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Measurement of Turbulence in the Oceanic Mixed Layer Using Synthetic Aperture Radar (Sar) : Volume 9, Issue 5 (13/09/2012)

By George, S. G.

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Book Id: WPLBN0003978756
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: Measurement of Turbulence in the Oceanic Mixed Layer Using Synthetic Aperture Radar (Sar) : Volume 9, Issue 5 (13/09/2012)  
Author: George, S. G.
Volume: Vol. 9, Issue 5
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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L. Tatnal, A. R., & George, S. G. (2012). Measurement of Turbulence in the Oceanic Mixed Layer Using Synthetic Aperture Radar (Sar) : Volume 9, Issue 5 (13/09/2012). Retrieved from http://worldlibrary.net/


Description
Description: Astronautics Research Group, Faculty of Engineering & the Environment, University of Southampton, Southampton, UK. Turbulence in the surface layer of the ocean contributes to the transfer of heat, gas and momentum across the air-sea boundary. As such, study of turbulence in the ocean surface layer is becoming increasingly important for understanding its effects on climate change. Direct Numerical Simulation (DNS) techniques were implemented to examine the interaction of small-scale wake turbulence in the upper ocean layer with incident electromagnetic radar waves. Hydrodynamic-electromagnetic wave interaction models were invoked to demonstrate the ability of Synthetic Aperture Radar (SAR) to observe and characterise surface turbulent wake flows. A range of simulated radar images are presented for a turbulent surface current field behind a moving surface vessel, and compared with the surface flow fields to investigate the impact of turbulent currents on simulated radar backscatter. This has yielded insights into the feasibility of resolving small-scale turbulence with remote-sensing radar and highlights the potential for extracting details of the flow structure and characteristics of turbulence using SAR.

Summary
Measurement of turbulence in the oceanic mixed layer using Synthetic Aperture Radar (SAR)

Excerpt
Alpers, W. R., Campbell, G., Wensink, H., and Zhang, Q.: Underwater topography, in: SAR Marine User's Manual, edited by: Jackson, C. R. and Apel, J. R., National Oceanic and Atmospheric Administration, Washington DC, USA, 245–262, 2004, available at: http://www.sarusersmanual.com/, last access: 15 May 2012.; Archer, P. J.: A Numerical Study of Laminar to Turbulent Evolution and Free-Surface Interaction of a Vortex Ring, Ph. D. thesis, University of Southampton, Southampton, UK, 2008.; Banerjee, S. and MacIntyre, S.: The air-water interface: Turbulence and scalar exchange, in: Advances in Coastal and Ocean Engineering vol. 9: PIV and Water Waves, edited by: Grue, J., Liu, P. L. F. and Pedersen, G. K., World Scientific, Singapore, 181–237, 2004.; Chubb, S. R., Askari, F., Donato, T. F., Romeiser, R., Ufermann, S., Cooper, A. L., Alpers, W. R., and Mango, S. A.: Study of Gulf Stream features with a multifrequency polarimetric SAR from the Space Shuttle, IEEE Trans. Gisci. Remote Sens., 37, 2495–2507, 1999.; Fujimura, A., Matt, S., Soloviev, A., Maingot, C., and Rhee, S. H.: The Impact of Thermal Stratification and Wind Stress on Sea Surface Features in SAR Imagery, IGARSS2011 IEEE Geoscience and Remote Sensing Symposium, Vancouver BC, Canada, 24–29 July 2011, 2037–2040, 2011.; Hennings, I., Romeiser, R., Alpers, W. R., and Viola, A.: Radar imaging of Kelvin arms of ship wakes, Int. J. Remote Sens., 20, 2519–2543, 1999.; Ivanov, A. Y. and Ginzburg, A. I.: Oceanic eddies in synthetic aperture radar images, J. Earth Syst. Sci., 111, 281–295, doi:10.1007/BF02701974, 2002.; Johannessen, J. A., Kudryavtsev, V. N., Akimov, D., Eldevik, T., Winther, N., and Chapron, B.: On radar imaging of current features: 2. Mesoscale eddy and current front detection, J. Geophys. Res., 110, 1–14, doi:10.1029/2004JC002802, 2005.; Khatiwala, S., Primeau, F., and Hall, T.: Reconstruction of the history of anthropogenic \chem{{CO}_2} Concentrations in the Ocean, Nature, 462, 346–350, doi:10.1038/nature08526, 2009.; Kitaigorodskii, S. A. and Lumley, J. L.: Wave-turbulence interactions in the upper ocean. Part I: The energy balance of the interacting fields of surface wind waves and wind-induced three-dimensional turbulence, J. Phys. Oceanogr., 13, 1977–1987, 1983.; Kitaigorodskii, S. A., Donelan, M., Lumley, J. L., and Terray, E. A.: Wave-turbulence interactions in the upper ocean. Part II: Statistical characteristics of wave and turbulent components of the random velocity field in the marine surface layer, J. Phys. Oceanogr., 13, 1988–1999, 1983.; Komori, S., Ueda, H., Ogino, F., and Mizushina, T.: Turbulence structure and transport mechanism at the free surface in an open channel flow, Int. J. Heat Mass Tran., 25, 513–521, 1982.; LeBlond, P. H. and Mysak, L. A.: Waves in the Ocean, Elsevier Science Publishers, Norwich, UK, 1978.; Lyden, J. D., Lyzenga, D. R., Shuchman, R. A., and Swanson, 

 

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