An intercomparison of large-eddy simulations of the stable boundary layer

Robert J. Beare, Malcolm K. Macvean, Albert A.M. Holtslag, Joan Cuxart, Igor Esau, Jean Christophe Golaz, Maria A. Jimenez, Marat Khairoutdinov, Branko Kosovic, David Lewellen, Thomas S. Lund, Julie K. Lundquist, Anne McCabe, Arnold F. Moene, Yign Noh, Siegfried Raasch, Peter Sullivan

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Abstract

Results are presented from the first intercomparison of large-eddy simulation (LES) models for the stable boundary layer (SBL), as part of the Global Energy and Water Cycle Experiment Atmospheric Boundary Layer Study initiative. A moderately stable case is used, based on Arctic observations. All models produce successful simulations, in as much as they generate resolved turbulence and reflect many of the results from local scaling theory and observations. Simulations performed at 1-m and 2-m resolution show only small changes in the mean profiles compared to coarser resolutions. Also, sensitivity to subgrid models for individual models highlights their importance in SBL simulation at moderate resolution (6.25 m). Stability functions are derived from the LES using typical mixing lengths used in numerical weather prediction (NWP) and climate models. The functions have smaller values than those used in NWP. There is also support for the use of K-profile similarity in parametrizations. Thus, the results provide improved understanding and motivate future developments of the parametrization of the SBL.

Original languageEnglish
Pages (from-to)247-272
Number of pages26
JournalBoundary-Layer Meteorology
Volume118
Issue number2
DOIs
Publication statusPublished - 2006 Feb

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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    Beare, R. J., Macvean, M. K., Holtslag, A. A. M., Cuxart, J., Esau, I., Golaz, J. C., Jimenez, M. A., Khairoutdinov, M., Kosovic, B., Lewellen, D., Lund, T. S., Lundquist, J. K., McCabe, A., Moene, A. F., Noh, Y., Raasch, S., & Sullivan, P. (2006). An intercomparison of large-eddy simulations of the stable boundary layer. Boundary-Layer Meteorology, 118(2), 247-272. https://doi.org/10.1007/s10546-004-2820-6