Ocean Modeling Discussion

Yes, old netcdf files had a 2 GB limit. You can make a bunch of under 2 GB files and ask ROMS to read from one, then the next, then the next. Or you can convert them to a newer netcdf format (possibly even with compression) and concatenate them into one file. Hi Kate, Following your suggestion, I h...

Your question is kind of weird. What do you mean by high-frequency tidal forcing? ROMS has its own tidal forcing file specified in TIDENAME . The tidal forcing file doesn't have a time coordinate but a tide angular period for each constituent. Therefore, a single file is required. This data is deri...

Dear all, I recently tried to carry simulation with multi bry files. I have 5 bry files with high-freq tide forcing, with each file containing 20-day forcing data. It seems that the model can well recognize all the bry files and run for 100 days, as I found in the output file. However, I found that ...

Dear all, Now I am using the roms simulating internal tides. In order to avoid reflection at the boundary, I have tried to set a sponge layer within the grd file and the .in file. The sponge layer was set with gradually increasing diff and visc factors. However, I didnt see much difference between t...

Yes, old netcdf files had a 2 GB limit. You can make a bunch of under 2 GB files and ask ROMS to read from one, then the next, then the next. Or you can convert them to a newer netcdf format (possibly even with compression) and concatenate them into one file. Hi Kate,thanks very much. I'll try to s...

dear all, is there anybody using the rnc tool box to make preprocessing files for ROMS simulation, As I want to simulate the internal tide, I need to make a really large boundary files (hourly). I am using the rnc matlab box to create the bry file. however, when I try to make a file larger than 2g, ...

Thanks, Wilkin! I actually calculated the ubar1 and vbar1 as you mentioned, I will double check my matlab script.

Hi all, I am now doing simulation of internal tides using ROMS. I got a problem of the output 2-D brotropic velocity ubar and vbar. I have calculated the barotropic velocity using the output 3-D u v, call it ubar1 and vbar1. However, the values of model output ubar vbar and calculated ubar1 vbar1 ar...

You show before and after. What you need is a timeseries of total energy to see if you are approaching a steady-state. I'm not surprised that your ROMS grid supports sharper fronts than what came from SODA. What I don't know is the spin-up time for getting to steady-state. Or perhaps it will go uns...

Hi all, I want to get a stable velocity field of the South China Sea, and I tried the below scheme: I used the SODA data (u,v,t,s,sla) as initial field; the boundary is set to time-invariable for 0:1:29(days); the forcing is also set to time-invariable (0:1:29). with the above scheme, I wanted to ge...

I think your problem is this combo: LtracerSrc == T T ! SSFNAME == ocean_rivers.nc You are saying that you want river sources for the tracers and yet you commented out the river filename. Hi kate， I tried to change the LtracerSrc= F F and the errors occured as follow: CHECKDEFS - cannot use obsolet...

Yes, that is the trunk version of the code. Are you still getting the same error? Do you have a file listed for each filename in an unmodified ocean.in or did you comment some out? Yes,the error is still the same.I am sorry I forgot to attach my new ocean.in file.I cant find the file which listed t...

Yes, that is the trunk version of the code. Are you still getting the same error? Do you have a file listed for each filename in an unmodified ocean.in or did you comment some out? Yes,the error is still the same.I am sorry I forgot to attach my new ocean.in file.I cant find the file which listed t...

You have: FRCNAME == ./SCS_forcing/SCS_TIDE28-forc.nc Try getting rid of the comment after the filename. Also, the date on your ocean.in file is 2013. You need to use a 2015 ocean.in with a 2015 ROMS. Your ocean.in has NBCFILES, which isn't in the trunk ROMS - are you using trunk ROMS? Hi kate， I d...

The problem is in your ocean_SCS.in file. After listing the grid file, my job output lists the forcing files. What do you have for NFFILES? Did you keep the FRCNAME section? It's good to have NFFILES at least 1 and to have something for FRCNAME. There are times when ROMS wants a field from the forc...

hi everyone, I am a new leaner of Roms.I run the oceanM after,and I got the problem as flow: Output/Input Files: Output Restart File: ./SCS_results/SCS_rst.nc Prefix for History Files: ./SCS_results/SCS_his Output Averages File: ./SCS_results/SCS_avg.nc Input Grid File: ./SCS_forcing/SCS_BIG-grd.nc ...