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Measurement of boundary layer structure parameter profiles by acoustic sounding and comparison with direct measurements
Author(s) -
Moulsley T. J.,
Asimakopoulos D. N.,
Cole R. S.,
Crease B. A.,
Caughey S. J.
Publication year - 1981
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.49710745113
Subject(s) - depth sounding , anisotropy , attenuation , echo sounding , boundary layer , transmitter , turbulence , geology , acoustics , computational physics , optics , physics , remote sensing , meteorology , mechanics , telecommunications , computer science , channel (broadcasting) , oceanography
Acoustic sounder derived profiles of the atmospheric velocity and temperature structure parameters, C v 2 and C T 2 , are presented. the former is obtained using a novel bistatic acoustic sounder comprising a fan beam transmitter and a vertically directed receiver. Simultaneous profiles of the temperature structure parameter are obtained using a conventional monostatic sounder. Time histories of these quantities at two heights in the boundary layer are given and are compared with in‐situ measurements. the results indicate significant anisotropy in the temperature field at scales greater than a few metres and emphasize the care required when comparing directly measured and acoustically estimated turbulence quantities. the significance of anisotropy in the assessment of excess attenuation is also discussed.