Search found 42 matches

by langlangxie
Wed Jun 19, 2019 7:55 am
Forum: ROMS Sediment
Topic: implement the point source of sediment in the ocean
Replies: 4
Views: 2923

Re: implement the point source of sediment in the ocean

i think it works without adding the river. give it a try. Thanks. Sorry, I am still confused. I think if I add the river as the point source, it needs to switch on the SAND_Ltsrc in the sediment.in. And then a river netcdf file should be also set to SSFNAME (i.e. SSFNAME == my_rivers.nc) in the oce...
by langlangxie
Wed Jun 19, 2019 2:15 am
Forum: ROMS Sediment
Topic: implement the point source of sediment in the ocean
Replies: 4
Views: 2923

Re: implement the point source of sediment in the ocean

I have not used this in a while, but there is a LtracerSrc option. Can you look in the ocean.in for this? There is a description at the bottom of the file. -j Thanks. I looked in the description of LtracerSrc in the ocean.in. It seems that it needs to add river runoff as a point source. However, th...
by langlangxie
Tue Jun 18, 2019 7:55 am
Forum: ROMS Sediment
Topic: implement the point source of sediment in the ocean
Replies: 4
Views: 2923

implement the point source of sediment in the ocean

Hi, I am running ROMS model with a sediment component. I would like to implement one point source of sediment at different level in the ocean. There is a post similar to my question. The post address is “https://www.myroms.org/forum/viewtopic.php?f=20&t=3787”. The author of this post considered ...
by langlangxie
Thu Mar 12, 2015 2:15 am
Forum: ROMS Discussion
Topic: Error: unable to open existing NetCDF file
Replies: 1
Views: 1860

Error: unable to open existing NetCDF file

Hi,everyone. I have had some trouble in my ROMS. Look :NLM: GET_STATE - Read state initial conditions, t = 0 00:00:00 (Grid 01, File: roms_ini_Y2001M1.nc, Rec=0001, Index=1) - free-surface (Min = 3.77269772E-01 Max = 9.62686659E-01) - vertically integrated u-momentum component (Min = -2.90209194E-01...
by langlangxie
Wed Nov 05, 2014 6:25 am
Forum: ROMS Discussion
Topic: DT and NDTFAST trouble
Replies: 3
Views: 3103

Re: DT and NDTFAST trouble

rsoutelino wrote:Did you try to increase the stack limit in the machine you're running? Just a guess, but since you decreased the time step, there is more memory being used in between netcdf time records.

Code: Select all

ulimit -s unlimited
Thanks,can you tell me how to find ulimit.I change my NRST,NAVG and so on.
thanks again!
by langlangxie
Tue Nov 04, 2014 7:05 am
Forum: ROMS Discussion
Topic: DT and NDTFAST trouble
Replies: 3
Views: 3103

DT and NDTFAST trouble

hello,everyone! I have a trouble in my roms.in. the first version: NTIMES == 1036800 !50 years DT == 600.0d0 NDTFAST == 180 NRREC == 0 LcycleRST == T NRST == 51840 NSTA == 1 NFLT == 1 NINFO == 51840 LDEFOUT == T NHIS == 0 NDEFHIS == 0 NTSAVG == 1 NAVG == 4320 NDEFAVG == 51840 NTSDIA == 1 NDIA == 0 N...
by langlangxie
Tue Nov 04, 2014 6:46 am
Forum: ROMS Discussion
Topic: Run problem!
Replies: 2
Views: 1728

Re: Run problem!

Did you just update to a new version of ROMS? If that's the situation, you can read this thread[https://www.myroms.org/forum/viewtopic.php?f=14&t=2511]. This happened to me before, but my simulation broken at the very beginning. So before updating your compiler, you can turn off the average out...
by langlangxie
Mon Nov 03, 2014 1:04 am
Forum: ROMS Discussion
Topic: Run problem!
Replies: 2
Views: 1728

Run problem!

after some seconds,the ROMS is broken.the problem is: Lateral Boundary Conditions: NLM ============================ Variable Grid West Edge South Edge East Edge North Edge --------- ---- ---------- ---------- ---------- ---------- zeta 1 Chapman Imp Chapman Imp Chapman Imp Chapman Imp ubar 1 Flather...
by langlangxie
Sat Oct 11, 2014 12:53 am
Forum: ROMS Discussion
Topic: My test_south.in
Replies: 4
Views: 2347

Re: My test_south.in

So you are saying: * With QCORRECTION, SST looks good, SSH looks bad. * Without QCORRECTION, SST looks bad, SSH looks good. Is that right? I don't know how that could be. kate,I don't mean 'Without QCORRECTION, SST looks bad, SSH looks good'.without QCORRECTION,the SST and SSH are all bad,but if wi...
by langlangxie
Fri Oct 10, 2014 1:08 am
Forum: ROMS Discussion
Topic: My test_south.in
Replies: 4
Views: 2347

Re: My test_south.in

Is this a surface heating problem or a boundary condition problem? How are you providing the surface heat fluxes? You've commented out BULK_FLUX, so you must be providing some heat flux from outside. If so, you should also provide the dQdSST term. Hello,kate. I made ​​a forced field data by agrifro...
by langlangxie
Thu Oct 09, 2014 9:08 am
Forum: ROMS Discussion
Topic: My test_south.in
Replies: 4
Views: 2347

My test_south.in

Dear all I have ran into a problem.My result of Roms is abnormal,the temp is more high in the northern of my areas. My test_south.in is : ! Keyword Lateral Boundary Condition Type ! ! Cha Chapman ! Cla Clamped ! Clo Closed ! Fla Flather _____N_____ j=Mm ! Gra Gradient | 4 | ! Nes Nested | | ! Nud Nu...
by langlangxie
Fri Sep 26, 2014 6:53 am
Forum: ROMS Discussion
Topic: the ssh is abnormal
Replies: 5
Views: 2887

Re: the ssh is abnormal

I recently had some zetas get too negative because my air pressure units were off. ROMS wants air pressures in millibars, so around a value of 1000. Or you could post your ROMS output to see if anyone sees anything obvious in there - but I'm going on vacation for a few days. thanks kate,I will try ...
by langlangxie
Fri Sep 26, 2014 3:53 am
Forum: ROMS Discussion
Topic: the ssh is abnormal
Replies: 5
Views: 2887

Re: the ssh is abnormal

It is very hard to understand what you mean. Although SSH is more relevant to your netcdf driving file than to .in file, you might want to check your driving force. I'm sorry to reply to you too lately .I mean that I think my ssh which is wrong,so I want to find a way to solve my error.I check my f...
by langlangxie
Fri Sep 19, 2014 5:36 am
Forum: ROMS Discussion
Topic: the ssh is abnormal
Replies: 5
Views: 2887

the ssh is abnormal

This my ssh picture,in the picture ,ssh is -8.32 - -7.32.The phenomenon shows sea water is only ouput without into in the area.And I find the distribution is wrong ,the high ssh should be around Luzon Strait,but not in the northern of south china sea. I can't find the error in my roms.in,so I want y...
by langlangxie
Fri Sep 19, 2014 1:11 am
Forum: ROMS Discussion
Topic: running error
Replies: 3
Views: 1965

Re: running error

This is worrisome: GET_NGFLD - 2D u-momentum western boundary condition, t = 15 00:00:00 (Rec=0000001, Index=1, File: scs_bry.nc) (Tmin= 15.0000 Tmax= 345.0000) (Min = NaN Max = NaN) GET_NGFLD - 2D v-momentum western boundary condition, t = 15 00:00:00 (Rec=0000001, Index=1, File: scs_bry.nc) (Tmin...
by langlangxie
Thu Sep 18, 2014 7:08 am
Forum: ROMS Discussion
Topic: running error
Replies: 3
Views: 1965

running error

when I are running ROMS,I run into a problem.follows: Basin information for Grid 01: Maximum grid stiffness ratios: rx0 = 2.071374E-01 (Beckmann and Haidvogel) rx1 = 5.425647E+00 (Haney) Initial basin volumes: TotVolume = 6.3267250293E+15 m3 MinVolume = 8.3358286833E+08 m3 MaxVolume = 3.2792063556E+...
by langlangxie
Thu Sep 18, 2014 1:18 am
Forum: ROMS Discussion
Topic: Lateral Boundary Condition Type
Replies: 2
Views: 2419

Re: Lateral Boundary Condition Type

Are you sure it's blowing up on the boundary? Have you looked at the boundary conditions you are providing for it? Have you tried without the volume conservation? Were you running something similar before with more success? What did you change this time? Sorry,I don't say totally,before I change la...
by langlangxie
Wed Sep 17, 2014 5:51 am
Forum: ROMS Discussion
Topic: Lateral Boundary Condition Type
Replies: 2
Views: 2419

Lateral Boundary Condition Type

I want to make my area are all open,this is VolCons(west) == T VolCons(east) == T VolCons(south) == T VolCons(north) == T Then I should change lateral boundary condition type: ! ! Cha Chapman ! Cla Clamped ! Clo Closed ! Fla Flather _____N_____ j=Mm ! Gra Gradient | 4 | ! Nes Nested | | ! Nud Nudgin...
by langlangxie
Sat Sep 13, 2014 1:24 am
Forum: ROMS Discussion
Topic: error_sighandler
Replies: 2
Views: 1761

Re: error_sighandler

kate wrote:I wrote about segmentation faults here. ROMS allocates big arrays right after printing the cppdefs.

The run with T=100 must be some other run? Unless that's your initial condition?
Thanks a lot,kate!
by langlangxie
Fri Sep 12, 2014 6:19 am
Forum: ROMS Discussion
Topic: error_sighandler
Replies: 2
Views: 1761

error_sighandler

Hi,can you help me? I make my boundary all is T,but my roms can't running.the error is South China Sea model Operating system : Linux CPU/hardware : x86_64 Compiler system : pgi Compiler command : /dcfs2/program/mpi/mvapich2/1.8/pgcc.pgf90/bin/mpif90 Compiler flags : -O3 -Mfree Input Script : SVN Ro...
by langlangxie
Mon Sep 01, 2014 8:42 am
Forum: ROMS Discussion
Topic: open boundaries problem
Replies: 0
Views: 1340

open boundaries problem

Can you help me to determine the "Open boundaries switches" Following obc = [1 1 1 1]; % open boundaries (1=open , [S E N W])(using agrifroms) My ROMS area is 104°E-120°E,2°N-24°N I make obc = [1 1 0 1],that is wrong. ??? Error using ==> geost_currents_bry at 261 Replace your South boundar...
by langlangxie
Sat Aug 30, 2014 7:50 am
Forum: ROMS Discussion
Topic: How to determine the value of dtfast ?
Replies: 4
Views: 3205

Re: How to determine the value of dtfast ?

I recently heard a quote that goes something like "I used to worry about that, but now I don't". I have also tried ndtfast=30, but when I need to shorten my main dt for stability, sometimes I reduce ndtfast. Very rarely (never?) is my model blowing up because my dtfast is too long - it fi...
by langlangxie
Fri Aug 29, 2014 2:48 am
Forum: ROMS Discussion
Topic: How to determine the value of dtfast ?
Replies: 4
Views: 3205

Re: How to determine the value of dtfast ?

You're asking how to pick ndtfast? I usually have it at 20 since my baroclinic timesteps are short enough for this to be stable. I could probably get away with smaller values, but haven't really pushed it. Yes,I am asking help about how to pick Ndtfast.Kate,you choose ndtfast=20 in your every case?...
by langlangxie
Thu Aug 28, 2014 2:29 am
Forum: ROMS Discussion
Topic: How to determine the value of dtfast ?
Replies: 4
Views: 3205

How to determine the value of dtfast ?

Hi
I know dt=Ndtfast*dtfast,and dafast depends on the maximum depth and grid resolution.what's more,dtfast is limited by the barotropic CFL criterion.
So ,I want to know how to determine dafast.
Can you help me !
by langlangxie
Thu Aug 28, 2014 1:56 am
Forum: ROMS Discussion
Topic: Relationship of some variables
Replies: 2
Views: 2001

Re: Relationship of some variables

Hi, You can take a look at this: https://www.myroms.org/forum/viewtopic.php?f=19&t=2512&hilit=dtfast to find out about the relationship between ntimes, dt and ndtfast. ntimes is the total number of timesteps so if you have for example: NTIMES=1440 DT=300 NRST,NHIS,...=288 then your model wi...
by langlangxie
Tue Aug 26, 2014 2:39 pm
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

I told you to try NINFO=1. With dt=60 and that many steps, you are asking it to run for 36 days, saving an averages file every 3 days. You shouldn't get 20 averages files, just 12. Right? I've never heard of anyone using ndtfast as large as 600. You must have told it that your initial file is a res...
by langlangxie
Tue Aug 26, 2014 2:02 pm
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

Are you changing NAVG as well as NINFO? You should read up on these parameters - they are described briefly at the bottom of the ocean.in file. As for ROMS blowing up, there are a few tips on the wiki. Dear kate Firstly,thanks again! My NAVG is not equal to NINFO.NAVG=4320,and NINFO=51840. When I m...
by langlangxie
Tue Aug 26, 2014 6:25 am
Forum: ROMS Discussion
Topic: Relationship of some variables
Replies: 2
Views: 2001

Relationship of some variables

Dears,
I doubt there is a big relationship between some variables,such as ntimes,ndtfast,nhis,navg,ndia and nrst.
Can you give me some explainings?
Thank you very much!
by langlangxie
Tue Aug 26, 2014 1:14 am
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

The best value for NINFO is 1 (as above). That way, ROMS will check for NaN and other such values every time-step. Your model is going bad and you need to figure out where and why. Thanks! I am finding my errors in my ROMS.can you give me some directions of going bad? Today,I get a result ,and I ge...
by langlangxie
Mon Aug 25, 2014 2:09 pm
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

Zeta is the free surface elevation and it evolves during a model run. It would be in your ini file and also in the restart file, plus whatever other outputs you've asked for. I suggest ncview to look at the netcdf input and output files. Thanks for your help! Firstly ,I got a error is "WRT_AVG...
by langlangxie
Fri Aug 22, 2014 5:46 am
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

Have you set NINFO to 1? If you do, you will get a diagnostics report each timestep. If the model is blowing up, you would then see it there first. If NINFO is large, you can get a NaN and ROMS will keep running. I believe you have NaN or some such number in your zeta field, which is why it won't w...
by langlangxie
Fri Aug 22, 2014 1:11 am
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

kate wrote:NINFO is set in your ocean_xx.in file. Try setting it to 1. If you can get things to run stably, then you can set it to a large value again if you like. I always leave it at 1 and put up with the extra output.
Thanks a lot. Thanks a million!
by langlangxie
Fri Aug 22, 2014 12:50 am
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Re: Computing problem!

Have you set NINFO to 1? If you do, you will get a diagnostics report each timestep. If the model is blowing up, you would then see it there first. If NINFO is large, you can get a NaN and ROMS will keep running. I believe you have NaN or some such number in your zeta field, which is why it won't w...
by langlangxie
Thu Aug 21, 2014 1:01 am
Forum: ROMS Discussion
Topic: Computing problem!
Replies: 13
Views: 5375

Computing problem!

Hi,I have a problem in computing ROMS. This is : WRT_AVG - error while writing variable: zeta into averages NetCDF file for time record: 1 Elapsed CPU time (seconds): Node # 0 CPU: 1009.411 Node # 4 CPU: 1009.387 ROMS/TOMS - Output NetCDF summary for Grid 01: Node # 5 CPU: 1009.386 Node # 10 CPU: 10...
by langlangxie
Wed Aug 20, 2014 6:02 am
Forum: ROMS Discussion
Topic: Why my ROMS can't calculate?
Replies: 6
Views: 2688

Re: Why my ROMS can't calculate?

kapitzah wrote:The argument to option -np seems to have a misplaced '-character. It is

-np 'cat${PBS_NODEFILE}|' wc -l

while it should be something like

-np `cat ${PBS_NODEFILE}| wc -l`

Please note the backticks ` instead of '
Thank you very much!
by langlangxie
Wed Aug 20, 2014 2:45 am
Forum: ROMS Discussion
Topic: Why my ROMS can't calculate?
Replies: 6
Views: 2688

Re: Why my ROMS can't calculate?

Still, how far does it get? What is the last thing ROMS outputs? No time. + NSLOTS='cat${PBS_NODEFILE}| wc -l' + echo 'This jobs is 4681.node200@general' This jobs is 4681.node200@general + cd /dcfs2/users/langlangxie/Projects/upwelling + /dcfs2/program/mpi/mvapich2/1.8/pgcc.pgf90/bin/mpirun_rsh -s...
by langlangxie
Wed Aug 20, 2014 12:55 am
Forum: ROMS Discussion
Topic: Why my ROMS can't calculate?
Replies: 6
Views: 2688

Re: Why my ROMS can't calculate?

kate wrote:You're not giving us much to go on. How does it not compute? Can you provide the error output from ROMS or did you not get any?

I don't get any error.The ROMS just stop computing.
Thanks for your help!
by langlangxie
Tue Aug 19, 2014 3:11 am
Forum: ROMS Discussion
Topic: Why my ROMS can't calculate?
Replies: 6
Views: 2688

Why my ROMS can't calculate?

Now,I want to use ROMS to make a model of South China Sea.First,I product some files in using agrif_roms.such as *_bry.nc,*_ini.nc,*_grd.nc,*_frc.nc.*_clm.nc,then I take these files into my project,and compile ROMS,lastly,I put these into cluster computing.In processing,I'm sure compiling and Job ar...
by langlangxie
Thu Aug 14, 2014 1:02 am
Forum: ROMS Discussion
Topic: ROMS can't be calculated,help me!
Replies: 5
Views: 2633

Re: ROMS can't be calculated,help me!

kate wrote:Hmm, I don't know that one. Here's what I wrote about ROMS blowing up.
Thanks your help!
by langlangxie
Wed Aug 13, 2014 6:16 am
Forum: ROMS Discussion
Topic: ROMS can't be calculated,help me!
Replies: 5
Views: 2633

Re: ROMS can't be calculated,help me!

Could you please be more specific about what you are trying to do and what is going wrong? You don't need all those files for the upwelling case. Have you looked through the documentation on the wiki? There is also a manual. Thanks! I am now doing a model of the South China Sea in this case on the ...
by langlangxie
Wed Aug 13, 2014 2:24 am
Forum: ROMS Discussion
Topic: ROMS can't be calculated,help me!
Replies: 5
Views: 2633

Re: ROMS can't be calculated,help me!

Could you please be more specific about what you are trying to do and what is going wrong? You don't need all those files for the upwelling case. Have you looked through the documentation on the wiki? There is also a manual. Thanks! I am now doing a model of the South China Sea in this case on the ...
by langlangxie
Tue Aug 12, 2014 7:02 am
Forum: ROMS Discussion
Topic: ROMS can't be calculated,help me!
Replies: 5
Views: 2633

ROMS can't be calculated,help me!

Kindhearted persons:
I already have some files,such as .ini,.grd,.clm,.frc and so on.Now I want to calculate my ROMS(It is just upwelling example),but it can't be calculated.I don't know How to modify the file(such upwelling.h and ocean_upwelling.in).
Thanks for everyone help!