Abstract
The various similarity theories proposed for the atmospheric boundary layer (ABL) are critically examined in the light of some recent atmospheric observations as well as the results of numerical modeling experiments. For the surface layer, the theory proposed by Monin and Obukhov (1954) is still the best, although by no means perfect. For the whole ABL, the older Kazanski-Monin (1961) similarity theory is found to be less satisfactory, and must be replaced by the generalized version of Deardorff's (1972a) hypothesis, which considers the effects of varying boundary-layer height, latitude, stability, and baroclinicity. The latter presents no conceptual or mathematical difficulties when applied to low latitudes. The free convection similarity scaling is valid only for certain turbulent quantities, under well-developed convection. The “shear convection” hypothesis of Zilitinkevich (1973) for the surface layer, as well as its extension for the whole ABL, are found wanting on both theoretical and physical grounds, and lead to unrealistic predictions about the turbulence structure.
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Contribution No. 350, Department of Atmospheric Sciences, University of Washington.
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Arya, S.P.S., Sundararajan, A. An assessment of proposed similarity theories for the atmospheric boundary layer. Boundary-Layer Meteorol 10, 149–166 (1976). https://doi.org/10.1007/BF00229282
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DOI: https://doi.org/10.1007/BF00229282