ACCESS-NRI COSIMA 2025 Training Program
The final session is on this FRIDAY!
Session 7: Perturbation Experiments in ACCESS-OM2 / Multiple Sensitivity Tests using Experiment Generator & Runner
Presenters: Minghang Li @minghangli , Andrew Kiss @aekiss
When: 11am, 29 August 2025 (Friday)
Where: Zoom
Description: Modern ocean and climate models like ACCESS-OM2 rely on large, complex forcing datasets (e.g. JRA55-do) to drive simulations. But what if you want to test how sensitive your model is to stronger winds, altered heat fluxes, or reduced storms? Or investigate how uncertain forcing data might affect your results?
This training session introduces perturbation experiments and shows how to create/run them using the ACCESS Experiment Generator and ACCESS Experiment Runner tools. The training will cover:
-
Why perturbation experiments matter for understanding model sensitivity and robustness.
-
How to set up forcing perturbations in
forcing.json: forcing_perturbation.pdf (307.3 KB) -
How to configure and automate multi-run sensitivity tests with the
Experiment GeneratorandExperiment Runner.
By the end of the session, you’ll learn how the ACCESS Experiment Generator and ACCESS Experiment Runner tools make it easy to design and execute multiple sensitivity tests.
Prerequisites
- Users who have access to
Gadiand are members of thevk83project can load thePayudevelopment environment using,module use /g/data/vk83/prerelease/modules && module load payu/dev
Relevant links:
- Notes from presentation
- https://github.com/ACCESS-NRI/access-experiment-generator
- https://github.com/ACCESS-NRI/access-experiment-runner
- https://github.com/COSIMA/access-om2/wiki/Tutorials#Scaling-the-forcing-fields:~:text=Scaling%20the%20forcing%20fields
Interested in full program schedule - Click here for the full program.
If you have any questions, feel free to get in touch with jasmeen.kaur@anu.edu.au and Chris.Bull@anu.edu.au, or ask on the forum.