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Proceedings Paper

Retrieval of structure functions of air temperature and refractive index from large eddy simulations of the atmospheric boundary layer
Author(s): Chris Wilson; Alexander M.J van Eijk; Evgeni Fedorovich
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Paper Abstract

A methodology is presented to infer the refractive-index structure function parameter and the structure parameters for temperature and humidity from numerical simulations of the turbulent atmospheric convective boundary layer (CBL). The method employs spatial and temporal averaging of multiple realizations of the CBL flow field reproduced by a large-eddy simulation (LES) of the atmosphere. The Cn2 values yielded by LES-based approach agree fairly well with Cn2 values predicted by the Monin-Obukhov similarity theory. In this respect, the Cn2 retrieval from the LES data is promising for evaluating the vertical profile of Cn2 throughout the entire CBL. Under the considered CBL conditions and for the selected optical wavelength of 0.55 μm the value of Cn2 was found to be dominated by the CT2 contribution in the first few hundred meters above the surface, whereas the CTq contribution became significant aloft.

Paper Details

Date Published: 25 September 2013
PDF: 9 pages
Proc. SPIE 8874, Laser Communication and Propagation through the Atmosphere and Oceans II, 887408 (25 September 2013); doi: 10.1117/12.2023990
Show Author Affiliations
Chris Wilson, The Univ. of Oklahoma (United States)
Alexander M.J van Eijk, TNO (Netherlands)
LUNAM, CNRS, Univ. Ecole Centrale de Nantes (France)
Evgeni Fedorovich, The Univ. of Oklahoma (United States)

Published in SPIE Proceedings Vol. 8874:
Laser Communication and Propagation through the Atmosphere and Oceans II
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel, Editor(s)

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