Date: 25 Jun 2025
Chair: @cbull
Minutes keeper: @anton
Attendees: @dougiesquire @helen @sofarrell @ezhilsabareesh8
Minutes
Sub-mesoscale parameterisation
AS showed some results from turning on a sub-mesoscale paramaterisations, showing low salinity in Arctic.
Its hard to say if low salinity is the confirmed cause of the sea-ice thermodynamics issue, but seems likely.
Suggestions to check:
- is bathymetry shallow
- how does model surface salinity compare to WOA23
- check runoff volume at location
- investigate turning off MASK_SRESTORE_UNDER_ICE
- could use mushy rather than BL99 sea ice thermodynamics for better handling of v. low salinity
- global SST plot compared to the baseline run for overall impact of changing parameterisation
SST bias:
@aekiss identified the SST biases in OM3 25km config seem higher and sometimes different sign than the OM2-025 biases. Needs investigation and longer run.
DATM/DROF time interpolation
AS showed Fix/check time in data atm/rof stream files · Issue #437 · ACCESS-NRI/access-om3-configs · GitHub
- agreed to linear interpolate runoff and raise an issue to implement an improved runoff scheme
rho coordinate in ocean
Deferred discusson until AH is available. Dougie to organise a meeting.Compute
Quarter ends monday night - looks like its okESM1.6
@ezhilsabareesh8 has updated mediteranean sea bathymetry - deepened sicily straight. There is some impact, but not enough yet. We probably need to try doing a test run with some widening of the straits but also compare model results to observations if possible.
SoF will have a look at the output from CICE5 runs as well. DB might be on leave this week.