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Open AccessArticle

Measurement of Atmospheric Turbulence Characteristics by the Ultrasonic Anemometers and the Calibration Processes

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V.E. Zuev Institute of Atmospheric Optics SB RAS, 1 Academician Zuev sq., Tomsk 634055, Russia
2
Institute of Monitoring of Climatic and Ecological Systems SB RAS, 10/3 Academichesky ave., Tomsk 634055, Russia
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(8), 460; https://doi.org/10.3390/atmos10080460
Received: 30 May 2019 / Revised: 19 July 2019 / Accepted: 26 July 2019 / Published: 12 August 2019
(This article belongs to the Special Issue Atmospheric Turbulence Measurements and Calibration)
In ultrasonic equipment (anemometers and thermometers), for the measurement of parameters of atmospheric turbulence, a standard algorithm that calculates parameters from temporary structural functions constructed on the registered data is usually used. The algorithm is based on the Kolmogorov–Obukhov law. The experience of using ultrasonic meters shows that such an approach can lead to significant errors. Therefore, an improved algorithm for calculating the parameters is developed, which allows more accurate estimation of the structural characteristics of turbulent fluctuations, with an error that is not more than 10%. The algorithm was used in the development of a new ultrasonic hardware-software complex, autonomous meteorological complex AMK-03-4, which differs from similar measuring instruments of turbulent atmosphere parameters by the presence of four identical ultrasonic anemometers. The design of the complex allows not only registration of the characteristics of turbulence, but also measurement of the statistical characteristics of the spatial derivatives of turbulent temperature fluctuations and orthogonal components of wind speed along each of the axes of the Cartesian coordinate system. This makes it possible to investigate the space–time structure of turbulent meteorological fields of the surface layer of the atmosphere for subsequent applications in the Monin–Obukhov similarity theory and to study turbulent coherent structures. The new measurement data of the spatial derivatives of temperature at stable stratification (at positive Monin–Obukhov parameters) were obtained, at which the behavior of the derivatives was been investigated earlier. In the most part of the interval of positive Monin–Obukhov parameters, the vertical derivative of the temperature is close to a constant value. This fact can be considered as a new significant result in similarity theory. View Full-Text
Keywords: turbulence; airflow; ultrasonic anemometer; algorithm; structural function; parameter measurement errors turbulence; airflow; ultrasonic anemometer; algorithm; structural function; parameter measurement errors
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Nosov, V.; Lukin, V.; Nosov, E.; Torgaev, A.; Bogushevich, A. Measurement of Atmospheric Turbulence Characteristics by the Ultrasonic Anemometers and the Calibration Processes. Atmosphere 2019, 10, 460.

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