Influence of an internal gravity wave on the shape of the spectrum of the vertical component of the wind speed in the atmospheric boundary layer

Igor N. Smalikho; Viktor A. Banakh; Andrey V. Falits; Artem M. Sherstobitov

doi:10.1117/12.2690373

17 October 2023 Influence of an internal gravity wave on the shape of the spectrum of the vertical component of the wind speed in the atmospheric boundary layer

Igor N. Smalikho, Viktor A. Banakh, Andrey V. Falits, Artem M. Sherstobitov

Author Affiliations +

Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 127802T (2023) https://doi.org/10.1117/12.2690373
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation

Abstract

Using a pulsed coherent Doppler lidar, the effect of an internal gravity wave (IGW) propagating in a thermally stable atmospheric boundary layer on the shape of the spectral density of the vertical component of the wind velocity vector is experimentally studied. It has been established that the presence of IGW causes a significant change in the shape of the velocity spectrum at frequencies below the frequencies of the turbulence inertial subrange. In this case, between the IGW frequency and the lower frequency boundary of the inertial subrange, the spectrum has a power-law dependence on frequency. By analyzing the data of 700 lidar estimates of the spectral density of the vertical wind speed, it was found that the exponent is on average -3.

Citation Download Citation

Igor N. Smalikho, Viktor A. Banakh, Andrey V. Falits, and Artem M. Sherstobitov "Influence of an internal gravity wave on the shape of the spectrum of the vertical component of the wind speed in the atmospheric boundary layer", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 127802T (17 October 2023); https://doi.org/10.1117/12.2690373

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