Royal Dutch Meteorological Institute; Ministery Of Infrastructure And The Environment

Publications, presentations and other activities
The share of the mean turbulent kinetic energy in the near-neutral surface layer for high- and low-wind conditions
2019
by M. Schiavon (University of Bologna, Italy), F. Tampieri (), F.C. Bosveld (KNMI), M. Mazzola (), S. Trini Castelli ()A.P. Viola ()C. Yague ()
<p>We examine the dependence of the share of mean turbulent kinetic energy (TKE) among the three velocity components on wind speed in the almost-neutral surface layer. To contrast the general behaviour and the local effects, four datasets are considered, corresponding to different surface and<br /> environmental conditions. It results that, for high-wind (i.e., wind speed 10 m s-1), the shares are well de ned and about the same for all sites. As wind weakens (i.e.,  1 m s-1 or less), large case-to-case variability occurs for the horizontal components giving, on median, an almost isotropic state. Through spectral analysis, we relate this behaviour to low-frequency, submeso motions and the lack of conditions required by Reynolds averaging. The implications on closures and modelling are also discussed.</p>
Bibliographic data
Schiavon, M., F. Tampieri, F.C. Bosveld, M. Mazzola, S. Trini Castelli, A.P. Viola and C. Yague, The share of the mean turbulent kinetic energy in the near-neutral surface layer for high- and low-wind conditions
Bound.-Layer Meteorol., 2019, doi:10.1007/s10546-019-00435-6.
Abstract (html)