ESM working group: Meeting notes 2024

Earth System Working Group
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44

Date: 14/08/2025
Chair: @ShayneM
Participants: 20

1. Admin and resource usage

  • Science Presentations: We currently have no upcoming presentations scheduled. Presentations from recent conferences and workshops are welcome, as are updates on in progress work. Members encouraged contact the ESM WG co-chairs or @spencerwong to propose a topic.

  • LG87 Resource Usage:

    • Our allocation for the July-August quarter is 875 KSUs. @wghuneke @ShayneM are running experiments this quarter.
    • If you have any experiments you are interested in running with ESM WG resources, follow the proposal guidelines here to apply to use WG compute. Members are encouraged to apply for resources early in the quarter, as there may be opportunities to obtain more resources later in the quarter.
    • Storage usage at 62 TB of 100 TB allocation.

2. 2025 ACCESS Community Workshop

  • A brief discussion was held on the format of the ACCESS Community Workshop working group day. It was brought up that having simultaneous working group meetings can lead to people missing out other meetings of interest, especially for ESM WG members who often are involved in multiple working groups. Discussion is ongoing on the format of next year’s workshop to address these issues.

3. CMIP7 development update

@tiloz presented on the latest model developments for ESM1.6.

  • A new spinup simulation “AugustSpinup” has been started, which includes the switch to CICE5 among various technical changes.
  • A current issue is the continued drift in whole of ocean temperature, which began with the transistion to the CMIP7 solar constant. Drift has continued past what was originally expected. Cooling occurs in the deep ocean, and increased deep convection has been noticed in the Weddell Sea. The iceberg melt scheme was discussed as a potential contributor.
  • Approaches to address the drift were brought up, including adjusting the ocean albedo. Concerns with various approaches were raised.
  • It may be beneficial to form a subgroup to continue the discussion on how to best address the model drift.

Please feel free to correct any mistakes in these notes directly, or message @spencerwong with corrections.

Additional information