Ocean Modeling Discussion

Hi Forum,

I wanted to introduce a temporarily varying "wtype_grid" to the model.

That is, modify the following

double wtype_grid(eta_rho, xi_rho) ;
wtype_grid:long_name = "Jerlov water type index" ;
wtype_grid:coordinates = "lon_rho lat_rho" ;

to as below.

double wtype_grid(ocean_time ...

Hi Dr. Charles,

I installed the GridBuilder.mltbx in Matlab2019B running on an Ubuntu system. I got the following error while trying to initiate GridBuilder. I would be grateful if you can give any suggestions regarding this.

Thanks in advance.



>> GridBuilder
Unrecognized function or variable ...

Hi All,

I want to create a ROMS grid with high resolution near the coast over the area shown in the attached figure. I would be grateful if anybody can suggest that how can I create such grid with varying resolution.

Hi Kate,
As you suggested, I used the serial code to find the wrong file and it was successful :) . There were missing values in one of the data and I replaced that file. Thanks for your suggestion. Now I have another error while trying to use python script for generating tides. I would be grateful ...

Hi Kate,
Thanks for your reply, I am trying as you suggested.

Hi All,

I am getting the following strange error :shock: , while creating boundary files by using PYROMS.
-------------------------------------------------------------------------------------------------------
-2.84543 2.20867
-7.37183 31.0363
RD new flooding
-8.6285 32.3637
RD new flooding
-9 ...

Hi Kate,
Thanks for your suggestion, I could solve the error by specifying the proper scrip weights file for creating boundary files from HYCOM data :) . But I can't figure out how to specify the open boundaries in my domain. My domain is proper north-south, east-west oriented with the southern and ...

Hi Kate,
While trying to create boundary files using make_bdry_file.py script, I got really stuck with the following error :shock:
;-----------------------------------------------------------------------------------------
Creating boundary file /home/skyland/PyROMS/pyroms-master/examples/ASB_HYCOM ...

Hi Kate,
Unfortunately I couldn't find out exactly where I can do "tell scrip that your fields are periodic in x" as you suggested. I am still in learning stage of python and I would be grateful if you can point out this.

Hi, Kate
As you suggested, I commented out that line and similarly couple of other lines and finally pyromstools is working. I was trying to use the script for creating the Boundary condition files from Hycom data. I am facing a problem with the indexing of Longitude for subsetting the equatorial ...

Hi Forum,
I am getting the following disappointing error :( while loading the pyroms package in my Linux system. I have installed all the prerequisites of this package. I reinstalled many times but still i can't figure out what is causing this error. Any suggestions will be helpful

File "/home ...

Hi Kate,
I was trying to use the pyroms tool make_runoff_file.py. But I am not able to figure out some things like how to decide the proper values for the variables "width" and "rspread" in the script. And also in the conservative horizontal mapping, is the runoff volume is conserved ?

Hi Kate,
Thanks for your help. I am trying to replicate your template cdl file. But is there any preprocessing script to create this forcing file?.

Hi Kate,

Thanks for your kind reply. My model is running now, :) I have one more doubt that if I want to switch on the "RUNOFF" option, what should be the structure of the forcing file that I have to provide?. I couldn't find any example cdl file for the runoff forcing file. Is the runoff forcing ...

Hi Kate,
Thanks for your comments, as you suggested, I started with the an input file having these following lines
NCLMFILES == 1 ! number of climate files
NBCFILES == 4 ! number of boundary files
and also the USE DEBUG switched on, but now I am getting the following error ...

Hi forum,
I am getting a segmentation fault error while trying to use the ROMS source code version provided by the following link

https://github.com/kshedstrom
I successfully compiled the model using gfortran, but while trying to run with the following command,

mpirun -np 24 ./oceanM Apps/test ...

Hi Forum,
I was trying to do nesting in my domain. After successfully running the parent domain model. I created a nested high resolution grid inside the bigger domain. My model is blowing up with NaN values in the first time step of FINE2COARSE.

Here I am attaching the log file of my run. I would ...

Hi Kate,
As you suggested, I checked the fluxes, by writing along with the output average files and found that in the region where high salinity is observed, the time-averaged surface net salt flux, (E-P)*SALT: is always positive throughout the year. The following are the maximum and minimum values ...

Hi Kate,
Thanks for your points. I would like to know one more thing with the same model configuration, although it is not under the Post subject. The salinity values in some parts of my domain goes high about 38PSU where the climatological values are about 35PSU when I switch off SRELAXATION and ...

Hi Kate,
Thanks again for your suggestions, I checked my boundary files and found out that there is some unacceptable values for zeta (~10m Maximum). I would change my boundary to analysis products and I am trying towards a realistic hindcast indeed. In that case what could be the reasonable ...

Hi Kate,
Thanks for the reply, Sorry for the missing details. I am using the Boundary files created by Romstools and it derives values of T and S from WOA and calculates zeta, ubar, vbar etc for the boundaries(As I understand!!). Presently I am not using tides in my model. Model blows up with ...

Hi Forum,
In my model domain, there are two open boundaries, in South and East. My model blows up When I use the boundary conditions available for the variables zeta, ubar and vbar. The model blows up with all combinations like Cha,Che for zeta and Shc, Red for 2D momentum. The problem is only for ...

Hi Forum,
I was trying to extend the climatological run to 40 Years whcih was successfully completed for 20 years using ROMS configured for the Indian ocean. Model is initialized using the restart file of 20 year run. Model is blowing after 24 year and 9 months.

The model configuration and ...

Hi,
Thanks Kate. As you suggested I created an external boundary condition file as roms_bry.nc, and changed the option from radiation to radiation with nudging. The model is running now and I will get back to you once it is over.

Thanks again for your support which is really encouraging.
By
Sandy

Hi,
Thanks Kate for your quick reply. As you suggested , I checked the third record of my restart file and realized that the temperature has an abnormal range in my eastern boundary, to be more specific off the north east coast of Borneo island and the problem persists for all the levels. In case of ...

Hi Forum,

I am using ROMS model configured for a climatological run in Indian Ocean. Model is initialized with a restart file from the previous run of third year and one month. My model blows up after the start of simulation for the fourth year first month.
Bathymetry (etopo2) is smoothen by 0.2 r ...

Hi Forum,

I am using ROMS model configured for the Arabian Sea in northern Indian Ocean. My model blows up soon after the start of simulation (climatological). To diagnose the problem, I run the model with different set of suitable cpp options and found that model runs fine without MASKING and ...