dt
The CCAM pd60_run.sh or run_ccam.py scripts should automatically determine the appropriate time-step for the CCAM model. Below is a list of example time-steps for a given simulation resolution that are typically used by CCAM. Note that the recommended time-step, dt, is specified as a factor of 1 hour.
| Required simulation resolution | Recommended CCAM time-step dt |
|---|---|
| >= 60 km | dt = 1200 secdt = |
| >= 45 km | dt = 900 secdt d |
| >= 36 km | dt = 720 sec |
| >= 30 km | dt = 600 sec |
| >=18 km | dt = 360 sec |
| >= 15 km | dt = 300 sec |
| >= 12 km | dt = 240 sec |
| >= 9 km | dt = 180 sec |
| >= 6 km | dt = 120 sec |
| >= 5 km | dt = 90 sec |
| >= 4 km | dt = 80 sec |
| >= 3 km | dt = 60 sec |
| >= 2 km | dt = 40 sec |
| >= 1 km | dt = 20 sec |
| >= 500 m | dt = 10 sec |
| >= 200 m | dt = 4 sec |
| >= 100 m | dt = 2 sec |