Script to generate ensemble IC's

[guillaumevernieres]

Issue: Atmosphere Component Uncertainty

I'm not sure about how to proceed with the atmosphere component. @CatherineThomas-NOAA, could you provide some guidance?

Task

Develop an application that performs the following tasks:

Input:

• Deterministic ocean and sea ice restart files
• Ensemble size
• B-matrix

Output:

• Structured deterministic and ensemble initial conditions (ICs). The ensemble ICs are copies of the deterministic ICs.
• Ocean increments generated by randomizing the B-matrix.
• Directory structure: Ensure that the output generates a directory structure that aligns with the requirements of the 1/2 cycle to start.

[AndrewEichmann-NOAA]

Couldn't this use ufs_utils, at least on the atmospheric side?

[guillaumevernieres]

Couldn't this use ufs_utils, at least on the atmospheric side?

I have no idea @AndrewEichmann-NOAA , but I'm pretty sure the tools to do this for the atmosphere already exist.

[CatherineThomas-NOAA]

@AndrewEichmann-NOAA is correct. The UFS_UTILS utility gdas_init will produce cold start ICs for the atmosphere. It will create the directory structure expected by the global-workflow for both the deterministic and ensemble. @guillaumevernieres I can provide more details if needed.