Premium
Intensities and spectra of vertical wind fluctuations at heights between 100 and 500 ft in neutral and unstable conditions
Author(s) -
Thompson N.
Publication year - 1962
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49708837712
Subject(s) - turbulence , spectral line , atmospheric sciences , environmental science , wind speed , computation , scale (ratio) , stability (learning theory) , meteorology , signal (programming language) , physics , computational physics , mathematics , astronomy , computer science , algorithm , quantum mechanics , machine learning , programming language
Records of vertical gustiness have been obtained using a sensitive vane attached to the cable of a captive balloon. Electrical filtering of the output signal from the vane reduced the labour of subsequent computation. Intensities of turbulence were found to decrease with increasing wind speed. Length scales generally showed no regular trend with height below 400 ft, because of (a) the dependence of scale on stability, and (b) the heterogeneity of the present data as regards stability. Most spectra exhibited two major peaks.