CICE-Consortium/CICE: CICE Version 6.4.1

• Main Authors: Elizabeth Hunke, Richard Allard, David A. Bailey, Philippe Blain, Anthony Craig, Frederic Dupont, Alice DuVivier, Robert Grumbine, David Hebert, Marika Holland, Nicole Jeffery, Jean-Francois Lemieux, Robert Osinski, Till Rasmussen, Mads Ribergaard, Lettie Roach, Andrew Roberts, Matthew Turner, Michael Winton, Denise Worthen
• Format: Software
• Language: English
• Published: 2022
• Subjects: sea ice model; CICE; Icepack; Sea ice
• Online Access: https://zenodo.org/record/7419531; https://doi.org/10.5281/zenodo.7419531

CICE6.4.1 updates CICE6.4.0 from August, 2022 and includes Icepack1.3.3. This release provides several minor upgrades to the recently released C-grid option. It has several bug fixes including in dEdd scheme affecting modal aerosols and the snow grain implementation. It has updated the VP dynamics option to improve robustness and reproducibility. It moved the evp dynamics deformation calculation to the end of the subcycling loop. It adds new features such as the saltflux_option. Testing and scripts have been updated including addition of a new variable spacing rectangular box option. This version deprecates the zsalinity option. Please contact the CICE Consortium with any concerns regarding deprecated code. We will consider keeping it. Important NOTES The C-grid implementation is available. However validation is ongoing. Some noise is generated in the solution when incremental remapping advection is used with the C-grid. One solution seems to be to use the upwind advection scheme instead which is more diffusive. The Consortium would appreciate any feedback from the community as users test the C-grid in their applications both with respect to results and possible improvements. The cicecore/cicedynB directory was renamed to cicecore/cicedyn. A symlink was added to continue to support use of CICE in applications where the source code paths (including cicecore/cicedynB) are hardwired for compilation or other reasons. This symlink will be removed in the near-future. Applications are encouraged to update their scripts and start using cicedyn instead. Bug fixes Update Icepack, with specific updates for dEdd. Fix several bugs including missing g/w0/tau calculation after "aerosol in snow" and computation of modal aerosol taer/waer/gaer which was not multiplying by nilyr and nslyr properly. Refactor computation of g/w0/tau, get rid of use of puny. Change some constants in dEdd to double precision. Update aerosol tables to double precision in CICE. THIS CHANGES ANSWERS for tr_aero and modal aerosols and could change ...