Meeting Minutes 4 Dec 2024: AUS2200/ACCESS-NRI Atmospheric Modelling WG Meeting
14 participants
Intro
Yi – AUS2200 as a CLEX project is winding down
2 science talks were scheduled, but Ewan Short had to cancel today.
Andrew Brown – Sea breeze climatology and characteristics. – preliminary results.
- 21st Century project,
- Renewable energy – strong daily cycle in supply.
- How cycles in diurnal wind can play a role in coastal regions.
- Sea breezes affect wind power.
- Develop method to detect sea breezes from model data.
- Regional ACCESS config RNS for targeted sea breeze regions.
- Sea breeze detection using frontogenesis method using moisture -“moisture frontogenesis”.
- Issue – many other regions of signatures – convection etc., making detection tricky – additional constraints needed.
- Method 2 – rate of change of moisture convergence.
2nd part of plan
- RNS 1 km resolution centred on 1) Bass Strait 2)NSW coast – several months to a year simulations.
- Other tests – surpress SST variability, use high-res ocean model output.
- Wishes to run tests to try different model options and setups if SUs are available.
Questions/comments for Andrew
Paul G. about what methods BOM uses for sea breeze detection
Chermelle about whether to do back to back simulations or one continuous simulation.
Peter S. Restart and perhaps nudging could help for long simulations.
Gradients in relative humidity as alternative.
Matt L. long simulation – 72 hour cycles vs free running.
Cycles – step changes in temperature etc., problem.
Long runs need updating SST and soil moisture.
Yi Huang - AUS2200 Story
- Initially AUS2200 project was led by Todd L.
- Captures a broad range of scales in one domain at consistent convective resolving resolution.
Aims of AUS2200
- Unite the national atmospheric community
- Make efficient use of resources
- Do transformative science that has clear path to impact
- AUS400 was predecessor 400 m resolution used huge amount of resources such as a week of wall time. So AUS2200 was aimed to give a balance of high-res vs resource consumption.
- Dale Robert in particular improved efficiencies. 10 to 18 times speedup.
- Opened up longer simulations for more cases.
- 16 Experiments and all data is now published thanks to Paola Petrelli and ACCESS-NR
dois available for the data. - Hooman’s led work – convective rolls, downward mixing leading to dry air and bushfire development.
- Chris C – role of SST in ECLs with Coral Sea most important.
- Dao Lan – MJO and local scale impacts on QLD rain. PhD.
- hanks to Scot Wales for producing tutorials/guide.
Chermelle Engel – Limited Area Modelling
- Aim – make RNS easily workable for more people.
- Bounday conditions – ERA5, blockiness in land surface data, ERA5-land better (0.1 degrees) but GRIB issues regarding getting the best resolution.
- Land options accessible in Rose Suite, can choose between ERA5-land or BARRA2-R
Comments
Yi - Move towards ACCESS-NRI supported config of RNS
Heidi Nettelbeck - ACCESS-NRI Atmosphere team 2024/25 Work Plan
- ACCESS-Hive Forum - use RNS subcategory for further discussion.
- ACCESS-NRI Atmosphere team 2024/25 Work Plan. 6-member team.
- Regional Model development (ACCESS-NRI supported configuration of RNS, 2-level nest)
- Later development, CABLE instead of JULES for land surface
- Ancillary tools:
- development of AMAMI (convert um files to netcdf, modify, etc.)
- Generating ancillary suites for climate models
and more.
- ACCESS-ESM Earth System Model:
- ESM1.5 release and ESM1.6 for CMIP7 fast-track experiments
- Later, ESM3 release - ACCESS-CM Coupled Model:
- CM2 release
- CM3 development: NUOPC instead of OASIS (more flexible coupler); Merge NUOPC coupling and AM3 development - ACCESS-AM Atmosphere Model:
- AM3 beta release with post-processing
- High-resolution global AM3 testing in collab. 21st Century Weather - Cross-organisation projects
- Releases of ACCESS models
- ACCESS-Hive Docs and Forum support
- Model Optimisation
- Working Group liaisons
and more…
Wrap-up
- Yi – resources available for simulations- consider
- Next WG meeting in February 2025