Ocean Modeling Discussion

We are hiring a Postdoctoral Fellow: Physical Oceanographer- Regional Ocean Modeller at UNSW Sydney. The role involves research into the dynamics and prediction of the East Australian Current as part of a project funded by the NSW state government. The candidate will work on the South East ...

We are advertising for a Postdoctoral Fellow in Oceanography and Ocean Modelling to join our Coastal and Regional Oceanography team in the School of Biological, Earth and Environmental Sciences at UNSW Sydney. We are looking for a skilled ocean modeller to support the development of ocean modelling ...

Hernan et al., I have been applying a sponge layer via the recommended approach of writing the nondimentional spatial distribution arrays "visc_factor(i,j)" and "diff_factor(i,j)" into the grid NetCDF file. This works fine for the NLM_DRIVER and VERIFICATION runs, however I have found that for the ...

Hello, I have been having various issues with a ROMS I4DVAR configuration. The configuration is for a recent 5 month period, but is based on previous configurations that worked well. I have run a 5-month VERIFICATION run and all looks good and as expected. When I run the very first cycle of the ...

Ahh OK thank you. I did this as the Gui was so much easier, then I copied to the Linux machine. Which I now realise is incorrect. I have now downloaded the code from the terminal and checked out the required version, and all is compiling well. Thank you. git clone https://www.myroms.org/git/src ...

Hello, When I compile I get the following error. Clean previous scratch build svn: E155007: '/scale_wlg_persistent/filesets/project/mocean03108/roms_src/trunk' is not a working copy svn: E155007: '/scale_wlg_persistent/filesets/project/mocean03108/roms_src/trunk' is not a working copy rm -f -r core ...

The Zgrid values in my obs file are all between 1-50 where nlayers=50, and the depth values are all 0 or less (0 or negative). From the ROMS code I cannot see how it is then possible that the Zgrid values in the obs file are being overwritten. When I have run similar VERIFICATION runs in the past ...

Thank you for your help. I have double and tripled checked and I believe my Zgrid and depth values are correct. Yet the observations are still being rejected. Is there a way I can find out why ROMS is rejecting the obs? I see that they are rejected in the log file but cannot figure out why. They are ...

Hello, I am seeing some unusual behaviour with Zgrid when running VERIFICATION. When I kick off the VERIFICATION run, the input observation file is altered. It then has incorrect Zgrid, so the observations are rejected and hence incorrect values are output to the mod file (NLmodel_value output in ...

Hello, I am seeing some unusual behaviour with Zgrid when running VERIFICATION. In my input obs.nc file I have Zgrid=50 and depth=-2 for SST obs (my model has 50 layers). When I run the VERIFICATION, the obs file is written to and altered. For the first day (of 6 daily times for which I have SST ...

I am trying to compile to perform adjoint sensitivity analysis with #define AD_SENSITIVITY. I am able to compile with #define NLM_DRIVER successfully, but when I try to compile with #define AD_SENSITIVITY I get the following error. /home/ckerry/adjoint_sens_analysis/runs/build/ocean_control.o: In ...

Hello, When running ROMS I am getting the following error. I'm wondering if anyone knows what it means and how I might debug it. [gadi-cpu-clx-2186:757301:0:757301] Caught signal 11 (Segmentation fault: address not mapped to object at address 0x200) ==== backtrace (tid: 757325) ==== 0 ...

Hi, I'm wondering if anyone can help with the following error in the descent algorithm when using IS4DVAR? I get the following error, repeated several times in the run log file. <<<< Descent Algorithm >>>> CG_DELTA not positive. CG_DELTA = -3.936643675943532E+035 , outer = 1 , inner = 1 CG_DELTA not ...

Hi,
Just wondering if either of you solved this issue?
Thanks

Hi, I'm also wondering if you solved this problem and I am having the same problem. <<<< Descent Algorithm >>>> (001,000): Initial gradient norm, Gnorm = NaN ..... TLM: GET_STATE - Read state initial conditions, t = 4367 00:00:00 (File: ocean_itl.nc, Rec=0001, Index=1) - free-surface (Min = NaN Max ...

Hi,
I'm wondering if you found the solution to this problem?
I'm having the same error.
Thanks

Thank you.
I did not know that I had to install the Fortran netCDF library and the netCDF C library separately.
I installed netcdf-fortran and now I have netcdf.mod, typesizes.mod and libnetcdff.so as you said, and can compile ROMS!
Thanks so much for your help.

Hi Kate, Thanks a lot for the help. I tried option 3, hacking the ifdef USE_NETCDF4 loop ifdef USE_NETCDF4 NC_CONFIG ?= nc-config NETCDF_INCDIR ?= $(shell $(NC_CONFIG) --prefix)/include/Intel NETCDF_LIBDIR=/apps/netcdf/4.2.1.1/lib/Intel:/apps/netcdf/4.2.1.1/lib LIBS :="-L/apps/netcdf/4.2.1.1/lib ...

I use a recent version of ROMS and netcdf4. My build script uses nc-config to specify the netcdf library files, export NC_CONFIG=nc-config, which had the library and include directories specified as prefix=/apps/netcdf/4.2.1.1 exec_prefix=${prefix} libdir=${exec_prefix}/lib includedir=${prefix ...

Hi, I am having an issue compiling ROMS, to do with the paths to the netcdf library. Firstly I got the error: cp -f /apps/netcdf/4.2.1.1/include/netcdf.mod /home/561/cgk561/eac/normalizations/build cp: cannot stat `/apps/netcdf/4.2.1.1/include/netcdf.mod': No such file or directory cp -f /apps ...

I have had this error message before when my set-up files are in a directory which is several sub-directories away from my home directory eg. /home/subdir1/subdir2/subdir3/subdir4/run By copying the exact same set-up files to a folder /home/run for example I no longer got the error. I don't ...

Hi, I am trying to install ROMS on a Mac following the directions at https://www.myroms.org/wiki/index.php/ROMS_Mac I have downloaded netcdf-3.6.3.tar.gz and extracted it, then from the directory ~/src/netcdf-3.6.3 I execute export FC=gfortran export FFLAGS='-O3' ./configure --prefix=/opt/gfortran ...