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Non-Local Vertical Transport in the Shear-Free Convective Surface Layer: New Theory and Improved Parameterization of Turbulent Fluxes

  • Sergej Zilitinkevich
  • A. A. Grachev
  • J. C. R. Hunt
Part of the NATO • Challenges of Modern Society book series (NATS, volume 22)

Abstract

During the last several decades the surface frictional processes in the shear-free convective boundary layer (CBL) are considered conceptually in the spirit of the Prandtl (1932) theory of free convection, implying the ideas of (i) universal chaotic turbulence and (ii) local correspondence between turbulent fluxes and mean gradients. Accordingly the fluxes of heat and water vapour in the atmospheric surface layer are parameterized disregarding gross features of the CBL. Conventional practical tools are either the Monin-Obukhov similarity theory or simple downgradient turbulence closure models.

Keywords

Roughness Length Convective Boundary Layer Turbulent Flux Atmospheric Surface Layer Internal Boundary Layer 
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References

  1. Businger, J.A., 1973: A note on free convection. Boundary-Layer Meteorol., 4, 323–326.CrossRefGoogle Scholar
  2. Grachev, A.A., C.W. Fairall, and S.S. Zilitinkevich, 1997: Surface-layer scaling for the convection-induced stress regime. To appear in Boundary-Layer Meteorol. Google Scholar
  3. Prandtl, L., 1932: Meteorologische Anvendungen der Strömungslehre. Beit. Phys. Fr. Atmos., 19, 188–202.Google Scholar
  4. Schmidt, H., and U. Schumann, 1989: Coherent structure of the convective boundary layer derived from large-eddy simulations. J. Fluid Mech., 200, 511–562.CrossRefGoogle Scholar
  5. Schumann, U., 1988: Minimum friction velocity and heat transfer in the rough surface layer of a convective boundary layer. Boundary-Layer Meteorol., 44, 311–326.CrossRefGoogle Scholar
  6. Siggia, E.D., 1994: High Rayleigh number convection. Ann Rev. Fluid Mech., 26, 137–168.CrossRefGoogle Scholar
  7. Sykes, R.I., and D.S. Henn, 1989: Large-eddy simulation of turbulent sheared convection. J. Atmos. Sci., 46, 1106–1118.CrossRefGoogle Scholar
  8. Sykes, R.I., D.S. Henn, and W.S. Lewellen, 1993: Surface-layer description under free-convection conditions. Quart. J. Roy. Meteorol. Soc., 119, 409–421.CrossRefGoogle Scholar
  9. Zilitinkevich, S., 1997: Heat/Mass Transfer in the Convective Surface Layer: Towards Improved Parameterization of Surface Fluxes in Climate Models. Alfred-Wegener-Institut für Polar-und Meeresforschung. Berichte aus dem Fachbereich Physik. Report 76, 34 pp.Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Sergej Zilitinkevich
    • 1
    • 2
  • A. A. Grachev
    • 2
  • J. C. R. Hunt
    • 3
  1. 1.Institute for HydrophysicsGKSS Research CentreGeesthachtGermany
  2. 2.A.M. Obukhov Institute of Atmospheric PhysicsMoscowRussia
  3. 3.DAMTPUniversity of CambridgeCambridgeUK

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