The 'local scaling' hypothesis, first introduced by Nieuwstadt two decades ago, describes the turbulence structure of the stable boundary layer in a very succinct way and is an integral part of numerous local closure-based numerical weather prediction models. However, the validity of this hypothesis under very stable conditions is a subject of ongoing debate. Here, we attempt to address this controversial issue by performing extensive analyses of turbulence data from several field campaigns, wind-tunnel experiments and large-eddy simulations. A wide range of stabilities, diverse field conditions and a comprehensive set of turbulence statistics make this study distinct.
Bibliographical noteFunding Information:
Special thanks go to Yuji Ohya for sending us his state-of-the-art wind-tunnel data. We are grateful to all those researchers who painstakingly collected data during the Iowa, Davis and CASES-99 field campaigns. We greatly acknowledge the valuable comments and suggestions made by Rob Stoll during the course of this study. This work was partially funded by NSF (EAR-0094200 and EAR-0120914 as part of the National Center for Earth-surface Dynamics) and NASA (NAG5-12909, NAG5-13639, NAG5-10569 and NAG5-11801) grants. One of us (SB) was partially supported by the Doctoral Dissertation Fellowship from the University of Minnesota. All the computational resources were kindly provided by the Minnesota Supercomputing Institute.
- Large-eddy simulation
- Local scaling
- Monin-Obukhov similarity theory
- Stable boundary layer