# \#perturbation

**URL:** https://forum.access-hive.org.au/tag/perturbation/66.md

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## [Easy forcing perturbation experiments in ACCESS-OM2 + Tutorial](https://forum.access-hive.org.au/t/easy-forcing-perturbation-experiments-in-access-om2-tutorial/4356)

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**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")

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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…

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## [Setting up ensemble runs in ACCESS-CM2](https://forum.access-hive.org.au/t/setting-up-ensemble-runs-in-access-cm2/4596)

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**Author:** [@huazhen](https://forum.access-hive.org.au/u/huazhen)\
**Replies:** 7\
**Last updated:** [11 June 2025 23:37 UTC](https://forum.access-hive.org.au/t/setting-up-ensemble-runs-in-access-cm2/4596 "2025-06-11T23:37:52Z")

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Hi there, I want to set up several ensemble runs in ACCESS-CM2. I have seen a previous post about setting up ensemble runs (Ensemble runs with ACCESS-CM2 - #5 by ars599). But the files they shared are not in those paths…

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## [ACCESS-CM2 perturbed initial conditions not applying in all cases](https://forum.access-hive.org.au/t/access-cm2-perturbed-initial-conditions-not-applying-in-all-cases/1955)

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**Author:** [@sebmckenna](https://forum.access-hive.org.au/u/sebmckenna)\
**Replies:** 3\
**Last updated:** [16 April 2024 00:50 UTC](https://forum.access-hive.org.au/t/access-cm2-perturbed-initial-conditions-not-applying-in-all-cases/1955 "2024-04-16T00:50:07Z")

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Hi all, I am running some experiments with ensemble members in ACCESS-CM2. To branch ensemble members I have used the perturbIC\_MD.py script in my git repo here: GitHub - SebastianMckenna/perturb\_access: perturbing ACC…

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## [How do I start a new perturbation experiment?](https://forum.access-hive.org.au/t/how-do-i-start-a-new-perturbation-experiment/262)

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**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\
**Replies:** 11\
**Last updated:** [11 October 2023 01:49 UTC](https://forum.access-hive.org.au/t/how-do-i-start-a-new-perturbation-experiment/262 "2023-10-11T01:49:05Z")

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How do I start a new perturbation experiment? User story As a new user I want to be able to start a new perturbation experiment from an existing ACCESS-OM2 control run. How do I identify which control run to choose? Wh…