RAPID-Evolution

Global eORCA025 configurations with ¹/₁₂° and ¹/₃₆° nests centred over the RAPID array latitudes in the North Atlantic.

Quick start on {Archer2|Anemone}

git clone [email protected]:NOC-MSM/RAPID-Evolution.git 
cd RAPID-Evolution
./setup {-s Archer2}

The setup script downloads nemo, compiles tools and configurations. Setup defaults to Anemone (the NOC's HPC system), which is ideally suited for fast development/turnaround of smaller configurations (e.g. eORCA025). For larger configurations it is recommended to switch to Archer2.

The global eORCA025 and nested eORCA025-RAPID12 and eORCA025-RAPID12-RAPID36 configurations are ready to run. All that is required is:

cd nemo/cfgs/GLOBAL_QCO/eORCA025

sbatch run_nemo1326_24x_v2.slurm                      (Anemone)

cd nemo/cfgs/AGRIF_QCO/eORCA025-RAPID12

sbatch run_nemo1326_24x_v2.slurm                      (Anemone)

cd nemo/cfgs/AGRIF_QCO/eORCA025-RAPID12-RAPID36

sbatch run_nemo1326_24x_v2.slurm                      (Anemone)
sbatch run_het_nemo1326_96x_27n_a2.slurm              (Archer2)

There are a few variables to set in the runscript. For example, the following variables will generate a 2-hour simulation split in 1-hour jobs.

# ========================================================
# PARAMETERS TO SET
# Restart frequency (<0 days, >0 hours)
FREQRST=1
# Simulation length (<0 days, >0 hours)
LENGTH=2
# Parent initial time step (0: infer from time.step)
# PARENT_IT000 != 0 -> auto-resubmission is switched OFF
PARENT_IT000=0
# Name of this script (to resubmit)
SCRIPTNAME=run_nemo.slurm
# =======================================================

Submitting on Archer2

Production Simulations larger than eORCA025 are best done on Archer2.

Change directory to the NEMO experiment directory:

cd nemo/cfgs/AGRIF_QCO/eORCA025-RAPID12-RAPID36

For the eORCA025-RAPID12-RAPID36 configuration there are currently two tested runscripts:

sbatch run_het_nemo1326_96x_27n_a2.slurm              (Archer2)
sbatch run_het_nemo3796_96x_46n_a2.slurm              (Archer2)

On 46 nodes eORCA025-RAPID12-RAPID36 completes around 3 SYPD, excluding queueing time.

Available Configurations:

Global eORCA025

Resolution:

• Horizontal: 1/4°
• Vertical: 75 levels

Global eORCA025-RAPID12

Resolution:

• Horizontal: 1/4°
• Vertical: 75 levels
• 1/12° AGRIF nest extending over 6°N-42°N

Global eORCA025-RAPID12-RAPID36

Resolution:

• Horizontal: 1/4°
• Vertical: 75 levels
• 1/12° AGRIF nest extending over 6°N-42°N
• 1/36° AGRIF nest extending over 19°N-31°N

Ancillary files:

The ancillary files are accessible via the JASMIN Object Store. For external users they are accessible (read-only) over HTTP using the URL prefix https://noc-msm-o.s3-ext.jc.rl.ac.uk/rapid-evolution-ancillaries/.

Administrative notes:

The RAPID-Evolution repo is forked from NOC_Near_Present_Day, with the NPD repo added as upstream:

git remote add upstream [email protected]:NOC-MSM/NOC_Near_Present_Day.git

This means that RAPID-Evolution can be synced with progress on NOC_Near_Present_Day. See:

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork