Scheduled Downtime
On Tuesday 24 October 2023 @ 5pm MT the forums will be in read only mode in preparation for the downtime. On Wednesday 25 October 2023 @ 5am MT, this website will be down for maintenance and expected to return online later in the morning.
Normal Operations
The forums are back online with normal operations. If you notice any issues or errors related to the forums, please reach out to

Alternative Earths

This forum was created after the closing discussion at the Alternative Earths session during the 2021 CESM Workshop. You can view the live replay on YouTube:

* Note this forum is currently only for discussion, no staff support will be provided