Formulation of an ocean model for global climate simulations

S. M. Griffies, A. Gnanadesikan, K. W. Dixon, J. P. Dunne, R. Gerdes, M. J. Harrison, A. Rosati, Joellen Russell, B. L. Samuels, M. J. Spelman, M. Winton, R. Zhang

Research output: Contribution to journalArticle

245 Citations (Scopus)

Abstract

This paper summarizes the formulation of the ocean component to the Geophysical Fluid Dynamics Laboratory's (GFDL) climate model used for the 4th IPCC Assessment (AR4) of global climate change. In particular, it reviews the numerical schemes and physical parameterizations that make up an ocean climate model and how these schemes are pieced together for use in a state-of-the-art climate model. Features of the model described here include the following: (1) tripolar grid to resolve the Arctic Ocean without polar filtering, (2) partial bottom step representation of topography to better represent topographically influenced advective and wave processes, (3) more accurate equation of state, (4) three-dimensional flux limited tracer advection to reduce overshoots and undershoots, (5) incorporation of regional climatological variability in shortwave penetration, (6) neutral physics parameterization for representation of the pathways of tracer transport, (7) staggered time stepping for tracer conservation and numerical efficiency, (8) anisotropic horizontal viscosities for representation of equatorial currents, (9) parameterization of exchange with marginal seas, (10) incorporation of a free surface that accomodates a dynamic ice model and wave propagation, (11) transport of water across the ocean free surface to eliminate unphysical "virtual tracer flux" methods, (12) parameterization of tidal mixing on continental shelves. We also present preliminary analyses of two particularly important sensitivities isolated during the development process, namely the details of how parameterized subgridscale eddies transport momentum and tracers.

Original languageEnglish (US)
Pages (from-to)45-79
Number of pages35
JournalOcean Science
Volume1
Issue number1
StatePublished - 2005
Externally publishedYes

Fingerprint

global climate
tracer
parameterization
ocean
climate modeling
simulation
marginal sea
fluid dynamics
equation of state
wave propagation
continental shelf
momentum
eddy
advection
physics
penetration
viscosity
topography
ice
climate change

ASJC Scopus subject areas

  • Oceanography
  • Palaeontology

Cite this

Griffies, S. M., Gnanadesikan, A., Dixon, K. W., Dunne, J. P., Gerdes, R., Harrison, M. J., ... Zhang, R. (2005). Formulation of an ocean model for global climate simulations. Ocean Science, 1(1), 45-79.

Formulation of an ocean model for global climate simulations. / Griffies, S. M.; Gnanadesikan, A.; Dixon, K. W.; Dunne, J. P.; Gerdes, R.; Harrison, M. J.; Rosati, A.; Russell, Joellen; Samuels, B. L.; Spelman, M. J.; Winton, M.; Zhang, R.

In: Ocean Science, Vol. 1, No. 1, 2005, p. 45-79.

Research output: Contribution to journalArticle

Griffies, SM, Gnanadesikan, A, Dixon, KW, Dunne, JP, Gerdes, R, Harrison, MJ, Rosati, A, Russell, J, Samuels, BL, Spelman, MJ, Winton, M & Zhang, R 2005, 'Formulation of an ocean model for global climate simulations', Ocean Science, vol. 1, no. 1, pp. 45-79.
Griffies SM, Gnanadesikan A, Dixon KW, Dunne JP, Gerdes R, Harrison MJ et al. Formulation of an ocean model for global climate simulations. Ocean Science. 2005;1(1):45-79.
Griffies, S. M. ; Gnanadesikan, A. ; Dixon, K. W. ; Dunne, J. P. ; Gerdes, R. ; Harrison, M. J. ; Rosati, A. ; Russell, Joellen ; Samuels, B. L. ; Spelman, M. J. ; Winton, M. ; Zhang, R. / Formulation of an ocean model for global climate simulations. In: Ocean Science. 2005 ; Vol. 1, No. 1. pp. 45-79.
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