ESM1.6 Spin-up experiments

Introduction

CSIRO and ACCESS-NRI have developed, configured and ran the ESM1.6 spin-up experiments for the upcoming cmip7 contribution.

This thread is intended to document the exact model executables and forcings used for the esm1.6 spin-up experiments (previous example). In particular, changes to the executables, bug corrections and updates can also be documented here.

Name: pi_concentrations
Years: 0-222
GitHub repo: GitHub - ACCESS-NRI/access-esm1.6-configs: Standard ACCESS-ESM1.6 configurations released and supported by ACCESS-NRI
Exe versions: access-esm1p6/pr27-5
Inputs: /g/data/vk83/configurations/inputs/access-esm1p5/ … /g/data/vk83/prerelease/configurations/inputs/access-esm1p6/ …
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: Spin-up run with the 1 degree ACCESS-ESM-1.6 with 650 years continuous run (as of writing)
Simulation started: 20th December 2024 (all run on Gadi)
People: Pearse Buchanan (@pearseb), ?
Linked articles:
Years: 222 - 272
Exe versions: access-esm1p6/pr31-1
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: WOMBAT-lite code updated with sinking bugfix. Updated to dev_2025.01.0
Other notes:
People: Pearse Buchanan (@pearseb), ?
Years: 272 - 352
Exe versions: access-esm1p6/pr31-3
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: Updated WOMBAT-lite to dev_2025.01.2 - details?
Other notes:
People: Pearse Buchanan (@pearseb), ?
Years: 352 - 653
Exe versions: access-esm1p6/pr31-3
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: At restart 352, we replaced the ALK, DIC, NO3 and O2 tracers with their values from depth indices 15:50 with those from the restart file located here: /g/data/vk83/prerelease/configurations/inputs/access-esm1p6/modern/pre-industrial/restart/2024.12.10/ocean
Other notes:
People: Pearse Buchanan (@pearseb), ?
Years: 653 - 666
Exe versions: access-esm1p6/pr31-3
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: At restart 653, we replaced the Fe (iron) tracer with values from depth indices 15:50 with those of the restart file in: /g/data/vk83/prerelease/configurations/inputs/access-esm1p6/modern/pre-industrial/restart/2024.12.10/ocean
Other notes:
People: Pearse Buchanan (@pearseb), ?
Years: 666 - 678
Exe versions: access-esm1p6/pr31-3
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: At restart 666, we increased the scavenging of iron onto particles by an order of magnitude from kscav_dfe = 0.0001 to kscav_dfe = 0.001. This was done in the hope that excess Fe building in the ocean interior will be removed.
Other notes:
People: Pearse Buchanan (@pearseb), ?
Years: 678 - current
Exe versions: access-esm1p6/pr31-3
Outputs: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Restarts: /scratch/p66/pjb581/access-esm/archive/pi_concentrations-expt-c55f7217
Brief description: At restart 678, we increased the remineralisation rate coefficient (detlrem) from 0.4 to 0.5 (by 25%) to maintain more organics in the upper ocean, elevate productivity, but also reduce deoxygenation in the deep. This may not be enough, but just trying it right now.
Other notes:
People: Pearse Buchanan (@pearseb), ?

For further run details, the payu experiment configuration folder with associated run commits is here. See important_run_details.txt for further details.