one publication added to basket [220373] | 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
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Keywords |
Equipment > Remote sensing equipment > Radar > Microwave radar > Synthetic aperture radar Motion > Water motion > Water currents > Nearshore currents > Rip currents ANE, Portugal [Marine Regions] Marine/Coastal |
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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