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Vertical turbulent fluxes of aerosol and heat in a desertified area during intermittent emission of dust aerosol
- Authors: Gorchakov G.I.1, Karpov A.V.1, Gushchin R.A.1, Datsenko O.I.1, Kurbatov G.A.1
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Affiliations:
- Obukhov Institute of Atmospheric Physics RAS
- Issue: Vol 61, No 1 (2025)
- Pages: 111-120
- Section: Articles
- URL: https://journals.rcsi.science/0002-3515/article/view/293934
- DOI: https://doi.org/10.31857/S0002351525010086
- EDN: https://elibrary.ru/HEXNDK
- ID: 293934
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Abstract
According to measurements in September 2021 in a desertefied area in the Astrakhan region components of wind speed, air temperature and concentration of aerosol particles in the surface layer of the atmosphere, vertical heat turbulent fluxes and dust aerosol were determined. A statistical analysis of variations in meteorological parameters and aerosol particle concentrations was performed. The temporal variability of the horizontal and vertical components of wind speed, air temperature and aerosol particle concentration was analyzed using spectral analysis. A comparison has been made of the empirical distribution functions of heat flux density and the temporal variability of the rate of heat removal from the underlying surface according to synchronous measurements using acoustic weather stations Meteo-2 and Metek. Significant differences in the spatiotemporal variability of the vertical turbulent transfer of heat and dust aerosol in a desertified area were revealed. The 30-minute average values of the friction velocity, the Monin-Obukhov scale, turbulent heat fluxes (90–160 W/m2) and dust aerosol (7.2–27.5 cm–2 s–1), as well as the heat removal rate (14–21 cm/s) and dust aerosol (10–16 cm/s) from the underlying surface. It is shown that the temporal variability of the dust aerosol flux density is caused by a superposition of convective “low-frequency” movements with a scale of approximately 3–15 minutes and “high-frequency variations with a duration of less than approximately 10 s.”
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About the authors
G. I. Gorchakov
Obukhov Institute of Atmospheric Physics RAS
Author for correspondence.
Email: gengor@ifaran.ru
Russian Federation, Pyzhevsky per., 3, bld. 1, Moscow, 119017
A. V. Karpov
Obukhov Institute of Atmospheric Physics RAS
Email: gengor@ifaran.ru
Russian Federation, Pyzhevsky per., 3, bld. 1, Moscow, 119017
R. A. Gushchin
Obukhov Institute of Atmospheric Physics RAS
Email: gengor@ifaran.ru
Russian Federation, Pyzhevsky per., 3, bld. 1, Moscow, 119017
O. I. Datsenko
Obukhov Institute of Atmospheric Physics RAS
Email: gengor@ifaran.ru
Russian Federation, Pyzhevsky per., 3, bld. 1, Moscow, 119017
G. A. Kurbatov
Obukhov Institute of Atmospheric Physics RAS
Email: gengor@ifaran.ru
Russian Federation, Pyzhevsky per., 3, bld. 1, Moscow, 119017
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