# ACCESS-ESM1.6 development

**URL:** <https://forum.access-hive.org.au/t/access-esm1-6-development/3114>\
**Category:** CMIP7 development\
**Tags:** esm16-dev-mailing\
**Created:** [29 August 2024 03:27 UTC](https://forum.access-hive.org.au/t/access-esm1-6-development/3114 "2024-08-29T03:27:54Z")\
**Posts on this page:** 1\
**Showing post:** 155

<div class="post-metadata">

**Author:** ![spencerwong](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/spencerwong/32/1894_2.png) [@spencerwong](https://forum.access-hive.org.au/u/spencerwong)\
**Post date:** [9 April 2025 22:16 UTC](https://forum.access-hive.org.au/t/access-esm1-6-development/3114/155 "2025-04-09T22:16:22Z")

</div>

Hi everyone, the updates for the next spinup configuration are now complete and have been added to the [ESM1.6 configurations repository](https://github.com/ACCESS-NRI/access-esm1.6-configs).

### Cloning the configuration

We’ve added a tag to the repository, `20250409-spinup-dev-preindustrial+concentrations`, which points to the new spinup configuration. Using a tag lets us “freeze” the spinup configuration, allowing development to continue on the `dev-preindustrial+concentrations` without affecting the spinup configuration.

Note that the payu command for cloning a configuration based on a tag is slightly different to the command for cloning from a branch. To clone the spinup configuration from the new tag, use:

```auto
payu clone https://github.com/ACCESS-NRI/access-esm1.6-configs -s 20250409-spinup-dev-preindustrial+concentrations -b <new-branch-name> <new-directory-name>

```

Here, it’s worth using a descriptive branch name for `<new-branch-name>`, e.g. `20250410-spinup`.

### Configuration details

Details on the changes are available in [this issue](https://github.com/ACCESS-NRI/access-esm1.6-configs/issues/85#issue-2971149548), but to summarise:

- Use the CMIP7 solar constant.
- Update the WOMBAT-lite parameters to more recent ones used by @pearseb.
- Use the Sapphire Rapids nodes.
- Use an ocean restart from late in @pearseb’s previous spinup, and an atmosphere/land restart from year 30 of @Jhan’s MarchEpot simulation.
- Use the latest WOMBAT-lite and UM7 code.

Many thanks to @dougiesquire, @pearseb, @manodeep, and @MartinDix for their work on these configuration changes.

---

_[View the full topic](https://forum.access-hive.org.au/t/access-esm1-6-development/3114)._