Skip to content

CICE version 5.1
Compare
Choose a tag to compare
@duvivier duvivier released this 30 Jan 18:19
· 378 commits to main since this release
cice-5.1
3791f34

New Features in CICE 5.1

physics

  • include uice, vice in atm-ice coupling updates (e.g. stress) for high frequency coupling
  • variable coefficient for ice-ocean heat flux

new namelist options

  • ''gridcpl_file'' allows ice coupling on different grid than computation (default off with no impact)
  • ''bfbflag'' controls bit-for-bit global sums for global_sum_dbl and global_sum_prod_dbl
  • ''natmiter'' for the number of iterations used in the atmo boundary layer routine.
  • ''highfreq'' for high-frequency coupling
  • additional ''grid_type='regional' '' (for RASM)
  • ''fbot_xfer_type'' allows variable coefficient for ice-ocean heat flux
  • ''l_mpond_fresh'' turns fresh water flux from topo ponds on/off
  • ''tfrz_option'' for ocean freezing temperature
  • ''kalg'' for algae influence on delta Eddington radiation
  • ''Cf'' for frictional dissipation during mechanical deformation
  • flags for additional output in history

bug fixes

  • vertical thermo: fix error abort messages
  • BL99 thermo: base temperature convergence check on 0 rather than puny
  • mushy thermo: correct double accounting of snow ice formation in coupling variables
  • mushy thermo: correct snow ice formation energy for nslyr > 1
  • level-ice ponds: fix dhlid for surface inversions
  • level-ice ponds: remove snowinfil option (default = ON)
  • level-ice ponds: do not reset dhs when restarting
  • topo ponds: limit snow fraction based on pond fraction
  • topo ponds: use category temperatures instead of average temperature
  • topo ponds: alter lid growth calculation
    *topo ponds: set limits for pond area, depth to avoid divide-by-zero
  • topo ponds: abort if brine salinity = 0
  • delta Eddington radiation: initialize AOPs within ij loop
  • delta Eddington ponds: use consistent array indices
  • evp: update stress tensor halos on the tripole grid
  • formdrag: calculate coefficients for ice cover fraction greater than 0.001
  • formdrag: remove extra ice-area multiplicative factors
  • formdrag: do not allow ridge height to be less than freeboard, or keel depth to be less than draft
  • transport: change indices from real to integer kind
  • mechanical redistribution: correct volume of snow lost in leads for nslyr > 1
  • zbgc: rearrange namelist read commands for NAG compiler
  • OpenMP: fix OMP directives
  • history: fix sice attributes for netCDF
  • pio: now works (in CESM only)
  • spacecurve: fix decomposition
  • initialization: aggregate all tracers upon restart initialization
  • initialization: indxi, indxj in ice_ocean.F90 and ice_step.F90
  • initialization: set level ice fraction = 1 when not restarting
  • initialization: update halos before aggregating when not restarting
  • initialization: set nonzero Cdn_atm
  • initialization: supply location and type information when reading tracer restart fields
  • restarts: fix restart_dir default setting
  • array-out-of-bounds error: alter conditionals in mpi/ice_boundary.F90
  • array-out-of-bounds error: wrap eice_init in l_conservation_check conditional
  • array-out-of-bounds error: make flux_bio optional
  • array-out-of-bounds error: calculate vice_init only if l_conservation_check=T
  • divide-by-zero error: avoid compiler complaints when nblyr=0 and vertical bgc grid is not used

other software enhancements

  • more flexible mpicom setting, fully backwards compatible
  • make ''nml_filename'' size 32 chars instead of 6.
  • add tr_pond_cesm check
  • add force_restart_now flag to allow external (CESM) to force a restart as needed
  • add check in ice distribution if number of blocks is too small
  • update missing value in netcdf output
  • refactor rad_to_deg conversion in history output for consistency and parallelism
  • modify history fields setting for histfreq field, more flexible and robust.
  • modify history fields f_ checking: move away from first char ''x'' limitation, more flexible.
  • history variables are now managed internally first by stream, then by variable
  • make time2sec public in ice_calendar
  • minor fix to order of ''call calendar'' in the v4 restart file subroutine
  • make orbital variables public
  • add bit-for-bit global sums for global_sum_dbl and global_sum_prod_dbl (''bfbflag'')
  • add ''grid_type='regional' ''
  • add ''uninit'' debugging flag
  • modify some save and intent statements
  • refactor enthalpy adjustment in layers for improved efficiency
  • open binary files for direct-access reading and writing on the extended grid
  • allow topo ponds to be used without the delta Eddington radiation scheme (''heat_capacity=F, calc_Tsfc=F'')

diagnostics and documentation

  • limit redistribution diagnostics to category 1
  • save full area, volume redistribution diagnostics instead of fractions
  • add age diagnostics
  • add total number of blocks diagnostic at initialization
  • add history fields (''vsnon, alvdf, alidf, fswint_ai, keffn_top, blkmask, uatm, vatm, fsensn_ai,'' 3D and 4D dimensions)
  • add ''io_flavor'' attribute to distinguish PIO from regular netcdf output
  • more specific title in netcdf files
  • ''print_points_state'' subroutine for explicit point diagnostics only
  • add sums to min, max diagnostics
  • turn on diagnostics when reading restart files
  • add doc/PDF/CMHB_IJHPCA2014.pdf
  • update cicedoc.pdf

CHANGES SPECIFIC TO MODELING CENTERS

Hadley Centre

  • correct ORCA grid size when using restart_ext
  • add cpp wrappers
  • add specific communicators
  • keep all blocks, including all-land blocks
  • fill ghost cells of all-land blocks with special values, on the extended grid

CESM/RASM

  • ''CCSMCOUPLED'' ifdef replaces ''CCSM'' and ''SEQ_MCT''
  • add ''coszen'' restart field
  • update abort process for CESM
  • add rpointer files
  • add output file naming convention
  • multiple instance support
  • support gregorian calendar in orbital settings
  • update cesm prescribed ice
  • CESM initialization needs
  • use different value of ''isec'' for CESM
  • modify ice-atm-ocean coupling (''Uref'') for CESM
  • add ''nextsw_cday'' for CESM use
  • add driver/cesm/
  • update Macros and run file for yellowstone
  • additional ''grid_type='regional' '' for RASM
  • adjust time for year_init
  • avoid certain grid-related code for prescribed-ice mode
Assets 2
Loading