# \#access-om2 **URL:** https://forum.access-hive.org.au/tag/access-om2/65.md [Latest](https://forum.access-hive.org.au/latest.md) · [Categories](https://forum.access-hive.org.au/categories.md) · [Tags](https://forum.access-hive.org.au/tags.md) --- ## [ACCESS-OM2: Release Information](https://forum.access-hive.org.au/t/access-om2-release-information/1602)
**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\ **Replies:** 5\ **Last updated:** [24 September 2026 06:06 UTC](https://forum.access-hive.org.au/t/access-om2-release-information/1602 "2026-09-24T06:06:56Z")
ACCESS-OM2 ACCESS-OM2 is a global coupled Ocean-Sea Ice Model developed by COSIMA. ACCESS-NRI Support ACCESS-NRI has assumed responsibility for supporting ACCESS-OM2 for the Australian Research Community. As part of thi… --- ## [Intake loading aice\_m as two separate datasets](https://forum.access-hive.org.au/t/intake-loading-aice-m-as-two-separate-datasets/6586)
**Author:** [@hrsdawson](https://forum.access-hive.org.au/u/hrsdawson)\ **Replies:** 1\ **Last updated:** [3 July 2026 00:42 UTC](https://forum.access-hive.org.au/t/intake-loading-aice-m-as-two-separate-datasets/6586 "2026-07-03T00:42:51Z")
I’m trying to load the variable aice\_m from the 01deg\_jra55v140\_iaf\_cycle4experiment using intake, but intake is returning two separate datasets for this one diagnostic. This is the code I’m using to read the data: dict… --- ## [Diagnostics for new ACCESS-OM2+WOMBATlite control experiments](https://forum.access-hive.org.au/t/diagnostics-for-new-access-om2-wombatlite-control-experiments/6582)
**Author:** [@dougiesquire](https://forum.access-hive.org.au/u/dougiesquire)\ **Replies:** 0\ **Last updated:** [1 July 2026 23:42 UTC](https://forum.access-hive.org.au/t/diagnostics-for-new-access-om2-wombatlite-control-experiments/6582 "2026-07-01T23:42:25Z")
ACCESS-NRI plan to run a set of control experiments using the recently released ACCESS-OM2 configurations that include the WOMBATlite biogeochemistry model. The current plan is to run, as a minimum, IAF experiments at 1… --- ## [Easy forcing perturbation experiments in ACCESS-OM2 + Tutorial](https://forum.access-hive.org.au/t/easy-forcing-perturbation-experiments-in-access-om2-tutorial/4356)
**Author:** [@rmholmes](https://forum.access-hive.org.au/u/rmholmes)\ **Replies:** 3\ **Last updated:** [29 May 2026 06:07 UTC](https://forum.access-hive.org.au/t/easy-forcing-perturbation-experiments-in-access-om2-tutorial/4356 "2026-05-29T06:07:23Z")
I’m not sure how many people are aware that there is a system in ACCESS-OM2 (actually in YATM) to easily setup forcing perturbation experiments where the atmospheric forcing fields are modified. If you like running exper… --- ## [ACCESS-om2\_01 jra55v140\_iaf\_cycle4\_jra55v150\_extension](https://forum.access-hive.org.au/t/access-om2-01-jra55v140-iaf-cycle4-jra55v150-extension/6381)
**Author:** [@Valentina\_Nunez\_Espi](https://forum.access-hive.org.au/u/Valentina_Nunez_Espi)\ **Replies:** 3\ **Last updated:** [6 May 2026 07:59 UTC](https://forum.access-hive.org.au/t/access-om2-01-jra55v140-iaf-cycle4-jra55v150-extension/6381 "2026-05-06T07:59:07Z")
Hi everyone, I was wondering whether daily output data from the ACCESS-OM2-01 JRA55V140\_IAF\_Cycle4\_JRA55V150\_extension experiment are available through any project or archive. Thanks in advance --- ## [Building ACCESS-OM2 on Archer2 (UK HPC)](https://forum.access-hive.org.au/t/building-access-om2-on-archer2-uk-hpc/5872)
**Author:** [@davemunday](https://forum.access-hive.org.au/u/davemunday)\ **Replies:** 54\ **Last updated:** [13 March 2026 01:27 UTC](https://forum.access-hive.org.au/t/building-access-om2-on-archer2-uk-hpc/5872 "2026-03-13T01:27:46Z")
Hi all, I’ve just started trying to build ACCESS-OM2 on Archer2, the UK’s HPC platform, for a new project. I’ve found the forum phenomenally useful, although I’ve still managed to get myself stuck. Any help would be muc… --- ## [Installing ACCESS-OM2 on NeSI (New Zealand supercomputer)](https://forum.access-hive.org.au/t/installing-access-om2-on-nesi-new-zealand-supercomputer/5566)
**Author:** [@dkhutch](https://forum.access-hive.org.au/u/dkhutch)\ **Replies:** 54\ **Last updated:** [2 March 2026 04:59 UTC](https://forum.access-hive.org.au/t/installing-access-om2-on-nesi-new-zealand-supercomputer/5566 "2026-03-02T04:59:56Z")
Hi COSIMA team, I am an investigator on a recently awarded Marsden Fund grant, led by Shaun Eaves at Victoria University of Wellington. In the grant we propose to use ACCESS-OM2-025 as part of our experiment plan. We a… --- ## [Payu collate not working from "out-of-the-box" access-om2 config](https://forum.access-hive.org.au/t/payu-collate-not-working-from-out-of-the-box-access-om2-config/5752)
**Author:** [@pearseb](https://forum.access-hive.org.au/u/pearseb)\ **Replies:** 3\ **Last updated:** [7 January 2026 23:17 UTC](https://forum.access-hive.org.au/t/payu-collate-not-working-from-out-of-the-box-access-om2-config/5752 "2026-01-07T23:17:17Z")
Hi all, I’ve been running an ACCESS-OM2-WOMBATlite simulation, which i cloned from GitHub - ACCESS-NRI/access-om2-configs at dev-1deg\_jra55\_ryf+wombatlite The model runs fine, but the collation step does not. When I at… --- ## [How to build ACCESS-OM2 on NeSI HPC](https://forum.access-hive.org.au/t/how-to-build-access-om2-on-nesi-hpc/5623)
**Author:** [@harshula](https://forum.access-hive.org.au/u/harshula)\ **Replies:** 0\ **Last updated:** [28 November 2025 13:55 UTC](https://forum.access-hive.org.au/t/how-to-build-access-om2-on-nesi-hpc/5623 "2025-11-28T13:55:48Z")
How to build ACCESS-OM2 on NeSI HPC (v2) \[18/12/2025: Add instructions on how to use the oneapi compiler\] Ensure that the initial setup requirements have been completed: Set up Spack for building ACCESS models on NeSI… --- ## [How to build ACCESS-OM2 on Setonix](https://forum.access-hive.org.au/t/how-to-build-access-om2-on-setonix/5524)
**Author:** [@harshula](https://forum.access-hive.org.au/u/harshula)\ **Replies:** 0\ **Last updated:** [14 November 2025 01:55 UTC](https://forum.access-hive.org.au/t/how-to-build-access-om2-on-setonix/5524 "2025-11-14T01:55:35Z")
How to build ACCESS-OM2 on Setonix (v2) \[18/11/2025: Refer to How to set up access-spack-packages on Setonix to build ACCESS models\] Ensure that the initial setup requirements have been completed: How to set up acces… --- ## [Forcing ACCESS-OM2 using ESM1.5 data](https://forum.access-hive.org.au/t/forcing-access-om2-using-esm1-5-data/4349)
**Author:** [@ongqingyee](https://forum.access-hive.org.au/u/ongqingyee)\ **Replies:** 81\ **Last updated:** [11 November 2025 05:20 UTC](https://forum.access-hive.org.au/t/forcing-access-om2-using-esm1-5-data/4349 "2025-11-11T05:20:24Z")
Hi everyone, I am looking to run ACCESS-OM2 at 1deg resolution using surface forcings from ESM1.5 future projection runs (SSP585). I have been able to obtain 3 hourly atmospheric data from @tiloz (thank you!) and want t… --- ## [Cannot find mppncombine after compiling ACCESS-OM2-wombatlite](https://forum.access-hive.org.au/t/cannot-find-mppncombine-after-compiling-access-om2-wombatlite/5477)
**Author:** [@raslekar](https://forum.access-hive.org.au/u/raslekar)\ **Replies:** 9\ **Last updated:** [7 November 2025 04:28 UTC](https://forum.access-hive.org.au/t/cannot-find-mppncombine-after-compiling-access-om2-wombatlite/5477 "2025-11-07T04:28:43Z")
Description of request: Environment: NCI-Gadi 1) singularity 2) payu/1.1.7(default) Spack Environment as follows: pack: add package specs to the specs list specs: access-om2@git.2024.03.0=latest packages: c… --- ## [Poisson solvers suited to access-om2 output?](https://forum.access-hive.org.au/t/poisson-solvers-suited-to-access-om2-output/5340)
**Author:** [@SWatson](https://forum.access-hive.org.au/u/SWatson)\ **Replies:** 5\ **Last updated:** [1 October 2025 21:58 UTC](https://forum.access-hive.org.au/t/poisson-solvers-suited-to-access-om2-output/5340 "2025-10-01T21:58:04Z")
Hi, I’m just reaching out to see if anyone has had good experiences with particular solvers when working with om2 output. Specifically, I need to solve a 2d poisson equation for the scalar potential of a vector field w… --- ## [Help needed for CMORising some ACCESS-OM2 output](https://forum.access-hive.org.au/t/help-needed-for-cmorising-some-access-om2-output/5179)
**Author:** [@Benoit](https://forum.access-hive.org.au/u/Benoit)\ **Replies:** 3\ **Last updated:** [18 September 2025 04:52 UTC](https://forum.access-hive.org.au/t/help-needed-for-cmorising-some-access-om2-output/5179 "2025-09-18T04:52:06Z")
I’ve been building transport matrices from ACCESS-ESM1.5 CMIP6 output, and I’d like to use the same code to do the same but from ACCESS-OM2. For this I’d like the ACCESS-OM2 output to be in the same format as what can be… --- ## [ACCESS-OM2 payu tutorial](https://forum.access-hive.org.au/t/access-om2-payu-tutorial/1750)
**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\ **Replies:** 0\ **Last updated:** [24 January 2024 11:58 UTC](https://forum.access-hive.org.au/t/access-om2-payu-tutorial/1750 "2024-01-24T11:58:44Z")
Introduction This is a tutorial to introduce new users to payu, and explain new features of payu to experienced users, particularly how those changes might affect their existing workflow. payu is a scientific workflow … --- ## [Daily Heat Budget Diagnostics](https://forum.access-hive.org.au/t/daily-heat-budget-diagnostics/4674)
**Author:** [@tom\_schmaltz](https://forum.access-hive.org.au/u/tom_schmaltz)\ **Replies:** 14\ **Last updated:** [16 July 2025 05:29 UTC](https://forum.access-hive.org.au/t/daily-heat-budget-diagnostics/4674 "2025-07-16T05:29:09Z")
Hi all! I was just wondering if anyone is aware of any existing quarter (or tenth degree) ocean-sea ice models that have computed (online) heat budget diagnostics (advective, surface (swflx, lw\_heat, etc.), mixing terms… --- ## [Access-om2 ksu benchmarks](https://forum.access-hive.org.au/t/access-om2-ksu-benchmarks/4577)
**Author:** [@dkhutch](https://forum.access-hive.org.au/u/dkhutch)\ **Replies:** 2\ **Last updated:** [4 June 2025 10:10 UTC](https://forum.access-hive.org.au/t/access-om2-ksu-benchmarks/4577 "2025-06-04T10:10:26Z")
Hi, I was wondering if someone could please point me to the computational cost benchmarks for: ACCESS-OM2-025 ACCESS-OM2-01 I.e. How many KSU for 1 month simulation (or other standard period) in each case, and how ma… --- ## [Can't access files in 01deg\_jra55v13\_ryf9091 simulation](https://forum.access-hive.org.au/t/cant-access-files-in-01deg-jra55v13-ryf9091-simulation/4541)
**Author:** [@sb4233](https://forum.access-hive.org.au/u/sb4233)\ **Replies:** 41\ **Last updated:** [29 May 2025 01:47 UTC](https://forum.access-hive.org.au/t/cant-access-files-in-01deg-jra55v13-ryf9091-simulation/4541 "2025-05-29T01:47:57Z")
Hi, I am not able to access outputs from the run 01deg\_jra55v13\_ryf9091 - ds = process\_dataset(cc.querying.getvar('01deg\_jra55v13\_ryf9091', 'dzt' , session, frequency='1 monthly'), 'xt\_ocean') PermissionError: \[Errno… --- ## [How to run ACCESS-OM2-RYF from an existing control run?](https://forum.access-hive.org.au/t/how-to-run-access-om2-ryf-from-an-existing-control-run/4437)
**Author:** [@sb4233](https://forum.access-hive.org.au/u/sb4233)\ **Replies:** 25\ **Last updated:** [19 May 2025 11:42 UTC](https://forum.access-hive.org.au/t/how-to-run-access-om2-ryf-from-an-existing-control-run/4437 "2025-05-19T11:42:11Z")
Hi, I want to run ACCESS-OM2-RYF9091 forced by jra55v1.3 (GitHub - COSIMA/01deg\_jra55\_ryf at ryf9091-on-gadi) from an existing control run. The base documentation that I followed is -run-access-om. I understand that th… --- ## [21st March 2025 - How to run an ACCESS-OM2 or OM3 model](https://forum.access-hive.org.au/t/21st-march-2025-how-to-run-an-access-om2-or-om3-model/4254)
**Author:** [@cbull](https://forum.access-hive.org.au/u/cbull)\ **Replies:** 4\ **Last updated:** [24 March 2025 06:45 UTC](https://forum.access-hive.org.au/t/21st-march-2025-how-to-run-an-access-om2-or-om3-model/4254 "2025-03-24T06:45:39Z")
When? 11am Friday 21st March 2025, here. Please give feedback on this session here What is this? A tutorial on how to run the ACCESS-OM2 model for the first time (from rest, a restart or a perturbation!). Writing cre… --- ## [Calculating heat advection terms](https://forum.access-hive.org.au/t/calculating-heat-advection-terms/4075)
**Author:** [@sb4233](https://forum.access-hive.org.au/u/sb4233)\ **Replies:** 10\ **Last updated:** [21 January 2025 23:32 UTC](https://forum.access-hive.org.au/t/calculating-heat-advection-terms/4075 "2025-01-21T23:32:17Z")
Hi all, I am trying to calculate heat budget for a fixed volume using ACCESS-OM2-01 (JRA-dov1.4). From ACCESS I got temp\_xflux\_adv and temp\_yflux\_adv but I couldn’t find temp\_zflux\_adv in the output. So, I am trying to … --- ## [Automatic resubmission of simulation with payu](https://forum.access-hive.org.au/t/automatic-resubmission-of-simulation-with-payu/3921)
**Author:** [@pearseb](https://forum.access-hive.org.au/u/pearseb)\ **Replies:** 1\ **Last updated:** [21 November 2024 05:38 UTC](https://forum.access-hive.org.au/t/automatic-resubmission-of-simulation-with-payu/3921 "2024-11-21T05:38:01Z")
Hi everyone, Is an automatic resubmission of a simulation using payu as easy as placing: run: payu sweep; payu setup; payu run -f In your userscripts option within the config.yaml file? Something like this? userscri… --- ## [Running ACCESS-OM2 on Leonardo supercomputer](https://forum.access-hive.org.au/t/running-access-om2-on-leonardo-supercomputer/1804)
**Author:** [@Natalia](https://forum.access-hive.org.au/u/Natalia)\ **Replies:** 40\ **Last updated:** [5 November 2024 07:04 UTC](https://forum.access-hive.org.au/t/running-access-om2-on-leonardo-supercomputer/1804 "2024-11-05T07:04:17Z")
Dear All, First of all I’m very glad to find this forum. I’m new in the community and just started to get into the ACCESS-OM2 configuration. The task for the moment is to compile and run test experiment on Leonardo s… --- ## [Perturbation experiments forked from ACCESS-OM2-025 RYF control run on ik11](https://forum.access-hive.org.au/t/perturbation-experiments-forked-from-access-om2-025-ryf-control-run-on-ik11/3741)
**Author:** [@ben](https://forum.access-hive.org.au/u/ben)\ **Replies:** 18\ **Last updated:** [5 November 2024 00:24 UTC](https://forum.access-hive.org.au/t/perturbation-experiments-forked-from-access-om2-025-ryf-control-run-on-ik11/3741 "2024-11-05T00:24:18Z")
Raising this as an independent issue so that we can track it and route it accordingly. See OPs comments here: @sschroeter, can you please use this topic for further discussion? --- ## [Interannual hindcast run with JRA55 not finding forcing files for year 2019 and beyond](https://forum.access-hive.org.au/t/interannual-hindcast-run-with-jra55-not-finding-forcing-files-for-year-2019-and-beyond/3811)
**Author:** [@pearseb](https://forum.access-hive.org.au/u/pearseb)\ **Replies:** 4\ **Last updated:** [4 November 2024 05:29 UTC](https://forum.access-hive.org.au/t/interannual-hindcast-run-with-jra55-not-finding-forcing-files-for-year-2019-and-beyond/3811 "2024-11-04T05:29:01Z")
Hi all, I’ve running the 1deg\_jra55\_iaf\_bgc configuration with the ACCESS-OM2. This run has come straight out of the box from the access-om2-configs, with the exception that I have modified WOMBAT. After successfully r… --- ## [Where are the datasets?](https://forum.access-hive.org.au/t/where-are-the-datasets/3816)
**Author:** [@pearseb](https://forum.access-hive.org.au/u/pearseb)\ **Replies:** 3\ **Last updated:** [22 October 2024 21:39 UTC](https://forum.access-hive.org.au/t/where-are-the-datasets/3816 "2024-10-22T21:39:01Z")
Hi all, Where are the model outputs held for the ACCESS-OM2 run with JRA55 interannual forcing? I’ve been looking on here and I might not be looking hard enough, but I can’t seem to find any information on it when I us… --- ## [Custom restarts and inputs to release-1deg\_jra55\_iaf\_bgc experiment](https://forum.access-hive.org.au/t/custom-restarts-and-inputs-to-release-1deg-jra55-iaf-bgc-experiment/3806)
**Author:** [@pearseb](https://forum.access-hive.org.au/u/pearseb)\ **Replies:** 10\ **Last updated:** [22 October 2024 06:40 UTC](https://forum.access-hive.org.au/t/custom-restarts-and-inputs-to-release-1deg-jra55-iaf-bgc-experiment/3806 "2024-10-22T06:40:43Z")
Hi all, I “payu cloned” the release-1deg\_jra55\_iaf\_bgc experiment into my home environment on Gadi. I am wanting to run a hindcast experiment (1958-2020) with the new WOMBAT-lite for CO2 flux assessment. It is the fina… --- ## [How to efficiently chunk data for faster processing and plotting?](https://forum.access-hive.org.au/t/how-to-efficiently-chunk-data-for-faster-processing-and-plotting/3735)
**Author:** [@sb4233](https://forum.access-hive.org.au/u/sb4233)\ **Replies:** 5\ **Last updated:** [29 September 2024 05:29 UTC](https://forum.access-hive.org.au/t/how-to-efficiently-chunk-data-for-faster-processing-and-plotting/3735 "2024-09-29T05:29:20Z")
Hi all, I have been using the wonderful COSIMA COOKBOOK to access the OM2 datasets for a while. It’s great for searching and loading datasets, but I am facing a bit of issue with the chunking as I am new to this type of… --- ## [Enhancing Model Evaluation Feedback Mechanisms for the ACCESS Community](https://forum.access-hive.org.au/t/enhancing-model-evaluation-feedback-mechanisms-for-the-access-community/3686)
**Author:** [@rbeucher](https://forum.access-hive.org.au/u/rbeucher)\ **Replies:** 3\ **Last updated:** [13 September 2024 03:42 UTC](https://forum.access-hive.org.au/t/enhancing-model-evaluation-feedback-mechanisms-for-the-access-community/3686 "2024-09-13T03:42:57Z")
Dear ACCESS community, In several recent meetings, and during last week’s Workshop, an important topic has come up repeatedly: how can data users and those involved in model evaluation provide meaningful feedback on iss… --- ## [Help us verify the rewritten WOMBAT](https://forum.access-hive.org.au/t/help-us-verify-the-rewritten-wombat/2236)
**Author:** [@dougiesquire](https://forum.access-hive.org.au/u/dougiesquire)\ **Replies:** 7\ **Last updated:** [7 August 2024 11:47 UTC](https://forum.access-hive.org.au/t/help-us-verify-the-rewritten-wombat/2236 "2024-08-07T11:47:20Z")
WOMBAT has been rewritten to enable it’s use in both MOM5 and MOM6. Before we release the rewritten version of WOMBAT, ACCESS-NRI needs your help to confirm that it’s behaving as expected. ACCESS-NRI have run two 1-deg … [Next page](https://forum.access-hive.org.au/tag/access-om2/65.md?match_all_tags=true&page=1&tags%5B%5D=access-om2)