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SST restoring

U

ucas_qs

qiushi Zhang
Member
eclare@lanl_gov said:
Hello Marte,
The restoring capability just nudges the SST back toward the data values. In stand-alone mode with the slab ocean parameterization turned on, the model calculates SST based on the forcing balance at the sea surface and under the ice; restoring pushes the SST back toward the data values and can completely replace the SST value if that's what is needed. It's important for the sea ice only to the extent that ocean heat affects the sea ice evolution, and so it can either help make more ice or melt it back more, depending on what direction (positive or negative) the calculated bias is. Restoring has a long and colorful history in the ocean modeling community; that's the place to look for further information on how/why it works. Whether you need to use it, and if so, how to set it up will depend a lot on your particular configuration -- the atmospheric and oceanic forcing you use will largely determine the SST bias in the Icepack-calculated value. The restoring time scale determines the strength of the nudging and thus how quickly the SST heads toward the data value (e.g. it can be instantaneous). That said, we do not recommend using either Icepack or CICE in stand-alone mode because many coupled feedbacks are critical. We intend that configuration to be used mainly for software testing.
Best wishes,
Elizabeth
Click to expand...
Hello Elizabeth,
I would like to use CESM2 to conduct coupling experiments and restore SST in some areas, but I have not found relevant instructions or guidance so far, I hope you can provide some help, looking forward to your reply.
 
D

dbailey

CSEG and Liaisons
Staff member
This is kind of similar to pacemaker runs that were done awhile ago. Instead of replacing SST in POP, you would replace the SST in the DOCN-SOM. Basically, this is not a standard supported mode. One needs to start from the E compset and edit the docn_comp_mod.F90 to override the SOM SST and replace it with a specified dataset.

Here is some information on the pacemaker experiments.

CESM Climate Variability & Change Working Group

CESM Climate Variability & Change Working Group Simulations
www.cesm.ucar.edu www.cesm.ucar.edu
 
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