Announce: Atmosphere Working Group

Atmosphere Working Group
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!!Changed date: Atmosphere WG meeting 22.10.2025

→ Please update your calendars with the new meeting link!
Simply click on the relevant calendar link below

Agenda:

  1. Admin: Volunteer for taking today’s meeting minutes to post here on the Forum.

  2. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins)

  3. ACCESS-rAM3 2.0-alpha Release Heidi Nettelbeck (5mins)
    What’s new:
    :plus: Added option to use RAL3.3 (most recent version)
    :plus: Updated UM atmosphere model to version 13.5
    :plus: Removed anomalous rainfall spin-up in GAL9 nest
    Feedback welcome from all interested users; a chance to improve this proposed new release.
    Please make suggestions/ report problems in ACCESS-rAM3 2.0-alpha Feedback forum post by Monday 10th November. A beta release is envisaged in November.

  4. ACCESS Workshop feedback Heidi Nettelbeck (5mins)

  5. Short talk: (10+2mins)

    • An overview of the Sub-Hourly Extreme Precipitation SHEP Flagship Pilot Study for CORDEX Marcus Thatcher
      Many observational studies have found that short duration (hourly and below) precipitation extremes have been increasing in intensity faster than longer duration extremes. In many cases these short duration extremes are increasing much faster than expected based on the Clausius-Clapeyron relationship. The SHEP project uses coordinated, convection permitting, regional climate downscaling experiments to investigate how short duration (hourly to sub-hourly) precipitation extremes have been changing over major Australian and New Zealand cities and how are they projected to change due to global warming. This talk explains the SHEP experiment design, including the event-based study and the pseudo-global warming simulations at convective permitting scales.

  6. Science talk: (15+5mins)

    • Progress in high-resolution ACCESS-AM3 development Shixue Li
      This update will provide an overview of the progress made in running ACCESS-AM3 at high resolution. Shixue will outline the steps taken to configure and test the model, highlight key technical challenges related to model stability, and share both lessons learned and ongoing issues identified through debugging and experimentation.
      The aim is to give a snapshot of the current status of ACCESS-AM3 development and to discuss the next steps toward enabling longer high-resolution integrations.

  7. ACCESS-CM3 development/evaluation Heidi Nettelbeck (5mins)
    Community interest in contributing to CM3 evaluation and development. Here are the planned next steps including a monthly CM3 dev-eval meeting. For more background, see this Hive Forum post and slides for more info.

  8. Compute/storage resources: Heidi Nettelbeck (5mins)
    Any experiment proposals for Q4/2025 (875 kSU allocation)?
    → See here for how to apply for Atmosphere WG Resources.

  9. Next Atmosphere WG meeting: November 2025