model output SST different from the prescribed

[Noah Zhao]

I looked at a run's prescribed SST anomalies and model output TS anomalies (ocean grids only). I noticed that they are different; the structures are largely the same, but the values have hemispheric shifts compared to the prescribed SST anomalies. I'm aware that there's a diddling procedure for prescribed SST fields, but this doesn't fully explain the displacements of spatial peaks. I have examined mutiple runs and they all look like this.

Does anyone know about this? If there's a step that CESM does this, may I know how to turn it off?

 

[sacks]

I will probably move this to a different forum where it may get more attention. Can you please tell me what compset you're running?

 

[Noah Zhao]

I will probably move this to a different forum where it may get more attention. Can you please tell me what compset you're running?

Thanks! It's the FHIST compset.

 

[asphilli]

Just to be clear: Are you saying that the SST field passed to CAM (let's call it dataset B) does not match the output TS field (dataset C) over 100% ocean grid points? If so, this is to be expected. The diddling routines modify a provided SST field (let's call the original field dataset A), so that what you get out of the model in the TS array (C) = what you put into the diddling routines (=A).