The Ratio of the Second and Third Turbulent Moments in the Urban Boundary Layer of the Atmosphere on the Example of Data from the Moscow State University Eddy Covariance Tower

I. D. Drozd; Дрозд И. Д.; A. Yu. Artamonov; Артамонов А. Ю.; K. V. Barskov; Барсков К. В.; A. V. Gavrikov; Гавриков А. В.; A. D. Pashkin; Пашкин А. Д.; I. A. Repina; Репина И. А.; V. M. Stepanenko; Степаненко В. М.

doi:10.31857/S0002351523040156

The Ratio of the Second and Third Turbulent Moments in the Urban Boundary Layer of the Atmosphere on the Example of Data from the Moscow State University Eddy Covariance Tower

Authors: Drozd I.D.¹^,2^,3, Artamonov A.Y.², Barskov K.V.², Gavrikov A.V.²^,4, Pashkin A.D.², Repina I.A.²^,3^,5, Stepanenko V.M.¹^,2^,3^,5
Affiliations:
1. Lomonosov Moscow State University, Faculty of Geography
2. Obukhov Institute of Atmospheric Physics, RAS
3. Lomonosov Moscow State University, Research Computing Center
4. Shirshov Institute of Oceanology, RAS
5. Moscow Center for Fundamental and Applied Mathematics
Issue: Vol 59, No 4 (2023)
Pages: 509-522
Section: Articles
URL: https://journals.eco-vector.com/0002-3515/article/view/658300
DOI: https://doi.org/10.31857/S0002351523040156
EDN: https://elibrary.ru/ZDJNCZ
ID: 658300

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Abstract

This work is devoted to testing the hypothesis about the presence of a diagnostic connection between the second and third moments of the hydrodynamic quantities $c_{1}$ and $c_{2}$ in the atmospheric boundary layer above a geometrically complex surface: $\overset{―}{w^{'} c_{1}^{^{'}} c_{2}^{^{'}}} = C S_{c_{1}} σ_{c_{1}} \overset{―}{w^{'} c_{2}^{^{'}}} .$ To test this ratio, a seven-month series of high-frequency measurements on an eddy covariance tower installed at the Meteorological Observatory of Lomonosov Moscow State University was used. Based on the statistical distribution of the third moments, the optimal methods for analyzing the reliability of the dependence under study were determined. For the first time on a large series of data, a statistically valid assessment of the validity of the tested hypothesis was obtained in the conditions of the urban underlying surface. The influence of stratification conditions and the nature of the underlying surface in the area of flux formation on the fulfillment of ratio second and third moments is studied. It is established that for the third moments $\overset{―}{w^{'} w^{'} T^{'}},$ $\overset{―}{w^{'} T^{'} T^{'}},$ $\overset{―}{w^{'} u^{'} u^{'}},$ and $\overset{―}{w^{'} v^{'} v^{'}}$ relation second and third moments is valid in 80% of cases.

Keywords

atmospheric boundary layer, urban surface, eddy covariance method, turbulent fluxes, third moments

References

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