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Article
Mapping Optical Ray Trajectories through Island Wake Vortices
Meteorology and Atmospheric Physics
  • Christopher G. Nunalee, North Carolina State University
  • Ping He, North Carolina State University
  • Sukanta Basu, North Carolina State University
  • Jean Minet, University of Dayton
  • Mikhail Vorontsov, University of Dayton
Document Type
Article
Publication Date
6-1-2015
Abstract
Optical wave propagation through the atmosphere is complicated by organized atmospheric structures, spanning a wide range of length and time scales, which induce spatio-temporal variability in refraction. Therefore, when considering long-range optical ray trajectories, the influence of such structures on the propagation path becomes significantly more complex compared to a hypothetically homogeneous atmosphere. In this paper, we use a coupled mesoscale model and ray tracing framework to analyze the refractive anomalies associated with the wake vortices induced by three geographically diverse islands under various meteorological conditions. We identify organized mesoscale wake vortices (e.g., von Kármán vortices) which are sometimes capable of distorting optical ray trajectories, through ray bending, tens of meters at a range of approximately 50 km. In addition, we find in some cases that vertical oscillations, or perturbations, to the simulated ray trajectories share a frequency with the vortex shedding frequency on the order of hours. At the same time, it is also observed that the intensity and predictability of the wake vortex-induced ray bending varies from case to case. Collectively, these results highlight the value of using mesoscale models in optical wave propagation studies above conventional approaches which do not explicitly consider horizontally heterogeneous atmospheres.
Inclusive pages
355–368
ISBN/ISSN
0177-7971
Comments

Permission documentation is on file.

Publisher
Springer-Verlag Wien
Peer Reviewed
Yes
Citation Information
Christopher G. Nunalee, Ping He, Sukanta Basu, Jean Minet, et al.. "Mapping Optical Ray Trajectories through Island Wake Vortices" Meteorology and Atmospheric Physics Vol. 127 Iss. 3 (2015)
Available at: http://works.bepress.com/mikhail_vorontsov/8/