Published December 9, 2025 | Version 2.0.9
Software Open

NorESM2 source code as used for CMIP6 simulations (includes additional experimental setups, extended model documentation, corrections in atmosphere diagnostics, additional capabilities in BLOM/iHAMOCC, and technical modifications)

  • 1. Norwegian Meteorological Institute, Oslo, Norway
  • 2. Norwegian Reserach Centre and Bjerknes Centre for Climate Research, Bergen, Norway
  • 3. Norwegian Meteorological Institure, Oslo, Norway
  • 4. Norwegian Reserach Centre and Bjerknes Centre for Climate Research, Bergen, Norway and Stockholm University, Department of Meteorology, Stockholm, Sweden
  • 5. Nansen Environmental and Remote Sensing Center, Bergen, Norway
  • 6. University of Oslo, Department of Geosciences, Oslo, Norway
  • 7. Geophysical Institute, University in Bergen, and Bjerknes Centre for Climate Research, Bergen, Norway
  • 8. Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway
  • 9. Institute of Marine Research, Bergen, Norway
  • 10. Eurasia Institute of Earth Sciences, Istanbul Technical University, Istanbul, Turkey and Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway
  • 11. University of Bergen, Bergen, Norway
  • 12. Norwegian Meteorological Institute, Oslo, Norway and University of Oslo, Department of Geosciences, Oslo, Norway
  • 13. EDMO icon Norwegian Meteorological Institute

Description

Extract from NorESM2 github code repository, corresponding to model version used for CMIP6 simulations, and consistent with description and simulations as described in Seland et al. [2020, GMD] ( https://doi.org/10.5194/gmd-2019-378) and Tjiputra et al. [2020, GMD] (https://doi.org/10.5194/gmd-2019-347).

Compared to the former upload (version 2.0.2) this upload contains (incomplete list) : (1) additional experimental setups used in CMIP6 (SSP5-3.4 and CO2 emission-driven SSP compsets); (2) extended model documentation; (3) modifications to run on different HPCs, better queue management, modifications in archiving scripts, automatic copying of case-directory; (4) correction in CCN and COSP diagnostics, and automatic download of aerosol AeroTab files; (5) code cleanup with removal of unused files; (6) modifications in the BLOM/iHAMOCC source code structure; and (7) additional capabilities in BLOM (support for tripolar 1/8 degree grid, possibility for hybrid vertical coordinates).

The code is also available via the github repository https://github.com/NorESMhub/NorESM in the noresm2 branch.  The upload here is based on the tag release-noresm2.0.9.

Post-publication notes will be kept at https://github.com/NorESMhub/NorESM (information on intermeidate releases can be found at https://github.com/NorESMhub/NorESM/releases).

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Additional details

Related works

Is documented by
Journal article: 10.5194/gmd-2019-378 (DOI)
Journal article: 10.5194/gmd-2019-347 (DOI)

Software

References

  • Seland et al. (2020, GMD) : Overview of the Norwegian Earth System Model, NorESM2, and key climate response of CMIP6 DECK, historical, and scenario simulations
  • Tjiputra et al. (2020, GMD) : Ocean biogeochemistry in the Norwegian Earth System Model version 2 (NorESM2)