Search found 7 matches

by leighton
Mon Oct 24, 2016 4:39 pm
Forum: ROMS Discussion
Topic: ROMS Nest Boundary problem
Replies: 3
Views: 1629

Re: ROMS Nest Boundary problem

Adding #define ONE_WAY to your 'application'.h file where you defined NESTING will limit the nesting to one-way coupling. The will not correct issues associated with poorly defined metrics or inconsistent bathymetry. I suggest it as a means of bypassing this unresolved issue https://www.myroms.org/f...
by leighton
Mon Oct 24, 2016 3:07 pm
Forum: ROMS Discussion
Topic: ROMS Nest Boundary problem
Replies: 3
Views: 1629

Re: ROMS Nest Boundary problem

Your errors look similar to ones I recently encountered while using two-way coupled in deep water. There are a several things that should be checked, including the consistency of the metrics between grids and consistency of the bathymetry. Check the suggestions made to me by John Wilkin in https://w...
by leighton
Fri Oct 14, 2016 9:36 pm
Forum: ROMS Bugs
Topic: Error in Flux Integrals in Correct_Tracer - two-way nesting
Replies: 1
Views: 5431

Error in Flux Integrals in Correct_Tracer - two-way nesting

I've been struggling with a deep water :arrow: two-way nesting issue and after a few false starts I have followed the problem to and into the correct_tracer_tile routine in nesting.F. The fine grid flux integrals in correct_tracer_tile do not properly account for the coarse grid time interval. Corre...
by leighton
Wed Sep 21, 2016 2:03 pm
Forum: ROMS Discussion
Topic: Difficulty with two-way deep water nested grids
Replies: 5
Views: 2398

Re: Difficulty with two-way deep water nested grids - update

I continue to have difficulties with two-way coupled nested grids, but with John Wilkin's guidance have been able to clarify a few things. The inputs are derived from an NCOM run, Atmospheric inputs derived from WRF and Gebco bathymetry. 1. I've confirmed smoothness of bathymetry at and near the nes...
by leighton
Wed Sep 07, 2016 6:00 pm
Forum: ROMS Discussion
Topic: Difficulty with two-way deep water nested grids
Replies: 5
Views: 2398

Re: Difficulty with two-way deep water nested grids

John, Thanks for the suggestions. I'll follow up on them. I believe the code used to interpolate from the the original single domain case to the nested case was based on d_roms2roms.m. I do have a question on the the output file 'fort.300'. What is acceptable error magnitude for mass conservation? T...
by leighton
Wed Sep 07, 2016 1:14 pm
Forum: ROMS Discussion
Topic: Difficulty with two-way deep water nested grids
Replies: 5
Views: 2398

Re: Difficulty with two-way deep water nested grids

Thanks for the reply. I thought about the initial transient. I ran the synchronized case as a way of discriminating between the IC issue and a possible time stepping issue associated with 2-way coupling in deep water. If it was an initial conditions problem, I believe the waves should have appeared ...
by leighton
Tue Sep 06, 2016 9:11 pm
Forum: ROMS Discussion
Topic: Difficulty with two-way deep water nested grids
Replies: 5
Views: 2398

Difficulty with two-way deep water nested grids

We are trying to run ROMS in a well resolved nested deep water (h ~ 5000m) configuration and have encountered a difficulty. We are using three nested grids at a grid ratio of 1:3. On the coarsest grid, dx ~ dy ~ 800m while at the finest dx ~ dy ~ 89m. The initial condition is derived from NCOM and t...