Hi, I hope you’re well. This is Rony from Curtin University in Perth, WA. I’m reaching out to seek your advice on selecting a suitable Earth System Model for studying the Southern Ocean. My area of interest spans from 30°S to 85°S and across all longitudes (-180° to 180°). I’ve heard that the ACCE…

Hi Rony, Welcome to the ACCESS Community Forum! I don’t have a specific answer to your question, but am wondering, do you want to run your own experiment, or analyse the output from existing CMIP6 experiments? I think the latter, but wanted to make sure.

Thanks for your reply. You’re absolutely right — I’m looking to use some of the output from existing CMIP6 experiments. We’ve developed a machine learning model to predict future phytoplankton dynamics (up to the year 2100), and now we need to feed it with input variables from CMIP6. Our aim is to …

Ahh, right, well that is interesting. @pearseb might be interested in your plans and give you some hints about data to look for. I don’t know if you’re familiar with his research, but @tylerrohr22 has done some ML work with ocean BGC , and also did a huge study comparing CMIP6 BGC models so might be…

Hi Rony. Earlier this year, FishMIP published a paper looking at how well 11 CMIP6 models reproduced past conditions for sea surface temperature, sea ice concentration and phytoplankton biomass at the surface. The evaluation only includes one of your variables of interest, but the paper may still be…

Thank you so much for your kind reply. I am waiting to receive more insights from them @tylerrohr22 and @pearseb

Thanks. I was present at FishMIP workshop last month, had a good discussion with so many biogeo modellers there. Got some insights like they are using GFDL and IPSL. Not sure why they don’t use ACCESS although the region they have used, kind of mix. Anyway, Now, I am looking for the best products fo…

Does the ACCESS model provide ocean data at 1/4-degree resolution? @Aidan

[image] ronygolder_curtin: Does the ACCESS model provide ocean data at 1/4-degree resolution? There are some 1/4-degree BGC studies, some of which weren’t for CMIP. I realised this was in the General category, so I’ve moved it to COSIMA > Biogeochemistry hoping it will catch the eyes of some…

Heyya, Sorry for the late reply. Do you need the BGC (e.g. Phyto biomass) from the models to train your ML algorithm or are you tuning historical model physics to historical Remote sensing BGC properties then projecting? The reason ACCESS hasn’t been used as a FishMIP forcing so much is until rec…

Not sure I can add much to what has already been said. It looks like all you need are physical variables, and given that you want 0.25º, that limits the kinds of models that are available to you in the CMIP6 archive. You will only be selecting from a few. Given that, I’d just take all of them if I w…

CMIP6 Data Recommendations for Southern Ocean Study

COSIMA Biogeochemistry

Aidan (Aidan Heerdegen, ACCESS-NRI Release Team Lead) 14 July 2025 00:46 14

Hey @ronygolder_curtin. Just to let you know I have marked this outofscope for direct ACCESS-NRI support, but hopefully you have already got some useful information, and if you need any more assistance the community can assist further.

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CMIP6 Data Recommendations for Southern Ocean Study

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