16.3. Comparison of ROMS and CROCO versionsΒΆ

Models

CROCO

ROMS-UCLA

ROMS-Rutgers / COASWT

Origin

UCLA-IRD-INRIA-
IFREMER-SHOM-CNRS

UCLA

UCLA-Rutgers-USGS

Maintenance

IRD-INRIA-IFREMER-
SHOM-CNRS

UCLA

Rutgers-USGS

Realm

Europe-World

US West Coast

US East Coast

Introductory year

1999 (AGRIF)
2016 (CROCO)

2002

1998

CODE FEATURES

Models

CROCO

ROMS-UCLA

ROMS-Rutgers / COASWT

Parallelization

MPI or OpenMP
(Hybrid branch exists)
Hybrid MPI-OpenMP

MPI or OpenMP

Nesting

Online
at barotropic level
Off-line (On-line at
baroclinic level and
not yet operational)

Off-line

Data assimilation

3DVAR

3DVAR

4DVAR

Wave-current interact.

McWilliams et al. 2004

McWilliams et al. 2004

Mellor (2003) and Mc-
Williams et al. (2004)

Air-sea coupling

OASIS-MCT

Home made

MCT

Sediment Dynamics

Blaas et al. (2007),
MUSTANG

Blaas et al. (2007)

Blaas et al. (2007),
Warner et al. (2008)

Biogeochemistry

NPZD Gruber et al.
(2006), PISCES
NPZD Gruber et al.
(2006)
EcoSim, NEMURO,
NPZD Franks,
NPZD Powell, Fennel

Sea ice

none

none

Budgell (2005)

Vertical mixing

KPP, GLS

KPP, GLS

KPP, GLS

Wetting-Drying

Warner et al. (2013)

none

Warner et al. (2013)

TIME STEPPING

Models

CROCO

ROMS-UCLA

ROMS-Rutgers / COASWT

2D momentum

Generalized FB AB3-AM4

Generalized FB AB3-AM4

LF-AM3 with FB feedback

3D momentum

LF-AM3

LF-AM3

AB3

Tracers

LF-AM3 with stabi lizing
correction for iso-
pycnal hyperdiffusion
LF-AM3 with stabi lizing
correction for iso-
pycnal hyperdiffusion
LF-TR with explicit
geopotential diffusion
(no stabilizing cor-
rection: strong stabil ity
constraint)

Internal waves

LF-AM3 with FB feedback

LF-AM3 with FB feedback

Generalized FB (AB3-TR)

Coupling stage

Predictor

Corrector

STABILITY CONSTRAINTS (Max Courant number)

Models

CROCO

ROMS-UCLA

ROMS-Rutgers / COASWT

2D

1.78

1.78

1.85

3D advection

1.58

1.58

0.72

Coriolis

1.58

1.58

0.72

Internal waves

1.85

1.85

1.14