Ocean Modeling Discussion

pressure gradient: the averaged value tends to the instantaneous value as the averaging period tends to zero, six-hourly averages may not be much different than the instantaneous value you need. you can hack the code to not average pressure: you can compute the pressure by integrating density (comp...

Dear users, Maybe I'm asking a stupid question, but I still can't figure out a good way to determine it after reading some posts. This is because I am asking to solve the kinetic energy budget equation, but the pressure or pressure gradient in the equation is not known to me. So what I am asking is ...

Hello, everyone I found that if I start the wrf-roms simulation a few days before a tropical cyclone appears, the tc path shift is very strong. So can the simulation only be started at the beginning of the cyclone? I see that the sandy case of coawst also starts at the beginning of the cyclone. Is t...

Hello, colleagues I am running a simulation and find that the simulation below up immediately after defining NONLIN_EOS. I tried to circumvent the problem by shortening the dt, but the problem was not solved. The simulation continues when NONLIN_EOS is not defined, i.e. when using linear density cal...

This is the log file.

Hello everyone, When I plotted the roms output file, I found that the temperature difference was particularly large. The graph at the initial moment should be normal. However, after the simulation calculation, the temperature dropped sharply in the following moments. After a few days of simulation i...

Dear Dr Wilkin,
Thank you very much for your help. I have solved this error. Referring to this post, after I modified the boundary file and dt, it works fine. viewtopic.php?t=4455

You haven't #define MASKING Dear, wilkin Thank you for your reply. I modified the h-file section and compiled it, but I still get the same error. I don't understand why the error section TIME-STEP in the output file is so huge. And I don't have NAN in all input files, but KINETIC_ENRG and TOTAL_ENR...

Thank you for your reply. Is it possible if I replace nan with 0 in the file? And will roms do the screening operation based on mask? Yes, zero values (any finite value) in the land should solve your initialization problem. Then the masks will be applied - zero times anything finite is zero. ROMS r...

You can't have NaNa in any input fields, not even in the area masked as land. ROMS computes on all points and then applies the 0/1 land mask afterward. Zero times NaN is NaN, so they won't go away. Your log reports that both forcing and boundary data were read for initial time 2019-08-01 00:00:00.0...

Hello, everyone I'm having 2 problems running roms, hope someone can help me out. The first is whether the time step of the drive field file and the boundary file are inconsistent, which will lead to an error in the calculation result. The second is whether nan in temperature and salinity in the ini...

Your file output.txt indicates that the ERA5 forcing data were read successfully. The next thing ROMS is doing when the error occurs is reading the open boundary conditions file, and the first variable it reads is zeta, so that's why you are getting an error about zeta_time. The log says your Input...

The netcdf files created by roms_write_era5_NCARds633_frcfile.m have a time coordinate variable called "time" (not zeta_time) and the "time" attribute of all variables will point ROMS to read "time" in preference the default in varinfo.dat. But, I can't imagine what me...

I wrote that code long ago and have not updated from ERA-Interim to ERA5. You will have to figure out the accumulation logic yourself, if indeed that is still how the data are presented (it may not be, check the units). I now access ERA5 from the NCAR Research Data Archive using roms_write_era5_NCA...

From what I could gather, the problem might be that your forcing fields grid is inconsistent with your model grid. Your model grid appears to be defined in cartesian coordinates: ANA_GRID - x-location of RHO-points: x_rho (Grid = 01, Min = -5.00000000E+02 Max = 8.35000000E+04) ANA_GRID - y-location...

jbettencourt wrote: ↑Tue Sep 20, 2022 11:52 am Can you post the log file?

This si my log file.

GET_2DFLD_NF90 - error while reading variable: Uwind at TIME index = 8 I think this means that the error is with the Uwind variable data in the file. I'm sorry I left a little bit out, but it's related to the grid.But how to deal with that? The latitude and longitude of my bulk file is shown below....

[/code] Your units attribute should be like "days since 1980-01-01 00:00:00", so that the model can have a reference time from which to count the time units. In the input file, you should set TIMEREF to an appropriate reference time, that could be the same as the one in the forcing file, a...

Your units attribute should be like "days since 1980-01-01 00:00:00", so that the model can have a reference time from which to count the time units. In the input file, you should set TIMEREF to an appropriate reference time, that could be the same as the one in the forcing file, and then...

Hi, It seems you need to check two things: In your forcing file, the units attribute of the time variable to see if it matches with the time data. In your input file, the initialisation time of the model, that is the value of TIMEREF and DSTART. Hello, In my forcing file, the units attribute of the...

Hello, I'm having a problem running ROMs, which tells me that there is a problem with the timing. The driver field file I use is CFVR data, and the time is datenum(NECPTime-1980010100:00:00). Do I need to convert it into ROMS readable time? How do I set it? MULTIFILE_INFO_S2D - Error while processin...

Thank you for your advice

Hi, I want to use ROMS for one month simulation, and I made the relevant NC file using crocotools, but the following error appears after execution, I checked blk.nc and found that there is no variable wind_time and cycle_length related properties. GET_CYCLE_NF90 - unable to get value for attribute: ...

Thank you very much for your answer, it helped me solve my doubt.If I have any more questions, I will choose to go to GitHub to ask.

In other words, as long as I can compile successfully to produce coawstM, that's equivalent to romsM compiling successfully, right?

Thank you for your reply.

Dear all, I tried to compile in the ROMS module in COAWST, but the following error occurred： svn: E155007: '/public/home/sunjiacheng/coawst_test/COAWST-master' is not a working copy svn: E155007: '/public/home/sunjiacheng/coawst_test/COAWST-master' is not a working copy rm -f -r core *.ipo /public/h...