Deprecated Code Features

The following code features are scheduled to be deprecated. They are no longer maintained and will be removed from the code in two stages:

1. disable and remove the associated options from namelist and documentation (Doc) but keeping the functionality internally
2. remove the associated code completely.

These changes will be made in the first release following the dates given below.

If you have concerns about these planned changes, please begin a conversation at the CICE Community Forum.

Deprecated functionality	Namelist removal date	Complete removal date	Namelist flag	Namelist value	Doc	Reason / Comments
upwind advection	1 July 2020	NA	advection	upwind	Doc	- less accurate than the incremental remapping scheme - user request to retain code for idealized experiments
delta-function ITD	TBD	TBD	kitd	0	Doc	- less accurate than linear incremental remapping - on hold pending better understanding of ncat=1
NCAR bulk forcing	1 Sept 2020	NA	atm_data_type	ncar	Doc	updated Consortium tests to JRA-55 deprecated except for gx3 binary forcing tests
COREII forcing	1 Sept 2020	28 Feb 2022	atm_data_type	LYq	Doc	updated Consortium tests to JRA-55 gx1 CORE forcing option deprecated in #643, CICE version 6.3.1 release
restart namelist	1 July 2021	3 Sep 2021	restart	anything	Doc	restart is being set internally depending on runtype and ice_ic - deprecated in #610, CICE version 6.3.0 release
CCSM shortwave	TBD	TBD	shortwave	ccsm3	Doc	based on simple, empirical relationships (from SHEBA); other options have more physically based parameterizations - deprecation postponed indefinitely because several operational centers are still using it
old ridging participation, redistribution	15 July 2022	TBD	krdg_partic krdg_redist	0 0	Doc	can lead to instabilities - deprecation postponed, to be considered during upcoming ridging parameterization development and testing
CESM melt ponds	15 July 2022	1 Sept 2022	tr_pond_cesm	true	Doc	based on simple, empirical relationships (from SHEBA); other options have more physically based parameterizations - deprecated in #787, CICE version 6.4.1 release
0-layer thermodynamics	15 July 2022	1 Sept 2022	ktherm	0	Doc	based on simple, empirical relationships (from SHEBA); other options have more physically based parameterizations - deprecated in #787, CICE version 6.4.1 release
zsalinity	1 Dec 2022	1 Jan 2022	solve_zsal	true	Doc	prognostic salinity scheme for use with BL99 and BGC; use mushy thermo instead - deprecated in #851, CICE version 6.4.2 release
Plans
CPOM / ORCA grid	15 Nov 2024	1 Feb 2025	grid_type orca_halogrid	cpom_grid true	Doc	not used in v6 - See #983
hadgem forcing, DA, driver	15 Nov 2024	1 Feb 2025	ocn_data_type ICE_DA	hadgem_sst hadgem_sst_uvocn	Doc	search repo for 'hadgem'