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.
Bibliographical noteFunding Information:
1Met Office, U.K.; 2Wageningen University, The Netherlands; 3Universitat de les Illes Balears, Spain; 4Nansen Environmental and Remote Sensing Center, Norway; 5National Research Council, Naval Research Laboratory, Monterey, CA, U.S.A.; 6Colorado State University, U.S.A.; 7Lawrence Livermore National Laboratory, U.S.A.; 8West Virginia University, U.S.A.; 9Colorado Research Associates, U.S.A.; 10Yonsei University, South Korea; 11University of Hannover, Germany; 12National Center for Atmospheric Research, U.S.A.
All Science Journal Classification (ASJC) codes
- Atmospheric Science