Search found 18 matches

by mdessert
Thu Jun 28, 2018 8:28 am
Forum: ROMS Discussion
Topic: ROMS blowing up problem
Replies: 11
Views: 2270

Re: ROMS blowing up problem

Actually, I have a similar problem : my velocities, temperature (my ocean will boil soon !!!) and salinity behave abnormal near the boundaries (although the boundaries seem OK !?!) You wrote : The velocity seem to be go bad on the boundaries (from the bottom to the surface), I suspect my tidal forci...
by mdessert
Thu Jun 28, 2018 7:03 am
Forum: ROMS Discussion
Topic: ROMS blowing up problem
Replies: 11
Views: 2270

Re: ROMS blowing up problem

Have you checked the value of your CFL criteria? Minimum barotropic Courant Number = 1.17951147E-02 Maximum barotropic Courant Number = 4.07452685E-01 in the print you can read as your model is running (and that I put in a 'log_file'). If your Courant Number is too high, that means your grid can be ...
by mdessert
Fri Jun 22, 2018 10:28 am
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Thank you for your advice. :) Actually, I understood I had to use the advection scheme if I wanted the more efficient solution for configuration with steep bathymetry, following some advices from K. Hedstrom. 2016. Technical Manual for a Coupled Sea-Ice/Ocean Circulation Model (Version 4). U.S. Dept...
by mdessert
Fri Jun 22, 2018 9:24 am
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Hi Kate, thank you for your answer. I've tried to activate LIMIT_BSTRESS as you suggested. Unfortunately, that does not work either. (It blows up with the same abnormal velocity values). I then tried # define LIMIT_VVISC #define RI_SPLINES I tried to change my drag scheme (with #define UV_LOGDRAG an...
by mdessert
Thu Jun 21, 2018 8:46 am
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Hi everyone, I keep working on my configuration and I'm facing for several days a new blowing-up event after four time step (one time step is 180 s). I look deeper into my output files (netcdf and log error) and I had some clues. But I'm afraid that I have not the keys to understand well. Actually, ...
by mdessert
Thu Jun 21, 2018 7:28 am
Forum: ROMS Tools and Techniques
Topic: About HYCOM data download
Replies: 1
Views: 886

Re: About HYCOM data download

Hi lalvarez! I'm working with the HYCOM files too (but the GLBv0.08 analysis). I tried to download one file from the GLBu0.08 to test it but I got this message : Requested time range 1999-04-18T00:00:00Z - 1999-06-20T00:00:00Z does not intersect actual time range 2016-04-18T00:00:00Z - 2018-06-20T00...
by mdessert
Wed May 30, 2018 2:21 pm
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Thank you for your advices. Actually, I had some problems with my atmospheric input files because of interpolation online. In fact, my input files were written with the latitude decreasing instead of increasing. So when ROMS was scanning (in subroutine hindices in interpolate.F) my latitude values t...
by mdessert
Mon May 28, 2018 7:50 am
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Hello modellers, I've made some modifications to ROMS take into account the "hour" units as time axis. Now, here is what I've added. In mod_scalars.F : I added line 705 real(r8), parameter :: day2sec = 86400.0_r8 real(r8), parameter :: hour2day = 1.0 / 24.0_r8 ! LINE 705 real(r8), parameter :: sec2d...
by mdessert
Thu May 24, 2018 7:12 am
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Thank you for your advice! :) None of these files seems to be weird (No Nan, and values are coherent). But I noticed something concerning my wind input. On the netCDF in the initial file, all values seem OK. But as I make my ROMS model write the values of wind it reads in netCDF (adding WRITE(*,*) i...
by mdessert
Wed May 23, 2018 2:33 pm
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

That does not matter the fact that the K from (Akt) is in capital letter in one line and not in the other?
(Anyway, I tested with Akt at the place of AKt, and that does not solve my problem... )
I keep on searching...
by mdessert
Wed May 23, 2018 2:18 pm
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

Re: ROMS is blowing up after just one time step

Thank you Kate for your answer. I tried to smooth (even exageratedly) but, as you expected, that does not solve anything. I tried to compute an other domain with a smoother bathymetry as joining the coast but that does not change anything neither. With a colleague, we have noticed that my ocean_his....
by mdessert
Wed May 23, 2018 8:37 am
Forum: ROMS Problems
Topic: ROMS is blowing up after just one time step
Replies: 15
Views: 2297

ROMS is blowing up after just one time step

Hi modellers, I'm trying to model the ocean dynamics in a “small” domain along the coast of West South Africa in the Benguela Current. I chose it a bit randomly as a first test domain as I want to study other domains afterwards. At the fist time step (t=1), ROMS blows up while indicating that : Foun...
by mdessert
Mon May 21, 2018 2:55 pm
Forum: ROMS Tools and Techniques
Topic: error as reading my atmospheric forcing files
Replies: 2
Views: 796

Re: error as reading my atmospheric forcing files

Silly mistake! I was right on that point!
Thank you very much :)
It works ... further now!
by mdessert
Mon May 21, 2018 2:27 pm
Forum: ROMS Tools and Techniques
Topic: error as reading my atmospheric forcing files
Replies: 2
Views: 796

error as reading my atmospheric forcing files

Hello modellers, I'm trying to run ROMS using the BULK FLUX Formulae to simulate my atmosphere. For that, I have build the netcdf files using the pyroms tools and inspiring from the MERRA example (providing with pyroms package). atm_forc_GFS_2018-01-01_Pair.nc atm_forc_GFS_2018-01-01_Tair.nc atm_for...
by mdessert
Tue Apr 17, 2018 7:50 am
Forum: ROMS Tools and Techniques
Topic: training on pyroms ARCTIC2
Replies: 5
Views: 1858

Re: training on pyroms ARCTIC2

Thanks a lot! Indeed, I did not notice the modification in the index as downloading the HYCOM files. Now, my ssh interpolation works correctly. And at the same time, that explains the error I received after the ssh interpolation, as computing the interpolation of the following variables. Traceback (...
by mdessert
Mon Apr 16, 2018 2:23 pm
Forum: ROMS Tools and Techniques
Topic: training on pyroms ARCTIC2
Replies: 5
Views: 1858

Re: training on pyroms ARCTIC2

Hello everyone, I try to interpolate some HYCOM output fields (temperature, salinity, ssh and wind velocity) to a ROMS grid thanks the pyroms tools. To achieve that, I try to reproduce the HYCOM_Arctic example from the examples directory. Yet, I succeed in interpolating the ssh from HYCOM GLBa0.08 t...
by mdessert
Wed Apr 11, 2018 3:37 pm
Forum: ROMS Tools and Techniques
Topic: training on pyroms ARCTIC2
Replies: 5
Views: 1858

Re: training on pyroms ARCTIC2

Thanks a lot! :)
by mdessert
Wed Apr 11, 2018 8:19 am
Forum: ROMS Tools and Techniques
Topic: training on pyroms ARCTIC2
Replies: 5
Views: 1858

training on pyroms ARCTIC2

Hello everyone, I'm trying to use the pyroms tools to create my own files for initializing, defining boundaries and forcing. As the files I want to use are from HYCOM outputs (from GLBv0.08), I first want to train on the Arctic_HYCOM example. To do it, I need a definition of the grid ARCTIC2 (that I...