# CSIRO - ACCESS-NRI standup minutes

**URL:** <https://forum.access-hive.org.au/t/csiro-access-nri-standup-minutes/3789>\
**Category:** CMIP7 development\
**Created:** [14 October 2024 04:20 UTC](https://forum.access-hive.org.au/t/csiro-access-nri-standup-minutes/3789 "2024-10-14T04:20:05Z")\
**Posts on this page:** 1\
**Showing post:** 85

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**Author:** ![anton](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/anton/32/1836_2.png) [@anton](https://forum.access-hive.org.au/u/anton)\
**Post date:** [7 April 2026 01:33 UTC](https://forum.access-hive.org.au/t/csiro-access-nri-standup-minutes/3789/85 "2026-04-07T01:33:47Z")

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**7 April**

Aidan, Anton, Paul, Jhan, Lachlan, Martin, Claire, Rachel, Dougie, Pearse

**New control runs with time profiles updated**

- Restarted piControl+concentrations & emissions, from old year 200, and set back to 1. (So have upset the leap year sequenc)

- Appears to have changed answers over restarts in piControl+emissions ?

- Jhan to create an issue with exact configs compared

Some candidates:

- possibly spack 0.22 to 1.1 wasn’t reproducible
- check determinism over first 4 years - does this appear in 4th year? then it’s due to leap years

**Nitrogen v2**

No obvious impacts in Rachel’s analysis - we don’t know what we don’t know about it yet though (of course)

We like Nitrogen v1, but possibly this would be inconsistent with forcing in Scenarios - so as there apepars to be no impact, well update piControl+emissions to v2 (and all historical and all scenarios) - Does this make comparison between +emissions and +concentrations harder ?

Jhan will also start a parallel run with piControl+concentrations with Nitrogen v2 - spencer will make a restart for this.

**Emissions driven historial**

- Trying to understant initial wood product pool size
- There is some drift in CO2 in piControl, is this important for choosing start year for ensembles ?

**Ensembles** : - planned for 10-30 realisations of emissions-driven historical experiments and scenarios

Aidan stresses pushes payu **runlogs** to github.

See [How to preserve reproducibility when applying perturbations in the event of a numerical instability crash - #8 by Aidan](https://forum.access-hive.org.au/t/how-to-preserve-reproducibility-when-applying-perturbations-in-the-event-of-a-numerical-instability-crash/411/8) for committing when doing a pertubation.

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