These are presented fortnightly at COSIMA meetings . First, some context ACCESS-OM3 is a multi-resolution suite of global ocean-sea ice models under development by ACCESS-NRI and the COSIMA community The successor to ACCESS-OM2, upgrading to MOM6 and CICE6 and updating configuration settings and i…

Name: Andrew Kiss (2026-04-02)
Uploaded: 2026-04-16T00:13:03Z
Description: 2026-04-02 ACCESS-OM3 evaluation update [Andrew Kiss (2026-04-02)]

2026-02-12 Working towards next IAF 25km test configuration and 66-year run Differences so far: Comparing release-MC_25km_jra_iaf..dev-MC_25km_jra_iaf · ACCESS-NRI/access-om3-configs · GitHub Improvements to GM and Redi parameters GM parameters in OM3 · Issue #1100 · ACCESS-NRI/access-om3-configs …

2026-03-05 Continuing work towards next ACCESS-OM3 IAF 25km test configuration and 66-year run: improved Indonesian topography, GM, bottom roughness (see above) WOMBAT-lite BGC SSS restoring is excessive Maps and timeseries of SSS restoring · Issue #44 · ACCESS-Community-Hub/access-om3-paper-1 · Gi…

2026-04-02 ACCESS-OM3 evaluation update [Andrew Kiss (2026-04-02)]

2026-04-16 3rd ACCESS-OM3 25km IAF 1958-2023 test run currently underway; details here currently simulating 2008; should be finished (to end of 2023) by early next week data: /g/data/ol01/outputs/access-om3-25km/MC_25km_jra_iaf+wombatlite-test3v2-00532b88 <a name="p-21755-many-of-the-problems-highlighted-in-the-last-updatehttpsforumaccess-hiveorgautaccess-om3-development-highlights-updates59025-are-now-resolved-or-much-improved-in-the-new-run-3" class="anchor" href="#p-21755-many-of-the-problems-highlighted-in-the-last-updatehttpsforumaccess-hiveorgautaccess-om3-development-highlights-updates59025-are-now-resolved-or-much-improved-in-the-new-run-3" aria-label="Heading link"> many of the problems highlighted in the la…

2026-04-30 3rd ACCESS-OM3 25km IAF 1958-2023 test run 66-year IAF cycle completed includes WOMBAT-lite BGC details here data here: /g/data/ol01/outputs/access-om3-25km/MC_25km_jra_iaf+wombatlite-test3v2-00532b88 we welcome analysis/scrutiny of this data - especially the BGC output Some current ACC…

2026-05-14 Good news :tada: @dougiesquire fixed 5 issues with a 2-character edit to MOM6 NaN introduced in Langmuir number with `WAVE_INTERFACE_ANSWER_DATE > 20230102` · Issue #48 · ACCESS-NRI/MOM6 · GitHub @anton has fixed to conservation of water in the combined MOM6+CICE6 system Water conserva…

2026-05-28 :warning: Bug at boundary in regional OM3 configurations - bug fix being tested: Applying wind stresses at OBC boundaries · Issue #54 · ACCESS-NRI/MOM6 · GitHub New release of ACCESS-OM3 executable imminent investigating vertical mixing of river runoff Runoff redistribution · Issu…

2026-06-11 New 25km 66-year IAF test cycle to start this week MC_25km_jra_iaf+wombatlite-test4 · Issue #1394 · ACCESS-NRI/access-om3-configs · GitHub built with latest codebase (including updated WOMBATlite) iceberg water and latent heat spreading vertical mixing of runoff zero net water flux into…

2026-06-24 New 25km 66-year IAF test cycle underway - nearly 40 years done so far Test run of RYF version of the same 25km configuration also underway New OM3 25km beta release planned after these tests are completed 8km test config under development running, but various crashes Numerical mixing…

2026-07-09 New 25km 66-year IAF test cycle and 31-year test run of RYF version of the same 25km configuration complete; will be move to /g/data/ol01 soon. New OM3 25km beta release imminent 8km test config under development MOM6-CICE6-WW3 100km OM3 configuration progressing towards alpha release (w…

ACCESS-OM3 development highlights/updates

COSIMA Working Group

aekiss (Andrew Kiss) 16 April 2026 00:13 5

2026-04-02

ACCESS-OM3 evaluation update

Topic		Replies	Views
ACCESS-OM3: Release Information ACCESS-NRI Releases release , model , access-om3	3	420	15 July 2026
ACCESS-OM3 model evaluation team minutes Working Group model-evaluation , access-om3	3	263	23 July 2026
COSIMA TWG Meeting Minutes 2025 TWG cosima , meeting , twg , ocean , notes , minutes	26	1184	18 December 2025
COSIMA TWG Meeting Minutes 2024 TWG meeting , twg , notes , minutes	19	1049	4 December 2024
COSIMA TWG Meeting Minutes 2023 TWG meeting , twg , notes , minutes	15	1899	11 December 2023

ACCESS-OM3 development highlights/updates

2026-04-02

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