOGICAL regular(4)
REAL dxt, dyt, dyu
REAL adv_vet, adv_fe, cst
INCLUDE 'rr_parameters.h'
C*********************************************************************
C
c dyt = latitudinal height of "t" grid box (in cm)
c dxt = longitudinal width of "t" grid box at the equator (cm)
c dyu = latitudinal height of "u,v" grid box (cm)
c yu(j) = latitude of the jth "u,v" point in degrees
c yt(j) = latitude of the jth "t" point in degrees
c xt(i) = longitude of the ith "t" point in degrees
c xu(i) = longitude of the ith "u,v" point in degrees
C
C*********************************************************************
! Statement functions
dxt(i) = SNGL (xU(i) - xU(i-1)) * Longitude_to_cm
dyt(j) = SNGL (yU(j) - yU(j-1)) * Latitude_to_cm
dyu(j) = SNGL (yT(j+1) - yT(j)) * Latitude_to_cm
adv_vet(i1,j1,k1,l1,iLat) = (arg_1(i1,j1,k1,l1)*dyu(iLat) +
. arg_1(i1,j1-1,k1,l1)*dyu(iLat-1)) /2./ dyt(iLat)
adv_fe (i1,j1,k1,l1,i2,j2,k2,l2,iLat) = adv_vet(i1,j1,k1,l1,iLat)
. *(arg_2(i2,j2,k2,l2) + arg_2(i2+1,j2,k2,l2))
! Get axis data
CALL ef_get_res_subscripts (id, res_lo_ss, res_hi_ss, res_incr)
CALL ef_get_arg_subscripts (id, arg_lo_ss, arg_hi_ss, arg_incr)
CALL ef_get_bad_flags (id, bad_flag, bad_flag_result)
CALL ef_get_coordinates (id, ARG1, X_AXIS,
. arg_lo_ss(X_AXIS,ARG1),
. arg_hi_ss(X_AXIS,ARG1), xU)
CALL ef_get_coordinates (id, ARG1, Y_AXIS,
. arg_lo_ss(Y_AXIS,ARG1),
. arg_hi_ss(Y_AXIS,ARG1), yU)
CALL ef_get_coordinates (id, ARG2, X_AXIS,
. arg_lo_ss(X_AXIS,ARG2),
. arg_hi_ss(X_AXIS,ARG2), xT)
CALL ef_get_coordinates (id, ARG2, Y_AXIS,
. arg_lo_ss(Y_AXIS,ARG2),
. arg_hi_ss(Y_AXIS,ARG2), yT)
! Check axis units: bail out if not lat and lon.
CALL ef_get_axis_info (id, ARG1, ax_name, ax_units,
. backward, modulo, regular)
IF ( ax_units(1) .NE. 'deg' .AND.
. ax_units(1) .NE. 'lon' .AND.
. ax_units(1) .NE. 'degrees_E' .AND.
. ax_units(1) .NE. 'longitude' .AND.
. ax_units(1) .NE. 'Longitude' .AND.
. ax_units(1) .NE. 'LONGITUDE' ) THEN
WRITE (6,*)'Longitude axis units =', ax_units(1)
!CALL ef_bail_out(id,'Longitude axis must be in degrees')
ENDIF
IF ( ax_units(2) .NE. 'deg' .AND.
. ax_units(2) .NE. 'lat' .AND.
. ax_units(2) .NE. 'degrees_N' .AND.
. ax_units(2) .NE. 'latitude' .AND.
. ax_units(2) .NE. 'Latitude' .AND.
. ax_units(2) .NE. 'LATITUDE' ) THEN
WRITE (6,*)'Latitude axis units =', ax_units(2)
!CALL ef_bail_out(id,'Latitude axis must be in degrees')
ENDIF
l1 = arg_lo_ss(T_AXIS,ARG1)
l2 = arg_lo_ss(T_AXIS,ARG2)
DO 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 k = res_lo_ss(Z_AXIS), res_hi_ss(Z_AXIS)
ilat = 2
j1 = arg_lo_ss(Y_AXIS,ARG1) + 1
j2 = arg_lo_ss(Y_AXIS,ARG2) + 1
DO j = res_lo_ss(Y_AXIS), res_hi_ss(Y_AXIS)
cst = cos(SNGL(yT(iLat)) * Degrees_to_radians)
iLon = 2
i1 = arg_lo_ss(X_AXIS,ARG1) + 1
i2 = arg_lo_ss(X_AXIS,ARG2) + 1
DO i = res_lo_ss(X_AXIS), res_hi_ss(X_AXIS)
IF (
. arg_1(i1, j1, k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1+1,j1, k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1-1,j1, k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1, j1+1,k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1+1,j1+1,k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1-1,j1+1,k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1, j1-1,k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1+1,j1-1,k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_1(i1-1,j1-1,k1,l1) .EQ. bad_flag(ARG1) .OR.
. arg_2(i2, j2, k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2+1,j2, k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2-1,j2, k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2, j2+1,k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2+1,j2+1,k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2-1,j2+1,k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2, j2-1,k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2+1,j2-1,k2,l2) .EQ. bad_flag(ARG2) .OR.
. arg_2(i2-1,j2-1,k2,l2) .EQ. bad_flag(ARG2)
. )THEN
result(i,j,k,l) = bad_flag_result
ELSE
result(i,j,k,l) =
. - (adv_fe(i1,j1,k1,l1,i2,j2,k2,l2,iLat) -
. adv_fe(i1-1,j1,k1,l1,i2-1,j2,k2,l2,iLat))
. /2./dxt(iLon)/cst*sec_per_month
ENDIF
iLon = iLon + 1
i1 = i1 + arg_incr(X_AXIS,ARG1)
i2 = i2 + arg_incr(X_AXIS,ARG2)
ENDDO
iLat = iLat + 1
j1 = j1 + arg_incr(Y_AXIS,ARG1)
j2 = j2 + arg_incr(Y_AXIS,ARG2)
ENDDO
k1 = k1 + arg_incr(Z_AXIS,ARG1)
k2 = k2 + arg_incr(Z_AXIS,ARG2)
ENDDO
l1 = l1 + arg_incr(T_AXIS,ARG1)
l2 = l2 + arg_incr(T_AXIS,ARG2)
ENDDO
END
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