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| Titel |
First images and orientation of fine structure from a 3-D seismic oceanography data set |
| VerfasserIn |
T. M. Blacic, W. S. Holbrook |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 6, no. 2 ; Nr. 6, no. 2 (2010-04-20), S.431-439 |
| Datensatznummer |
250003461
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| Publikation (Nr.) |
 copernicus.org/os-6-431-2010.pdf |
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| Zusammenfassung |
| We present 3-D images of ocean fine structure from a unique
industry-collected 3-D multichannel seismic dataset from the Gulf of Mexico
that includes expendable bathythermograph casts for both swaths. 2-D
processing reveals strong laterally continuous reflections throughout the
upper ~800 m as well as a few weaker but still distinct reflections as
deep as ~1100 m. We interpret the reflections to be caused by
reversible fine structure from internal wave strains. Two bright reflections
are traced across the 225-m-wide swath to produce reflection surface images
that illustrate the 3-D nature of ocean fine structure. We show that the
orientation of linear features in a reflection can be obtained by
calculating the orientations of contours of reflection relief, or more
robustly, by fitting a sinusoidal surface to the reflection. Preliminary 3-D
processing further illustrates the potential of 3-D seismic data in
interpreting images of oceanic features such as internal wave strains. This
work demonstrates the viability of imaging oceanic fine structure in 3-D and
shows that, beyond simply providing a way visualize oceanic fine structure,
quantitative information such as the spatial orientation of features like
fronts and solitons can be obtained from 3-D seismic images. We expect
complete, optimized 3-D processing to improve both the signal to noise ratio
and spatial resolution of our images resulting in increased options for
analysis and interpretation. |
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