2026-03-05
Continuing work towards next ACCESS-OM3 IAF 25km test configuration and 66-year run:
- improved Indonesian topography, GM, bottom roughness (see above)
- WOMBAT-lite BGC
- SSS restoring is excessive Maps and timeseries of SSS restoring · Issue #44 · ACCESS-Community-Hub/access-om3-paper-1 · GitHub - try to reduce
MAX_DELTA_SRESTOREDecrease `MAX_DELTA_SRESTORE` in 25km and finer · Issue #1180 · ACCESS-NRI/access-om3-configs · GitHub, but sources of SSS biases also need addressing, e.g.- high sea ice production rates, e.g. off eastern Siberian coast Excessively low T and high S in 0.25 degree · Issue #325 · ACCESS-NRI/access-om3-configs · GitHub
- high sea ice production due to latent heat extraction concentrated at the coast when there’s no lateral spreading of the iceberg calving meltwater Calving flux via iceberg distribution map · Issue #404 · ACCESS-NRI/access-om3-configs · GitHub ; iceberg flux lateral spreading code is in development Regrid iceberg fluxes on OM3 grid by anton-seaice · Pull Request #120 · ACCESS-NRI/om3-scripts · GitHub
- insufficient lateral and vertical spreading of river outflows Runoff redistribution · Issue #396 · ACCESS-NRI/access-om3-configs · GitHub
- poor western boundary current separation, e.g. Gulf Stream
- bad straits - eg Bosphorus Restrict Black Sea - Mediterranean flow · Issue #729 · ACCESS-NRI/access-om3-configs · GitHub - try methods to reduce transport C-grid bathymetry and land mask · Issue #262 · ACCESS-NRI/access-om3-configs · GitHub
ADJUST_NET_SRESTORE_BY_SCALING= True Try ADJUST_NET_SRESTORE_BY_SCALING = True · Issue #260 · ACCESS-NRI/access-om3-configs · GitHub
Request diagnostics for new run:
Other ACCESS-OM3 development
- Support for ERA5 forcing (which runs to present day, in contrast to JRA55-do, which ends in early 2024) Swapping from JRA55 to ERA5 atmospheric forcing · Issue #548 · ACCESS-NRI/access-om3-configs · GitHub
- We have no provenance for the 1° ACCESS-OM2 grid, so could not modify it (e.g. extend it further south). So a new 1° (100km) grid workflow is in development, including updates to associated inputs, e.g. topography New OM3 100km grid · Issue #1111 · ACCESS-NRI/access-om3-configs · GitHub
ACCESS-OM2
- new release soon: WOMBAT-lite and GCC compiler support