ACCESS-ESM1.5: Release Information

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ACCESS-ESM1.5

:rocket: Release: 1.2

https://github.com/ACCESS-NRI/access-esm1.5-configs/releases/tag/release-preindustrial%2Bconcentrations-1.2

https://github.com/ACCESS-NRI/access-esm1.5-configs/releases/tag/release-historical%2Bconcentrations-1.2

Getting started

Updates

:white_check_mark: UM code update for controling orbital parameters at runtime #115, #116
:white_check_mark: Include reduced “spinup” diagnostic profiles suitable for long spin-up and paleoclimate simulations #105, #106
:white_check_mark: Include basin mask ocean input file for proper saving of basin specific diagnostics #101, #102
:white_check_mark: Change processor decomposition for better performance #109, #110
:white_check_mark: Fix incorrectly saved atmosphere variable 2,290 TOTAL DOWNWARD PAR FLUX AT SURFACE #107, #108
:white_check_mark: Compress large CICE log files #532
:white_check_mark: Prevent simulations from using incorrect sea ice restarts #539
:white_check_mark: Updated netCDF file names for converted atmosphere output #93
:white_check_mark: CASA-CNP variables are correctly named in the netCDF conversion #157

Notes

  • Orbital parameters can now be set at runtime in the UM namelist files. Instructions on controlling them are available here.
  • The new “spinup” diagnostic profiles produce a reduced amount of model output and are designed for long spin-up simulations. Please see this post for details on the variables saved.
  • Basin specific ocean diagnostics (such as temp_merid_flux_gyre_atlantic) are now correctly saved. Please see this topic for details on the previous issues.
  • Increasing the number of processors allocated to the atmosphere by 48 cores was found to reduce the typical runtime by 10% with a negligible cost in SU usage. Large variations in walltimes were observed due to potential system-wide issues, however under typical circumstances the updated processor decomposition
  • The new configurations use the updated um2nc version 1.1.0 for converting atmosphere outputs to netCDF. The new version produces netCDF filenames containing more information on dates and data frequencies. For example, aiihca.paa1jan and aiihca.pea1jan are now named aiihca.pa-010101_mon.nc and aiihca.pe-010101_dai.nc. This change in behaviour can be disabled by loading the older payu/1.1.5 in the UM_conversion_job.sh job script.

Limitations

:stop_sign: Maximum model run-time of 1 year per queue submission
:stop_sign: Not directly compatible with equivalent CLEX payu configurations

Known Issues

:warning: Ice diagnostics measuring a rate are incorrect
:warning: Occasional extreme sea-ice thickness in isolated grid cells
:warning: The historical forcing configuration does not reproduce CMIP6 r20 due to an error in the ancillaries for that experiment
:warning: Model configurations do not reproduce equivalent CMIP6 simulations, possibly due to differences in model executables. Details on the impacts of this will be documented shortly.

Credits

:star: ACCESS-ESM1.5 was developed by CSIRO (Ziehn T, Chamberlain MA, Law RM, Lenton A, Bodman RW, Dix M, Stevens L, Wang YP, Srbinovsky J, 2020: The Australian Earth System Model: ACCESS-ESM1.5. Journal of Southern Hemisphere Earth Systems Science 70 , 193–214, https://doi.org/10.1071/ES19035)
:star: payu configurations were adapted from work by The Centre of Excellence for Climate Extremes (CLEX)
:star: Model build infrastructure @paulleopardi @harshula @TommyGatti
:star: Configuration development and testing @spencerwong @paulleopardi @MartinDix @anton @minghangli @dougiesquire @Aidan
:star: Related payu development @jo-basevi @spencerwong @anton
:star: Model post-processing @bend @spencerwong @MartinDix @atteggiani
:star: Testing and deployment infrastructure @TommyGatti @jo-basevi @Aidan
:star: Documentation @spencerwong @atteggiani @Aidan @jasmeen_kaur

Support

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Resources

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