CICE-Consortium/CICE: CICE Version 6.2.0

• 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, Andrew Roberts, Matthew Turner, Michael Winton, Stefan Rethmeier
• Format: Software
• Language: English
• Published: 2021
• Subjects: sea ice model; CICE; Icepack; Sea ice
• Online Access: https://zenodo.org/record/4671172; https://doi.org/10.5281/zenodo.4671172

CICE6.2.0 is a major update of CICE6.1.4 from December, 2020. It includes Icepack1.2.5. This release includes updates to the default model initial conditions, updates to the default JRA55 forcing, and an update gx1 ocean mixed layer forcing file. It also includes an update to the time manager and a tool to generate JRA55 forcing data offline. A probabilistic grounding scheme was also added to the landfast ice implementation. Several minor bug fixes were also included and the default emissivity value was changed to 0.985. This implementation should generate the same climate as prior versions in coupled systems. However, the emissivity change should be noted in particular. In addition, there were changes to the time manager that could impact how models are coupled. In particular, the prognostic time manager variables are now myear, mmonth, mday, and msec and the timestep counter is diagnostic. These changes are documented in the user guide, https://cice-consortium-cice.readthedocs.io/en/cice6.2.0/user_guide/ug_implementation.html#time-manager-and-initialization. The standalone model results are different from prior versions due to the new initial condition and forcing even though the climate is similar. Major changes: Update the Time Manager #566, #586 Add probabilistic grounding scheme for landfast ice #565 and update landice tests #586 Update the gx1 initial condition file based on the JRA55 spinup to Jan 1, 2005 and update the gx1prod namelist setup #586 Bug fixes: Fix hmix minimum value #586 Fix halo fill for padded blocks, fix some uninitialized data #579 Fix reading of mixed layer ocean model dataset #578 and update gx1 SOM dataset #586 Use cell-centered ice velocity for high frequency wind stress calculation #576 Proper configuration of zsalinity parameterization #549 Remove unused private variable for OpenMP #561 Correct input slices and time interpolation of JRA forcing for multi-year runs #562 Enhancements: Update 1D EVP kernel #561 Improve maxblocks internal computation and add some additional debugging ...