S-Coordinates Rutgers University Model (SCRUM), Development Discontinued


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Please report all bugs or feel free to contact me at:

Hernan G. Arango
Institute of Marine and Coastal Sciences
Rutgers University
71 Dubley Road
New Brunswick, NJ 08901-8521
off: (732) 932-6555 x266
fax: (732) 932-6520


There is a draft SCRUM manual written by Kate Hedstrom. It contains a color figure which you might want separately.


SCRUM solves the free surface, hydrostatic, primitive equations over variable topography using stretched terrain-following coordinates in the vertical and orthogonal curvilinear coordinates in the horizontal.

Earlier versions of SCRUM are described in:

Song, Y. and D. Haidvogel, 1994: A semi-implicit ocean circulation model using a generalized topography- following coordinate system, J. Comp. Physics, 115, 228-244.

The model equations are solved separately for total momentum and vertically integrated momentum and then coupled. The total momentum and tracer equations are time discretized using a third order Adams-Bashforth scheme; the vertical viscosity/diffusion terms are treated implicitly using a Crank-Nicolson scheme. The free-surface and vertically integrated momentum equations are time discretized using a trapezoidal Leapfrog scheme. Horizontal and vertical derivatives are evaluated using finite differences on a staggered horizontal C-grid and a staggered vertical grid.

New Features: (+ completed; * ongoing testing; - under development; ~ near future)