Abstract: The “neutral” boundary layer is driven entirely by mean shear. The rough-surface daytime atmospheric boundary layer (ABL), however, is driven both by mesoscale winds and surface heating, and the scale and structure of ABL turbulence eddies depend on the relative contributions of buoyancy-driven vertical motions and shear-generated horizontal fluctuations. This balance is characterized by the global stability parameter -zi/L, the ratio of boundary layer depth zi and Obukhov length scale L
Acknowledgements: This work was a collaboration with Dr. Balaji Jayaraman, currently Research Consultant and Scientist, SciAI LLC, USA, and was supported by DOE/EERE. The study was recently published in JFM (doi:10.1017/jfm.2021.3).