1982/10/01 by Jørgen Højstrup · 194 citations
Earth and Planetary Sciences · Engineering · Mathematics · #Atomic physics #Boundary layer #Computational physics #Computer science #Geometry #Geophysics and Sensor Technology #Layer (electronics) #Materials science #Mathematics #Meteorology #Mixed layer #Nanotechnology #Physics #Quantum mechanics #Seismic Imaging and Inversion Techniques #Seismic Waves and Analysis #Spectral line #Stability (learning theory) #Surface (topology) #Surface layer #Thermodynamics
paper · pdf · doi:10.1175/1520-0469(1982)039<2239:vsitup>2.0.co;2
published in Journal of the Atmospheric Sciences 39(10), 2239-2248 (American Meteorological Society)
openalex publication_date 1982/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Models for velocity spectra of all three components in the lower half of the unstable PBL are presented. The model spectra are written as a sum of two parts, nS(n) = A(fi, z/zi)w*2 + B(f, z/zi)u*02, a mixed layer part with a stability dependence, and a surface layer part without stability dependence and with negligible influence of z/zi in B in the surface layer; A is independent of z/zi for the horizontal components. The model agrees very well with data for variances, peak frequencies and spectra from the Kansas and Minnesota experiments. Requirements for models of spectra in the upper half of the PBL are outlined qualitatively only.