Experiment title 
: Pacific pacemaker experiments
Summary :
Using ACCESS-CM2 PI-CTR experiments as control for perturbation experiment to investigate the sensitivity of the variability of different ENSO types under warming/cooling future pattern.
ACCESS-CM2 PI-CTR provides a stable control baseline. Pacemaker perturbations impose two future SST patterns, allowing direct attribution of ENSO changes to mean-state pattern effects. Four ENSO types are examined to assess differential sensitivity, and a 10-member ensemble quantifies internal variability and statistical robustness. Consistent initialization ensures comparability across experiments while keeping computational cost tractable.
Scientific motivation:
Projected changes in ENSO remain highly uncertain, particularly regarding shifts in ENSO diversity (e.g., Eastern vs Central Pacific events). These changes are thought to depend strongly on the spatial pattern of background warming/cooling and associated modifications to tropical Pacific mean state and air–sea coupling. This project uses Pacific pacemaker experiments to isolate how distinct future SST patterns influence the variability and characteristics of different ENSO types, improving understanding of pattern-dependent ENSO responses and reducing uncertainty in future projections.
Experiment Name : Pacific pacemaker experiments
People : Huazhen Li, Andrea Taschetto
Model: ACCESS-CM2
Configuration: https://research.csiro.au/access/about/cm2/
Initial conditions: restart from year 970: /g/data/e14/hl1052/Project_3/cm000/restart
Run plan: 10-member ensemble x 2 model years x 4 ENSO types x 2 future patterns
Simulation details: Using ACCESS-CM2 to run 2 model years under different focing initial conditions
Total KSUs required : 10 x 2 x 4 x 2 x 6 KSU/yr = 960KSU
Total storage required : 10 x 2 years @ 12Gb/year = 960GB
Storage lifetime : 6 months
Long term data plan : TBC
Outputs:
Restarts:
Related articles:
Analysis:
Conclusion: