Abstract
Seismic reflection profiling technique, previously used to image the sediments beneath the seafloor, is herein used to image the ocean’s water columns, namely, seismic oceanography. The imaging has a much higher lateral resolution (~10 m) than traditional oceanographic measurements such as CTD (usually >100 m). Prior work on seismic oceanography was limited on imaging in two dimensional vertical transects. This work develops the three-dimensional (3D) seismic oceanography technique to image the 3D dynamic processes of water columns. 3D multichannel seismic survey data in a seismic volume of 625 km3 in the Gulf of Mexico are processed and produce images containing detailed 3D water-column structures near the continental slope. Some mesoscale and sub-mesoscale structures are visualized from different viewing angles. Spectral analyses of the seismic images reveal 3D spatial features of the structures, suggesting the potential of 3D seismic oceanography. [Work supported by NOAA.]
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