Interpretation of the data of simultaneous sodar measurements of vertical profiles of CT2 and CV2 in the atmospheric boundary layer

Lyudmila G. Shamanaeva

doi:10.1117/12.411960

29 December 2000 Interpretation of the data of simultaneous sodar measurements of vertical profiles of C_T² and C_V² in the atmospheric boundary layer

Lyudmila G. Shamanaeva

Author Affiliations +

Proceedings Volume 4341, Seventh International Symposium on Atmospheric and Ocean Optics; (2000) https://doi.org/10.1117/12.411960
Event: 7th International Symposium on Atmospheric and Ocean Optics, 2000, Tomsk, Russian Federation

Abstract

Based on the method suggested by the author, the data of acoustic sounding with the Zvuk-2 three-channel Doppler sodar with operating frequency 1700 Hz capable of measuring the backscattered signal power are interpreted. A closed iterative algorithm considers the excess turbulent attenuation of a sodar pulse when it propagates along the path from the transmitter to the sounded volume and back to the receiver. Synchronous vertical profiles of the thermal C_T²(z) and velocity C_V²(z) structure parameters are obtained for altitudes up to 515 m. Cases of synchronous altitude behavior of C_T² and C_V² were observed along with cases where the minimum in the C_V² profile corresponded to the maximum in the C_T² profile. Simultaneous measurements show that the main contribution to the refractive index structure parameter C_n²(z) and hence to the turbulent sound attenuation in the above-indicted altitude range comes from the dynamic turbulence. Altitude behavior of the sound refractive index structure parameter and the turbulent energy dissipation rate are discussed.

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Lyudmila G. Shamanaeva "Interpretation of the data of simultaneous sodar measurements of vertical profiles of C_T² and C_V² in the atmospheric boundary layer", Proc. SPIE 4341, Seventh International Symposium on Atmospheric and Ocean Optics, (29 December 2000); https://doi.org/10.1117/12.411960

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