ROMS_TOOLS: A toolbox for ROMS pre- and post-processingPierrick Penven, IRD

http://www.brest.ird.fr/Roms_tools/index.html

Goal: to simplify the design and analysis of ROMS model configurations

In general, to run a ROMS simulation we must:

- build a grid

- find topography data

- find a way to do the interpolations

- put everything in a correct format

- generate a "forcing" file

- find wind data, heat flux , ...

- generate a "initial" file

- find Temperature data, Salinity data, currents data

- generate a "climatology" file

- compile the netcdf library

- compile roms

- run roms

- look at the results

etc...

... Very time consuming task

ROMS_TOOLS:

- integrated set of matlab tools to generate and visualize ROMS simulations- generate quickly a "standard" ROMS configuration- provides the necessary data sets- possibility of new developments (nesting, tides, etc..)

./Roms_tools/Roms_Agrif/

./Roms_tools/COADS05/

./Roms_tools/Diagnostic_tools/

./Roms_tools/Documentation/

./Roms_tools/mask/

./Roms_tools/Mercator_interp/

./Roms_tools/m_map/

./Roms_tools/Nesting_tools/

./Roms_tools/netcdf_g77/

./Roms_tools/netcdf_ifc/

./Roms_tools/netcdf_matlab/

./Roms_tools/Preprocessing_tools/

./Roms_tools/Quickscat_wind/

./Roms_tools/Run/

./Roms_tools/SST_pathfinder/

./Roms_tools/Tides/

./Roms_tools/Topo/

./Roms_tools/Visualization_tools/

./Roms_tools/WOA2001/

Contents :

Informations to give:

- Title='VENISE #1';

- grdname='roms_grd.nc';

- lonmin=9;

- lonmax=21;

- latmin=36;

- latmax=46;

- dl=1/5;

- hmin=50;

- rtarget=0.3;

- topofile='../Topo/etopo2.nc'

STEP 1: the grid file (make_grid.m)

ROMS_TOOLS choices:

- rectangular grid

- dx=dy (i.e. delta phi = cos(phi) . delta G )

- etopo2

- mask (h>0)

- selective smoothing of the topography

Informations to give:

- title=['Forcing (COADS)'];

- grdname='roms_grd.nc';

- frcname='roms_frc.nc';

STEP 2: the forcing file (make_forcing.m)

ROMS_TOOLS choices:

- Dasilva climatology

- extrapolation : OA or 'nearest'

- interpolation : 'cubic'

Informations to give:

- title='Climatology';

- makeclim=1;

- makeoa=1;

- makeini=1;

- grdname='roms_grd.nc';

- frcname='roms_frc.nc';

- clmname='roms_clm.nc';

- ininame='roms_ini.nc';

- oaname ='roms_oa.nc';

- theta_s=6.;

- theta_b=0.;

- hc=10.;

- N=32;

- obc=[1 1 0 1]; [S E N W]

STEP 3: the climatology and initial files (make_clim.m)

ROMS_TOOLS choices:

- WOA 2001hydrographic data

- extrapolations and interpolations along z levels

- intermediates (z-coordinates) oa files

- geostrophy

- mass conservation enforcement

- equator

Compile and run:

edit cppdefs.h and param.h

compile by jobcomp

edit roms.in

Visualization (roms_gui.m) :

Informations to give:

- tidename='../Tides/TPXO6.nc';

- gname='roms_grd.nc';

- fname='roms_frc.nc';

- Ntides=5;

- year=2000;

- month=1;

- day=15;

- hr=0.;

- minute=0.;

- second=0.;

%

% Choose order from the rank in the TPXO file :

% "M2 S2 N2 K2 K1 O1 P1 Q1 Mf Mm"

tidalrank=[1 2 3 4 5 6 7 8 9 10];

Add tides (make_tides.m)

ROMS_TOOLS choices:

- TPX06 global model

- tidal ellipse parameters in the ROMS forcing file

Nesting (nestgui.m)

To summarize:

ROMS_TOOLS might be useful as a first

step before making more complex

experiments and analysis