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SAR observation of rip currents off the Portuguese coast
da Silva, J.C.B. (2008). SAR observation of rip currents off the Portuguese coast, in: Barale, V. et al. (Ed.) Remote sensing of the European seas. pp. 399-410
In: Barale, V.; Gade, M. (Ed.) (2008). Remote sensing of the European seas. Springer Science+Business Media: Heidelberg. ISBN 978-1-4020-6771-6. XXII, 514 pp. https://dx.doi.org/10.1007/978-1-4020-6772-3
Beschikbaar in  Auteur 
Trefwoorden
    Equipment > Remote sensing equipment > Radar > Microwave radar > Synthetic aperture radar
    Motion > Water motion > Water currents > Nearshore currents > Rip currents
    Portugal
    Portugal [Marine Regions]
    Marien/Kust
Auteur  Top 
  • da Silva, J.C.B.
Abstract
    Signatures of rip currents can be identified in SAR images and aerial photographs of the near-shore. An area on the Portuguese West coast (bathymetry and wave climate of which are briefly described) was studied. An image corresponding to low wind speed conditions is shown, where a series of rip-like cell features are consistent with rip current morphology. A simple model is presented to explain the signatures, based on wind contrast due to the relative water motion within rip currents. The model is discussed for near-threshold wind conditions of Bragg wave excitation.
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