# CM3 Dev-Eval Working group: Meeting minutes **URL:** https://forum.access-hive.org.au/t/cm3-dev-eval-working-group-meeting-minutes/5393 **Category:** Working Group **Tags:** model-evaluation, access-cm3, access-esm, development **Created:** [13 October 2025 22:15 UTC](https://forum.access-hive.org.au/t/cm3-dev-eval-working-group-meeting-minutes/5393 "2025-10-13T22:15:17Z") **Posts on this page:** 1 **Showing post:** 9
### 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: [28 June 2026 23:04 UTC](https://forum.access-hive.org.au/t/cm3-dev-eval-working-group-meeting-minutes/5393/9 "2026-06-28T23:04:26Z")
#### **CM3 Dev-Eval Working group meeting minutes** Date: **Tuesday 21 July at 10:30 am** Participants: @kieranricardo, @MATTENGLAND, @AndyHoggANU, @cbull, @wghuneke, @ariaan, @dkhutch, @sofarrell, @nicolamaher, @ezhilsabareesh8, @ctychung, @saanvi, @ShayneM, @spencerwong, @ClaireT, @aekiss, @Harun_Rashid Chair: @kieranricardo Minutes: @spencerwong #### **Agenda:** - shout-out props for Figures from: @ezhilsabareesh8 and @kieranricardo - CM3 development updates #### CM3 development updates: - Several bugs were identified around the tripole fold. These included an error in the CICE angles, a problem with the wind stress remapping, and an issue with updating array halos. These have been fixed in the currently running simulations and resolve the excessive sea ice volumes previously seen in the Arctic. - @kieranricardo is working on updating the UM version from 13.0 to 13.8 and swapping to the GC5 central scientific configuration. - Still has a strong radiative imbalance and the SST cold bias is stronger. - Testing out the CICE C grid, which appears to be stable with the tripole fixes and runoff spreading. - Present day and preindustrial test simulations are both currently running and will be available for analysis for the upcoming hackathon. #### **GitHub issue links to OM3 figures for CM3:** - @ezhilsabareesh8 [Total meridional heat transport](https://github.com/ACCESS-Community-Hub/access-cm3-paper-1/issues/78#issuecomment-5022333841) - @ezhilsabareesh8 [Time series of annual mean transport through the Indonesian straits](https://github.com/ACCESS-Community-Hub/access-cm3-paper-1/issues/75#issuecomment-5019235944) - @ezhilsabareesh8 [Zonally integrated overturning](https://github.com/ACCESS-Community-Hub/access-cm3-paper-1/issues/67#issuecomment-5019391743) - @ezhilsabareesh8 [Timeseries of global averages](https://github.com/ACCESS-Community-Hub/access-cm3-paper-1/issues/77#issuecomment-5021846764) - @ezhilsabareesh8 [Hovmoller (depth-time) of horizontally averaged temperature drift](https://github.com/ACCESS-Community-Hub/access-cm3-paper-1/issues/35#issuecomment-5022190146) - @ezhilsabareesh8 [Surface current speed](https://github.com/ACCESS-Community-Hub/access-cm3-paper-1/issues/76#issuecomment-5019846784) **Note on configuration and code used for the CM3 simulation:** - The ocean configuration used in the CM3 simulation matches [this commit](https://github.com/ACCESS-Community-Hub/access-om3-experiments/tree/MC_25km_jra_iaf%2Bwombatlite-test4-d28e0359) in the OM3 configurations repository, though omits the changes from the commits [here](https://github.com/ACCESS-NRI/access-om3-configs/commit/a7042b040bcca4df7c759c6876d4fee9ca0175c5) and [here](https://github.com/ACCESS-NRI/access-om3-configs/commit/fc3dabde9622cbb8fd632a3b5ca8e51bf0a8d5d0). - There are also differences in the model code versions, as shown [in this diff](https://github.com/ACCESS-NRI/ACCESS-OM3/compare/2026.05.002..f5d40a69fd31052448b80b157e37d361118092ff). #### **Community figures** --- _[View the full topic](https://forum.access-hive.org.au/t/cm3-dev-eval-working-group-meeting-minutes/5393)._