ACCESS-CM3 Experiments

The below lists key experiments that are being used to improve, evaluate and drive development for CM3. We welcome scientific and technical feedback on these runs. If you would like to get involved in evaluation of these runs, see instructions here and an overview here.

The below data is from unreleased configurations, and there is no guarantee that it will be available or re-producible long-term. Note that all experiments use constant forcing and that year numbers are essentially meaningless.

This data, and the configurations they are based on, are licensed by CC-by-4.0 and therefore can be freely shared, distributed and modified. Users of ACCESS-NRI models, data, tools or expert support are required to clearly include an acknowledgement in all publications/reports/public releases.

Experiment	Base Configuration	Date completed	Description	Model build	Length (years)	ESM Datastore (output path)
			CM3 present day control run. Ocean initial conditions are taken from a "cold start" in ACCESS-OM3 (e.g., WOA2023 January).	NA	50	/g/data/zv30/non-cmip/ACCESS-CM3/cm3-run-11-08-2025-25km-beta-om3-new-um-params/cm3-demo-datastore/cm3-demo-datastore.json
	access-cm3-config	17/03/2026	CM3 present day control run. Ocean initial conditions are taken from a "cold start" in ACCESS-OM3 (e.g., WOA2023 January). This run features updated OM3 components, pseudo-iceberg fluxes, and a more accurate wind stress remapping.	UM OM3	100	/g/data/zv30/non-cmip/ACCESS-CM3/cm3-run-20-01-2026-om3-update/cm3-datastore/cm3-datastore.json

ACCESS-CM2 Experiments

The below list are key CM2 experiments that are being used to improve, evaluate and drive development for CM3. When evaluating CM3 we encourage comparisons between CM2 and CM3.

Experiment	Base Configuration	Date completed	Description	Model build	Length (years)	ESM Datastore (output path)
			CM2 25km present day control run for comparison. We recommend comparing the first N years of this run to ACCESS-CM3 runs to assess the spin-up.			/g/data/lg87/wgh581/cz861/