Abstract
Distributions of the velocity-field helicity in the atmospheric boundary layer have been obtained from acoustic sounding data. The helicity of large-scale motions (0.3–0.6 m/s2) exceeds (by an order of magnitude) its independently measured turbulent values, which are close to helicity averaged over the layer (0.02–0.12 m/s2). In the absence of strong convection, there is good correlation between helicity and wind velocity squared at upper sounding levels of 400 to 600 m.
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Original Russian Text © N.V. Vazaeva, O.G. Chkhetiani, R.D. Kouznetsov, M.A. Kallistratova, V.F. Kramar, V.S. Lyulyukin, D.D. Kuznetsov, 2017, published in Izvestiya Rossiiskoi Akademii Nauk, Fizika Atmosfery i Okeana, 2017, Vol. 53, No. 2, pp. 200–214.
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Vazaeva, N.V., Chkhetiani, O.G., Kouznetsov, R.D. et al. Estimating helicity in the atmospheric boundary layer from acoustic sounding data. Izv. Atmos. Ocean. Phys. 53, 174–186 (2017). https://doi.org/10.1134/S0001433817020104
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DOI: https://doi.org/10.1134/S0001433817020104