Icepack Recent Changes

Important changes to the code on the master branch since the last numbered release

Date of last update: 26 Oct 2023

By: T. Craig

Last numbered release: Icepack v1.3.4 (Sept 11, 2023)

Major Changes

• Merge E3SM initial integration branch #460, #468
  • update dEdd shortwave and snicar including new hardcoded lookup tables, 3-band and 5-band options, and support for 'dEdd_snicar_ad' as a shortwave option.
  • Update modal aerosols (Changes modal aerosol results in Icepack)
  • Update public interfaces (Impacts backward compatibility)
    • remove nspint public parameters
    • add icepack_init_radiation, icepack_salinity_profile, icepack_enthalpy_mush, icepack_warnings_getall
    • modify icepack_prep_radiation, remove scalar parameters (ncat, nilyr, nslyr)
    • modify icepack_step_radiation, remove scalar parameters (ncat, nblyr, nilyr, nslyr, dEdd_algae, calendar_type, days_per_year, nextsw_cday, modal_aero), remove snicar table data arguments
    • add Tf argument to icepack_compute_tracers, icepack_aggregate, icepack_step_ridge,
  • Update icepack parameters, add hi_min, Tliquidus_max, snw_ssp_table, 'dEdd_snicar_ad' option to shortwave, 'constant' to tfrz_option
  • Update the Tf implementation to make values internally consistent. Remove hardcoded Tocnfrz in a couple places, add tfrz_option='constant' which sets Tf to Tocnfrz. (Changes answers in some cases, can also change the value of temp in restart at non-ice gridcells even though the ice state is identical)
  • Modify iDin computation in subroutine compute_microS_mushy
  • Fix fhtan computation in compute_albedos
  • Refactor internal subroutine arguments to leverage module data more
  • Rename orbital interfaces from shr_orb to icepack_orb to more clearly differentiate internal and external versions
  • Update some optional argument handling
  • Clean up Icepack driver namelist logging

Bug fixes

Enhancements

• Generalize the logic for coupling frazil ice. Add namelist cpl_frazil and add update_ocn_f to icepack_parameters. #458
• Add icepack parameter tscale_pnd_drain, sets the timescale (in days) for macroscopic drainage when using mushy thermodynamics. #462
• Update picard_nonconvergence diagnostics #464
• Add readthedocs yaml for documentation building #466
• Remove unncessary call to icepack_recompute_constants in icepack_query_parameters #465
• Port to Perlmutter #467
• Update Derecho inputdata path #471

Documentation

• Update documentation #460, #466, #470