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Correlations in the vertical component of the wind at heights of 600, 1,600 and 2,600 ft at cardington
Author(s) -
Angell J. K.
Publication year - 1964
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.49709038509
Subject(s) - morning , convection , atmospheric sciences , wind shear , boundary layer , geology , meteorology , climatology , physics , mechanics , wind speed , astronomy
With the primary purpose of differentiating between various theories of convection in the planetary boundary layer, spectral and cross‐spectral analyses have been performed upon wind‐inclination data obtained at heights of 600, 1,600 and 2,600 ft at Cardington. Based upon approximately 4,500 observations at 15‐sec intervals at each of the 3 levels, the correlation between inclination angles varies from a maximum of 0·48 for oscillations of 25‐min period to a minimum of — 0·01 for oscillations of 2·5‐min period. Based upon 17 or 18 hour‐long runs, these inter‐level correlations are greater in the afternoon than in the morning and tend to increase as the wind shear between levels decreases. In general, there is no firm evidence that the oscillations occur earlier at one level than another and it is considered that the data available tend to favour the plume model of convection over the bubble model of convection.