2013
DOI: 10.1002/jgrc.20156
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Seismic reflection imaging of shallow oceanographic structures

Abstract: [1] Multichannel seismic (MCS) reflection profiling can provide high lateral resolution images of deep ocean thermohaline fine structure. However, the shallowest layers of the water column (z < 150 m) have remained unexplored by this technique until recently. In order to explore the feasibility of shallow seismic oceanography (SO), we reprocessed and analyzed four multichannel seismic reflection sections featuring reflectors at depths between 10 and 150 m. The influence of the acquisition parameters was quanti… Show more

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Cited by 21 publications
(34 citation statements)
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“…The imaging of the AW nearest to the surface is limited by the acquisition configuration (towed at a fixed depth), and by the imperfect attenuation of the direct wave. To optimally image the shallowest waters (less than 50 m), one needs to employ a customized acquisition system (e.g., Pi et e et al, 2013;Sallarès et al, 2016).…”
Section: Resultsmentioning
confidence: 99%
“…The imaging of the AW nearest to the surface is limited by the acquisition configuration (towed at a fixed depth), and by the imperfect attenuation of the direct wave. To optimally image the shallowest waters (less than 50 m), one needs to employ a customized acquisition system (e.g., Pi et e et al, 2013;Sallarès et al, 2016).…”
Section: Resultsmentioning
confidence: 99%
“…From this and previous observation of ISWs [ Tang et al ., ], it can be concluded that the seismic oceanography is an efficient and effective way to detect the ISWs in a near‐surface region below 40, which was considered to be a challenging zone for the conventional seismic technique [ Piété et al ., ; Biescas et al ., ]. To ensure high‐quality seismic data, there are three primary requirements: (1) optimizing air gun type and array so the direct wave can be suppressed; (2) a small nearest offset (<100 m) for minimizing the blank zone; and (3) a mid‐size vessel for reducing the ambient noise.…”
Section: Discussionmentioning
confidence: 99%
“…The frequency characteristic of seismic source and the geometry of the seismic streamer give vertical and horizontal resolutions of about 10 m and it is used to observe variety of ocean phenomena including internal waves, eddies, currents, thermohaline staircases, and turbulence, from mesoscale to finescale in the various global ocean environments [e.g., Nakamura et al, 2006;Biescas et al, 2008Biescas et al, , 2010Fer et al, 2010;Pinheiro et al, 2010;Sheen et al, 2011;Buffett et al, 2013;Holbrook et al, 2013;Tang et al, 2013Tang et al, , 2014a. However, the conventional geometry used for seismic surveying the subseabed makes it difficult to image the near-surface thermohaline structures typically above 200 m because of the minimum offset between the source and receiver array and significant interference from the high-amplitude direct waves [Carniel et al, 2012;Pi et e et al, 2013;Tang et al, 2014b].…”
Section: Introductionmentioning
confidence: 99%
“…Piété et al (2013) were able to create high resolution images of shallowest layers of the ocean, using small offsets and a system with multiple streamers and a sparker. The result of this study showed a detailed image of the seasonal thermocline at 30 m depth, in a water column ranging from 50 m to 150 m.…”
Section: Introductionmentioning
confidence: 99%
“…Specific designed surveys have its configurations selected according to the processing objective, as done by Piété et al (2013). In this case, most reliable results can be obtained and particular studies can be carried out.…”
Section: Introductionmentioning
confidence: 99%