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

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.