# Project Proposal: Benchmarking of ACCESS-S2 precipitation against other international global seasonal forecast models available on C3S **URL:** \ **Category:** Experiments\ **Tags:** model-evaluation\ **Created:** [19 December 2025 04:00 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716 "2025-12-19T04:00:03Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![jatin](https://avatars.discourse-cdn.com/v4/letter/j/f04885/32.png) [@jatin](https://forum.access-hive.org.au/u/jatin)\ **Post date:** [19 December 2025 04:00 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/1 "2025-12-19T04:00:03Z")
**Experiment title 🔔:** Benchmarking of ACCESS-S2 precipitation against other international global seasonal forecast models available on C3S **Summary 🔔: Short lead-time seasonal precipitation forecasts from the ACCESS-S2 seasonal forecasting model will be evaluated against AGCD and ERA5 and additionally bench-marked against other global seasonal forecast models (**[ECMWF](https://www.ecmwf.int/en/forecasts/documentation-and-support/long-range) [UK Met Office](http://www.metoffice.gov.uk/research/climate/seasonal-to-decadal/gpc-outlooks), [Météo-France](http://elaboration.seasonal.meteo.fr/), the [German Weather Service (DWD)](https://www.dwd.de/EN/ourservices/seasonals_forecasts/project_description.html), the [Euro-Mediterranean Center on Climate Change (CMCC)](https://www.cmcc.it/projects/c3s-seasonal-forecasts), the [US National Weather Service’s NCEP (NCEP)](https://cfs.ncep.noaa.gov/), [Japan Meteorological Agency (JMA)](https://ds.data.jma.go.jp/tcc/tcc/products/model/outline/cps2_description.html) and [Environment and Climate Change Canada (ECCC)](https://climate-scenarios.canada.ca/?page=seasonal-forecasts).**) currently publicly available on C3S portal.** **Scientific motivation: To better understand the source of precipitation biases in the ACCESS-S2 seasonal forecast model, with a particular focus on southwest Western Australia, a region where agriculture is predominantly rain-fed with minimal to no irrigation. This will help directly inform biases emerging the from UM, which is directly relevant to ACCESS-ESM-1.X.** **Experiment Name 🔔:** ACCESS-S2 precipitation forecast skill in southwest WA **People 🔔:** Jatin Kala (Murdoch University), Debbie Hudson (BOM), and Rebecca Firth (PhD student) **Model:** ACCESS-S2 **Configuration:** N/A - we will use existing outputs **Initial conditions:** N/A - we will use existing outputs **Run plan:** N/A - we will use existing outputs **Simulation details:** N/A - we will use existing outputs **Total KSUs required 🔔:** approx 5KSU **Total storage required 🔔:** approx 3 to 5 TB **Outputs:** N/A - we will use existing outputs **Restarts:** N/A - we will use existing outputs **Related articles:** [https://doi.org/10.1071/ES24004](https://doi.org/10.1071/ES24004) **Analysis: Analysis will use of Python and CDO, largely single CPU jobs. Some jobs may use DASK with up to 16 CPUS, but not much more. All analysis will use existing data-sets** **Conclusion: This is a “low-hanging fruit” project, requiring minimal SUs, but will be very useful towards better understanding biases emerging from the UM in ACCESS-S2. It is acknowledged that this is not directly related to ACCESS-ESM-1.X, however, both models use the same atmospheric model and lessons learnt in this project will be very useful to the broader community.** ---
**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:** [19 December 2025 05:12 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/2 "2025-12-19T05:12:57Z")
Hi @jatin, thanks for submitting this project proposal! I just wanted to check whether the 3-5 TB storage required would be on `lg87`, and if so whether you had a rough idea of how long you would need the storage for. ---
**Author:** ![jatin](https://avatars.discourse-cdn.com/v4/letter/j/f04885/32.png) [@jatin](https://forum.access-hive.org.au/u/jatin)\ **Post date:** [19 December 2025 05:52 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/3 "2025-12-19T05:52:56Z")
Hi Spencer,Yes, we will need the storage on the relevant working group’s project at NCI. This is my first proposal, so I am not across all the project codes associated with ACCESS-NRI. I would say probably around 9 months to 1 year, upon completion, all data will be removed of course. Regards jatin ---
**Author:** ![jatin](https://avatars.discourse-cdn.com/v4/letter/j/f04885/32.png) [@jatin](https://forum.access-hive.org.au/u/jatin)\ **Post date:** [19 January 2026 03:18 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/4 "2026-01-19T03:18:21Z")
Hope everyone had a good break over the new year, just checking if any additional information is needed. Regards Jatin ---
**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:** [20 January 2026 05:57 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/5 "2026-01-20T05:57:42Z")
Hi @jatin, apologies for the delay in getting back to you. I’ve checked with the working group co-chairs and we’re happy for you to use working group resources for this project ---
**Author:** ![jatin](https://avatars.discourse-cdn.com/v4/letter/j/f04885/32.png) [@jatin](https://forum.access-hive.org.au/u/jatin)\ **Post date:** [20 January 2026 06:25 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/6 "2026-01-20T06:25:48Z")
> [@spencerwong](#): > > lg87 Thank you all, much appreciated =) Just to confirm, the next step is myself and my PhD student request to join lg87 and we can start working on the project? Regards Jatin ---
**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:** [20 January 2026 06:30 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/7 "2026-01-20T06:30:06Z")
> Just to confirm, the next step is myself and my PhD student request to join lg87 and we can start working on the project? That’s correct! ---
**Author:** ![jatin](https://avatars.discourse-cdn.com/v4/letter/j/f04885/32.png) [@jatin](https://forum.access-hive.org.au/u/jatin)\ **Post date:** [23 March 2026 08:45 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/8 "2026-03-23T08:45:33Z")
Hi Spencer, The project is progressing well. Just as a head-up, the student’s other supervisor at Murdoch (Dr. Kerryn Hawke) will be requesting to join lg87 shortly, just thought I give you a heads-up. Kerryn is joining to assist with some Synoptic Typing analysis code that Rebecca (the student) will be running on the data. I assume this should all be Ok. It’s just easier to help debug the code for Kerryn to have direct access to Rebecca data and code on lg87 ---
**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:** [23 March 2026 09:24 UTC](https://forum.access-hive.org.au/t/project-proposal-benchmarking-of-access-s2-precipitation-against-other-international-global-seasonal-forecast-models-available-on-c3s/5716/9 "2026-03-23T09:24:31Z")
Hi Jatin, great to hear that the project is going well! I’ve just approved Kerryn’s membership request.