Model:ROMS

ROMS

Model:	ROMS
Contact person:	Hernan G. Arango (Model developer)
Institute:	IMCS, Rutgers University
City:	New Brunswick, New Jersey
Country:	USA
Email:	arango@marine.rutgers.edu
2nd person involved:	Alexander Shchepetkin (Model developer)
3rd person involved:	John C. Warner (Model developer)
Others persons involved:	Adjoint Developers: Arango, Cournuelle, Di Lorenzo, Miller, Moore, Powell.

Model type:	Modular ocean model.
Description:	ROMS is a Free-surface, terrain-following, orthogonal curvilinear, primitive equations ocean model. Its dynamical kernel is comprised of four separate models including the nonlinear, tangent linear, representer tangent linear, and adjoint models. It has multiple model coupling (ESMF, MCT) and multiple grid nesting (composed, mosaics, refinement) capabilities. The code uses a coarse-grained parallelization with both shared-memory (OpenMP) and distributed-memory (MPI) paradigms coexisting together and activated via C-preprocessing.

Supported platforms:	UNIX, Linux, CygWin
Programming language:	Fortran90
Model development started at:	1998 and is still going on
To what degree will the model become available:	Source code is freely-distributed (SVN repository and Trac). Users need to register for access.
Current license type:	MIT/X License, see License_ROMS.txt.
Memory requirements:	Depends on application but it is relatively small in distributed-memory since only the tile partition is allocated for global and local arrays. All the state model variables are dynamically allocated and passed as arguments to the computational routines via de-referenced pointer structures.
Typical run time:	Depends on application and resolution. Usually it takes several hours to run a realistic application for a simulation month.

Input parameters:	There are hundreds of input parameters for the physical, ecosystem, and sediment models. In addition, there are input scripts for floats, stations, model coupling, and data assimilation.
Input format:	ASCII (input scripts), NetCDF (input fields).
Output parameters:	There are hundreds of output parameters and fields that are written to several NetCDF files.
Output format:	NetCDF, CF-convections.
Post-processing software (if needed):	Yes, ROMS I/O is via NetCDF and follows CF-standard conventions. Therefore, any visualization software for NetCDF files can be used for pre- and post-processing.
Visualization software (if needed):	Yes, a plotting package is provided. It uses the NCAR's graphics Library. Any visualization package for NetCDF files can be used, like IDL, Matlab, and others.

Processes represented by model:	ROMS resolved fast (gravity waves) and slow (Rossby waves) dynamics. Hydrostatic approximation but there is a nonhydrostatic version of ROMS.
Key physical parameters & equations:	Navier-Stokes primitive equations. Bio-optical, biogeochemical, and ecosystem models equations. Cohesive and non cohesive sediment equations. Several vertical turbulece equations (KPP, GLS, MY-2.5). Air-Sea interaction coupling equations (COARE). Bottom boundary layer model equations.
Length scale & resolution constraints:	Estuary, regional, and basin scales. There are couple of global applications.
Time scale & resolution constraints:	Hours, days, seasons. It also can be used for climate research (decades).
Numerical limitations and issues :	ROMS has a predictior-corrector algorithm that is efficient and accuarate. This class of model (terrain-following) exhibits stronger sensitivity to topography which results in pressure gradient errors. ROMS has several pressure gradient algorithms that minimize this problem.

Available calibration data sets:	There are several idealized and realistic test cases. Some of the idealized test cases have quasi-analytical solutions.
Available test data sets:	We have a website for test problems: http://marine.rutgers.edu/po/index.php?model=test-problems
Ideal data for testing:	We have test cases for both laboratory and field observations. In the past, we have used data from rotating tanks.

Currently or plans for collaborating with:	Yes, we work with several modeling groups around the world.

Key papers of the model:	There are a lot of papers describing ROMS algorithms and applications. They can be found at: http://www.myroms.org/index.php?page=papers
Is there a manual available:	yes, we have web-based documentation on WikiROMS.
Model website if any:	https://www.myroms.org

Comments:	The documentation about ROMS can be found in WikiROMS: https://www.myroms.org/wiki There is a very active ROMS user's forum: https://www.myroms.org/forum

ROMS is made available through the ROMS website: https://www.myroms.org

ROMS is made available through the ROMS website: https://www.myroms.org