The spectrum of vertical velocity near the surface

✍ Scribed by H. A. Panofsky; R. A. McCormick

• Publisher: John Wiley and Sons
• Year: 1960
• Tongue: English
• Weight: 494 KB
• Volume: 86
• Category: Article
• ISSN: 0035-9009
• DOI: 10.1002/qj.49708637006

✦ Synopsis

Abstract

Observations of a considerable number of vertical‐velocity spectra are combined to show that under near‐neutral and unstable conditions, the shape of the spectrum is essentially invariant up to heights of order 100 m, and the ‘scale’ of turbulence is proportional to height within this régime.

A semi‐empirical working hypothesis is suggested which relates the spectrum to wind speed, lapse rate, height and roughness.