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The dependence of optical turbulence on thermal and mechanical forces over the sea

: Eijk, Alexander M. van; Sprung, Detlev; Sucher, Erik; Eisele, Christian; Seiffer, Dirk; Stein, Karin


Eijk, A.M.J. van ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser Communication and Propagation through the Atmosphere and Oceans V : San Diego, California, August 28, 2016
Bellingham, WA: SPIE, 2016 (Proceedings of SPIE 9979)
Paper 99790R, 8 pp.
Conference "Laser Communication and Propagation through the Atmosphere and Oceans" <5, 2016, San Diego/Calif.>
Conference Paper
Fraunhofer IOSB ()
turbulence; maritime environment; experiment; sonic anemometer; scintillometer

Optical turbulence for over-water conditions was investigated in a long-term experiment over False Bay near Cape Town, South Africa. A sonic anemometer and two boundary-layer scintillometers were deployed to access in-situ turbulence as well as the integrated turbulence over two 1.8 and 8.7 km paths. Statistical analysis reveals spatial temporal variations of the turbulence conditions over False Bay, which might be related to differences in the atmospheric conditions and/or the surface (water) temperatures. An analysis in terms of mechanical and thermal forcing reveals that the latter factor is more dominant in determining the turbulence strength.