Spectral Gap in Surface-Layer Measurements

Abstract A series of measurements of wind, temperature and humidity from several heights, covering periods of the order of magnitude of one day, have been subjected to spectral analysis. Those spectral parts, which lie in the “spectral gap” region, have been analyzed in terms of the Monin-Obukhov similarity theory and pieced together with high-frequency spectra, treated in the same way. The analysis indicates a definite ordering of the results according to the Monin-Obukhov dimensionless height z/L.