Search found 24 matches

by yadusharma
Sun Sep 29, 2019 4:32 pm
Forum: ROMS Discussion
Topic: SWAN can't use more than one CPU
Replies: 16
Views: 5624

Re: SWAN can't use more than one CPU

Hi All, I am also not able to provide more than one processor for the SWAN model. I am trying to run the SANDY_Coupled Test case and I am getting the following error. Timing for main: time 2012-10-28_12:01:00 on domain 2: 2.76283 elapsed seconds Timing for main: time 2012-10-28_12:01:00 on domain 2:...
by yadusharma
Thu Apr 04, 2019 1:05 pm
Forum: ROMS Discussion
Topic: Regarding ROMS "zeta" and surface geostrophic currents
Replies: 0
Views: 404

Regarding ROMS "zeta" and surface geostrophic currents

Hi Forum, I have a question regarding the calculation of the surface geostrophic currents from ROMS as U geo =(g/f)X delta(SSHA) [Please see the attached complete equation] Can I directly use the "zeta" field from ROMS? Or Do I have to subtract the Mean Dynamic Topography from ROMS zeta? :shock: Fro...
by yadusharma
Thu Oct 11, 2018 6:37 am
Forum: ROMS Discussion
Topic: Regarding Sea surface height in ROMS
Replies: 1
Views: 707

Regarding Sea surface height in ROMS

Hi All,

I want to understand how sea surface elevation(zeta) is calculated in ROMS, I searched in the Wikiroms but did not get much information :cry: :?:. I would be grateful if anybody can suggest that from where I can find these details.

Thanking you all in advance.
by yadusharma
Wed May 02, 2018 12:06 pm
Forum: ROMS Results
Topic: Regarding salt flux parameterization
Replies: 7
Views: 2490

Re: Regarding salt flux parameterization

Hi Kate,
Thanks for your reply. I have one more question, what value I should choose for Tnudg (TNUDG) in days?. If I want to use the SCORRECTION. Thanks again for your support and time.
by yadusharma
Mon Mar 26, 2018 9:17 am
Forum: ROMS Results
Topic: Regarding salt flux parameterization
Replies: 7
Views: 2490

Re: Regarding salt flux parameterization

Hi Kate, I found from the ROMS wiki that the surface salt flux with the RELAXATION is calculated as follows, " F_mod(:,:) = - Tnudg(isalt) * Hz(:,:,N) * [S_mod(:,:,N) - SSS(:,:)] where Tnudg is a nudging time scale and Hz(:,:,N) is upper level thickness and Sea surface salinity (SSS) climatology". B...
by yadusharma
Wed Jan 24, 2018 4:59 am
Forum: ROMS Results
Topic: Regarding salt flux parameterization
Replies: 7
Views: 2490

Re: Regarding salt flux parameterization

Hi Kate Thanks for your reply. :) . I have one more question. :shock: I have rivers in my model domain and also i have activated the BULK_FlUX option. I just want to know that, is there a way to "keep the surface freshwater flux unaffected" by the river inputs (Low Salinity and Temperature)which i w...
by yadusharma
Sat Jan 20, 2018 12:29 pm
Forum: ROMS Results
Topic: Regarding salt flux parameterization
Replies: 7
Views: 2490

Regarding salt flux parameterization

Hi all, I was trying to understand the salt flux parameterization in ROMS. From the literature, I understand that there are virtual salt flux are real freshwater flux methods. Which one ROMS use when BULK_FLUX is on?. How can I get more information in this regard?. I would be grateful for any sugges...
by yadusharma
Sun Jan 07, 2018 6:27 am
Forum: ROMS Problems
Topic: Abnormal values of salinity Diagnostics Variables
Replies: 0
Views: 979

Abnormal values of salinity Diagnostics Variables

Hi All, I want to calculate the salinity budget in my domain. I activated the DIAGNOSTICS_TS, but the values of salt_hadv and salt_vadv terms look very high :shock: compared to the other terms. What could be the possible reasons for this? :roll: Any suggestions would be of great help. Here I am atta...
by yadusharma
Sat Jan 06, 2018 7:06 am
Forum: ROMS Results
Topic: Latteral boundary condition problem
Replies: 11
Views: 63190

Re: Latteral boundary condition problem

Hi John,

I want to try giving daily boundary values of tracers (to try Nudging) from HYCOM in my model domain for inter-annual simulations. I would be grateful if you can share the matlab code (which you mentioned here)for handling the HYCOM data.

Thanks in advance.
by yadusharma
Sat Dec 16, 2017 12:07 pm
Forum: ROMS Discussion
Topic: Regarding the precipitation forcing in ROMS
Replies: 0
Views: 827

Regarding the precipitation forcing in ROMS

Hi All, I have a question regarding the precipitation forcing. While preparing the Precipitation forcing file for my ROMS model, I am confused with the range of rainfall values between the TRMM and GPCP daily data. Both data files say that both are in units of mm/day. Here I am attaching the compari...
by yadusharma
Mon Jun 05, 2017 5:42 am
Forum: ROMS Discussion
Topic: Regarding the salt flux experiments
Replies: 6
Views: 1457

Re: Regarding the salt flux experiments

Hi Kate,
I will try your suggestions and will reply. Thanks again for your support :) .
by yadusharma
Sun Jun 04, 2017 6:22 am
Forum: ROMS Discussion
Topic: Regarding the salt flux experiments
Replies: 6
Views: 1457

Re: Regarding the salt flux experiments

Hi Kate, As you suggested, I turned off EMINUSP option to prevent evaporation, but I got an error message asking for swflux as follows. INQUIRE - unable to find requested variable: swflux in files: Since my experiment is with no evaporation, can i give swflux, which is (E-P) as just (-P with unit co...
by yadusharma
Fri May 12, 2017 10:40 am
Forum: ROMS Discussion
Topic: Regarding the Nudging-Relaxation Timescales
Replies: 3
Views: 1393

Re: Regarding the Nudging-Relaxation Timescales

Hi Kate Thanks for the suggestions, I understand from one of your earlier post also that, I can set the values in set_vbc.F as follows, # elif defined SRELAXATION stflx(i,j,isalt)=-Tnudg(isalt,ng)*Hz(i,j,N(ng))* & # if defined SALTEXPT & 36.0_r8* endif & (t(i,j,N(ng),nrhs,isalt)-sss(i,j)) # endif Am...
by yadusharma
Thu May 11, 2017 10:15 am
Forum: ROMS Discussion
Topic: Regarding the Nudging-Relaxation Timescales
Replies: 3
Views: 1393

Regarding the Nudging-Relaxation Timescales

Hi Forum, I want to set the salinity relaxation for 10 Days and boundary nudging for different timescale say 30 Days. I understand from the forum and documentations that TNUDG is used common for both the cases(If i am not wrong :shock: ). So how can I solve this ?. I would be grateful for any sugges...
by yadusharma
Thu May 04, 2017 7:07 pm
Forum: ROMS Discussion
Topic: Regarding the salt flux experiments
Replies: 6
Views: 1457

Re: Regarding the salt flux experiments

Hi Kate,
Thanks for the suggestion, I will try that. And regarding precipitation, can I provide precipitation with zero values through my netcdf file?
by yadusharma
Thu May 04, 2017 6:54 pm
Forum: ROMS Discussion
Topic: Regarding the salt flux experiments
Replies: 6
Views: 1457

Regarding the salt flux experiments

Hi Forum, I wanted to do experiments with the salinity flux, for this I want to run by making the precipitation zero and different run with evaporation zero. Will it be correct if I provide precipitation with zero values through my netcdf file?. Since I am using bulk flux how can i turn off evaporat...
by yadusharma
Sat Feb 13, 2016 2:15 pm
Forum: ROMS Problems
Topic: Regarding the freshwater flux in ROMS
Replies: 3
Views: 1998

Re: Regarding the freshwater flux in ROMS

Hi Kate, I couldn't reply soon. :roll: I have open boundaries in my domain and rivers are entering from the grid points in the land-ocean boundary. I am using BULK_FLUXES option and also with EMINUSP. With the EMINUSP option switched on, I didn't get your point that "we don't evaporate at the surfac...
by yadusharma
Sun Dec 27, 2015 4:44 am
Forum: ROMS Discussion
Topic: Problem while loading Octant
Replies: 3
Views: 938

Re: Problem while loading Octant

Hi Matheus, Thanks for your kind reply, I had started my installation with Pyroms only, I downloaded pyroms from the following link https://github.com/kshedstrom/pyroms/ and installed all the long list of prerequisite packages and their prerequisites, mentioned in that site, with much effort. But un...
by yadusharma
Fri Dec 25, 2015 9:54 am
Forum: ROMS Discussion
Topic: Problem while loading Octant
Replies: 3
Views: 938

Problem while loading Octant

Hi All, I was trying to use the python tool for my preprocessing and I installed Octant successfully. But I am getting the following error while loading the octant libraries. >>> from octant.grid import * >>> from scipy.io import matlab >>> from numpy import * >>> import scipy.interpolate as interpo...
by yadusharma
Sun Dec 06, 2015 1:16 pm
Forum: ROMS Discussion
Topic: Model Initial condition files
Replies: 0
Views: 838

Model Initial condition files

Dear ROMS Users/Developers, When I was trying to use the matlab preprocessing script to create initial condition files from an ocean analysis data sets, After the interpolation, abnormal values of temperature and salinity are getting. The results after running the d_initial.m file is as follows. Wro...
by yadusharma
Thu Nov 26, 2015 5:59 pm
Forum: ROMS Discussion
Topic: Creating Initial Condition using matlab script d_initial.m
Replies: 0
Views: 818

Creating Initial Condition using matlab script d_initial.m

Hi ROMS Users/Developers I am confused about the data which should be given as input for the matlab script provided with ROMS called d_initial.m. Can anybody show the header information of the OA file like what is used in d_initial.m? My Doubts are 1) Should I give an input having regridded to ROMS ...
by yadusharma
Sat Oct 31, 2015 9:13 am
Forum: ROMS Discussion
Topic: Regardign ROMS plotting package
Replies: 0
Views: 766

Regardign ROMS plotting package

Dear Users/Developers, I was trying to plot cross-sections using ROMS plotting package and I could create my preliminary plots. But I was not able to change the X-Axis units from kilometer to degrees. I would be grateful if anybody can point out the options which I have to get use for getting "Degre...
by yadusharma
Thu Oct 01, 2015 1:57 pm
Forum: ROMS Problems
Topic: Regarding the freshwater flux in ROMS
Replies: 3
Views: 1998

Regarding the freshwater flux in ROMS

Hi ROMS Developers/Users, I wanted to add river in my model domain and the forum was very useful for giving an insight to how this is done in ROMS. But I am not clear about how the mass conservation will be taken care of by the model when river discharge is added. Any kind of suggestions will be hel...
by yadusharma
Thu Sep 24, 2015 5:06 pm
Forum: ROMS Discussion
Topic: Calculation of NAVG and NDEFAVG in Leap and NonLeap Years
Replies: 1
Views: 695

Calculation of NAVG and NDEFAVG in Leap and NonLeap Years

Dear ROMS Users/Developers I am still in the beginning stage of understanding the ROMS model and I am confused regarding the calculation of NAVG and NDEFAVG. Things were easier in case of a 360 Days calendar with 30 days in a month set up. Suppose my timestep is 600 seconds and if I want to get Mont...