Search found 15 matches

by Arvin_Yin
Sun Jun 17, 2018 2:14 am
Forum: ROMS Discussion
Topic: How can I compile ROMS with MPI3
Replies: 3
Views: 1182

Re: How can I compile ROMS with MPI3

Hi kate Tkanks for your reply! I'm still trying. I found that I have done it before. But now I got a new problem " cd /NSFCGZ/nsfc2015_250/yinp/Projects/upwelling/Build; /NSFCGZ/app/MPI/Gnu/MPICH/3.2-gcc4.9.2-dyn/bin/mpif90 -c -frepack-arrays -O3 -ffast-math -ffree-form -ffree-line-length-none strin...
by Arvin_Yin
Mon Jun 11, 2018 4:23 am
Forum: ROMS Discussion
Topic: How can I compile ROMS with MPI3
Replies: 3
Views: 1182

How can I compile ROMS with MPI3

Hi everyone.
My system only got mpi3. I searched this forum found
it is possible to compile ROMS with mpi3.
But how? Since in bash.bash, there's only two choices: mpich and mpich2.
Hope for someone's help. I will really appreciate it!
by Arvin_Yin
Mon Sep 28, 2015 1:35 pm
Forum: ROMS Adjoint
Topic: Can't run my IS4D-Var case Gnorm = NaN
Replies: 8
Views: 3238

Re: Can't run my IS4D-Var case Gnorm = NaN

Many thanks. For above situation, try to use super observation file instead. Yes, it works! I saw the log file you attached and found TLM increments are zero even though ROMS continuing the intergration. I was wondering why this value is appearing. Would you give same value to nHIS and nOBC, nSFF(sa...
by Arvin_Yin
Mon Sep 28, 2015 3:15 am
Forum: ROMS Adjoint
Topic: Can't run my IS4D-Var case Gnorm = NaN
Replies: 8
Views: 3238

Re: Can't run my IS4D-Var case Gnorm = NaN

Hi, Does your domain include equator? If it's ok for you, I want to see your model domain. -JH Hi, JH Thanks. My domain doesn't include equator.It's 16N - 24N, 105E - 132E, in north South China Sea. And I have another question while I compile with SANITY_CHECK, the error goes: cd /mnt/volume04/yinp...
by Arvin_Yin
Sat Sep 26, 2015 7:52 am
Forum: ROMS Adjoint
Topic: Can't run my IS4D-Var case Gnorm = NaN
Replies: 8
Views: 3238

Can't run my IS4D-Var case Gnorm = NaN

Hi, everyone! When I run my IS4D-Var model, it blows up at the beginning of the first inner loop. The log file shows: … << Descent Algorithm > (001,000): Initial gradient norm, Gnorm = NaN … < 4D Variational Data Assimilation, Outer = 001, Inner = 001 > STEP KINETIC_ENRG POTEN_ENRG TOTAL_ENRG NET_VO...
by Arvin_Yin
Sat Sep 05, 2015 9:14 am
Forum: ROMS Adjoint
Topic: Tangent Initial Norm is NaN
Replies: 2
Views: 2065

Re: Tangent Initial Norm is NaN

Hi, leon

I believe you have solved this problem already. Now I have the similar error like you
in my IS4D-Var run, my initial gradient norm (Gnorm) is NaN.

Could you tell me more about this error and how you solved it?

Thank you very much.
by Arvin_Yin
Thu Aug 20, 2015 9:31 am
Forum: ROMS Adjoint
Topic: Use grided AVISO SLA data as observation data
Replies: 2
Views: 2212

Use grided AVISO SLA data as observation data

Hi All I want to use grided AVISO SLA data as observation data in my 4D-Var run. My question is should I use grided AVISO SLA data directly in the observation file or should I add mean sea level data to grided AVISO SLA data to make it become SSH data first and then write it into observation file? I...
by Arvin_Yin
Fri Jul 31, 2015 3:11 am
Forum: ROMS Adjoint
Topic: Input error when including boundary conditions in 4DVar
Replies: 2
Views: 2116

Re: Input error when including boundary conditions in 4DVar

Hi, all.

Now I know that this error occur because I have wrong 'NOBC' number in ocean.in file.

Nbrec=1+NTIMES/NOBC should be 10 as the error say.

I don't know why the size of 'obc_adjust' have to be 10. So, it's a new question.

Thanks for your help.
by Arvin_Yin
Tue Jul 21, 2015 9:14 am
Forum: ROMS Adjoint
Topic: Input error when including boundary conditions in 4DVar
Replies: 2
Views: 2116

Input error when including boundary conditions in 4DVar

Hi, everyone! I have successuflly run the I4D-Var model without "ADJUST_BOUNDARY", , then I defined "ADJUST_BOUNDARY", but I got this error: <<<< 4D Variational Data Assimilation, Outer = 001, Inner = 000 >>>> INITIAL: Configuring and initializing forward nonlinear model ... ******* NETCDF_CHECK_DIM...
by Arvin_Yin
Tue Apr 21, 2015 9:16 am
Forum: ROMS Discussion
Topic: Problems with unforced model -- unrealistic circulation
Replies: 9
Views: 2694

Re: Problems with unforced model -- unrealistic circulation

Thank you for all the replies.
I will try one by one and report later.
by Arvin_Yin
Mon Apr 20, 2015 12:54 pm
Forum: ROMS Discussion
Topic: Problems with unforced model -- unrealistic circulation
Replies: 9
Views: 2694

Re: Problems with unforced model -- unrealistic circulation

Thanks.
I will read these papers. Then, what are the suitable range for rx numbers?
by Arvin_Yin
Sun Apr 19, 2015 3:17 am
Forum: ROMS Discussion
Topic: Problems with unforced model -- unrealistic circulation
Replies: 9
Views: 2694

Re: Problems with unforced model -- unrealistic circulation

It looks like the standard pressure gradient error-driven currents. What are your Beckmann and Haney numbers? You didn't show that. Is your stratification a function of z only? Thank you, Kate! My Beckmann and Haney numbers are Maximum grid stiffness ratios: rx0 = 3.661005E-01 (Beckmann and Haidvog...
by Arvin_Yin
Sat Apr 18, 2015 2:48 pm
Forum: ROMS Discussion
Topic: Problems with unforced model -- unrealistic circulation
Replies: 9
Views: 2694

Problems with unforced model -- unrealistic circulation

Hi,all I am modeling the M2 internal tide in South China Sea. First I run the model without any forcing in the domain. The initial T/S are horizontally uniform. Initial velocity and ssh are set to zero. Then I run the model for two weeks. I thought that the ocean would remains at rest when unforced,...
by Arvin_Yin
Mon Dec 22, 2014 9:55 am
Forum: ROMS Discussion
Topic: HYCOM data serve as initial and boundary conditions
Replies: 3
Views: 1751

Re: HYCOM data serve as initial and boundary conditions

kate wrote:We have some Python tools for doing this, dependent on pyroms.
Thank you, kate! You are so kind. I searched "pyroms" and found this link
https://github.com/kshedstrom/pyroms
Is it right? I have never use Python before, but now I couldn't wait to learn it.
by Arvin_Yin
Sun Dec 21, 2014 2:12 pm
Forum: ROMS Discussion
Topic: HYCOM data serve as initial and boundary conditions
Replies: 3
Views: 1751

HYCOM data serve as initial and boundary conditions

Hi everydody. I want to use HYCOM data to generate my own initial and boundary condition files. But I am very confused about the interpolation. I used the RNT toolbox before. First I fill the HYCOM data use linear interpolation, then use rnt_2Doa to interpolate HYCOM data to ROMS grid, at last do th...