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A TKE-dissipation model for the atmospheric boundary layer

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Abstract

The dissipation, ε, of turbulent kinetic energy (TKE) is a key parameter in atmospheric boundary-layer (ABL) models. Besides being a sink for momentum, it is often used together with the TKE to define an internal turbulence time scale for closure relations. A prognostic formulation for the dissipation of TKE is formulated, based on isotropic tensor modeling methods. The formulation is coupled to a level 2.5 second-order closure model and evaluated against measurements taken in horizontally homogeneous conditions, as well as against a tailored length-scale formulation. A formulation suitable for convective as well as neutral and stable ABLs is suggested.

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Authors and Affiliations

  1. National Center for Atmospheric Research, P.O. Box 3000, 80307, Boulder, CO, USA

    Anders Andrén

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  1. Anders Andrén
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On leave from Department of Meteorology, Uppsala University, P.O. Box 516, S-751 20 Uppsala, Sweden.

The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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Andrén, A. A TKE-dissipation model for the atmospheric boundary layer. Boundary-Layer Meteorol 56, 207–221 (1991). https://doi.org/10.1007/BF00120420

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  • DOI: https://doi.org/10.1007/BF00120420

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