CSIRO - ACCESS-NRI standup minutes

CMIP7 CMIP7 development
62

Meeting Notes 07/11/2025

Participants: @anton @MartinDix @sofarrell @clairecarouge @pearseb @Jhan @Aidan @alexnorton @lachlanswhyborn @manodeep @paulleopardi @rbeucher @spencerwong @tiloz @RachelLaw @inh599

Chair: @clairecarouge

OASIS3-MCT version

Question from Manodeep whether it is ok to pick up a newer version of oasis3-mct for ESM1.6. Decided updated versions of dependencies is part of the optimisation work and there is no objections as long as the results do not change (tests suggest results will be identical).

DOI for models

Aidan: we publish our models on Zenodo to get a DOI. There is a draft Zenodo record. We would like input from the community, especially around proper acknowledgments. Please add any comment to the GitHub issue.

Frozen model

Build

Lachlan is working on on incorporating the latest UM and CABLE changes to the build. Will be merged in soon.

Anton working on CICE changes. To be incorporated when ready.

Configurations

PI-control

Temperature drift in the ocean: Martin did some comparisons with WOA23 dataset. Results show we are not worst than ESM1.5 compared to WOA23. Siobhan commented the ocean is globally cooler in ESM1.6 than ESM1.5 so globally, we have a less warm bias at the top of the ocean and a cooler bias at the bottom.

Decision was made at the latest NESP meeting to use “October B” test for the spinup. The tests Oct-A and Oct-C are now stopped.
Spencer to update the dev-preindustrial+concentrations with the October B configuration plus volcanic input changes.

Pearse is still working out the best sinking rates for WOMBAT. These will be integrated to the configuration when ready.

The land folks are testing a new vegetation distribution (to solve the “disappearance” of dust over Australia) and updated vegetation parameters for the Australian PFTs. To be integrated when ready.

Paul is working on the nitrogen and ozone forcings. To be integrated when ready.

AMIP

Spencer will update the AMIP configuration to correspond to the updated dev-preindustrial+concentrations.

Historical

Rachel asked about the status of this configuration. Martin says it’s best to redevelop from the updated PI-control and AMIP.

Outputs

Paul noticed the surface altitude field is not bitwise identical between output files. Martin to have a look, he suspects we output a monthly average which would give small differences for months of different lengths.

Optimisation

Manodeep says 5 nodes gives 25 years/day while currently we get 21 years/day, this would be at a similar cost. Should we do optimisation work at 5 nodes?
Tilo and Rachel say yes, we want the throughput considering we are already late on the schedule.

CMIP7

New round of survey from CMIP7 has been released. Meeting next week for a sub-group of people to add the required information.

*Next meeting: this coming Tuesday (11th November), on normal schedule.

ACCESS-ESM1.6 development
63

Meeting minutes 11/11/2025

Chair @clairecarouge
Minutes @cbull
Participants: @cbull @anton @clairecarouge @MartinDix @sofarrell @inh599 @spencerwong @Jhan @Aidan @alexnorton @lachlanswhyborn @manodeep @paulleopardi @RachelLaw @rbeucher @tiloz @pearseb

Land and atmosphere build changes

Lachlan: build for version 2025.11.000 should be ready, in final review stage.
Manodeep: oasis3-mct change to upstream might come in after that release as need more time for testing.

sea ice changes

Anton: still confused about the snow on sea ice variables and how they want them averaged
Emailed the sea-ice mip people (Patricia Derepentigny) – no response. Also emailed someone from NCAR.
Martin: different to cmip6? Anton: don’t think it’s different.

BGC update – change in sinking rate

@pearseb. Now run for 150 years each of the sensitivity experiments. Will use CO2 flux as a benchmark. Who I send the parameter changes to? Response: @spencerwong. @pearseb by end of today/tomorrow.

@RachelLaw: perhaps we want to consider tacking Pearse’s run onto the end of the existing candidate? @tiloz part of the issue here is how long the sinking rate changes take to equilibrate. @pearseb ~200+ years. @tiloz : sounds like it’s worth considering then.

@tiloz. Having said that, whilst we’re still deliberating, still worth continuing the October B run.

@clairecarouge: who’s creating the combined restart? @pearseb hasn’t done this recently, but can look into it. @RachelLaw just fudge the date perhaps? @pearseb will likely have a chat to Spencer once he has a plan.

latest vegetation distribution

@RachelLaw: struggling to get a stable run with latest setup. Wondering what’s wrong with the restart file. @MartinDix is happy to have a look at that.

I think (!) these are the details from @RachelLaw

Martin - in this directory /scratch/p66/rml599/payu-tests/test-restart-nov10/restart410/atmosphere, restart_dump.astart.orig works, restart_dump.astart.new doesn’t work. The README gives the location of the file that I copied to restart_dump.astart.new.

@inh599 do we need to provide a number of active tiles? @MartinDix no, it will work that out at run time. @inh599 what about when the um reads the restart file? @MartinDix No, the restart file includes all files and the restart fraction.

@clairecarouge what is the status of the updated vegetation parameters tests? Do we want to include them in the configuration? @alexnorton: where did @Jhan get up to on that? @Jhan: been wondering where to take that.
@RachelLaw : we’ve changed one more of the c4 crop parameters (moving from a hardwired value). The test is really to make sure it’s stable (?). @Jhan and @alexnorton will follow up offline.

forcing update

all following up from @paulleopardi

  • Nitrogen forcing for pre-industrial control
  • working on the ozone forcing (was trying to make do without the temperature information but that has since come through)
  • has a follow up meeting today

Misc

  • @manodeep would appreciate an amip configuration for testing UM7 compiler flags - easier to check for bitwise reproducibility and performance in the amip model (rather than a coupled model).
ACCESS-ESM1.6 development
65

Meeting minutes 18/11/2025

Chair @clairecarouge
Minutes @spencerwong
Participants: @harshula, @spencerwong, @RachelLaw, @paulleopardi, @MartinDix, @sofarrell, @lachlanswhyborn, @clairecarouge, @Jhan, @manodeep, @anton, @inh599, @rbeucher, @dhb599, @pearseb, @alexnorton, @dougiesquire

Configuration changes

  • The sea ice diagnostic changes have been added to the build and can now be brought into the configuration

  • A decision was made to update the sinking rate parameters without changing the restart file

  • @Manodeep will swap the configuration to 5 nodes, as this is known to boost throughput.

  • The pft parameter changes have not been analysed yet, however increasing the bare ground fraction over Australia has not worked to increase the dust. Given the timeline, it was decided to not try adjusting this any further and instead document that the PFT changes have caused a reduction in dust.

  • The plan is to consolidate the remaining land changes into this PR: Pre-industrial config for optimisation by blimlim ¡ Pull Request #268 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub
    @Jhan will send changes to @spencerwong or add them to the PR directly

New forcings

  • The updated nitrogen forcing should be ready today and @MartinDix notes that the patterns have changed. To understand its effect, we’ll set off runs with and without the new version after the above configuration changes are merged.
  • @paulleopardi is working to use the met office’s ozone processing code now that the required temperature data is available. It was noted that the forcing needs to be ready next week for the next stage of the runs.

Spinup table

  • @inh599 notes that the spin up table needs to be updated to make it clear which runs were kept in the main spinup, and which ones were dropped.

There was a brief note “This was started as a test configuration to investigate the bug.” already there, but this has been expanded upon - Jhan

AMIP and historical configurations

  • @RachelLaw and @tiloz noted that having a test historical configuration is urgent, even if it is not completely up to date with the latest preindustrial configuration as it will allow for tuning carbon
ACCESS-ESM1.6 development
66

Meeting notes 25/11/2025

Chair: @clairecarouge
Minutes: @cbull (started a few minutes late)

Participants: @paulleopardi @clairecarouge @lachlanswhyborn @pearseb @Jhan @MartinDix @spencerwong @sofarrell @dougiesquire @dhb599 @harshula @manodeep @cbull @anton (at end)

@Jhan reported that the November test runs are now working after some hiccups with the configuration and Gadi on Friday.

@Jhan AMIP config failing after first year due to old land use change data writing over new Aus PFTs vegetation, creating bad tiles.

Manodeep has been optimising the AMIP config by adding compiler flags to UM7 - gains have been minor. The best case has a throughput of 25.2 years/day vs the base throughput of 24.9 years/day. All finished 1-year runs with these updated compiler flags have been bitwise-identical. Details are here

@Jhan was interested in whether the AMIP configuration might scale (inefficiently) with more nodes? @manodeep looked into this a while ago with amip didn’t scale beyond a specific number of nodes but that was a while ago before quite a few changes were made. @manodeep will investigate.

@pearseb: looked at CO2 fluxes last night. Standard sinking parameter the values have came down to zero (good) – promising!

@MartinDix: nitrogen deposition change is in. What would we expect to change? Would be good to follow up with @inh599 or @RachelLaw @tiloz @alexnorton [please provide guidance here to know what to plot to compare the old vs new nitrogen deposition runs and reaching equilibrium!]

@paulleopardi gave a forcing update. [please put details here @paulleopardi]

@clairecarouge documentation work and release. Open to volunteers for people getting involved.

@manodeep, which configurations would be part of the release? @clairecarouge likely the picontrol config to start, then drip feeding the others as they are ready.

@manodeep has been looking into calculating the amount of energy used for reporting purposes. Query around which runs to count. @MartinDix clarified one just comes up with a number that the configuration costs.

@spencerwong other configurations update. prototype historical simulation seems to be running without issues but would like to include the cmip7 solar forcing (@paulleopardi has worked on this and there’s a pr in process). Will need some reviews soon.

ACCESS-ESM1.6 development
67

Meeting minutes 02/12/2025

Participants: @Jhan @clairecarouge @pearseb @dhb599 @dougiesquire @inh599 @lachlanswhyborn @manodeep @MartinDix @paulleopardi @RachelLaw @sofarrell @anton @Aidan
Chair: @clairecarouge
Minutes: @cbull

Off-topic but @Jhan thinks he doesn’t have write privileges to the am3 repo.

bgc update

@Jhan we have the two sinking rates tests going that have 130 and 150 years run so far (high and standard). @pearseb let’s go with the “standard” value.

ozone forcing

@MartinDix should be able to get it out in the next few days (pi control).
@paulleopardi pre-industrial ozone is currently being worked on
@paulleopardi: working on the preindustrial ozone forcing, but am not sure if the UK Met Office code will work in our context. @paulleopardi has a fallback that calculates the ozone in a different way, but not yet sure if that calculation is valid.

optimisation update

gadi’s problems have slowed work down
With the latest version we’re still getting 25 years per day with 5 nodes.

Manodeep is doing a load balancing analysis using oasis3mct, just started but this kind of work hasn’t been done in the past so maybe there is some scope for performance improvements.

Re: Amip performance. Last week there was a request to see if performance would be improved from increasing from 2 nodes to say 5 nodes. @MartinDix won’t be running amip runs immediately so you’ve got some time.

@anton is amip part of fast track? yes.

misc configuration discussion

@clairecarouge: what’s next for planning on the configurations.
@RachelLaw. We want to run:

  • pi control
  • emissions driven pi-control
  • any of the idealised run that branch off pi control (e.g. 1% CO2, 4xCO2)

@anton How long is @spencerwong away for? (tomorrow) – relevant as Spencer was working on keeping all the configs sync’d up. @MartinDix emissions driven is pretty simple to set up.

We would like to keep amip up to date too.

@MartinDix would like to do some configuration clean up. Getting rid of an unused namelist variable(s), configurations will need to be updated.

plan for a release?

@anton. Should we press on for multiple configurations releases. This year? Next year? Some of the things to do include: Creating a release branch / release tag / publicly, Final configuration, Forcing finalised?

@Jhan missing field in sea ice? Is this part of the release @anton?

@inh599 doesn’t think we can go to full. Haven’t checked the stash codes. Thinks a beta is realistic.

@cbull. What kind of release are we aiming for? Full, beta?

@Aidan does not have specific plans in terms of a release.

@clairecarouge thinks the documentation needs improvement before release. Some offline discussions have suggested that people don’t have time before January. Interested to hear best ways to coordinate this.

On config documentation, we have some notes here.

Perhaps sections could be assigned via sub-issues of this issue?

@anton project board could be used too.

Misc

@cbull will be stepping away from ESM1.6 coordination to work on OM3/CM3 evaluation. @anton will take on the role.

ACCESS-ESM1.6 development
68

9 Dec

Attendees:

Romain Anton Rach Claire Paul L Martin Lachlan Spencer Jhan Tilo Manodeep Siobhan Ian Dave Bi Aidan Alex N

Chair: Claire

Current spinup:

Jhan - 250 years

CMIP7 Pre-industrial Forcings

Paul L - Ozone forcing preperation code in final stages/review

Marting Did a short test run

This would make the Preindustril forcings complete for CMIP7

Historical forcings still need more work

Diagnostics - need to review for CMIP7 still

Clare: Need science review of data request to then match up with stash request / codes

Needs both science and technical input to complete this

Ian: might want options to low/high/medium amounts of output for different periods in the request

Too many configurations is a concern - we only want one configuration for one experiment

- Spencer - we are using symlinks at the moment to enable this, could work. It’s a little bit manual

- Martin - can we automate the switch (e.g. through payu or a user script ?)

Martin and Spender to investigate

Atmos/Land

Rachel: subdaily data only relevant for historical and scenarios - see [ #164]( Additional stash outputs for data request ¡ Issue #164 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub )

There is a list of mappings from data request → stash codes which might provide some good input

Need to confirm completeness withs needs in moppy (post-processing) too.

Martin / Spencer / Clare / Romain / Ian + - meeting at 4pm today

Ocean

There is the start of an issue for diag_table comments - Siobhan/Matt/Pearce/DaveBi have some feedback on diag_table - see [#303]( Changes to diag_table for the final configuration ¡ Issue #303 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub )

Dougie might be able to help with editting the diag table - Anton to ask

Optimisation - Manodeep

Using MOM collate changes from 25 years to 27 years per day

10% improvement in throughput

Non answer changing - could be implemented later without changing answers - Improve collation process ¡ Issue #311 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub

Also raised New `$NNOREST` flag in oasis3-mct v5.2 ¡ Issue #300 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub on missing coupler restart information - agreed to defer for now

69

16 Dec:

Attendees: Martin, Anton, Rachel, Manodeep, Lachlan, Ian, Tilo Spencer, Dave Bi, Siobhan, Alex, Paul Leopardi

Chair: Martin

Final Nitrogen and Ozone Forcing for preindustrial under test by Martin

  • Slightly more ozone → slightly less radiation to the surface → possibly slightly warmer atmosphere

  • Historical aerosal and CO2 emissions need some more preparation still

Updates to pre-ind configuration

  • To finalise: updated UM build with some optimisation, better CASA statistics

  • Updated stash codes for CMIP data request implemented by Spencer. Adds lost of data - 6hourly output on model levels might be for shorter periods of the total runs.

  • Dougie has implemented input from Matt Chamberlain, Dave Bi, and Siobhan on ocean diag table

  • Ian: need to check snow temperature over land - should be a mass weighted temperature. Probably not provided by the model, might need to save 3d temperatures (and mass to do this ? ) Also a high priority variable for canopy albedo is not available in the model currently. Could be reconstructed in post-processing but not confident on the correctness of the methodology in post-processing

Other configurations:

  • after final changes to preind+concentrations, need to move changes into idealised configs (1%CO2, 4xCO2 and emissions driven are priorities)
  • test runs only at this case, re run later for offical run. (Could be provided as “pre-control” run outputs?)

Tilo and Jhan are available to check runs don’t crash over Christmas / NY

Performance -

  • changing MOM IO layout is most significant - deferred for now

Next Meeting

  • Will still meet next week to check on runs over Christmas for configurations

  • Also meet on the 6th Jan for whomever is around.

70

23 Dec

Attendees: Martin, Rachel, Spencer, Lachlan, Jhan, Manodeep, Paul, Siobhan

Updated configurations:

There was a new UM release 2012.12.000, with some optimisations, logging reduction, changes to CO2 flags and improvements to STASH prcocessing of CASA variables. No change to results.

dev-preindustrial+concentrations: Update to use new UM and CMIP7 ozone. Updated STASH to better meet data request. Uses year 2676 restarts from Nov25-NewNitrogen-Nov25

Jhan is running a new spinup with this. See end of ESM1.6 Spin-up experiments

The following configuratations have been updated to be consistent with dev-preindustrial+concentrations(e.g. same restart, forcing, STASH)

  • dev-1pctCO2
  • dev-4xCO2+concentrations
  • dev-historical+concentrations (still with CMIP6 GHG and ozone)
  • dev-preindustrial+emissions
  • dev-flat10
  • dev-1pctCO2-rad
  • dev-1pctCO2-bgc
  • dev-amip

Results:

Rachel reported that a 1% test run showed lower land CO2 uptake than ESM1.5 (which was already low compared to other CMIP6 models).

Still problems with netCDF conversion failures.

Forcing:

Paul now working on CO2 emissions.

No update yet on the discontinuity between PI and historical ozone

71

6th Jan

Esm1.6 Standup

Attendees:

Ian, Anton, Jhan, Claire, Tilo, Paul, Romain, Spencer, Pearse, Dougie

Runs over Christmas

  • Ian and Tilo have made some figures - ocn latest runs (pi + concentrations and pi + emissions) look ok

  • A couple of filesystem issues over Christmas, needed restaring a few times

  • One conversion failure

to-dos:

  • Calculate climate sensitivty from 4xCO2 - Tilo

  • Ozone missing and CO2 from CMIP6 for historical config - Paul is following up - needs final reviews. There’s may be an issue with the ozone forcing from upstream.

  • Be good to start a run with the CMIP6 Ozone in the interim. - Spencer to finialise config for this and Tilo to run.

Clock - Ian

  • should we reset the clock to year 1 ?

  • mostly to not confuse ourselves with diverging runs - (all the historical and idealised runs need to start from the same year)

  • Consensus was to not change the clock, we just need to pick a consistent start year:

  • This might be the year from the “December” restart - year “2676”

  • Or it might be a later year, for neatness or to use a later year.

In CMIP6 esm1.5, calendar started from year 101.

Start years need to be documented and used consistently

Next week:

Config release planning

72

The ozone issue is Discontinuity between PI control and historical ozone ¡ Issue #400 ¡ PCMDI/input4MIPs_CVs ¡ GitHub

73

esm1.6 standup on 13th Jan

Attendees:

- Claire, Anton, Ian, Aidan, Jhan, Paul, Spencer, Martin, Tilo, Lachlan, Rachel, Pearse, Dave, Alex N, Dougie

1% CO2

Rachel presented some results showing that uptake of CO2 by BGC is too weak.

When run with only BGC uptake of CO2 (atmosphere CO2 not changed) - BGC is too weak

Tilo & team have some runs to break this down into Carbon / Nitrogen / Phosphorus etc

Ian - is there an earlier 1% CO2 run we compare to? There is but we these use CMIP6 Nitrogen and before Australian PFTs

Pi-Control

Ian - we probably can stop the current spinup. We are outputting lots of data (sub-daily) but can stop doing this for now until later in the spinup. (Assuming there is enough data to test MOPPY)

Tilo - we can hold pi-Control runs (up to a nice round ~500 years would be ok) but land carbon needs to be fixed.

Release - Claire

- need to understand timing for a set of configuration releases

- how much documentation is needed

On agenda for friday CMIP7 leadership meeting

Other

- /g/data/p73 is the best place to look at picontrol spinup data

- Aidan will move Oasis MCT from upstream gitlab into our git fork for better provenance

74

20 Jan 2026

Paul Anton Rachel Martin Tilo Claire Dougie MattC Spencer Pearce Romain Siobhan DaveBi Jhan Ian Aidan

Issue from last week with Carbon uptake (Tilo)

  • looks like Phosphorus uptake was incorrect and can be fixed in the namelist. Need to run a few hundred years to confirm.

  • Also have start a CN case (no Phosphorus) as a back

  • Rachel has/will started two historical runs to confirm this result looks ok.

  • Hopefully be ready next week to decide a common start year

Functionality to change restart year more easily (Tilo):

  • output folder doesn’t match the model calendar, which is confusing for folks used the script system

  • we can change the restart file, to set the restart year

  • could we have a payu feature to change the “start year” currently changing the model calendar is a manual step, should we script it / add it to payu

  • Martin will make an issue

Are restart files compatible between emissions and concentrations runs (Tilo)?

  • we have to add an emissions field to the restart file

  • Spencer to add to docs how to do this

There are three time dimensions in Atmosphere output (Rachel)

  • Something we may need to live with for now, although it’s confusing

  • Spencer to make an issue

Historical+emissions (Tilo)

  • Needs review to include CMIP7 emissions, currently using CMIP6 ozone and cmip7 other stuff

  • Martin has asked about the Ozone problem again.

Config Releases

  • docs will focus on the how to run docs

Martin to chair next week

75

27 Jan

Martin, Anton, Matt, Romain, Pearse, Jhan, Paul, Manodeep, Rachel, Aidan, Spencer, Siobhan, Dave Bi

Martin:

Tilo did a 4xCO2 run which looks ok - from the “december” restart

Input4Mips think there is an issue with the Historical for Ozone forcing, so hopefully ok to continue with pre-industrial

CNP vs CN - Rachel

Phosphorus leaching rate fix has an impact but is slow to lead to changes.

No phosphorus is a possible backup, (CN vs CNP)

Leaning towards doing concurrent CN and CNP runs - and decide in the future which one to use for PI control ?

Switching projects (Jhan)

- Tilo has had stability issues running with different projects. Less stable - unclear why, as it runs, so appears configured correctly.

Deployment versions

- Spencer & Anton have a minor correction to CICE5 diagnostics - needs a new deployment

- Aidan will resolve the Oasis3-MCT build to use our fork

- to do this week

Also aim to move the spack versions this week, but may not be possible.

Performance

Manodeep has found a doubling in nodes for AMIP configs only offers a 25% speedup. Probably won’t proceed.

76

3 Feb 2026

Paul, Anton, Claire, Martin, Tilo, Manodeep, Siobhan, Spencer, Rachel, Aidan, Jhan, Matt, Lachlan, Romain, Dougie, Pearse, Alex

2026.01.000 - repro over restarts changes with UM7 optimisation flags

Restart output changes when moderate optimisation set for the UM7 build

Gives about 0.3 years per day improvement, (~1.5%)

Aidan will work to revert the change to the compiler flags in the UM7 spack package, to make a deployment without the UM7 optimisation flags

Jhan suggest only changing one flag at time (`-march, -O, -unroll` etc)

Manodeep suggests it may be a logic problem in the code, or inconsistencies between 4-byte and 8-byte representation

Will keep debugging for now

Historical Config -

Woodthinning might be having a larger impact than expected

Phosphrous -

Appears to be resolved

some new spinup with re-initialised “pool” sizes to more realistic values, this will feedback into an “official” spinup

Emissions driven

Tilo asks how to initialise an emissions driven run

Spencer and Martin to work on this

Ozone forcing

Appears to be errors in the Historical ozone, and discontinuity with PI control - Should be fixed Historical forcing this week.

May need to switch using the average of first twenty years historical for ozone forcing of the PI control. This could impact ocean spinup, so will need a couple of hundred years of spinup to confirm.

Impacts models which use prescribed ozone (some others models would use interactive ozone)

77

10 Feb

Martin Anton Tilo Claire, Siobhan, Romain, Rachel, Aidan, Spencer, Manodeep, Jhan, Dave Bi, Alex Norton, Dougie

Ozone forcing

There is a draft of the v2.0 of the ozone forcing, which looks much improved and removes most of the discontinuity between PI and historical.

Using the climatology of first 20 years from historical for the PI control seems like the best way forward. Will do some more spinup with that.

Is there / will there be a citation for v2.0 of the dataset ?

PFT Lookup

  • there is an updated config
  • /g/data/p66/txz599/data/ancil/casa_cnp/pftlookup_cable3_OctB_test.csv

Spencer will organise to get this into configs

Restart output from UM

Martin thinks he has found the issue in the restarts that come up when compiling with optimisations
Appears like an old bug which only shown up when compiling with -O2

Martin has a fix for this bug, but then there is a second bug when compiling with the optimisation flags, so might need more work?

Test data for “REF” development

A request has come in for test data from historical for the “REF” - Romain and Rachel to discuss

Power consumption

Received request for information from Energy Consumption and Carbon Footprint Task Team - forwarded to Manodeep.

Spack 1.1

We should transition to spack 1.1 before doing publically announced config releases to make support easier

Amos next week - we will still meet

78

17th Feb

Paul, Anton, Claire, Jhan, Manodeep, Romain, Spencer, Harshula, Dougie, Lachlan, Martin

Apologies: everyone at AMOS

Ozone

Most of the problem with the discontinuity between PI and Historical was fixed in v2

Recommendation from IP is to keep using PI Control ozone (which is slightly inconsistent with Historical v2)

→ Can start PI control with Phosphorus fix and year restart (or use some existing results with Phosphorus fix)

-> Martin will confirm with Tilo he want’s to restart from

Issue with restart year number

Changing the year to year 1 is answer changing ? - see Changing restart year to year 1 ¡ Issue #449 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub

We’ll try and figureout if its harmless (hopefulyl quick) otherwise use year 101 instead

Spack v1.1

- Tommy will make a PR soon to use spack v1.1 (instead of spack 0.22)

- Spencer will retest for historical repro

Optimisation

  • Using -O2 with UM a low priority, will park for now
79

24 Feb

ESM1.6 standup

Harshula, Anton, Rachel, Martin, Siobhan, Tilo, Romain, Paul, Manodeep, Pearse, Spencer, Matt, Alex, Jhan, DaveBi

Spinup configs

Pre-Ind & CN-only Pre-Ind

- configs are running now

- reset to year-1

- with final checks, this should be PI control

Emissions driven - Spencer will work on PI control this morning

Historical - Paul is doing final changes for Ozone, and need to update GHG

Idealised configs should be ready today as well - Spencer

Rachel - transition configs from concentration to emissions

- Martin will update instructions on how to do this (referenced hh5)

- can add the extra CO2 fields needed for this transition to all restarts

Rachel - historical w/ tree thinning

- fails with exceeds JobFS quota

- will increase in configurations (there is 400GB per node and we request 300MB per node, and no downside to increasing the request)

80

2 March

Clare, Anton, Martin, Paul, Rachel, Jhan, Siobhan, Tilo, Romain, Spencer, Aidan, Dave, Alex, Pearse

Control Runs - Rachel/Tilo

These are running:

Pi Control, 4xCO2, 1%CO2, emissions driven control (CNP)

Pi Control - CN-only

Likely to publish from after restart100 (is that year 102 ?) - these have sub-daily output enabled.

Need to get historical going next - Ozone should be processed and available now

Also need

Two flat10 variants + two more

- branch from flat10 after 100 years

- can re-use forcings from esm1.5

Spencer & Martin will setup

Netcdf conversion - Tilo

  • seems more stable in production runs ?

- seems to skip some months - Spencer to investigate

- /scratch/p66/txz599/access-esm/archive/1pct-cou-01-expt-437f81c7/output033/atmosphere/netCDF

Data - metadata

- single variable per file for netcdf conversion - not implemented ?

- some details for output standard spec not quite there yet in model output

- consult with Josh on exact needs - ACCESS Output Data Specifications

- these details will get handled during CMORisation but are needed for other experiments

- Aidans example: Test addmeta by aidanheerdegen ¡ Pull Request #523 ¡ ACCESS-NRI/access-esm1.6-configs ¡ GitHub

Config Releases

- Anton to organise a meeting with Spencer and Claire to scope what / how much to release

- Also figure out any remaining work

Evaluation

  • do we want an evaluation repo like esm1.6 ?

- NESP project will take the lead on this

- probably in a less formally coordinated way / contributors can make figures / do analysis in their own way

ScenarioMIPs - Paul

- preparing forcings for these would be good

- two scenarios are set as higher priority (from upstream)

81

ESM 1.6 Standup - 10 March

Claire, Anton, Rachel, Martin, Pearse, Josh, Aidan, Spencer, Siobhan, Manodeep, Jhan, Paul

Apologies from folks at CMIP meeting in Tokyo

Historical configs - Rachel

  • now includes CMIP7 Ozone and GHG in the two historical configs
  • Spencer has one change to update the RSL? files

Early results from historical+emissions tests look good.

  • need to finalise work with wood product pool to finish configs

flat10 - Martin / Spencer are still working on this

Zenodo record for model deployment

Netcdf conversion from last week (Spencer)

  • worked on re-run, will keep monitoring

Metadata in data output

ScenarioMIPS

Ozone and Nittrogen may not yet be available ? - Paul

Atmosphere Pertubations

  • Martin will follow up with Jhan to make sure pertubation seeds are being recorded

Spack v1.1

  • 4% faster with new deployment, optimised differently but answers are bfb
  • If using pre-release infra, close PR and make a new PR
  • If using local builds, do a new install of spack