Mesoscale modeling of optical turbulence (C2n) utilizing a novel physically-based parameterization

Ping He; Sukanta Basu

doi:10.1117/12.2188227

4 September 2015 Mesoscale modeling of optical turbulence (C²_n) utilizing a novel physically-based parameterization

Ping He, Sukanta Basu

Proceedings Volume 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV; 96140K (2015) https://doi.org/10.1117/12.2188227
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

In this paper, we propose a novel parameterization for optical turbulence (C²_n) simulations in the atmosphere. In this approach, C²_n is calculated from the output of atmospheric models using a high-order turbulence closure scheme. An important feature of this parameterization is that, in the free atmosphere (i.e., above the boundary layer), it is consistent with a well-established C²_n formulation by Tatarskii. Furthermore, it approaches a Monin-Obukhov similarity-based relationship in the surface layer. To test the performance of the proposed parameterization, we conduct mesoscale modeling and compare the simulated C²_n values with those measured during two field campaigns over the Hawaii island. A popular regression-based approach proposed by Trinquet and Vernin (2007) is also used for comparison. The predicted C²_n values, obtained from both the physically and statistically-based parameterizations, agree reasonably well with the observational data. However, in the presence of a large-scale atmospheric phenomenon (a breaking mountain wave), the physically-based parameterization outperforms the statistically-based one.

Citation Download Citation

Ping He and Sukanta Basu "Mesoscale modeling of optical turbulence (C²_n) utilizing a novel physically-based parameterization", Proc. SPIE 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV, 96140K (4 September 2015); https://doi.org/10.1117/12.2188227

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