Ocean Modeling Discussion

ROMS/TOMS

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PostPosted: Tue May 16, 2017 3:45 am 
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Joined: Wed Apr 12, 2017 6:20 pm
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Location: Kunsan National Univ.
Hi dear.

I use fennel model in ROMS.
my question is nutrient concentration in river.
I don't entered concentrations of bio variable in river file.
so when running model, what's the value? zero? or default?

if default,
how to calculate this tile?

thanks for reading


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PostPosted: Tue May 16, 2017 5:01 am 
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Joined: Wed Jul 02, 2003 5:29 pm
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Location: IMS/UAF, USA
Some fields are assumed to be zero in the rivers, like zooplankton concentration. Some nutrients are in the rivers and people do study that. One such study is here.


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PostPosted: Tue May 16, 2017 11:01 am 
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Joined: Mon Apr 28, 2003 5:44 pm
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Location: Rutgers University
There are logical flags in bio_Fennel.in that activate/deactivate tracers in the river file.

Code:
! Logical switches (TRUE/FALSE) to activate biological tracers point
! Sources/Sinks (like river runoff) and to specify which tracer variables
! to consider: [NBT,Ngrids] values are expected. See glossary below for
! details.

  LtracerSrc == 12*F


Any flags that are False will effectively cause zero concentration for that tracer. ROMS only reads from the river netcdf file the variables for which LtracerSrc is True. Check your logfile (stdout) to see which variables were read.

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PostPosted: Wed May 17, 2017 9:56 pm 
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wilkin wrote:
Any flags that are False will effectively cause zero concentration for that tracer.
I don't think this is true. I think having the flag set to true and the concentration to zero is the correct thing to do. Having volume inflow without providing tracer concentrations is asking for trouble.
Quote:
ROMS only reads from the river netcdf file the variables for which LtracerSrc is True. Check your logfile (stdout) to see which variables were read.
This is true.


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