!     ==========================================================
!     | CPL_MPMICE
!     | Declare MPI tags for each variable to be exchanged
!     | between MITgcm and MPMice
!     |----------------------------------------------------------
!     | Note: North/South/East/West and zonal/meridional below
!     | refer to grid, not geographical coordinates.
!     ==========================================================

!     TimeIntervalTag
!     time interval between communications (s): scalar Real*8

!     OceanTimeTag
!     ocean model time (s): scalar Real*8

!     IceTimeTag
!     ice model time (s): scalar Real*8

!     OceanGridsizeTag
!     ocean model Nx and Ny dimensions: 2 integers

!     AreaBcTag
!     open boundary ice area (fractional: 0-1) at the tracer points
!     2*(Nx+Ny)-4 Real*8 array
!     i=[1:Nx       Nx*ones(1,Ny-1) (Nx-1):-1:1     ones(1,Ny-2)];
!     j=[ones(1,Nx) 2:Ny            Ny*ones(1,Nx-1) (Ny-1):-1:2 ];

!     HeffBcTag
!     open boundary effective ice thickness (m)
!     actual thickness for single-class ice would be thickness/area
!     at the tracer points
!     2*(Nx+Ny)-4 Real*8 array
!     i=[1:Nx       Nx*ones(1,Ny-1) (Nx-1):-1:1     ones(1,Ny-2)];
!     j=[ones(1,Nx) 2:Ny            Ny*ones(1,Nx-1) (Ny-1):-1:2 ];

!     HsnowBcTag
!     open boundary effective snow thickness (m)
!     actual thickness for single-class snow would be thickness/area
!     at the tracer points
!     2*(Nx+Ny)-4 Real*8 array
!     i=[1:Nx       Nx*ones(1,Ny-1) (Nx-1):-1:1     ones(1,Ny-2)];
!     j=[ones(1,Nx) 2:Ny            Ny*ones(1,Nx-1) (Ny-1):-1:2 ];

!     HsaltBcTag
!     open boundary effective sea ice salinity (g/m2)
!     at the tracer points
!     2*(Nx+Ny)-4 Real*8 array
!     i=[1:Nx       Nx*ones(1,Ny-1) (Nx-1):-1:1     ones(1,Ny-2)];
!     j=[ones(1,Nx) 2:Ny            Ny*ones(1,Nx-1) (Ny-1):-1:2 ];

!     UiceBcTag
!     open boundary zonal velocity (m/s)
!     specified at the inside edge of the outer grid cells
!     southwest C-grid locations for normal component and at the
!     southwest C-grid locations for tangential
!     >0 from West to East
!     2*(Nx+Ny)-6 Real*8 array
!     i=[2:Nx         Nx*ones(1,Ny-1) (Nx-1):-1:2     2*ones(1,Ny-2)];
!     j=[ones(1,Nx-1) 2:Ny            Ny*ones(1,Nx-2) (Ny-1):-1:2   ];

!     ViceBcTag
!     open boundary meridional velocity (m/s)
!     specified at the inside edge of the outer grid cells
!     southwest C-grid locations for normal component and at the
!     southwest C-grid locations for tangential
!     >0 from South to North
!     2*(Nx+Ny)-6 Real*8 array
!     i=[1:Nx         Nx*ones(1,Ny-2) (Nx-1):-1:1     ones(1,Ny-3)];
!     j=[2*ones(1,Nx) 3:Ny            Ny*ones(1,Nx-1) (Ny-1):-1:3 ];

!     AreaTag
!     ice area (fractional: 0-1) at the tracer points
!     Nx * Ny Real*8 array

!     HeffTag
!     effective ice thickness (mean thickness in the grid box in m)
!     actual thickness for single-class ice would be thickness/area
!     at the tracer points
!     Nx * Ny Real*8 array

!     HsnowTag
!     effective snow thickness (mean thickness in the grid box in m)
!     actual thickness for single-class snow would be thickness/area
!     at the tracer points
!     Nx * Ny Real*8 array

!     HsaltTag
!     effective sea ice salinity (g/m2)
!     at the tracer points
!     Nx * Ny Real*8 array

!     UwindTag
!     10-m u-wind at the tracer points (m/s)
!     >0 from West to East
!     Nx * Ny Real*8 array

!     VwindTag
!     10-m v-wind at the tracer points (m/s)
!     >0 from South to North
!     Nx * Ny Real*8 array

!     LwDownTag
!     downward longwave at the tracer points (W/m2)
!     > 0 for increase in theta (ocean warming)
!     Nx * Ny Real*8 array

!     SwDownTag
!     downward shortwave at the tracer points (W/m2)
!     > 0 for increase in theta (ocean warming)
!     Nx * Ny Real*8 array

!     AtempTag
!     2-m air temperature at the tracer points (deg K)
!     Nx * Ny Real*8 array

!     AqhTag
!     2-m specific humidity at the tracer points (kg/kg)
!     Nx * Ny Real*8 array

!     PrecipTag
!     precipitation at the tracer points (m/s)
!     > 0 for decrease in salt (ocean salinity)
!     Nx * Ny Real*8 array

!     SstTag
!     sea surface temperature at the tracer points (deg C)
!     Nx * Ny Real*8 array

!     UvelTag
!     sea surface zonal velocity (m/s)
!     at southwest c-grid locations
!     Nx * Ny Real*8 array

!     VvelTag
!     sea surface meridional velocity (m/s)
!     at southwest c-grid locations
!     Nx * Ny Real*8 array

!     UstressTag
!     zonal stress under ice at southwest c-grid locations (N/m^2)
!     Nx * Ny Real*8 array

!     VstressTag
!     meridional stress under ice at southwest c-grid locations (N/m^2)
!     Nx * Ny Real*8 array

!     SwResidTag
!     residual shortwave under ice at tracer point (W/m2)
!     > 0 for increase in theta (ocean warming)
!     Nx * Ny Real*8 array

!     HeatFluxTag
!     heat flux (less shortwave) at tracer point (W/m2)
!     > 0 for increase in theta (ocean warming)
!     Nx * Ny Real*8 array

!     WaterFluxTag
!     freshwater flux at tracer point (m/s)
!     > 0 for decrease in ocean salinity
!     Nx * Ny Real*8 array

!     SaltFluxTag
!     salt flux at tracer point (g/m^2/s)
!     > 0 for increase in ocean salinity
!     Nx * Ny Real*8 array

      INTEGER     TimeIntervalTag
      INTEGER     OceanTimeTag
      INTEGER     IceTimeTag
      INTEGER     OceanGridsizeTag
      INTEGER     AreaBcTag
      INTEGER     HeffBcTag
      INTEGER     HsnowBcTag
      INTEGER     HsaltBcTag
      INTEGER     UiceBcTag
      INTEGER     ViceBcTag
      INTEGER     AreaTag
      INTEGER     HeffTag
      INTEGER     HsnowTag
      INTEGER     HsaltTag
      INTEGER     UwindTag
      INTEGER     VwindTag
      INTEGER     LwDownTag
      INTEGER     SwDownTag
      INTEGER     AtempTag
      INTEGER     AqhTag
      INTEGER     PrecipTag
      INTEGER     SstTag
      INTEGER     UvelTag
      INTEGER     VvelTag
      INTEGER     UstressTag
      INTEGER     VstressTag
      INTEGER     SwResidTag
      INTEGER     HeatFluxTag
      INTEGER     WaterFluxTag
      INTEGER     SaltFluxTag

      PARAMETER ( TimeIntervalTag  = 10001000 )
      PARAMETER ( OceanTimeTag     = 10001001 )
      PARAMETER ( IceTimeTag       = 10001002 )
      PARAMETER ( OceanGridsizeTag = 10002001 )
      PARAMETER ( AreaBcTag        = 10003001 )
      PARAMETER ( HeffBcTag        = 10003002 )
      PARAMETER ( HsnowBcTag       = 10003003 )
      PARAMETER ( HsaltBcTag       = 10003004 )
      PARAMETER ( UiceBcTag        = 10003005 )
      PARAMETER ( ViceBcTag        = 10003006 )
      PARAMETER ( AreaTag          = 10004001 )
      PARAMETER ( HeffTag          = 10004002 )
      PARAMETER ( HsnowTag         = 10004003 )
      PARAMETER ( HsaltTag         = 10004004 )
      PARAMETER ( UwindTag         = 10005001 )
      PARAMETER ( VwindTag         = 10005002 )
      PARAMETER ( LwDownTag        = 10005101 )
      PARAMETER ( SwDownTag        = 10005102 )
      PARAMETER ( AtempTag         = 10005103 )
      PARAMETER ( AqhTag           = 10005104 )
      PARAMETER ( PrecipTag        = 10005105 )
      PARAMETER ( SstTag           = 10005201 )
      PARAMETER ( UvelTag          = 10005202 )
      PARAMETER ( VvelTag          = 10005203 )
      PARAMETER ( UstressTag       = 10006001 )
      PARAMETER ( VstressTag       = 10006002 )
      PARAMETER ( SwResidTag       = 20006101 )
      PARAMETER ( HeatFluxTag      = 20006102 )
      PARAMETER ( WaterFluxTag     = 20006103 )
      PARAMETER ( SaltFluxTag      = 20006104 )