Using ww3_uprstr to update the unstructured restart files

[Liu-Jincan]

Is it possible to update restart files using ww3_uprstr when the grid is unstructured? I have seen only two grbtxt format in the ww3_uprstr.F90, and I think they are not suitable for the unstructured restart files. Any suggestion is helpful. Thanks.

[JessicaMeixner-NOAA]

Great question! I don't believe ww3_upstr has ever been tested for unstructured grids, but I suspect it could be updated to use them with a few modifications.

[Liu-Jincan]

Thanks. I am not familiar with the variables in the ww3_uprstr.F90, but I wll have a try.

[flampouris]

The data in the grbtxt is a column following the order of the restart file.

As long as the grid info from the restart file of the background is used to export your analysis, the uprstrt.ftn subroutine can be used as is.

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If you permit one question, do you run DA on an unstructured grid?

[Liu-Jincan]

Yes. I really want to assimilate the observations into the unstructured grid wave model.

[sunleqiang]

The data in the grbtxt is a column following the order of the restart file.

As long as the grid info from the restart file of the background is used to export your analysis, the uprstrt.ftn subroutine can be used as is.

If you permit one question, do you run DA on an unstructured grid?

I think the real challenge is not in ww3_uprstr, but in the DA algorithm. For example, the calculation of the distance between observation and target analysis grid point might be tricky in unstructured grid.

[aronroland]

There is no assimilation in ww3 for unstructured grids ...

[flampouris]

There is no assimilation in ww3.-

[aliabdolali]

Sofar Ocean has developed DA for ww3, and we were envisioning expanding it to our applications
See this paper
https://doi.org/10.1029/2022GL098973

[aronroland]

great!--Sent from my Android phone with GMX Mail. Please excuse my brevity.On 4/4/23, 2:22 AM "Ali.Abdolali" ***@***.***> wrote: Sofar Ocean has developed DA for ww3, and we were envisioning expanding it to our applications See this paper https://doi.org/10.1029/2022GL098973 —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you commented.Message ID: ***@***.***>