ESM working group: Meeting notes 2023 (Archived)

[Aidan (Aidan Heerdegen, ACCESS-NRI Release Team Lead)]

Date: 08/06/2023

Participants: 15

Chair: @LaurieM

Admin

Change next meeting to 3.30pm. Science talk volunteers.

AMOS 2204

AMOS Session proposal deadline tomorrow. Some already part of proposals. @Harun_Rashid, @tiloz, Ian Patterson and @eunpalim organising coupled modelling session past few years. Happy to work with volunteers from ESM Working Group. Will co-organise. Any volunteers from WG, let Eu-Pa know, today or early tomorrow morning.

Working group resources

No-one has volunteered to use ESM WG compute resources with 3 weeks to go. Anyone need compute resources this quarter, or ideas for next quarter. Organise and develop proposals around shared experiments useful for community. @tiloz has runs which could use up remaining resources. @Aidan contact Tilo and see if he can us use it

@ShayneM will talk to Arnold about running more members in CM2 historical and SSP members.

@LaurieM Should put proposals on hive, transparent, might encourage others to suggest experiments. ACCESS-CM2-025 runs starting soon. CM2 with WOMBAT. Dave Bi is leading this.

Reply to this topic to discuss using the available resources:

ESM Working Group Resource Allocation Guidelines

At the WG meeting today @LaurieM noted that no-one had made any proposals to use the compute resources ACCESS-NRI has made available to the ESM Working Group. As there is so little time left @LaurieM suggested we should ask members of the group who are currently running simulations if they could make use of this time. Specifically @tiloz is running a number of ensembles that he would like to make available to the community to use. Also @ars599 is working on CM2 ensemble runs, and @ShayneM has…

ACCESS-NRI Workshop

@dkhutch attended program committee meeting. Structure of workshOP

1. Mon: Training day
2. Tue: Main workshop
3. Wed: Main workshop
4. Thu: Working group day
5. Fri: Optional second working group day

Does ESM WG want a second day? Probably only a day required.

Presentations: want science and model development presentations. Leaning towards science in posters and oral presentations more likely to be model development/software development. Each WG will be given a small number of oral presentation slots. Want to make talks as relevant as possible to entire community. Also would like a fun activity to build team spirit. Like COSIMA who went sailing.

Push for model development/software is from workshop committee. All WG have meetings on the same day, there will be overlap in working groups. Difficult to solve.

Poll who is attending? Who attend ESM WG day? Who wants to present on WG day? Who is planning on attending a working group meeting, and which one?

@Aidan organise poll.

Could have science talks during WG meeting. Discuss large experiments as a group.

If have ideas reach out.

@wilma will attend Program Committee meeting on 9th June.

Ancillary file work

UM Ancillary file introduction from @MartinDix.

ESM WG UM Ancillary Martin Dix

Slides: Ancils_ESM_WG.pptx (794.9 KB)

And a presentation from @atteggiani

ESM WG Davide Marchegiani June 2023

@paulleopardi is documenting existing ancillary files at UK Met Office wiki (account required)

https://code.metoffice.gov.uk/trac/TI/wiki/SIDAtNCI

Perhaps have a dedicated session to walk through an example? Moving Australia is a an example we could do. No general tool available. Organise a special meeting in July?

@paulleopardi Is HadCM3 a useful example?

http://www.paleoclim.org/methods/

@dkhutch Yes Paul Valdes has done these kinds of changes extensively for the HadCM3L model. It might be a good idea to ask him for his scripts (if he is willing to share) for comparison. Pretty much all the Bristol paleo simulations are using scripts from Paul Valdes to generate their boundary conditions

@atteggiani worked through example of altering vegetation ancillary using his modify_ancil tool.

@martindix: Anything that doesn’t change the land-sea mask are fairly straightforward.

@dkhutch: Confusing number of orography components in an existing ancillary files. Looked like more than one land-sea mask variable. Need more information about which variables are used.

@Dietmar_Dommenget: Big question is how do we change the land-sea mask. No idea what the timeline is. @MartinDix: atmosphere could be done in a week, not sure about the ocean side.

@Katrin: know what we want to do with topography and vegetation, ocean bathymetry and land-sea mask. Would provide. Question is how to translate them. Not everything UM needs we don’t have, e.g. standard deviation of orography. @MartinDix: sub-grid scale orography and mapping paleo onto CABLE vegetation type. @LaurieM has done changes in vegetation without problems. Did it for the last interglacial. Can change the files that are there. Should be able to change topography by merging with existing file.

@MartinDix: Opening and closing a strait should be straightforward.

@sofarrell: Will need to make sure ocean climatology works with new bathymetry. May need long ocean spin ups.

@paulleopardi Perhaps changes can be done to the MASTER files and then the ancillaires re-genrated to make them consistent? There is a controlled vocabulary for the fields. See Met Office Codes Registry : um for the fields metadata.

Make a hands-on meeting to work through how to do land/sea mask changes in ACCESS models. @dkhutch Put something on the forum. Minimal perturbation to land-sea mask for ESM-1.5 as an example. See that procedure written down.

@MartinDix Will set up an example. Maybe close Bering Strait and open Panama Strait to show examples creating and destroying ocean cells.

Could do training on this on training day for Workshop, or ESM WG meeting.

Science talk

Ran out of time. Move Eun-Pa talk to next week.

This is a wiki post , if you want to update any of the details in these meeting notes, or to add your own recollection of what was discussed then edit me