SUBROUTINE tl_get_data (ng)
!
!git $Id$
!svn $Id: tl_get_data.F 1151 2023-02-09 03:08:53Z arango $
!================================================== Hernan G. Arango ===
!  Copyright (c) 2002-2023 The ROMS/TOMS Group                         !
!    Licensed under a MIT/X style license                              !
!    See License_ROMS.md                                               !
!=======================================================================
!                                                                      !
!  This routine reads in forcing, climatology and other data from      !
!  NetCDF files.  If there is more than one time-record,  data is      !
!  loaded into global  two-time  record arrays. The interpolation      !
!  is carried elsewhere.                                               !
!                                                                      !
!  Currently, this routine is only executed in serial mode by the      !
!  main thread.                                                        !
!                                                                      !
!=======================================================================
!
      USE mod_param
      USE mod_boundary
      USE mod_coupling
      USE mod_clima
      USE mod_forces
      USE mod_grid
      USE mod_iounits
      USE mod_mixing
      USE mod_ncparam
      USE mod_ocean
      USE mod_scalars
      USE mod_sources
      USE mod_stepping
!
      USE strings_mod, ONLY : FoundError
!
      implicit none
!
!  Imported variable declarations.
!
      integer, intent(in) :: ng
!
!  Local variable declarations.
!
      logical, save :: recordless = .FALSE.
      logical, dimension(3) :: update =                                 &
     &         (/ .FALSE., .FALSE., .FALSE. /)
!
      integer :: ILB, IUB, JLB, JUB
      integer :: LBi, UBi, LBj, UBj
      integer :: i, ic, my_tile
!
      real(r8) :: scale
!
      character (len=*), parameter :: MyFile =                          &
     &  "ROMS/Tangent/tl_get_data.F"
!
!  Lower and upper bounds for nontiled (global values) boundary arrays.
!
      my_tile=-1                           ! for global values
      ILB=BOUNDS(ng)%LBi(my_tile)
      IUB=BOUNDS(ng)%UBi(my_tile)
      JLB=BOUNDS(ng)%LBj(my_tile)
      JUB=BOUNDS(ng)%UBj(my_tile)
!
!  Lower and upper bounds for tiled arrays.
!
      LBi=LBOUND(GRID(ng)%h,DIM=1)
      UBi=UBOUND(GRID(ng)%h,DIM=1)
      LBj=LBOUND(GRID(ng)%h,DIM=2)
      UBj=UBOUND(GRID(ng)%h,DIM=2)
!
!-----------------------------------------------------------------------
!  Turn on input data time wall clock.
!-----------------------------------------------------------------------
!
      CALL wclock_on (ng, iTLM, 3, 89, MyFile)
!
!=======================================================================
!  Read in forcing data from FORCING NetCDF file.
!=======================================================================
!
!-----------------------------------------------------------------------
!  Point Sources/Sinks time dependent data.
!-----------------------------------------------------------------------
!
!  Point Source/Sink vertically integrated mass transport.
!
      IF (LuvSrc(ng).or.LwSrc(ng)) THEN
        CALL get_ngfld (ng, iTLM, idRtra, SSF(ng)%ncid,                 &
     &                  1, SSF(ng), recordless, update(1),              &
     &                  1, Nsrc(ng), 1, 2, 1, Nsrc(ng), 1,              &
     &                  SOURCES(ng) % QbarG)
        IF (FoundError(exit_flag, NoError, 112, MyFile)) RETURN
      END IF
!
!  Tracer Sources/Sinks.
!
      DO i=1,NT(ng)
        IF (LtracerSrc(i,ng)) THEN
          CALL get_ngfld (ng, iTLM, idRtrc(i), SSF(ng)%ncid,            &
     &                    1, SSF(ng), recordless, update(1),            &
     &                    1, Nsrc(ng), N(ng), 2, 1, Nsrc(ng), N(ng),    &
     &                    SOURCES(ng) % TsrcG(:,:,:,i))
          IF (FoundError(exit_flag, NoError, 128, MyFile)) RETURN
        END IF
      END DO
!
!-----------------------------------------------------------------------
!  Surface wind stress components from NLM forward file.
!-----------------------------------------------------------------------
!
      CALL get_2dfld (ng, iTLM, idUsms, BLK(ng)%ncid,                   &
     &                1, BLK(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % umask,                                 &
     &                FORCES(ng) % sustrG)
      IF (FoundError(exit_flag, NoError, 217, MyFile)) RETURN
!
      CALL get_2dfld (ng, iTLM, idVsms, BLK(ng)%ncid,                   &
     &                1, BLK(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % vmask,                                 &
     &                FORCES(ng) % svstrG)
      IF (FoundError(exit_flag, NoError, 229, MyFile)) RETURN
!
!-----------------------------------------------------------------------
!  Surface air pressure from NLM forward file.
!-----------------------------------------------------------------------
!
      CALL get_2dfld (ng, iTLM, idPair, BLK(ng)%ncid,                   &
     &                1, BLK(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % rmask,                                 &
     &                FORCES(ng) % PairG)
      IF (FoundError(exit_flag, NoError, 269, MyFile)) RETURN
!
!-----------------------------------------------------------------------
!  Surface solar shortwave radiation from NLM forward file.
!-----------------------------------------------------------------------
!
      CALL get_2dfld (ng, iTLM, idSrad, BLK(ng)%ncid,                   &
     &                1, BLK(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % rmask,                                 &
     &                FORCES(ng) % srflxG)
      IF (FoundError(exit_flag, NoError, 437, MyFile)) RETURN
!
!-----------------------------------------------------------------------
!  Surface net heat flux from NLM forward file.
!-----------------------------------------------------------------------
!
      CALL get_2dfld (ng, iTLM, idTsur(itemp), BLK(ng)%ncid,            &
     &                1, BLK(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % rmask,                                 &
     &                FORCES(ng) % stfluxG(:,:,:,itemp))
      IF (FoundError(exit_flag, NoError, 602, MyFile)) RETURN
!
!-----------------------------------------------------------------------
!  Surface net freshwater flux (E-P) from NLM forward file.
!-----------------------------------------------------------------------
!
      CALL get_2dfld (ng, iTLM, idEmPf, BLK(ng)%ncid,                   &
     &                1, BLK(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % rmask,                                 &
     &                FORCES(ng) % stfluxG(:,:,:,isalt))
      IF (FoundError(exit_flag, NoError, 704, MyFile)) RETURN
!
!=======================================================================
!  Read in open boundary conditions from BOUNDARY NetCDF file.
!=======================================================================
!
      IF (LprocessOBC(ng)) THEN
        IF (tl_LBC(iwest,isFsur,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idZbry(iwest),                      &
     &                    BRYncid(idZbry(iwest),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, 1, 2, 0, Mm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % zetaG_west)
          IF (FoundError(exit_flag, NoError, 809, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(ieast,isFsur,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idZbry(ieast),                      &
     &                    BRYncid(idZbry(ieast),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, 1, 2, 0, Mm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % zetaG_east)
          IF (FoundError(exit_flag, NoError, 822, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(isouth,isFsur,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idZbry(isouth),                     &
     &                    BRYncid(idZbry(isouth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, 1, 2, 0, Lm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % zetaG_south)
          IF (FoundError(exit_flag, NoError, 835, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(inorth,isFsur,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idZbry(inorth),                     &
     &                    BRYncid(idZbry(inorth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, 1, 2, 0, Lm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % zetaG_north)
          IF (FoundError(exit_flag, NoError, 848, MyFile)) RETURN
        END IF
      END IF
!
      IF (LprocessOBC(ng)) THEN
        IF (tl_LBC(iwest,isUbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU2bc(iwest),                      &
     &                    BRYncid(idU2bc(iwest),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, 1, 2, 0, Mm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % ubarG_west)
          IF (FoundError(exit_flag, NoError, 866, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(iwest,isVbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV2bc(iwest),                      &
     &                    BRYncid(idV2bc(iwest),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, 1, 2, 1, Mm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % vbarG_west)
          IF (FoundError(exit_flag, NoError, 879, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(ieast,isUbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU2bc(ieast),                      &
     &                    BRYncid(idU2bc(ieast),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, 1, 2, 0, Mm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % ubarG_east)
          IF (FoundError(exit_flag, NoError, 892, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(ieast,isVbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV2bc(ieast),                      &
     &                    BRYncid(idV2bc(ieast),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, 1, 2, 1, Mm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % vbarG_east)
          IF (FoundError(exit_flag, NoError, 905, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(isouth,isUbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU2bc(isouth),                     &
     &                    BRYncid(idU2bc(isouth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, 1, 2, 1, Lm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % ubarG_south)
          IF (FoundError(exit_flag, NoError, 918, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(isouth,isVbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV2bc(isouth),                     &
     &                    BRYncid(idV2bc(isouth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, 1, 2, 0, Lm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % vbarG_south)
          IF (FoundError(exit_flag, NoError, 931, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(inorth,isUbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU2bc(inorth),                     &
     &                    BRYncid(idU2bc(inorth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, 1, 2, 1, Lm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % ubarG_north)
          IF (FoundError(exit_flag, NoError, 944, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(inorth,isVbar,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV2bc(inorth),                     &
     &                    BRYncid(idV2bc(inorth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, 1, 2, 0, Lm(ng)+1, 1,               &
     &                    BOUNDARY(ng) % vbarG_north)
          IF (FoundError(exit_flag, NoError, 957, MyFile)) RETURN
        END IF
      END IF
!
      IF (LprocessOBC(ng)) THEN
        IF (tl_LBC(iwest,isUvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU3bc(iwest),                      &
     &                    BRYncid(idU3bc(iwest),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, N(ng), 2, 0, Mm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % uG_west)
          IF (FoundError(exit_flag, NoError, 976, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(iwest,isVvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV3bc(iwest),                      &
     &                    BRYncid(idV3bc(iwest),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, N(ng), 2, 1, Mm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % vG_west)
          IF (FoundError(exit_flag, NoError, 989, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(ieast,isUvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU3bc(ieast),                      &
     &                    BRYncid(idU3bc(ieast),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, N(ng), 2, 0, Mm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % uG_east)
          IF (FoundError(exit_flag, NoError, 1002, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(ieast,isVvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV3bc(ieast),                      &
     &                    BRYncid(idV3bc(ieast),ng),                    &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    JLB, JUB, N(ng), 2, 1, Mm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % vG_east)
          IF (FoundError(exit_flag, NoError, 1015, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(isouth,isUvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU3bc(isouth),                     &
     &                    BRYncid(idU3bc(isouth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, N(ng), 2, 1, Lm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % uG_south)
          IF (FoundError(exit_flag, NoError, 1028, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(isouth,isVvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV3bc(isouth),                     &
     &                    BRYncid(idV3bc(isouth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, N(ng), 2, 0, Lm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % vG_south)
          IF (FoundError(exit_flag, NoError, 1041, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(inorth,isUvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idU3bc(inorth),                     &
     &                    BRYncid(idU3bc(inorth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, N(ng), 2, 1, Lm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % uG_north)
          IF (FoundError(exit_flag, NoError, 1054, MyFile)) RETURN
        END IF
!
        IF (tl_LBC(inorth,isVvel,ng)%acquire) THEN
          CALL get_ngfld (ng, iTLM, idV3bc(inorth),                     &
     &                    BRYncid(idV3bc(inorth),ng),                   &
     &                    nBCfiles(ng), BRY(1,ng),                      &
     &                    recordless, update(1),                        &
     &                    ILB, IUB, N(ng), 2, 0, Lm(ng)+1, N(ng),       &
     &                    BOUNDARY(ng) % vG_north)
          IF (FoundError(exit_flag, NoError, 1067, MyFile)) RETURN
        END IF
      END IF
!
      IF (LprocessOBC(ng)) THEN
        DO i=1,NT(ng)
          IF (tl_LBC(iwest,isTvar(i),ng)%acquire) THEN
            CALL get_ngfld (ng, iTLM, idTbry(iwest,i),                  &
     &                      BRYncid(idTbry(iwest,i),ng),                &
     &                      nBCfiles(ng), BRY(1,ng),                    &
     &                      recordless, update(1),                      &
     &                      JLB, JUB, N(ng), 2, 0, Mm(ng)+1, N(ng),     &
     &                      BOUNDARY(ng) % tG_west(:,:,:,i))
            IF (FoundError(exit_flag, NoError, 1086, MyFile)) RETURN
          END IF
        END DO
!
        DO i=1,NT(ng)
          IF (tl_LBC(ieast,isTvar(i),ng)%acquire) THEN
            CALL get_ngfld (ng, iTLM, idTbry(ieast,i),                  &
     &                      BRYncid(idTbry(ieast,i),ng),                &
     &                      nBCfiles(ng), BRY(1,ng),                    &
     &                      recordless, update(1),                      &
     &                      JLB, JUB, N(ng), 2, 0, Mm(ng)+1, N(ng),     &
     &                      BOUNDARY(ng) % tG_east(:,:,:,i))
            IF (FoundError(exit_flag, NoError, 1101, MyFile)) RETURN
          END IF
        END DO
!
        DO i=1,NT(ng)
          IF (tl_LBC(isouth,isTvar(i),ng)%acquire) THEN
            CALL get_ngfld (ng, iTLM, idTbry(isouth,i),                 &
     &                      BRYncid(idTbry(isouth,i),ng),               &
     &                      nBCfiles(ng), BRY(1,ng),                    &
     &                      recordless, update(1),                      &
     &                      ILB, IUB, N(ng), 2, 0, Lm(ng)+1, N(ng),     &
     &                      BOUNDARY(ng) % tG_south(:,:,:,i))
            IF (FoundError(exit_flag, NoError, 1116, MyFile)) RETURN
          END IF
        END DO
!
        DO i=1,NT(ng)
          IF (tl_LBC(inorth,isTvar(i),ng)%acquire) THEN
            CALL get_ngfld (ng, iTLM, idTbry(inorth,i),                 &
     &                      BRYncid(idTbry(inorth,i),ng),               &
     &                      nBCfiles(ng), BRY(1,ng),                    &
     &                      recordless, update(1),                      &
     &                      ILB, IUB, N(ng), 2, 0, Lm(ng)+1, N(ng),     &
     &                      BOUNDARY(ng) % tG_north(:,:,:,i))
            IF (FoundError(exit_flag, NoError, 1131, MyFile)) RETURN
          END IF
        END DO
      END IF
!
!=======================================================================
!  Read in data from Climatology NetCDF file.
!=======================================================================
!
!  Free-surface.
!
      IF (LsshCLM(ng)) THEN
        CALL get_2dfld (ng, iTLM, idSSHc, CLMncid(idSSHc,ng),           &
     &                  nCLMfiles(ng), CLM(1,ng), update(1),            &
     &                  LBi, UBi, LBj, UBj, 2, 1,                       &
     &                  GRID(ng) % rmask,                               &
     &                  CLIMA(ng) % sshG)
        IF (FoundError(exit_flag, NoError, 1157, MyFile)) RETURN
      END IF
!
!  2D momentum.
!
      IF (Lm2CLM(ng)) THEN
        CALL get_2dfld (ng, iTLM, idUbcl, CLMncid(idUbcl,ng),           &
     &                  nCLMfiles(ng), CLM(1,ng), update(1),            &
     &                  LBi, UBi, LBj, UBj, 2, 1,                       &
     &                  GRID(ng) % umask,                               &
     &                  CLIMA(ng) % ubarclmG)
        IF (FoundError(exit_flag, NoError, 1175, MyFile)) RETURN
!
        CALL get_2dfld (ng, iTLM, idVbcl, CLMncid(idVbcl,ng),           &
     &                  nCLMfiles(ng), CLM(1,ng), update(1),            &
     &                  LBi, UBi, LBj, UBj, 2, 1,                       &
     &                  GRID(ng) % vmask,                               &
     &                  CLIMA(ng) % vbarclmG)
        IF (FoundError(exit_flag, NoError, 1187, MyFile)) RETURN
      END IF
!
!  3D momentum.
!
      IF (Lm3CLM(ng)) THEN
        CALL get_3dfld (ng, iTLM, idUclm, CLMncid(idUclm,ng),           &
     &                  nCLMfiles(ng), CLM(1,ng), update(1),            &
     &                  LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,             &
     &                  GRID(ng) % umask,                               &
     &                  CLIMA(ng) % uclmG)
        IF (FoundError(exit_flag, NoError, 1206, MyFile)) RETURN
!
        CALL get_3dfld (ng, iTLM, idVclm, CLMncid(idVclm,ng),           &
     &                  nCLMfiles(ng), CLM(1,ng), update(1),            &
     &                  LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,             &
     &                  GRID(ng) % vmask,                               &
     &                  CLIMA(ng) % vclmG)
        IF (FoundError(exit_flag, NoError, 1218, MyFile)) RETURN
      END IF
!
!  Tracers.
!
      ic=0
      DO i=1,NT(ng)
        IF (LtracerCLM(i,ng)) THEN
          ic=ic+1
          CALL get_3dfld (ng, iTLM, idTclm(i),                          &
     &                    CLMncid(idTclm(i),ng),                        &
     &                    nCLMfiles(ng), CLM(1,ng), update(1),          &
     &                    LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,           &
     &                    GRID(ng) % rmask,                             &
     &                    CLIMA(ng) % tclmG(:,:,:,:,ic))
          IF (FoundError(exit_flag, NoError, 1240, MyFile)) RETURN
        END IF
      END DO
!
!-----------------------------------------------------------------------
!  Read in forward state solution.
!-----------------------------------------------------------------------
!
!  Read in free-surface.
!
      CALL get_2dfld (ng, iTLM, idFsur, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % rmask,                                 &
     &                OCEAN(ng) % zetaG)
      IF (FoundError(exit_flag, NoError, 1264, MyFile)) RETURN
!
!  Read 2D momentum.
!
      CALL get_2dfld (ng, iTLM, idUbar, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % umask,                                 &
     &                OCEAN(ng) % ubarG)
      IF (FoundError(exit_flag, NoError, 1278, MyFile)) RETURN
      CALL get_2dfld (ng, iTLM, idVbar, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % vmask,                                 &
     &                OCEAN(ng) % vbarG)
      IF (FoundError(exit_flag, NoError, 1290, MyFile)) RETURN
!
!  Read in variables associated with time-averaged 2D momentum terms.
!
      CALL get_2dfld (ng, iTLM, idUfx1, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % umask,                                 &
     &                COUPLING(ng) % DU_avg1G)
      IF (FoundError(exit_flag, NoError, 1347, MyFile)) RETURN
!
      CALL get_2dfld (ng, iTLM, idUfx2, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % umask,                                 &
     &                COUPLING(ng) % DU_avg2G)
      IF (FoundError(exit_flag, NoError, 1359, MyFile)) RETURN
!
      CALL get_2dfld (ng, iTLM, idVfx1, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % vmask,                                 &
     &                COUPLING(ng) % DV_avg1G)
      IF (FoundError(exit_flag, NoError, 1371, MyFile)) RETURN
!
      CALL get_2dfld (ng, iTLM, idVfx2, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 2, 1,                         &
     &                GRID(ng) % vmask,                                 &
     &                COUPLING(ng) % DV_avg2G)
      IF (FoundError(exit_flag, NoError, 1383, MyFile)) RETURN
!
!  Read in 3D momentum.
!
      CALL get_3dfld (ng, iTLM, idUvel, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,               &
     &                GRID(ng) % umask,                                 &
     &                OCEAN(ng) % uG)
      IF (FoundError(exit_flag, NoError, 1397, MyFile)) RETURN
!
      CALL get_3dfld (ng, iRPM, idVvel, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,               &
     &                GRID(ng) % vmask,                                 &
     &                OCEAN(ng) % vG)
      IF (FoundError(exit_flag, NoError, 1409, MyFile)) RETURN
!
!  Read in 3D tracers.
!
      DO i=1,NT(ng)
        CALL get_3dfld (ng, iTLM, idTvar(i), FWD(ng)%ncid,              &
     &                  1, FWD(ng), update(1),                          &
     &                  LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,             &
     &                  GRID(ng) % rmask,                               &
     &                  OCEAN(ng) % tG(:,:,:,:,i))
        IF (FoundError(exit_flag, NoError, 1477, MyFile)) RETURN
      END DO
!
!  Read in vertical mixing variables.
!
      DO i=1,NAT
        scale=Fscale(idDiff(i),ng)                    ! save and rescale
        Fscale(idDiff(i),ng)=tl_Akt_fac(i,ng)
        CALL get_3dfld (ng, iTLM, idDiff(i), FWD(ng)%ncid,              &
     &                  1, FWD(ng), update(1),                          &
     &                  LBi, UBi, LBj, UBj, 0, N(ng), 2, 1,             &
     &                  GRID(ng) % rmask,                               &
     &                  MIXING(ng) % AktG(:,:,:,:,i))
        Fscale(idDiff(i),ng)=scale
        IF (FoundError(exit_flag, NoError, 1498, MyFile)) RETURN
      END DO
!
      scale=Fscale(idVvis,ng)                         ! save and rescale
      Fscale(idVvis,ng)=tl_Akv_fac(ng)
      CALL get_3dfld (ng, iTLM, idVvis, FWD(ng)%ncid,                   &
     &                1, FWD(ng), update(1),                            &
     &                LBi, UBi, LBj, UBj, 0, N(ng), 2, 1,               &
     &                GRID(ng) % rmask,                                 &
     &                MIXING(ng) % AkvG)
      Fscale(idVvis,ng)=scale
      IF (FoundError(exit_flag, NoError, 1514, MyFile)) RETURN
!
!-----------------------------------------------------------------------
!  Read frequent impulse forcing for weak constraint.
!-----------------------------------------------------------------------
!
      IF (FrequentImpulse(ng)) THEN
        CALL get_2dfld (ng, iTLM, idZtlf, TLF(ng)%ncid,                 &
     &                  1, TLF(ng), update(1),                          &
     &                  LBi, UBi, LBj, UBj, 2, 1,                       &
     &                  GRID(ng) % rmask,                               &
     &                  OCEAN(ng) % f_zetaG)
        IF (FoundError(exit_flag, NoError, 1664, MyFile)) RETURN
!
!  Read in 3D momentum forcing.
!
        CALL get_3dfld (ng, iTLM, idUtlf, TLF(ng)%ncid,                 &
     &                  1, TLF(ng), update(1),                          &
     &                  LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,             &
     &                  GRID(ng) % umask,                               &
     &                  OCEAN(ng) % f_uG)
        IF (FoundError(exit_flag, NoError, 1709, MyFile)) RETURN
!
        CALL get_3dfld (ng, iTLM, idVtlf, TLF(ng)%ncid,                 &
     &                  1, TLF(ng), update(1),                          &
     &                  LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,             &
     &                  GRID(ng) % vmask,                               &
     &                  OCEAN(ng) % f_vG)
        IF (FoundError(exit_flag, NoError, 1721, MyFile)) RETURN
!
!  Read in 3D tracers forcing.
!
        DO i=1,NT(ng)
          CALL get_3dfld (ng, iTLM, idTtlf(i), TLF(ng)%ncid,            &
     &                    1, TLF(ng), update(1),                        &
     &                    LBi, UBi, LBj, UBj, 1, N(ng), 2, 1,           &
     &                    GRID(ng) % rmask,                             &
     &                    OCEAN(ng) % f_tG(:,:,:,:,i))
          IF (FoundError(exit_flag, NoError, 1736, MyFile)) RETURN
        END DO
      END IF
!
!-----------------------------------------------------------------------
!  Turn off input data time wall clock.
!-----------------------------------------------------------------------
!
      CALL wclock_off (ng, iTLM, 3, 1749, MyFile)
!
      RETURN
      END SUBROUTINE tl_get_data