Search found 139 matches

by rduran
Tue Jul 09, 2019 3:26 pm
Forum: ROMS Discussion
Topic: Alongshore currents with periodic alongshore boundaries
Replies: 9
Views: 734

Re: Alongshore currents with periodic alongshore boundaries

However, in this strategy results in seemingly erroneously faster velocities in the shallower nearshore part of the domain. Another problem to keep in mind when using periodic alongshore boundaries, is that next to the coast, whatever signal is generated will propagate right back to where it is bei...
by rduran
Fri Jun 14, 2019 4:35 am
Forum: ROMS Discussion
Topic: Floats in nested configuration
Replies: 3
Views: 306

Re: Floats in nested configuration

Can ROMS track passive tracer through nested grids? If so, another option is three passive tracers with physical diffusion set to zero—each tracer being a label for each coordinate of each parcel's initial position. For examples see Kuebel Cervantes, B. T., J. S. Allen, and R. M. Samelson, 2004. Lag...
by rduran
Sat Nov 24, 2018 2:41 am
Forum: ROMS Tools and Techniques
Topic: Building ROMS grid topography from scattered, sparse data
Replies: 2
Views: 949

Re: Building ROMS grid topography from scattered, sparse dat

Here are some Matlab tools that are based on ideas that seem to be along the same lines. It should be relatively straightforward to test them so it's probably worth the time. I was happy with gridfit when I used it back in the day. Gridfit offers "diffusion", "gradient" and "springs" options to fit ...
by rduran
Sun Sep 30, 2018 12:17 pm
Forum: ROMS Discussion
Topic: Low temperature issue
Replies: 1
Views: 439

Re: Low temperature issue

Are these low temperatures related to a vertical velocity?
by rduran
Fri May 04, 2018 6:58 pm
Forum: ROMS Installation
Topic: Will it be convenient (in the long run) to use Windows?
Replies: 7
Views: 3158

Re: Will it be convenient (in the long run) to use Windows?

Ed, they are not using cygwin. I don't have any help for your question, sorry to say. But wanted to mention that an alternative that will allow one to use a display is to instal Xming free software, double click that and that is it, you will be able to run your apps with display (so far tested octav...
by rduran
Fri Oct 20, 2017 5:33 pm
Forum: ROMS Installation
Topic: ROMS using Windows 10
Replies: 6
Views: 4010

Re: ROMS using Windows 10

just wanted to update that windows subsystem for linux is now fully released: Another key upgrade is that the Windows Subsystem for Linux (WSL) is now fully released. Once again, there are several steps involved: enable the feature, install your preferred distro from the Store, run the app to comple...
by rduran
Wed May 17, 2017 8:38 pm
Forum: ROMS Discussion
Topic: Roms grid rotation and interpolation
Replies: 16
Views: 3627

Re: Roms grid rotation and interpolation

It seems the key word is conservative interpolation or conservative remapping, I hope ROMS folks can chip in re what ROMS does when interpolating but in general this paper answers your question http://journals.ametsoc.org/doi/pdf/10.1175/1520-0493(1999)127%3C2204:FASOCR%3E2.0.CO%3B2 The software imp...
by rduran
Fri Apr 14, 2017 5:06 am
Forum: ROMS Tools and Techniques
Topic: The problem about matlab package and seagrid package
Replies: 6
Views: 4670

Re: The problem about matlab package and seagrid package

There are other places where to learn matlab, and that is probably a good place to start.
by rduran
Mon Nov 07, 2016 3:43 pm
Forum: ROMS Bugs
Topic: bug/typo in hslope.m
Replies: 0
Views: 1690

bug/typo in hslope.m

hslope.m version % svn $Id: hslope.m 796 2016-05-11 01:45:21Z arango $ %===========================================================================% % Copyright (c) 2002-2016 The ROMS/TOMS Group % % Licensed under a MIT/X style license % % See License_ROMS.txt Hernan G. Arango % %===================...
by rduran
Wed Sep 14, 2016 5:05 am
Forum: ROMS Problems
Topic: Temperature Difference from ROMS to HYCOM
Replies: 9
Views: 5175

Re: Temperature Difference from ROMS to HYCOM

Hi, Looking much much better (as far as spurious velocity is concerned), glad I could help. Possibly, you have reduced both terms on the right hand side of vel = PGE + stuff so who knows, perhaps a bit of a steeper topography is ok, probably a good idea to test with higher r. Ocean models are simply...
by rduran
Sun Aug 28, 2016 7:19 pm
Forum: ROMS Problems
Topic: Temperature Difference from ROMS to HYCOM
Replies: 9
Views: 5175

Re: Temperature Difference from ROMS to HYCOM

1.Is it means wave reflection,or momentum diffusion term? :?: 2.Can I set TNU2 == 0 and VISC2 ==0 to minimize momentum diffusion term if it is the "stuff"? Its been some time since I last checked for a pge, but I do have a plan for next time I check for it and I can share it with you, just keep in ...
by rduran
Fri Aug 26, 2016 5:30 am
Forum: ROMS Problems
Topic: Temperature Difference from ROMS to HYCOM
Replies: 9
Views: 5175

Re: Temperature Difference from ROMS to HYCOM

What do the horizontal currents from the pge with no forcing look like? ROMS vertical velocity is related to the horizontal velocity, it is computed diagnostically by integrating the continuity equation. It seems that somehow near the slope you are getting divergence/convergence of horizontal curren...
by rduran
Wed Aug 17, 2016 5:24 am
Forum: ROMS Installation
Topic: ROMS using Windows 10
Replies: 6
Views: 4010

Re: ROMS using Windows 10

Hi johnluick thanks for your response. I have good news, starting with an update that is currently (also slowly) making its way to windows 10 users, you no longer need to be in the windows insider club. Ubuntu is still beta (not everything is functional) and you will need to have developer mode acti...
by rduran
Sat Aug 13, 2016 4:34 am
Forum: ROMS Installation
Topic: ROMS using Windows 10
Replies: 6
Views: 4010

Re: ROMS using Windows 10

The latest windows 10 update provides native linux ubuntu. Its supposed to run just like ubuntu you can find plenty of demos by googling it. It would therefore seem if ubuntu users can do it that windows 10 users could do it as well ... but there is only one way to know for sure. I hope those that t...
by rduran
Sat Jul 16, 2016 5:01 am
Forum: ROMS Tools and Techniques
Topic: standard_name for U,V current components
Replies: 6
Views: 3968

Re: standard_name for U,V current components

Hi Hernan,
Depth integrated is m2/s and is consistent with the definition you give; in that case this is what may need revising:

Code: Select all

units = "meter second-1"
Edit: however if both sides are divided by D before writing to netcdf then the units are correct and that would be depth-averaged by definition.
by rduran
Fri Jul 15, 2016 6:41 am
Forum: ROMS Tools and Techniques
Topic: standard_name for U,V current components
Replies: 6
Views: 3968

Re: standard_name for U,V current components

I guess it could be understood from the context but just to be clear, it seems that vertically averaged was intended instead of vertically integrated: float ubar_eastward(ocean_time, eta_rho, xi_rho) ; ubar_eastward:long_name = "eastward vertically integrated momentum component at RHO-points" ; ubar...
by rduran
Thu Jul 14, 2016 5:15 am
Forum: ROMS Installation
Topic: Will it be convenient (in the long run) to use Windows?
Replies: 7
Views: 3158

Re: Will it be convenient (in the long run) to use Windows?

A very appealing option is just becoming available: run ubuntu natively within windows 10. Search for "ubuntu windows 10" you will find plenty of info for example https://blogs.windows.com/buildingapps/2016/03/30/run-bash-on-ubuntu-on-windows/ It will be interesting to see how this option handles RO...
by rduran
Thu Feb 04, 2016 6:37 pm
Forum: ROMS Problems
Topic: Unrealisitic thickness of mixed layer
Replies: 15
Views: 10454

Re: Unrealisitic thickness of mixed layer

They found that KPP did better than MY2.5 for a coastal environment in this study, except during a downwelling episode -- see fig 9.

http://onlinelibrary.wiley.com/doi/10.1 ... 8/abstract

Circumstantial evidence is as good as it gets it seems, so the more of it the better.
by rduran
Fri Jan 29, 2016 5:12 am
Forum: ROMS Problems
Topic: Unrealisitic thickness of mixed layer
Replies: 15
Views: 10454

Re: Unrealisitic thickness of mixed layer

Thanks John. Your conclusion is similar to the paper I posted which also uses ROMS' implementations, that's good.
by rduran
Tue Jan 12, 2016 10:22 pm
Forum: ROMS Problems
Topic: Unrealisitic thickness of mixed layer
Replies: 15
Views: 10454

Re: Unrealisitic thickness of mixed layer

My comment was on the ROMS implementation of MY, not the algorithm itself. Thanks Kate I can see that now. It would be good to know if ROMS implementation has problems. At OSU ROMS is used quite a bit with MY, not sure what ROMS or MY for the matter. Edit: In fact that paper uses ROMS and is over 1...
by rduran
Tue Jan 12, 2016 6:03 am
Forum: ROMS Problems
Topic: Unrealisitic thickness of mixed layer
Replies: 15
Views: 10454

Re: Unrealisitic thickness of mixed layer

I was told probably ten years ago now that the MY2.5 scheme in ROMS is broken and should not be used. Instead, it is recommended to use either the GLS or the LMD schemes. Anyone know if the MY2.5 scheme was ever fixed? Or why it wasn't simply deleted? There may be researchers that are not fond of M...
by rduran
Wed Nov 25, 2015 4:37 am
Forum: ROMS Discussion
Topic: barotropic equation in ROMS
Replies: 16
Views: 2638

Re: barotropic equation in ROMS

ROMS doesn't solve vorticity equations, solve primitive equations.
by rduran
Tue Oct 27, 2015 5:11 am
Forum: ROMS Discussion
Topic: low vertical velocity at coast
Replies: 3
Views: 828

Re: low vertical velocity at coast

Vertical velocity at the surface tends to be much smaller than vertical velocity in the interior. Did you check different layers? (Just making sure it's not that). Vertical velocity in ROMS should be decent enough to, say, simulate upwelling and downwelling as long as they correspond to the processe...
by rduran
Fri Oct 09, 2015 6:10 am
Forum: ROMS Results
Topic: The problem about creating an idealized warm ocean eddy
Replies: 5
Views: 2603

Re: The problem about creating an idealized warm ocean eddy

I recall my undergrad adviser (physical oceanography) saying: I am sure you can find a square wave in the ocean. That actually makes sense if one thinks in terms of representing waves as a linear combination of trigonometric functions (Fourier series) -- you get a square with two step functions and ...
by rduran
Tue Apr 21, 2015 3:14 pm
Forum: ROMS Discussion
Topic: Problems with unforced model -- unrealistic circulation
Replies: 9
Views: 2227

Re: Problems with unforced model -- unrealistic circulation

Sorry I meant to say increase horizontal resolution, as Kate said.

Either decrease vertical resolution (e.g. Decreasing number of sigma levels) or increase horizontal resolution, or both.

You have to see what is required for your application, what error is acceptable and what error is not.
by rduran
Tue Apr 21, 2015 4:43 am
Forum: ROMS Discussion
Topic: Problems with unforced model -- unrealistic circulation
Replies: 9
Views: 2227

Re: Problems with unforced model -- unrealistic circulation

I would not be surprised if the currents were substantially less if the boundaries were closed at the same time the signal can move around the domain when the boundaries are closed adding momentum each time it does, need to watch for that. the rx parameters are not the whole story they are apriori ...
by rduran
Wed Apr 01, 2015 3:50 am
Forum: ROMS Discussion
Topic: Full vorticity equations
Replies: 5
Views: 2472

Re: Full vorticity equations

Excellent, thank you very much Ryan, Patrick.
by rduran
Mon Mar 30, 2015 11:00 pm
Forum: ROMS Discussion
Topic: Full vorticity equations
Replies: 5
Views: 2472

Full vorticity equations

Hi,

I would like to track down any papers using/describing the full vorticity equations (2D and/or 3D) say from cross-differentiating ROMS diagnostics or any other method.

Does anyone know the details for such references?

thanks.

Rodrigo.
by rduran
Fri Aug 08, 2014 1:03 am
Forum: ROMS Installation
Topic: netcdf.mod file
Replies: 2
Views: 2604

Re: netcdf.mod file

If you search for netcdf.mod or the error you get youll probable find a number of people already asked a similar question and you'll probably find some helpful answers as well.

HTH
by rduran
Tue Jul 15, 2014 7:31 am
Forum: ROMS Problems
Topic: Diagnostics don't add up!
Replies: 10
Views: 4404

Re: Diagnostics don't add up!

A few grid points at a river mouth were plain wrong. I thought that all grid cells had to add up to zero. So once you identified the cells that were wrong, you removed them from your analysis? Yes, momentum terms adding up to zero (whatever zero means) should be pointwise. I guess it is possible to...
by rduran
Sun Jul 13, 2014 6:28 am
Forum: ROMS Problems
Topic: Diagnostics don't add up!
Replies: 10
Views: 4404

Re: Diagnostics don't add up!

Hi, A few grid points at a river mouth were plain wrong. Checking for balanced momentum in an integrated fashion might be a good first step but I needed to look at the details to see where things went wrong. Your case seems to be different. Perhaps the question "what is zero?" is a relevant one. One...
by rduran
Wed May 21, 2014 12:53 am
Forum: ROMS Discussion
Topic: abnormal salinity with river point source
Replies: 3
Views: 1600

Re: abnormal salinity with river point source

Do your vshapes add up to one?

I got very weird salinities at a river mouth with a vshape that did not.

Another thing to check in your trial and error list.
by rduran
Fri Apr 11, 2014 11:38 pm
Forum: ROMS Bugs
Topic: Possibly 3 nesting-related bugs
Replies: 16
Views: 5385

Re: Possibly 3 nesting-related bugs

I was looking at the wikiroms page that Hernan posted, and found that the donor/receiver grid exchange information through a bilinear interpolation The horizontal interpolation weights are as follows: Hweight(1,:) = (1.0 - p) * (1.0 - q) Hweight(2,:) = p * (1.0 - q) Hweight(3,:) = p * q Hweight(4,:)...
by rduran
Thu Mar 06, 2014 12:39 am
Forum: ROMS Discussion
Topic: Nested grids and bathymetry smoothing
Replies: 7
Views: 2671

Re: Nested grids and bathymetry smoothing

Notice they are giving you the max values for r0 and r1 so its not surprising that you get the bigger of the values reported for the nested grids when using only one grid. You can look up how they are computed in the code by using grep.
by rduran
Sun Feb 16, 2014 12:34 am
Forum: ROMS Discussion
Topic: DIAGNOSTICS momentum term signs/directions
Replies: 1
Views: 847

Re: DIAGNOSTICS momentum term signs/directions

That's right. as you discovered everything but accel is on the rhs
by rduran
Sat Jan 18, 2014 12:35 am
Forum: ROMS Problems
Topic: Error while processing Climatology multi-files:
Replies: 8
Views: 3608

Re: Error while processing Climatology multi-files:

I wish all errors were as explicit, did you check what the error suggests you check?

Code: Select all

CHECK_MULTIFILE - Error while processing Climatology multi-files: 
data does not include initialization time = 0 00:00:00
by rduran
Fri Oct 04, 2013 7:54 pm
Forum: ROMS Documentation
Topic: Typo in boundary condition documentation
Replies: 0
Views: 1799

Typo in boundary condition documentation

I believe that the bottom boundary condition

-w + \vec{v} \cdot \nabla h = 0

should be

w + \vec{v} \cdot \nabla h = 0


https://www.myroms.org/wiki/index.php/E ... Conditions
by rduran
Mon Sep 23, 2013 1:28 am
Forum: ROMS Discussion
Topic: Surface heat flux. Double the count?
Replies: 18
Views: 8464

Re: Surface heat flux. Double the count?

Did not know that thanks to all for sharing.
by rduran
Sun Sep 22, 2013 3:50 pm
Forum: ROMS Discussion
Topic: Surface heat flux. Double the count?
Replies: 18
Views: 8464

Re: Surface heat flux. Double the count?

Yes, i found it very interesting, I'm not sure if there is a paper out yet because it seemed a very recent result, but he might have a poster or something like that. Turns out that the Columbia river output is very important to get SST right off the norther US West coast. But that is a very big rive...
by rduran
Fri Sep 20, 2013 12:58 am
Forum: ROMS Discussion
Topic: Surface heat flux. Double the count?
Replies: 18
Views: 8464

Re: Surface heat flux. Double the count?

If there is a river in your region of study you might want to contact Dr. Alexander Kurapov from Oregon State University. He has recent research showing the effect of a river on the sea surface temperature of a ROMS model off the Oregon and Washington coasts. It has to do with how deep radiation pen...
by rduran
Thu Sep 19, 2013 1:41 am
Forum: ROMS Discussion
Topic: trace the float trajectory back
Replies: 8
Views: 3475

Re: trace the float trajectory back

Here is a doctoral thesis (methematics) dealing with PDEs and negative times -- in particular they work with Navier Stokes and Burgers equation as t --> -Inf http://repository.tamu.edu/bitstream/handle/1969.1/4940/etd-tamu-2005C-MATH-Dascali.pdf?sequence=1 Radu, the author, came to OSU as a professo...
by rduran
Sun Sep 01, 2013 7:57 pm
Forum: ROMS Trivia
Topic: What´s the difference between Modeling and Simulating
Replies: 10
Views: 4880

Re: What´s the difference between Modeling and Simulating

There is a recent article for the hydrological modeling literature that reads (section 3): There is considerable confusion in the literature about the use of the terms simulation, prediction, projection, forecasting, and hindcasting; the usage in hydrological modeling in some cases conflicts with usa...
by rduran
Wed Aug 28, 2013 1:25 am
Forum: ROMS Discussion
Topic: Confusion about abnormal flow and great temperature gradient
Replies: 6
Views: 2484

Re: Confusion about abnormal flow and great temperature grad

do you mean that a daily BC will do better for a ten year model ? Mybe I will try a daily BC... in my small amount of experience daily boundary conditions work very well. If you can get data at the same times when ROMS asks for a BC you might not even need nudging at the boundaries at all... that i...
by rduran
Sun Aug 25, 2013 1:23 am
Forum: ROMS Discussion
Topic: Confusion about abnormal flow and great temperature gradient
Replies: 6
Views: 2484

Re: Confusion about abnormal flow and great temperature grad

A monthly BC is not a good idea, imagine following scenario to illustrate: a relatively strong flow coming in, you have that more or less fixed for a period of time because of the low frequency BC, but your model has higher frequency stuff going on the interior and it wants flow to go out. Strong fl...
by rduran
Sat Aug 03, 2013 3:20 am
Forum: ROMS Discussion
Topic: Plot velocity vectors
Replies: 11
Views: 3328

Re: Plot velocity vectors

The reason dimensions do not agree is because you are doing a matrix multiplication of a single value and a matrix instead of an element-wise (or point-wise) multiplication of the matrix with the element {sqrt(1)}
not true
by rduran
Mon Jun 24, 2013 5:04 am
Forum: ROMS Trivia
Topic: What´s the difference between Modeling and Simulating
Replies: 10
Views: 4880

Re: What´s the difference between Modeling and Simulating

Hi all, I am not persuaded that you are not simulating when modeling, take a box model for example. A much simplified model but I still see it as simulating say a very basic physical principle or the likes. Nor am I persuaded that you are not modeling when simulating. What I do agree is that giving ...
by rduran
Sun Jun 16, 2013 9:49 am
Forum: ROMS Trivia
Topic: What´s the difference between Modeling and Simulating
Replies: 10
Views: 4880

Re: What´s the difference between Modeling and Simulating

Perhaps they are being used interchangeably. I think one could argue that if you are doing a simulation you are surely modeling (whatever you are simulating you are using a model to simulate it) and if you are modeling ... well you are certainly simulating something (if not reality then some idealiz...
by rduran
Thu May 09, 2013 6:57 am
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Hi! Here is a copy-paste of what I get with ncdump -h RST00.nc :NLM_LBC = "\n", "EDGE: WEST SOUTH EAST NORTH \n", "zeta: Cha Cha Clo Cha \n", "ubar: Fla Fla Clo Fla \n", "vbar: Fla Fla Clo Fla \n", "u: RadNud RadNud Clo RadNud \n", "v: RadNud RadNud Clo RadNud \n", "temp: RadNud RadNud Clo RadNud \n...
by rduran
Tue May 07, 2013 2:12 am
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Hernan, The command :set invlist in editor Vim shows any invisible characters, the $ is for "enter" (or next line), the point there is that there are no other characters in the in file, if you read a previous post in this thread I have checked that carefully. Re netcdf, then I do not know how to che...
by rduran
Mon May 06, 2013 12:42 pm
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

HI just want to mention that I tried to restart with a restart file that was created with ROMS 3.6 and again, as above, I am getting problems with characters that don't exist: LBC_GETATT - inconsistent northern boundary for variable: tke Keyword = Gra<90>§ß^N in input file: /home/server/student/home...
by rduran
Tue Apr 30, 2013 9:28 pm
Forum: ROMS Problems
Topic: Diagnostics don't add up!
Replies: 10
Views: 4404

Re: Diagnostics don't add up!

I verified the results in different matlabs, different computers and using matlab's official way to read netcdf (i.e. ncread in matlab R2012B) instead of using ncload and makenan. I did this for a run made with ROMS revision 571 and in run made with a revision 656 I am getting same results as above.
by rduran
Tue Apr 30, 2013 2:28 pm
Forum: ROMS Problems
Topic: Diagnostics don't add up!
Replies: 10
Views: 4404

Re: Diagnostics don't add up!

Hernan,

Thank you for your answer. In the first post of this thread you can see that the 2D diagnostics also look suspicious. You can also see I added the code for the sum of 2D momentum terms (I did include bottom and surface stress).
by rduran
Tue Apr 30, 2013 2:00 pm
Forum: ROMS Problems
Topic: Diagnostics don't add up!
Replies: 10
Views: 4404

Re: Diagnostics don't add up!

Parker, Thank you very much for taking a look at this! Are you using "nudging to climatology" in your domain? I do not have M2CLM_NUDGING nor M3CLM_NUDGING defined (I found that with daily boundary conditions there was no need for nudging). This was done with ROMS 3.6 revision 571, but I am getting ...
by rduran
Sun Apr 28, 2013 5:52 pm
Forum: ROMS Problems
Topic: Diagnostics don't add up!
Replies: 10
Views: 4404

Diagnostics don't add up!

I wrote a simple matlab code to check if momentum diagnostics add to zero, turns out that the u-momentum does and v-momentum do not. Here is the code I used so you can see it is not a bug (typo or so) from my part: for kk=1:tot file=files{kk}; ncload(file) vmom=makenan(v_accel-(v_cor+v_hadv+v_vadv+v...
by rduran
Thu Apr 25, 2013 2:38 pm
Forum: ROMS Discussion
Topic: Begginer Questions about Modifying ROMS: Forcing & Domain
Replies: 30
Views: 4122

Re: Begginer Questions about Modifying ROMS: Forcing & Domai

You should have noticed that all cpp options that are defined have

Code: Select all

#define XXX
while all options that are undefined have

Code: Select all

#undef YYY
.

# is not used to comment a line.
by rduran
Fri Mar 08, 2013 1:52 am
Forum: ROMS Discussion
Topic: stiffness number for rx0 and rx1
Replies: 11
Views: 9872

Re: stiffness number for rx0 and rx1

depends on your application, if you want to do momentum balances for a current with typical velocities of 10 cm/s then 7 cm/s of PGE doesn't sound good. A few 2 cent points to keep in mind: less vertical levels means less convergence although it will help with PGE, there are a few parameters that af...
by rduran
Mon Feb 25, 2013 12:45 am
Forum: ROMS Discussion
Topic: fast currents in my roms model
Replies: 10
Views: 3630

Re: fast currents in my roms model

thanks for sharing! it's always good to earn in experience
by rduran
Fri Feb 15, 2013 4:51 pm
Forum: ROMS Documentation
Topic: Your favorite modeling book
Replies: 1
Views: 2404

Your favorite modeling book

I would very much appreciate if model developers and advanced users could chip in to answer:

If you were to pick one ocean modeling book, which one would it be?


thanks many,

Rodrigo.

p.s. I hope this will result in a nice reference list, I haven't found one already.
by rduran
Wed Feb 13, 2013 12:57 am
Forum: ROMS Discussion
Topic: fast currents in my roms model
Replies: 10
Views: 3630

Re: fast currents in my roms model

the proper diagnostic test is to run your model with zero everything (ie no forcing no initial velocities) and only a horizontally-constant vertical (stable) profile of density. perhaps constant salinity and a typical temperature profile will do if temperature controls density in your region. any ve...
by rduran
Tue Feb 12, 2013 1:03 am
Forum: ROMS Discussion
Topic: fast currents in my roms model
Replies: 10
Views: 3630

Re: fast currents in my roms model

with such dx,dsigma and total depth it is possible you bathymetry would need much smoothing, do you have a slope? how do your r-factors look? a false pressure gradient certainly produces currents.
by rduran
Sat Feb 02, 2013 12:43 am
Forum: ROMS Discussion
Topic: Problem with the river discharge
Replies: 6
Views: 2112

Re: Problem with the river discharge

I'm wondering if changing the vertical profile of the river discharge would help?
by rduran
Fri Jan 25, 2013 1:11 am
Forum: ROMS Discussion
Topic: How to calculate the residence time
Replies: 5
Views: 4770

Re: How to calculate the residence time

How about seeding some Lagrangian floats to see if any left and came back? There is another Lagrangian technique that quite frankly I find a tremendous tool, I believe it will become a very popular with time. It might be useful in your applications since it allows you to measure total volume of wate...
by rduran
Sun Jan 13, 2013 12:46 am
Forum: ROMS Discussion
Topic: What to correct to keep ROMS from blowing up?
Replies: 23
Views: 8837

Re: What to correct to keep ROMS from blowing up?

then of course going through your output is always a good idea: GET_NGFLD - temperature western boundary condition, t = 1 00:00:00 (Rec=0002, Index=1, File: cefs_upwelling_bry.nc) (Tmin= 0.0000 Tmax= 183.0000) (Min = 0.00000000E+00 Max = 2.75380093E+01) GET_NGFLD - salinity western boundary conditio...
by rduran
Sun Jan 13, 2013 12:39 am
Forum: ROMS Discussion
Topic: What to correct to keep ROMS from blowing up?
Replies: 23
Views: 8837

Re: What to correct to keep ROMS from blowing up?

your Maximum barotropic Courant Number = 6.22825707E-01 is not that far from one, from browsing the forum it seems the first things to check are lowering your time step and Nans in input files as well of zero bathymetric values which u already looked into.smoothing the bathymetry is for numerical co...
by rduran
Sat Dec 29, 2012 4:02 am
Forum: ROMS Discussion
Topic: How can I decide the most appropriate parameter
Replies: 7
Views: 1701

Re: How can I decide the most appropriate parameter

nan in input files or the need to reduce the time step are probable culprits
by rduran
Sun Dec 23, 2012 4:03 am
Forum: ROMS Discussion
Topic: How can I decide the most appropriate parameter
Replies: 7
Views: 1701

Re: How can I decide the most appropriate parameter

Anything with a T for true can have an F for false i.e. your choice. There is no way (that I know of) around sensitivity tests when starting a new application, you should not expect to get it right the first time because you probably wont. You may want to design an experiment to test the parameters ...
by rduran
Sat Dec 15, 2012 2:06 am
Forum: ROMS Discussion
Topic: Question about particle tracking
Replies: 17
Views: 3658

Re: Question about particle tracking

in my Experience every six hours worked ok, it depend on the timescales u are interested in. I don't think any post-processing particle tracker can be expected to produce the exact same solution as the ROMS calculations, unless run for every ROMS time step...but the advantages come in being able to ...
by rduran
Wed Dec 12, 2012 3:47 am
Forum: ROMS Discussion
Topic: Question about particle tracking
Replies: 17
Views: 3658

Re: Question about particle tracking

Is anyone aware of any studies that compare this "offline" tracking approach, with letting ROMS do the tracking? Assuming ROMS updates the positions at each timestep, the two results must diverge noticeably at some point. For example in shallow water with wind. Rivas and Samelson (2011) did some of...
by rduran
Wed Aug 22, 2012 2:43 pm
Forum: ROMS Ice
Topic: Double time in avg file
Replies: 6
Views: 3629

Re: Double time in avg file

Did you try navg = 120 and nhis = 120?
by rduran
Wed Aug 22, 2012 12:59 am
Forum: ROMS Ice
Topic: Double time in avg file
Replies: 6
Views: 3629

Re: Double time in avg file

120 nHIS Number of timesteps between the writing fields into history file. 0 ntsAVG Starting timestep for the accumulation of output time-averaged data. 60 nAVG Number of timesteps between the writing of Well, the diagnostic terms involve a time-integral like the averages files. I usually recommend...
by rduran
Tue Aug 14, 2012 1:34 am
Forum: ROMS Discussion
Topic: ROMS Particle Tracking
Replies: 5
Views: 3201

Re: ROMS Particle Tracking

This is an interesting discussion, are there any news regarding the discussed inaccuracies?

thanks,

Rodrigo
by rduran
Tue Aug 14, 2012 12:55 am
Forum: ROMS Documentation
Topic: Details for floats
Replies: 2
Views: 2616

Re: Details for floats

many thanks Kate, that all makes sense.
by rduran
Sat Aug 11, 2012 2:25 pm
Forum: ROMS Documentation
Topic: Details for floats
Replies: 2
Views: 2616

Details for floats

I am looking for details of ROMS' floats, I would like to put together a brief description. So far I have found in the manual (Figure 11: Flow chart of the model main program) that floats are stepped in time every baroclinic time step. Presumably the latest time-stepped 3D velocity is integrated to ...
by rduran
Thu Aug 09, 2012 2:23 am
Forum: ROMS Problems
Topic: what's wrong with temperature from two version of roms code
Replies: 7
Views: 3029

Re: what's wrong with temperature from two version of roms c

Shou

Could you please let us know what differences you find in your Build/*.f90 files?

It is interesting to learn what configuration change would cause the differences.

thanks,

Rodrigo
by rduran
Tue Aug 07, 2012 4:52 am
Forum: ROMS Problems
Topic: what's wrong with temperature from two version of roms code
Replies: 7
Views: 3029

Re: what's wrong with temperature from two version of roms c

Shou,

One place to start with would be comparing the CPP defs, do you have them available?

Rodrigo.
by rduran
Tue Jul 03, 2012 12:40 am
Forum: ROMS Discussion
Topic: pressure gradient in the diagnostic output
Replies: 4
Views: 2644

Re: pressure gradient in the diagnostic output

I dont think THE baroclinic pressure gradient(bpg) is included in a vertically averaged pressure gradient. It would need to have vertical dependence to be THE bpg. Rather there is a term of baroclinic nature included in the uv_bar_prsgrd terms to make the barotropic-baroclinic coupling work.
by rduran
Sat May 19, 2012 1:59 am
Forum: ROMS Discussion
Topic: How can make sure proper river point position in ROMS
Replies: 15
Views: 7194

Re: How can make sure proper river point position in ROMS

Reminds me when I was starting out with matlab: you need to pay attention to the error messages. In this case the dimensions are not working out. type whos to see the size of your variables. type help horzcat to see what it means. Another option is copy-paste the error message into google, youd be s...
by rduran
Wed May 16, 2012 1:49 am
Forum: ROMS Discussion
Topic: How can make sure proper river point position in ROMS
Replies: 15
Views: 7194

Re: How can make sure proper river point position in ROMS

how bout sign(y_1)*geomean(abs(y_i))? (need y_i < 0 for all i)
by rduran
Wed May 16, 2012 1:40 am
Forum: ROMS Problems
Topic: Zeta following the bathymetry and velocity profiles
Replies: 2
Views: 1157

Re: Zeta following the bathymetry and velocity profiles

If you are running without forcing and just an arbitrary horizontally-constant stratification then it is the pressure gradient error - not necessarily surprising. If this is a regular run, you have baroctropic flow following f/h contours - not necessarily surprising. Granted that 0.5m/s 3km deep is ...
by rduran
Sat May 05, 2012 4:27 am
Forum: ROMS Ice
Topic: ice code hanging / freezing ...
Replies: 7
Views: 4686

Re: ice code hanging / freezing ...

that's what happens in realistic simulations of ice!
by rduran
Thu Apr 05, 2012 4:00 am
Forum: ROMS Discussion
Topic: modeling internal tides in a canyon: solution not converged
Replies: 7
Views: 2428

Re: modeling internal tides in a canyon: solution not conver

I would continue asking before spending too much time creating grid files with different resolutions. Other possibilities are sensitivity to boundary conditions. What is your vertical resolution? In general, the finer the resolution the longer the spin up time (allows for (more) higher mode waves, s...
by rduran
Thu Apr 05, 2012 2:56 am
Forum: ROMS Discussion
Topic: modeling internal tides in a canyon: solution not converged
Replies: 7
Views: 2428

Re: modeling internal tides in a canyon: solution not conver

Possibility:

by reducing your time step you are able to resolve different types of waves possibly related to spin up.

Convergence also depends on spatial grid refinement, what is your spatial resolution?
by rduran
Tue Mar 27, 2012 1:19 am
Forum: ROMS Problems
Topic: ROMS blows-up after a few time-steps
Replies: 5
Views: 1990

Re: ROMS blows-up after a few time-steps

Off topic comment/question: When doing a pressure gradient test (i.e. all forcing and initial fields zero except for an arbitrary stratification), initially velocities are due to pressure gradient error but eventually the advection and difussion of T,S will also be involved in the development of vel...
by rduran
Thu Mar 15, 2012 5:11 pm
Forum: ROMS Documentation
Topic: PV and stuff conservation
Replies: 1
Views: 2005

PV and stuff conservation

Could someone recommend me literature regarding numerical conservation of PV, density... etc ? Books, articles, related to ROMS, or in general regarding numerical ocean models are all welcome. Thank you very much in advanced!! R. p.s. lagrangian context is specially welcome but eulerian also very we...
by rduran
Fri Mar 09, 2012 7:19 pm
Forum: ROMS Wish List
Topic: ROMS Wish List
Replies: 6
Views: 3723

Re: ROMS Wish List

Along-path relative and potential vorticity saved as output into the FLT00.nc file for any and all kinds of floats (just as temp, salt, lon, etc are saved). Planetary is straightforward from lat so no need for that one.
by rduran
Tue Feb 14, 2012 3:58 am
Forum: ROMS Problems
Topic: Post-compilation problems with ROMS
Replies: 6
Views: 2155

Re: Post-compilation problems with ROMS

do you have to recompile every time you edit them? Seems you should always stick to the bry conditions when you are restarting at least: https://www.myroms.org/forum/viewtopic.php?f=17&t=2411&hilit=NLM_LBC But as far as running different experiments with the same executable and different BC in the ...
by rduran
Sat Feb 11, 2012 4:36 am
Forum: ROMS Documentation
Topic: Shchepetkin 2010
Replies: 2
Views: 2779

Re: Shchepetkin 2010

Thank you very much!
by rduran
Sat Feb 11, 2012 4:29 am
Forum: ROMS Discussion
Topic: Problem with ROMS wetting/drying and turbulence model(s)
Replies: 8
Views: 3123

Re: Problem with ROMS wetting/drying and turbulence model(s)

I dont want to allow the bustr term to change the sign of u_new. This is unphysical. How can the extraction of energy make the current go the other way? Greg Holloway would argue that: We consider eddies interacting with bottom topography. It is seen that traditional ‘‘eddy viscosity’’ and/or ‘‘top...
by rduran
Fri Feb 10, 2012 3:53 am
Forum: ROMS Documentation
Topic: Shchepetkin 2010
Replies: 2
Views: 2779

Shchepetkin 2010

I would like to reference the new Stretching function (Vstretching =4) which is referred to as Shchepetkin 2010 but I cannot find this paper. Please advise.

thanks!
by rduran
Tue Jan 31, 2012 7:27 pm
Forum: ROMS Information
Topic: Nudge dye to NaN BC
Replies: 6
Views: 3555

Re: Nudge dye to NaN BC

Thank you very much, all of this is good to know. My dissertation's first two parts are 1) a kinematic description of the Eulerian and Lagrangian flow for a poleward undercurrent off the US West coast (41 to 48 N) as seen through a ROMS simulation and 2) a follow up dynamical description. Mean lagra...
by rduran
Tue Jan 31, 2012 2:38 am
Forum: ROMS Information
Topic: Nudge dye to NaN BC
Replies: 6
Views: 3555

Re: Nudge dye to NaN BC

Dr. Arango, Thank you for your answer. I understand the discontinuity problem you mention, that is why the solution ended involving either keeping the Lagrangian Labels continuous by nesting in bigger domain or by using an alternative method (regular floats in this case). Regarding the meaning of La...
by rduran
Tue Jan 31, 2012 1:11 am
Forum: ROMS Information
Topic: Nudge dye to NaN BC
Replies: 6
Views: 3555

Re: Nudge dye to NaN BC

This does not make any physical sense to me That might be because these are relatively unusual dyes, really they are Lagrangian Labels giving the initial position of all water parcels in the domain defined and advected as passive tracers. There is not a way in ROMS to have computations with NaNs or...
by rduran
Mon Jan 30, 2012 7:54 pm
Forum: ROMS Information
Topic: Nudge dye to NaN BC
Replies: 6
Views: 3555

Nudge dye to NaN BC

Hi, I would like for my dyes to get nudged to NaN values with incoming flow. I tried nudging with boundary dye values set to 1e37 but they get read as 0 (zero). I also tried reducing boundary conditions to only radiation with no nudging, but that was not good enough, I need incoming water parcels to...
by rduran
Fri Dec 23, 2011 5:42 pm
Forum: ROMS Information
Topic: Floats not being read
Replies: 1
Views: 1697

Re: Floats not being read

I found a work around that worked following https://www.myroms.org/forum/viewtopic.php?f=19&t=2356 I commented ! Report input parameters. !----------------------------------------------------------------------- ! ! IF (Lwrite) THEN ! DO ng=1,Ngrids ! IF (Lfloats(ng)) THEN ! IF (ncount(ng).ne.Nfloats...
by rduran
Thu Dec 22, 2011 11:55 pm
Forum: ROMS Information
Topic: Floats not being read
Replies: 1
Views: 1697

Floats not being read

I am using latest ROMS (svn 583). For some reason my floats.in file is not being read properly: READ_FltPar - Inconsistent number of floats to process: 0 888 change input script. But I have checked by floats.in and everything looks right, I even checked for tabs that would not allow for the number o...
by rduran
Sun Nov 13, 2011 7:17 pm
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Hernan, Recap: When I build -noclean after commenting the lines as suggested above things work fine. Follow up experiments: I updated the code and compiled the same case and tried running with no further modifications, now I get the following error: LBC_GETATT - error while reading global attribute:...
by rduran
Tue Nov 08, 2011 4:10 pm
Forum: ROMS Documentation
Topic: Pressure gradient documentation conundrum and a request
Replies: 2
Views: 3219

Pressure gradient documentation conundrum and a request

In the current cppdefs ( svn $Id: cppdefs.h 572 2011-10-18 17:56:01Z arango $ ) the pressure gradient options are: ** Pressure gradient algorithm OPTIONS: ** ** ** ** If no option is selected, the pressure gradient term is computed using ** ** standard density Jacobian algorithm. Notice that there a...
by rduran
Wed Oct 19, 2011 12:51 am
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Hernan, will do in about two weeks.
by rduran
Tue Oct 18, 2011 3:45 am
Forum: ROMS Bugs
Topic: error while reading global attribute
Replies: 2
Views: 1741

Re: error while reading global attribute

I believe the answer (at least partial) to your question is here:

viewtopic.php?f=17&t=2411
by rduran
Sun Oct 16, 2011 7:50 pm
Forum: ROMS Discussion
Topic: speaking of advection and spurious dyes
Replies: 6
Views: 2088

Re: speaking of advection and spurious dyes

John, thank you very much! If I do svn up I get: At revision 571 The varinfo.dat I am using is the one that came with revision 571 however it reads: svn $Id: varinfo.dat 567 2011-09-19 22:43:36Z arango $ Yeah that makes sense (of course ... again!!), now it reads: LBC(isTvar) == RadNud RadNud Clo Ra...
by rduran
Sat Oct 15, 2011 10:21 pm
Forum: ROMS Discussion
Topic: speaking of advection and spurious dyes
Replies: 6
Views: 2088

Re: speaking of advection and spurious dyes

John, thank you very much! You are right, I should be checking my stdOut more carefully and it does make sense it would be something to do with the bry conditions (of course!)... For some reason ROMS is only reading the bry conditions for the first dye and it is invoking ROMS/Functionals/ana_nudgcoe...
by rduran
Fri Oct 14, 2011 9:46 pm
Forum: ROMS Discussion
Topic: speaking of advection and spurious dyes
Replies: 6
Views: 2088

Re: speaking of advection and spurious dyes

Thank you for you answer Lyon. I do have a river but the problems happen with and without point source for the dyes. The boundary conditions (double-checked to be right) are given by the definition below. The max min values for my dyes are: -129<dye_01<-123.7 (Longitude) 48<dye_02<41 (Latitude) min(...
by rduran
Fri Oct 14, 2011 5:29 am
Forum: ROMS Discussion
Topic: speaking of advection and spurious dyes
Replies: 6
Views: 2088

speaking of advection and spurious dyes

I am advecting three dyes one looks great, one is terrible and the third is less than acceptable. This is during the same run and all options for the three dyes are the same. I had done a similar run before and it worked nicely. I have double checked my bry and ini and forcing files it is all as it ...
by rduran
Tue Oct 11, 2011 9:56 pm
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Im not sure whether this would introduce a character (as mentioned above) but I got this warning when compiling ROMS 3.6 so I thought I would mention it in case it is helpful: ROMS/Utility/state_addition.F > /home/server/student/homes/rduran/ore/Build/state_addition.f90 ROMS/Utility/state_addition.F...
by rduran
Tue Oct 11, 2011 12:40 am
Forum: ROMS Discussion
Topic: outflow at the open boundary condition
Replies: 6
Views: 1956

Re: outflow at the open boundary condition

there is something called VOLCON (volume conservation) I believe there is info somewhere in the forum for VOLCON (and bry conditions associated with it) .. or was the info in the .in file? I'm not sure
by rduran
Mon Oct 10, 2011 3:22 pm
Forum: ROMS Discussion
Topic: advection and spurious mixing
Replies: 16
Views: 5211

Re: advection and spurious mixing

thank you very much Hernan.

Just for the record my case is a realistic simulation of the Oregon coast (simulating 2005).

R.
by rduran
Mon Oct 10, 2011 1:39 am
Forum: ROMS Discussion
Topic: advection and spurious mixing
Replies: 16
Views: 5211

Re: advection and spurious mixing

Should I add an item to the wish list?
by rduran
Sat Oct 08, 2011 6:32 pm
Forum: ROMS Discussion
Topic: advection and spurious mixing
Replies: 16
Views: 5211

advection and spurious mixing

I have a few questions regarding spurious mixing in ROMS-Rutgers: 1) Is the cppdefs option TS_U3ADV_SPLIT something similar to what is described here: Marchesiello, P., Debreu, L., Couvelard, X. 2009. Spurious diapycnal mixing in terrain-following coordinate models: The problem and a solution. Ocean...
by rduran
Sat Oct 08, 2011 3:50 am
Forum: ROMS Usage
Topic: periodic boundary condition
Replies: 16
Views: 4366

Re: periodic boundary condition

Good to know, thanks!
by rduran
Thu Oct 06, 2011 1:10 am
Forum: ROMS Usage
Topic: periodic boundary condition
Replies: 16
Views: 4366

Re: periodic boundary condition

Im just curious how the solution of imposing a pressure gradient via barotropic velocities would compare with imposing a pressure gradient via sloping isopycnals in the boundary conditions or even how about both. Any thoughts?
by rduran
Tue Oct 04, 2011 7:40 pm
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

First I tried erasing all spaces and introducing them one by one with spacebar in the boundary conditions of my .in file, and I got the same error, it does seem that the character has been introduced somewhere else. Please note I have exclusively used vi editor in linux to work with my .in file Seco...
by rduran
Tue Oct 04, 2011 6:24 pm
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Thanks for the tip I will change from using Rad for TKE.

Code: Select all

wyam.OCE.ORST.EDU 104: uname -a
Linux wyam.OCE.ORST.EDU 2.6.9-55.ELlargesmp #1 SMP Fri Apr 20 16:46:56 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
by rduran
Tue Oct 04, 2011 5:21 pm
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Re: Trouble restarting with roms 3.6

Hernan, Thank you for your time/answer. Both the HIS and RST files I used were created with ROMS 3.6. This has been an "all-ROMS3.6" run. Indeed this new global attribute is found with ncdump here is what it looks like: Restart file :NLM_LBC = "\n", "EDGE: WEST SOUTH EAST NORTH \n", "zeta: Cha Cha C...
by rduran
Tue Oct 04, 2011 4:40 am
Forum: ROMS Problems
Topic: Trouble restarting with roms 3.6
Replies: 17
Views: 6414

Trouble restarting with roms 3.6

Im using ROMS 3.6 revision 571 I followed the instructions for restarting as in https://www.myroms.org/forum/viewtopic.php?f=14&t=599, in different ways: 1.a) Using a history file with NNREC = -1 1.b) Using the fields of a history file to write a netcdf file using the same script I used for my origi...
by rduran
Tue Sep 20, 2011 3:36 am
Forum: ROMS Wish List
Topic: some of the standard output in netcdf
Replies: 1
Views: 2660

some of the standard output in netcdf

I think that this might be a relatively easy and quite useful feature: There are several good reasons why one would want to plot time series of kinetic or potential energy, volume, or maximum velocities ... all that info is available in the out file but it is not straightforward to put it into vecto...
by rduran
Mon Sep 12, 2011 10:23 pm
Forum: ROMS Ecosystem
Topic: DSTART
Replies: 1
Views: 1897

Re: DSTART

For sure you would need to change the initial conditions. This post might help:

viewtopic.php?f=14&t=599
by rduran
Mon Aug 01, 2011 10:11 am
Forum: ROMS Discussion
Topic: Hydrostatic consistency and the rx0 rx1 factors
Replies: 4
Views: 3225

Re: Hydrostatic consistency and the rx0 rx1 factors

Andre, Mathieu,

thanks for the helpful replies.
by rduran
Tue Jul 12, 2011 8:36 am
Forum: ROMS Discussion
Topic: Hydrostatic consistency and the rx0 rx1 factors
Replies: 4
Views: 3225

Hydrostatic consistency and the rx0 rx1 factors

It is well known that the bathymetry should be smoothed to avoid fictitious pressure gradients and that is where the conditions 3 < rx1 (Haney) < 7 0 < rx0 (Beckman and Haidvogel) < 0.4 come from. in Robert Miller's "Numerical modeling of Ocean Circulation" 2007 Cambridge University Press, one can r...
by rduran
Thu Jul 07, 2011 11:14 pm
Forum: ROMS Problems
Topic: Salinity goes from normal to nan
Replies: 2
Views: 998

Re: Salinity goes from normal to nan

Kate thank you, as usual you have been very helpful. Reducing the time step seems to be working. I had considered this possibility but I thought my Courant numbers to be small enough so I (prematurely) discarded that option. Here are my previous and new values: 364,366c384,386 < Minimum barotropic C...
by rduran
Thu Jul 07, 2011 10:12 am
Forum: ROMS Problems
Topic: Salinity goes from normal to nan
Replies: 2
Views: 998

Salinity goes from normal to nan

My model blew up in first step ... after inspecting the initial conditions (first file to be written out by roms) I noticed all my 3D array for initial salinity was nan (or more precisely whatever that _fill_value was (I did salt(salt>1e10)=nan in matlab to plot and inspect file) I also noticed that...
by rduran
Mon Jun 13, 2011 4:52 pm
Forum: ROMS Discussion
Topic: trace the float trajectory back
Replies: 8
Views: 3475

Re: trace the float trajectory back

Then again it could refer to the other non-linear juicy stuff ...
by rduran
Sun Jun 12, 2011 11:52 pm
Forum: ROMS Information
Topic: weird C-preprocessing Options issue
Replies: 2
Views: 2501

Re: weird C-preprocessing Options issue

Thanks Kate, good to know globaldefs.h does these kind of things. Im not sure how

Code: Select all

#ifdef TS_U3ADV_SPLIT
would prove positive (and that was the only define TS_C4VADVECTION part that I found) , but I did find the problem to be solved when I commented the diagnostics_uv line properly ...
by rduran
Tue Jun 07, 2011 9:03 am
Forum: ROMS Information
Topic: weird C-preprocessing Options issue
Replies: 2
Views: 2501

weird C-preprocessing Options issue

I have a weird thing going on. It does not happen with roms 3.0 but it does with roms 3.5 My cppdefs.h is: ================================ #define OREGON_OBC /* Oregon, open boundary conditions (AK: 7 #if defined OREGON_OBC /* ** Options for the Oregon case: Open BC */ #define UV_ADV /* turn ON ad...
by rduran
Thu Mar 17, 2011 7:09 pm
Forum: ROMS Installation
Topic: Illegal domain partition
Replies: 4
Views: 2072

Re: Illegal domain partition

Yes there was a tab, thanks.
by rduran
Thu Mar 17, 2011 3:49 am
Forum: ROMS Installation
Topic: Illegal domain partition
Replies: 4
Views: 2072

Re: Illegal domain partition

Hi, This is what I have put in my .in file: ! Grid dimension parameters. See notes below in the Glossary for how to set ! these parameters correctly. Lm == 248 ! Number of I-direction INTERIOR RHO-points Mm == 294 ! Number of J-direction INTERIOR RHO-points N == 31 ! Number of vertical levels In mat...
by rduran
Mon Mar 14, 2011 2:10 am
Forum: ROMS Installation
Topic: Illegal domain partition
Replies: 4
Views: 2072

Illegal domain partition

Can someone help me understand what I need to do: if i try running: ./oceanS < ./User/External/RomsInit_03_Jul1.in I get this error: Tile partition information for Grid 01: 0000x0000x0000 tiling: 001x001 tile Istr Iend Jstr Jend Npts 0 1 0 1 0 0 INP_PAR - domain decomposition error in input script f...
by rduran
Fri Mar 11, 2011 2:04 am
Forum: ROMS Adjoint
Topic: Backwards trajectory
Replies: 7
Views: 3881

Re: Backwards trajectory

by rduran
Thu Sep 30, 2010 1:32 am
Forum: ROMS Ecosystem
Topic: how to add a continuous dye?
Replies: 4
Views: 3451

Re: how to add a continuous dye?

I heard someone that wanted to have a continuous release of dye used biological tracers by de-coupling them (i.e. no phytoplancton eating nutrients; make the nutrient a conservative tracer I guess). I'm not sure of the details. I have a question of my own: If you have an open boundary with positive ...
by rduran
Wed Sep 29, 2010 1:29 am
Forum: ROMS Ecosystem
Topic: how to add a continuous dye?
Replies: 4
Views: 3451

Re: how to add a continuous dye?

Hi,

Remind me how you defined continuous die?
by rduran
Mon Aug 23, 2010 9:29 am
Forum: ROMS Sediment
Topic: How to set the river_time
Replies: 5
Views: 3188

Re: How to set the river_time

Does this mean that my forcing netcdf files need to be modified if I want to start running my model latter in the year? In other words: I have been running a model starting Jan 1st 2005, now I want it to start Apr 1st 2005, does setting DSTART = 90 (instead of 0), without changing the forcing file d...
by rduran
Fri Aug 20, 2010 10:31 am
Forum: ROMS Usage
Topic: Lagrangean labels or dye with no mixing
Replies: 8
Views: 3082

Re: Lagrangean labels or dye with no mixing

Rachael, That what indeed useful information thanks, and it came just hours after I started wondering why my model had crashed too. By day 148 output garbage from dye_03 (depth label) was too much for the writing routine to handle. Similar to what happened to you. Im curious to learn more about inst...
by rduran
Tue Aug 17, 2010 2:48 am
Forum: ROMS Usage
Topic: Lagrangean labels or dye with no mixing
Replies: 8
Views: 3082

Re: Lagrangean labels or dye with no mixing

Thanks for you reply. I am using MY25_MIXING I changed AKT values as suggested. My .out file now gives me 0.0000E+00 Akt_bak(03) . . . 0.0000E+00 Akt_bak(05) Which are the values for dye_01 through dye_03. Am I good to go? If I change into another closure (LMD or GLS) scheme, then I would have to wo...
by rduran
Fri Aug 13, 2010 1:46 am
Forum: ROMS Usage
Topic: Lagrangean labels or dye with no mixing
Replies: 8
Views: 3082

Re: Lagrangean labels or dye with no mixing

Thanks for the replies, I have a couple of doubts, As for horizontal mixing, Im not sure how I can set TNU2 to zero only for the passive tracers but not salinity or temperature. I saw the tutorial for ocean.in but don't understand [1:NAT+NPT,Ngrids] Is the first value for NAT and the second for NPT?...
by rduran
Thu Aug 12, 2010 8:25 am
Forum: ROMS Usage
Topic: Lagrangean labels or dye with no mixing
Replies: 8
Views: 3082

Lagrangean labels or dye with no mixing

Hi, I would like to do some experiments with lagrangean labels, i.e. 3 dyes defined as follow: X (x,y,z,t=0)=x Y (x,y,z,t=0)=y Z (x,y,z,t=0)=z where x is longitude, y is latitude, z is depth, t is for time of course. I would like to see where these labels are advected to, but I would not want them t...
by rduran
Mon May 17, 2010 7:05 pm
Forum: ROMS Trivia
Topic: Sock news
Replies: 9
Views: 4571

Re: Sock news

I like em. Pretty cool.

Excuse my ignorance though, what were the strings for?

Rodrigo.
by rduran
Thu Jan 28, 2010 3:00 am
Forum: ROMS Discussion
Topic: trace the float trajectory back
Replies: 8
Views: 3475

Re: trace the float trajectory back

Hernan, With regards to the juicy non-linear stuff, I believe that's what Rivas & Samelson were describing in their paper (which I mentioned above) when they said: "Note that the presence of diffusion and mixing in the model introduces an in- evitable ambiguity into any attempt to analyze Lagrangian...
by rduran
Thu Jan 28, 2010 2:37 am
Forum: ROMS Discussion
Topic: trace the float trajectory back
Replies: 8
Views: 3475

Re: trace the float trajectory back

Val`ere, I'm not sure what it was Petrovsky was showing with this example but I'm sorry to say that it is certainly not true that the solution "explodes" for -epsilon<0. Assuming you meant k>0 (so that your arguments make more sense), you can in fact, choose any t<0 whatsoever as long as it is in IR...
by rduran
Tue Jan 26, 2010 2:19 am
Forum: ROMS Discussion
Topic: trace the float trajectory back
Replies: 8
Views: 3475

Re: trace the float trajectory back

Zhaoqian and Valere: You can solve the equations (i.e. run the model) make sure you get all the components of velocity in all of your domain. Once finished you can choose a 'particle' that interests you and trace it back. First find the velocity at each particle's location (interpolate from your vel...