Exploration of length scales of the Kolmogorov turbulence spectrum in the atmospheric surface layer

Detlev Sprung; Erik Sucher; A. M. J. van Eijk

doi:10.1117/12.3034012

18 November 2024 Exploration of length scales of the Kolmogorov turbulence spectrum in the atmospheric surface layer

Detlev Sprung, Erik Sucher, A. M. J. van Eijk

Proceedings Volume 13194, Environmental Effects on Light Propagation and Adaptive Systems VII; 1319407 (2024) https://doi.org/10.1117/12.3034012
Event: Remote Sensing, 2024, Edinburgh, United Kingdom

Abstract

In adaptive optics and wave propagation processes, understanding the Kolmogorov turbulence spectrum is essential. It serves as a fundamental framework for assessing the impact of atmospheric turbulence on various electro-optical applications, including imaging, laser power transmission, and optical communication. At the heart of this investigation lies the characterization of the atmospheric turbulence parameter C²_n, which quantifies the strength of the optical turbulence. The Kolmogorov turbulence spectrum delineates the distribution of energy across different length scales within turbulent flows, from low to high frequencies. It encompasses the energy-containing eddies down to their eventual dissipation, governed by characteristic length scales such as the integral scale, outer scale, inner scale, and the Kolmogorov micro-scale. In this study, ultrasonic anemometers measurements at different heights on a 64m-high tower provide crucial data on temperature and wind speed, enabling the characterization of characteristic length scales. Additionally, a laser scintillometer operated close to the ground supplies turbulence measurements. Variance spectra of temperature and wind velocity measurements are investigated to retrieve information about atmospheric turbulence. By scrutinizing the height and stability dependencies of these spectra, deeper insights into the intricate interplay between atmospheric turbulence and environmental conditions are gained.

Citation Download Citation

Detlev Sprung, Erik Sucher, and A. M. J. van Eijk "Exploration of length scales of the Kolmogorov turbulence spectrum in the atmospheric surface layer", Proc. SPIE 13194, Environmental Effects on Light Propagation and Adaptive Systems VII, 1319407 (18 November 2024); https://doi.org/10.1117/12.3034012

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