ESM working group: Meeting notes 2024

Earth System Working Group
, ,
40

Date: 22/5/2025
Chair: @ShayneM
Participants: 13

Agenda Items:

  1. Science Presentations and Scheduling
  2. Shared Access NRI Resources
  3. AAF Authentication
  4. Science Updates: ACCESS-ESM 1.6 and CMIP7

Detailed Summary of Discussions:

  1. Science Presentations and Scheduling

    • Future science presentations are being planned, with Dietmar scheduled for the next meeting in early June.
    • Rachel Law suggested a follow-up session due to the volume of updates.

  2. Shared Access NRI Resources

    • The team has used 820 of 875 KSU for the quarter.
    • Strategy: use resources early to qualify for additional allocations.
    • Some members (e.g., Georgy) may still need more resources.

  3. AAF Authentication

    • Aidan Heerdegen explained the switch to AAF (Australian Access Federation) for easier and more secure logins.
    • Encouraged everyone to enable AAF for better reporting and access continuity.
    • Pointed out the Draft ACCESS-NRI Workplan and encouraged feedback from community.

  4. Science Updates: ACCESS-ESM 1.6 and CMIP7

  • Presented by Rachel Law and Tilo Ziehn:
    • ACCESS-ESM 1.6 is being prepared for the CMIP7 fast track.
    • Focus areas:
      • Model development and infrastructure.
      • New Australian-specific vegetation types (mesic and xeric).
      • Transition to CABLE and CASA-CNP for land biogeochemistry.
      • Ocean biogeochemistry updates using Wombat Lite.
      • Spin-up runs exceeding 1,000 years to ensure model stability.
      • Salinity issues in the Mediterranean due to model configuration.
      • Climate sensitivity estimated at ~3.5°C (lower than ESM 1.5).
  • CICE 5 ocean model integration is progressing well.
  • Land and ocean carbon fluxes are stable and near zero, enabling potential emissions-driven simulations.
  • Vegetation modeling is prescribed but includes productivity feedbacks.
  • Mediterranean salinity is a known issue; potential fixes include adjusting sill depth or mixing parameters.

Decisions Made:

  • Dietmar will present at the next meeting in early June.
  • The team will continue to monitor and manage the use of shared access NRI resources.
  • Members are encouraged to enable AAF authentication for better reporting and access continuity.

Action Items:

  • Rachel Law to schedule a follow-up session for further updates.
  • Team members to consider future resource needs and communicate them.
  • Aidan Heerdegen to provide further guidance on enabling AAF authentication.
  • Continue model development and address the Mediterranean salinity issue.

NOTE: These minutes were generated using AI. Please feel free to correct any mistakes directly, or message @Aidan with corrections.

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