Session 6: Breakout room 3: Model Configurations/ development - ACCESS-CM3/ESM3

[aekiss (Andrew Kiss)]

RH: can we spin up component-wise to speed it up eg spin up ocean separately

Decoupling the ACCESS ESM for long spin-up

We are planning to run some glacial experiments with the ACCESS ESM. Since the boundary conditions are quite different from pre-industrial/interglacial conditions, we will need to run the model for more than 2000 years. We were thus wondering if there were some ways the spin-up could be “accelerated”? ie the atmospheric model is the slow and heavy part of the ACCESS-ESM but it is the ocean that takes a long time to equilibrate. Would there be a way to increase the length of the atm. time step o…