ESM working group: Meeting notes 2024

Earth System Working Group
, ,
35

Date: 13/2/2025
Participants: 12
Chair: @eunpalim

  1. Opening and welcome:
  • Welcome to 2025’s ESM Working group meetings! Meetings will continue on on the regular fortnightly schedule.
  • There are no speakers confirmed for future meetings. Please consider presenting, or inviting a colleague to present. Members are encouraged to reach out to @spencerwong or any co-chair if they are interested in presenting.
  1. Shared Resources and Experiments:
  • ESM project lg87 has used 460 KSU of its 875 KSU allocation for this quarter. /g/data storage has grown to 54.3TB of the 100TB allocation.
  • Wilma’s experiments are now finished, and there are not yet any other experiment proposals. 425 KSU remain available to use for the rest of the quarter.
  • Do you have any proposals for shared experiments? See guidelines for how to do this. There are often used resources we can access if there are projects to use them.
  • @spencerwong to look into adding a spreadsheet to track active experiments and resources.
  1. Science Presentation:
  • Shayne McGregor presented on Understanding multi-model ensemble projected warming pattern variability

  • Background:

    • Spatial pattern of warming known to influence projections, from radiative feedbacks to ENSO teleconnections and monsoon projections. CMIP5 and CMIP6 models display different relationships between climate and warming patterns.
    • A discrepancy exists between modelled “El-Nino” like pattern and observed cooling in the Western Central Equatorial Pacific.

  • This work:

    • This work focuses on the models, investigating the variability in the warming patterns they produce and the factors that control this variability.
    • EOF analysis across models in the CMIP6 scenarios revealed two main patterns in the Pacific basin: EOF1, a hemispheric gradient and EOF2, which is similar to El-Nino like pattern and related to the zonal SST gradient. Together, they explain 70% of variability in the patterns across models.
    • Relationships were found between warming patterns and projected global mean temperature, and EOF 2 was found to have a stronger relationship to the model mean states.
    • Focusing on regions in the NH tropical Western Pacific and SH tropical Eastern Pacific, models which better matched observations produced more El-Nino patterns in their projections, creating new questions about the discrepancy between observed and modelled patterns.

Video recording to be uploaded shortly
4. ESM1.5 minor release:

  • Version 1.2 of the ESM1.5 configurations are now available. Changes include:
    • Runtime orbital parameters
    • Added spin-up diagnostic profiles
    • Fixed basin specific ocean diagnostics
    • Improved performance via new processor decomposition
    • Compression of large CICE log files
    • Guards against inconsistent CICE calanders
    • Updated atmosphere netCDF file names
  • Full release notes are available here.

Additional information