DOI-USGS / DOI-USGS/COAWST

DIA speed problem

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Dominant language
Fortran
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Description

Hello everyone. Recently I have encountered with the model blow up issue. I want to couple wrf and roms using coawst (MCT) and add tidal forcing.

(060,001,15) 5.427886E-04 5.660677E-03 1.218054E-01 3.795880E+00
5620307 57204 05:56:45 9.673046E-02 1.910431E+02 1.911399E+02 3.580927E+12 02
(061,001,01) 4.058363E-01 6.268342E-04 3.180872E-02 1.047281E+02
DIAG speed trouble 104.728058795653

Blowing-up: Saving latest model state into RESTART file

DIAG speed ijk 148.106779056467 61 1 1
2
WRT_RST - wrote re-start fields (Index=1,2) in record = 0000003 01

Blowing-up: Saving latest model state into RESTART file

WRT_RST - wrote re-start fields (Index=1,2) in record = 0000003 02

Elapsed CPU time (seconds):

I have checked the points where abnormal speeds occur. Here are the specific plots for the rst file and the v variable. However, in the plot, it appears that only one point in the u variable exceeds 100. What should I do to address this?

![image](https://github.com/DOI-USGS/COAWST/assets/113485155/a17748e4-63e7-4201-bd1c-9e553a03a17c)
![image](https://github.com/DOI-USGS/COAWST/assets/113485155/88d138e8-bb45-4339-a095-3205a726428c)

[run_0315.txt](https://github.com/DOI-USGS/COAWST/files/14610465/run_0315.txt)
[ocean_sandy.txt](https://github.com/DOI-USGS/COAWST/files/14610468/ocean_sandy.txt)
[sandy.txt](https://github.com/DOI-USGS/COAWST/files/14610469/sandy.txt)

Contributor guide

Open the contributing guide

Research direction

Start by reviewing run_0315.txt, ocean_sandy.txt, and sandy.txt alongside the reported restart output and plots. Reproduce the WRF–ROMS COAWST run with tidal forcing, then investigate the reported abnormal speed and model blow-up; done means identifying a supported configuration or concrete cause that prevents the instability.

Written by the indexing model from the issue text.

Assessment

Tech stack
fortran
Domain
hpc
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
15/100

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