Ocean Modeling Discussion

Hi, I couple roms with swan, I use MODE NONSTATIONARY TWODIMENSIONAL SET DEPMIN 0.05 INRHOG 1 NAUTICAL COORDINATES SPHERICAL CGRID CURVILINEAR 200 200 EXC 9.999000e+003 & CIRCLE 36 0.02 1.2 60 READGRID COORDINATES 1 '/home/data/grid_coord.grd' 4 0 0 FREE INPGRID WIND CURVILINEAR 0 0 200 200 EXC 9 ...

Hi, i have some question about the bottom roughness. When the d50 is very small, such as 0.005mm,the zo is very small, and it will take the minumum value 5e-5 in ssw_bbl. It will result in a large zeta. how to do it? increase the absolute_zoMIN ? The apparent bottom roughness have an impact on ...

Hi,the MUD_POROS and MUD_TAU_CD are useless in the model ? ! Critical shear for erosion and deposition (N/m2). MUD_TAU_CD == 0.10d0 0.1d0 ! Porosity (nondimensional: 0.0-1.0): Vwater/(Vwater+Vsed). MUD_POROS == 0.5d0 0.9d0 I don't find them in the code, except in sedment_*.h. Thank you!

Hi, when i couple with swan model, the reslut has a warning in the print file. ** Warning : relative frequency resolution (df/f) deviates more ** Warning : than 5% from 10%-resolution. This may be problematic ** Warning : when quadruplets are approximated by means of DIA. I check the swan user ...

Thanks kate. I resolved my problem after dos2unix.

yes,kate. #!/usr/bin/env perl It caused the error. I changed it to #!/bin/env perl, the error is same. When changed it to #!/usr/bin/perl , the error is -bash:/usr/bin/perl^M:bad interpreter:No such file or directory Maybe the system don't support this line or others. When run perl sfmakedepend ,it ...

Hi,kate. Thank you! I check the env in the sfmakedepend, it's "#!/usr/bin/env perl". I changed it to "#!/bin/env perl", the error is still. And my system env is (by env and /usr/bin/env): [zhuzz@localhost ~]$ env HOSTNAME=localhost.localdomain SELINUX_ROLE_REQUESTED= TERM=vt100 SHELL=/bin/bash ...

And i try to use make, the error still. [zhuzz@localhost ~]$ cd src/trunk/ [zhuzz@localhost trunk]$ make : No such file or directory makefile:238: INCLUDING FILE /home/zhuzz/make_macros.mk WHICH CONTAINS APPLICATION-DEPENDENT MAKE DEFINITIONS cp -f /home/zhuzz/Software/netcdf/include/netcdf.mod ...

Hi, i was following instructions in the tutorial to install ROMS first time in LINUX. When i got to changing the build.bash script i did all and executed it and return: [zhuzz@localhost upwelling]$ ./build.bash rm -f -r core *.ipo /home/zhuzz/Projects/upwelling/Build /home/zhuzz/make_macros.mk : No ...

This is surface temperature? How about deeper layers? I would look at the surface heat flux terms. Thanks, this is surface temperature. The deeper layers is the same with the sst except the last layer. I did not open any surface heat flux terms. The deeper layer temperature: temp5.png The last layer ...

Thanks a lot!
I found in my ocean_his the temp of the first step(5 min) is abnormal in an area.Why ? And the depth no problem.
The temp in ini: The first step temp in ocean_his: The first step zeta in ocean_his:

I konw the every focing/boundary file have a time, such as days and hours.And ROMS will lineally interpolate to the model time. The get_cycle will convert the time into day units.I want to konw how the roms to do? For example:(DT=30,NDTFAST=60) In the river discharge, if the river_time is days, the ...

Thanks all!
If i add the nudging, the model need the temp/salt boundary file. I made a boundary file from the WOA monthly data, because of lacking observed data. It only one data per month.It can't meet my needs.
Have any other data or methods?
Thank you!

ZQ,Thank you very much!
1.I will have try to add the nudging.
2 I have added the forcings(river and tide) in my model.The result includes the forings.
Thanks a lot!

Hi,in my model, there is a region where the gradient of temperature/salt is too large. I have checked the bathy and initial. They are no problem. Compared with the measured, the zeta is also good match.Why the gradient of temperature/salt is too large? Thank you! The modle result(the problem in the ...

Thank wilkin and nganju.
I have solved the problem with wilkin's proposal.
I am very sorry for my english.

Hi, I define the river: #define UV_PSOURCE #define TS_PSOURCE #define Q_PSOURCE and define SEDIMENT in the .h file. In the ocean.in file i set LtracerSrc == T T T ! temperature, salinity, inert in the sediment.h file, i set, MUD_Ltracer == T SAND_Ltracer == T However,the model result show only river ...

Thanks a lot !

hi,
i know, in the tidal forcing file, the units of tide_Cangle is degree.
i don't know where units the conversion tide_Cangle to UV_Tangle.
i think, UV_Tangle=tide_Cangle*deg2rad.
thaks a lot !

Hi, when i run the model after 3 days, it report an error: Process Information: Thread # 0 (pid= 0) is active. Thread # 1 (pid= 0) is active. Model Input Parameters: ROMS/TOMS version 3.4 Wednesday - March 2, 2011 - 3:30:11 PM ...

when i add tide, the modle blow up . I find, maybe because the velocity too large.
I check the tide forcing file, there is nothing wrong in it. Why the model blow up ?

Thank you very much ! Hi,I want to do pollutant model to study the environmental capacity. 1) i know roms can add a passive tracer (set the ' NPT = 1 ! Number of inactive passive tracers' and 'define T_PASSIVE' in the cpp file), I think the COD also can model by passice tracer ?. 2) If can, How to ...

i know roms can add a passive tracer (such as COD ). However, i want to do a model 'couple' the COD wtih NPZD (or EcoSIM, NEMURO ) model. How to do ?
Thanks !

I would probably look at how the biology is timestepped and copy that. Just copy and modify code from one of the simpler NPZD options and call it from main3d just after the biology gets called. Give your code a unique cppdefs name, just as biology has BIOLOGY. Sorry, I do not understand. How to do ...

how to model COD (chemical oxygen demand) ?
which tracer?
Thanks a lot !

Hi,I want to do pollutant model to study the environmental capacity.
I want to model the COD, DO, Nutrient,Chla.
However, i don't know how to start?
I have read viewtopic.php?f=1&t=1679&hilit=POLLUTANT . I don't konw how to do ?
Please help me. Thanks!

hello, the figure is my studied area. There are one tidal level station and three tidal current station. i have made an force tide file from the station data and OPTS data.(the tidal lvel data last one month and tidal current last two days) However, there also a lack of boundary file,when i use the ...

Hi,
I have the same question. Did you solve it?
Who can help me?
Thanks a lot.

Hi,
I want to use sediment model.And i don't want to couple with swan.In other words, i have not wave data.
I have two questions as following:
(1) the bedload transport use BEDLOAD_MPM?
(2) the bbl use the linear and quadratic drag-coefficient methods? which CPP?

Thank you!

Hi， I want to input the bounday data per hour, how to do? I am doing a tidal model, need to input the hourly tidal water level data.However, the unit of ‘bry_time' is 'days', how to do? Or, how can sovle the tidal bounday 'zeta' data input ? Thank you! Does only Change this :? double bry_time(bry_tim ...

Dear all, how to cerate tidal boundary file or modify ana_fsobc.h and ana_m2obc.h ? I have made a tidal forcing file from TPXO6.0, refer the https://www.myroms.org/wiki/index.php/Tidal_Forcing. However, i don't know how to cerate tidal boundary file such as surface elevation. I know, by modifying ...