• Duvivier, Alice
• Dupont, Frederic
• Craig, Anthony
• Bailey, David A.
• Rasmussen, Till
• Allard, Richard
• Osinski, Robert
• Lemieux, Jean-Francois
• Hunke, Elizabeth
• Jeffery, Nicole
• Roberts, Andrew
• Roy, Francois
• Holland, Marika
• Grumbine, Robert
• Hebert, David
• Blain, Philippe
• Turner, Matthew
• Ribergaard, Mads
• Worthen, Denise

Abstract

CICE version 6.0.0 is released with Icepack version 1.1.0. Icepack contains the column physics within CICE, first released as an independent software package in February 2018. Because the code refactoring associated with Icepack introduced significant differences with the previous CICE release (v5.1.2), we created an "alpha" version of CICE v6 in March 2018 while enhancements for the full v6 release were completed. Since the v6.0.0.alpha release, we updated Icepack to version 1.1.0, implemented dynamic allocation for most arrays, enhanced all rheology options (EVP, rEVP, EAP), simplified the initialization procedure for tracers, added support for CMIP6 history output, improved the quality control and compliance tests, added new test configurations to the test suites, and automated basic testing using Travis CI. This release also includes many other improvements since version 5.1.2, most notably a new landfast-ice parameterization with tensile strength, and full vertical biogeochemistry with shortwave feedback on sea ice physics. The source code and forcing data directories have been restructured to allow extensions for other sea ice model components, and we implemented a flexible, extensible, robust interface between Icepack and the sea ice model driver. The code, scripts, development procedures and tasks/issues are documented online, and automated test reporting is available. Major changes:Update icepack #163 #188 #223 #250 #262 Add CMIP6 support #191 #195 Add dynamic allocation #194 Move tracer pre-processing information to namelist #196 Add tripole grid and test #201 Add bathymetry files for testing landfast ice #222 Revise rEVP #229 #226 Refactor tracer initialization to take advantage of dynamic allocation #235 Set EVP subcycling ndte=240 (increased from 120) #250Enhancements:Travis CI #111 Enhance machine support #120 #125 #153 #220 #261 Add queue information to scripts #143 #147 Add version number in netcdf output #121 Increase test coverage #129 Implement box model tests #151 #254 Support coupling in RASM #152 #253 Rename some variables and subroutines #158 Test the QC testing process #167 Add subname to each routine, for diagnostics #173 Move emissivity into namelist #176 Clean up dummy and unused variables #180 Add output variables for vector speed/direction quantities (ice, atm, ocn) #199 Compare log files in addition to restart files for regression tests #202 Change namelist flags, settings for consistency with Icepack #208 Clarify test output #209 Enhance scripts #215 Move k1 to namelist #220 Add HYCOM forcing for DMI #230 Consolidate BGC namelist flags and clean up initialization #240 Improve EAP efficiency #257 Update documentationBug fixes:Handle effective sample size > 30 in QC script #108 Comment out non-thread-safe threading #111 Fix QC false failures and update per Roberts et al 2018 #145 #161 Broadcast calendar fields #146 Fix binary restarts #148 Mask restoring variables by land #149 Fix failing tests #163 Fix units for trsig in history output #198 Correct parameter k1 for basal grounding scheme #206 Debug zbgc #207 Fix threading problem for dfresh, dfsalt #228 Fix array-out-of-bounds in EAP #257

Topics

• impedance spectroscopy
• strength
• tensile strength
• chemical ionisation