Abstract
The results of the development and comparative analysis of methods for determining wind shear in the atmosphere (regression and difference ones) based on research aircraft data are presented. It is shown that shear calculation by the regression method gives the error of 0.002–0.006 (m/s)/km (depending on the length of the measurement sections) for horizontal shears and 0.04–0.12 (m/s)/100 m for vertical shears; the respective error of the difference method is 0.007 (m/s)/km and 0.07 (m/s)/100 m. Based on the Yak-42D “Roshydromet” research aircraft data, the values of shears of two horizontal components of wind speed in three directions (two horizontal and vertical) were calculated. According to the data of two research aircraft flights, the maximum values of the horizontal shear of wind speed components were reached above the boundary layer and were equal to 0.2 (m/s)/km, and the vertical shear was 1.2 (m/s)/100 m. The energy profiles of horizontal and vertical turbulent pulsations are constructed, it is shown that intense turbulence smooths wind shears in the convective atmospheric boundary layer.
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REFERENCES
N. V. Bazanin, Yu. A. Borisov, V. V. Volkov, V. K. Dmitriev, D. N. Zhivoglotov, A. A. Makosko, A. M. Strunin, and M. A. Strunin, “Onboard Instrumentation of the Yak-42D “Roshydromet” New-generation Research Aircraft for Measuring and Registering Flight Parameters and Atmospheric Thermodynamic Parameters,” Meteorol. Gidrol., No. 11 (2014) [Russ. Meteorol. Hydrol., No. 11, 39 (2014)].
S. A. Bardasov, Econometrics. Tutorial, 2nd ed. (Tyumen Univ., Tyumen, 2010) [in Russian].
E. S. Ventsel’, Probability Theory (Nauka, Moscow, 1969) [in Russian].
N. K. Vinnichenko, N. Z. Pinus, S. M. Shmeter, and G. N. Shur, Turbulence in the Free Atmosphere (Gidrometeoizdat, Leningrad, 1976) [in Russian].
V. V. Volkov, G. E. Kolokutin, M. A. Strunin, and N. V. Bazanin, “The Onboard Data-acquisition System of Research Aircraft for Studying Atmospheric Processes,” Pribory i Tekhnika Ekperimenta, No. 3 (2019) [Instrum. Exp. Tech., No. 3, 62 (2019)].
M. Ya. Vygodskii, Handbook of Higher Mathematics (Moscow, 2006) [in Russian].
D. N. Zhivoglotov, Methods for Measuring and Calculating Air Temperature, Wind Speed, and Wind Direction in the Atmosphere According to the Data of a New-generation Research Aircraft, Abstract of Candidate’s Thesis in Physics and Mathematics (Dolgoprudny, 2018) [in Russian].
D. N. Zhivoglotov and M. A. Strunin, “Measurements of Flight Navigation Parameters and Thermodynamic Characteristics of the Atmosphere Using the Yak-42D “Roshydromet” Research Aicraft New-Generation Equipment,” in Proceedings of the 2nd All-Russian Scientific Conference “Ecology and Space” Named after Academician K. Ya. Kondrat’ev, St. Petersburg, February 10–11, 2015.
J. L. Lumley and H. A. Panofsky, The Structure of Atmospheric Turbulence (Mir, Moscow, 1966) [Transl. from English].
Manual on Low-level Wind Shear, Doc. 9817, AN/449 (ICAO, Geneva, 1005) [Transl. from English].
M. A. Strunin, Scientific and Methodological Basis of Studying the Thermodynamic State of the Atmosphere from the Weather Research Aircraft (Fizmatkniga, Moscow, 2010) [in Russian].
M. A. Strunin, Turbulence in a Cloudy Atmosphere (in Clouds and Near-cloud Space). An Empirical Model of Turbulence in a Cloudy Atmosphere. Reference Manual for Scientists and Meteorological Engineers (Fizmatkniga, Dolgoprudny, 2013) [in Russian].
M. A. Strunin and S. M. Shmeter, “Evaluation of the Turbulent Mixing Coefficient in the Atmosphere from Airborne Measurements,” Izv. Akad. Nauk, Fiz. Atmos. Okeana, No. 1, 32 (1996) [Izv., Atmos. Oceanic Phys., No. 1, 32 (1996)].
A. Kh. Khrgian, Atmospheric Physics, Vol. 1 (Gidrometeoizdat, Leningrad, 1978) [in Russian].
J. C. Kaimal and J. J. Finnigan, Atmospheric Boundary Layer Flows, Their Structure and Measurements (Oxford Univ. Press, New York, Oxford, 1994).
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Translated from Meteorologiya i Gidrologiya, 2021, No. 9, pp. 117-129. https://doi.org/10.52002/0130-2906-2021-9-117-129.
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Volkov, V.V., Strunin, M.A. & Strunin, A.M. Determination of Wind Shear and Turbulence Intensity According to Yak42-D “Roshydromet” Research Aircraft Data. Russ. Meteorol. Hydrol. 46, 640–649 (2021). https://doi.org/10.3103/S1068373921090107
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DOI: https://doi.org/10.3103/S1068373921090107