The Distribution of the Thickness Diffusivity Inferred from a High-Resolution Ocean Model

  • Yukio Tanaka
  • Hiroyasu Hasumi
  • Masahiro Endoh


Using a high-resolution ocean model (1/8 × 1/12, 85 levels) with realistic geometry and forcing, the diffusion coefficient of the isopycnal thickness is evaluated in the Southern Ocean. It is found that the coefficient is large in the Argentine Basin, the Agulhas Retroflection region, and the east of the Kerguelen Pleatue at 2000 m depth. The large coefficient regions coincide with high growth rate regions of the baroclinic instability.


Ocean Model Antarctic Circumpolar Current Mesoscale Eddy Baroclinic Instability Ocean Circulation Model 
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  1. Antonov, J. I., S. Levitus, T. P. Boyer, M. E. Conkright, T. D. O’Brien, and C. Stephens, 1998: World Ocean Atlas 1998 Vol. 1: Temperature of the Atlantic Ocean. NOAA Atlas NESDIS 27, US Government Printing Office, Washington, DCGoogle Scholar
  2. Boyer, T. P., S. Levitus, J. I. Antonov, M. E. Conkright, T. D. O’Brien, and C. Stephens, 1998: World Ocean Atlas 1998 Vol. 4: Salinity of the Atlantic Ocean. NOAA Atlas NESDIS 30, US Government Printing Office, Washington, DCGoogle Scholar
  3. Bryan, K., J. Dukowicz, and R. Smith, 1999: On the mixing coefficient in the parameterization of bolus velocity. J. Phys. Oceanogr., 29, 2442-2456.CrossRefGoogle Scholar
  4. Danabasoglu, G., J. McWilliams, and P. Gent, 1994: The role of mesoscale tracer transports in the global ocean circulation. Science, 264, 1123-1126.CrossRefGoogle Scholar
  5. Ducet, N., P. Le Traon, and G. Reverdin, 2000: Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2. J. Geophys. Res., 105(C8), 19477-19498.CrossRefGoogle Scholar
  6. Gent, P. and J. McWilliams, 1990: Isopycnal mixing in ocean circulation models. J. Phys. Oceanogr., 20,150-155.CrossRefGoogle Scholar
  7. Gent, P., J. Willebrand, T. McDougall, and J. McWilliams, 1995: Parameterizing eddy-induced tracer transports in ocean circulation models. J. Phys. Oceanogr., 25, 463-474.CrossRefGoogle Scholar
  8. Green, J., 1970: Transfer properties of the large-scale eddies and the general circulation of the atmosphere. Q. J. R. Meteorol. Soc., 96, 157-185.CrossRefGoogle Scholar
  9. Griffies, S., 1998: The Gent-McWilliams skew flux. J. Phys. Oceanogr., 28, 831-841.CrossRefGoogle Scholar
  10. Griffies, S. and W. Hallberg, 2000: Biharmonic friction with a Smagorinsky-like viscosity for use in large-scale eddy-permitting ocean model. Mon. Weather Rev., 128, 2935-2946.CrossRefGoogle Scholar
  11. Hasumi, H., 2000: CCSR Ocean Compoment Model (COCO) version 2.1. CCSR Rep. 13, Univ. of Tokyo, Tokyo, 68 pages.Google Scholar
  12. Hasumi, H. and N. Suginohara, 1999: Sensitivity of a global ocean general circulation model to tracer advection schemes. J. Phys. Oceanogr., 29, 2730-2740.CrossRefGoogle Scholar
  13. Hirst, A. and T. McDougall, 1996: Deep-water properties and surface buoyancy flux as simulated by a z-coordinate model including eddy-induced advection. J. Phys. Oceanogr., 26, 1320-1343.CrossRefGoogle Scholar
  14. Ishizaki, H. and T. Motoi, 1999: Reevaluation of the Takano-Onishi scheme for momentum advection on bottom relief in ocean models. J. Atmos. Oceanic. Technol., 16, 1994-2010.CrossRefGoogle Scholar
  15. Larichev, V. and I. Held, 1995: Eddy amplitudes and fluxes in a homogeneous model of fully developed baroclinic instability. J. Phys. Oceanogr., 25, 2285-2297.CrossRefGoogle Scholar
  16. Lee, M.-M., D. Marshall, and R. Williams, 1997: On the eddy transfer of tracers:Advective or diffusive? J. Mar. Res., 55, 483-505.CrossRefGoogle Scholar
  17. Nakano, H. and H. Hasumi, 2005: A series of zonal jets embedded in the broad zonal flows in the Pacific obtained in eddy-permittimg ocean general circulation models. J. Phys. Oceanogr., 35, 474-488.CrossRefGoogle Scholar
  18. Nerem, R., E. Schrama, C. Koblinsky, and B. Beckly, 1994: A preliminary evaluation of ocean topography from the TOPEX/POSEIDON mission. J. Geophys. Res., 99(C12), 24565-24583.CrossRefGoogle Scholar
  19. Rix, N. and J. Willebrand, 1996: Parameterization of mesoscale eddies as inferred from a high-resolution circulation model. J. Phys. Oceanogr., 26, 2281-2285.CrossRefGoogle Scholar
  20. R öske, F., 2001: An atlas of surface fluxes based on the ECMWF re-analysis - A climatological dataset to force global ocean general circulation models. Max-Planck-Institut f ür Meteorologie, Hamburg, Report No. 323.Google Scholar
  21. Solovev, M., P. Stone, and P. Malanotte-Rizzoli, 2002: Assessment of mesoscale eddy parameterizations for a sigle-basin coarse-resolution ocean model. J. Geophys. Res., 107(C9), 3126, doi:10.1029/2001JC001032.CrossRefGoogle Scholar
  22. Stammer, D., 1998: On eddy characteristics, eddy transports, and mean flow properties. J. Phys. Oceanogr., 28, 727-739.CrossRefGoogle Scholar
  23. Stone, P., 1972: A simplified radiative-dynamical model for the static stability of rotating atomspheres. J. Atmos. Sci., 29, 405-418.CrossRefGoogle Scholar
  24. Treguier, A., 1999: Evaluating eddy mixing coefficients from eddy-resolving ocean models: A case study. J. Mar. Res., 57, 89-108.CrossRefGoogle Scholar
  25. Treguier, A., I. Held, and V. Larichev, 1997: On the parameterization of the quasigeostrophic eddies in primitive equation ocean models. J. Phys. Oceanogr., 27, 567-580.CrossRefGoogle Scholar
  26. Visbeck, M., J. Marshall, T. Haine, and M. Spall, 1997: Specifications of eddy trasfer coefficients in coarse-resolution ocean circulation models. J. Phys. Oceanogr., 27, 181-402.CrossRefGoogle Scholar
  27. Wunsch, C. and D. Stammer, 1995: The global frequency-wavenumber spectrum of oceanic variability estimated from TOPEX/POSEIDON altimetric measurements. J. Geophys. Res., 100 (C12), 24895-24910.CrossRefGoogle Scholar

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© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Yukio Tanaka
  • Hiroyasu Hasumi
  • Masahiro Endoh

There are no affiliations available

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