Thesis (M.S.)--Joint Program in Oceanography/ Applied Ocean Science and Engineering, Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution, 2006. / "September 2006." Description based on title screen as viewed on June 8, 2010. DTIC Descriptor(s): Ocean Waves, Water Waves, Ripples, Side Looking Sonar, Ocean Bottom, Frequency, Detection, Sites, Theses, Depth, Buried Objects, Mines(Ordnance), Secondary Waves, Scientists, Offshore, Sediments, Acoustic Data, Data Acquisition, Storms, Sand, Motion, Models, Surface Waves, Angles Includes bibliographical references (leaves 94-96). Also available in print.

Thesis (Ph. D. in Physical Oceanography)--Naval Postgraduate School, March 2003. / Dissertation supervisor: Batteen, Mary L. "March 2003." Includes bibliographical references (p. 167-168). Also available in print. Mode of access: World Wide Web.

Thesis (M.A.)--University of Texas at Austin, 1986. / Vita. Includes bibliographical references (leaves 111-118).

Inaug.-diss.--Jena. / Lebenslauf. "Literaturverzeichnis": p. [84]-89.

Thesis (Ph. D.)--University of Texas at Austin, 2003. / Available also in an electronic version.

Thesis (M.S.)--Joint Program in Oceanography/ Applied Ocean Science and Engineering, Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution, 2006. / "September 2006." Bibliography: p. 94-96.

Thesis (Master of Science)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution,2007. / Bibliography: p. 43-45.

An 80 km seismic refraction line was recorded on an array of three ocean bottom seismometers located 5 km west of the northern tip of Explorer ridge and parallel to Revere-Dellwood fracture zone on the Pacific plate. One reversed and two split-spread profiles have been obtained. The combined use of rotated SV component and polarization filtered record sections enabled identification and timing of the refracted S-wave on most sections. The travel time - distance relation for both P and S waves is interpreted in the intercept time (tau) and ray parameter domain using the technique introduced by Bessonova et al. (1974). This enables application of tau inversion to give extremal bounds for velocity-depth curves. A linearized inversion technique is applied to give the smoothest velocity-depth profiles consistent with the travel time data. Amplitude analysis using disk ray theory synthetic seismograms further refine the P-wave velocity-depth models. The final P- and S-wave velocity-depth profiles show a general increase of velocity with depth and no distinct structural discontinuities. A normal oceanic crustal thickness of approximately 6.5 km and an anomalously low Pn velocity of 7.3 km sec⁻¹ are interpreted. The existence of an abnormally thick crust (8-10 km}., on the opposite side of the ridge in Explorer plate, determined in other studies, contrasts markedly with the results of this research. Such a contrast lends support to the proposal that the complex structure and thick crust are the result of compressive interaction between the young, small Explorer plate and the older, larger North America plate. Values of Poisson's ratio in the range of 0.25 to 0.32 are determined for the crustal material but better resolution of the velocity-depth profiles is required before a meaningful geological interpretation can be made. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

Graduation date: 1968

Detailed current profiles between the sediment-water interface and 20 cm above it reveal a viscous sublayer in the bottom boundary layer on the Oregon continental shelf. Data from three field experiments are used to test fundamental assumptions about boundary layer flow in the ocean. The first study, discussed in Chapter 1, evaluates the hypothesis that, in the absence of the obvious influence of topographic irregularities, the flow behaves like a universally similar, neutrally-buoyant flow over a smooth wall. The second study, discussed in Chapter 2, evaluates the influence which irregular small-scale topography may have on the near-bed flow, while the third, discussed in Chapter 3, examines streamwise velocity fluctuations in the viscous Sublayer and buffer layer and evaluates the hypothesis that spectra from the viscous sublayer and buffer layer of laboratory and geophysical boundary layer flows can be reduced to universal forms. although the thickness of the viscous sublayer scales with v/u, as required by universal similarity, the non-dimensional sublayer thickness is not as constant as in neutrally-buoyant laboratory flows. Even in the absence of the obvious effects of bottom irregularities, the near-bed flow is not as simple as smooth-walled boundarylayer flows in the laboratory. In the second study, it is shown that when the near-bed flow experiences resistance due to form drag as well as skin friction, the constant stress boundary layer assumption is not valid close to the sediment-water interface. Th the third study, it is shown that non-dimensionalized spectra of streamwise velocity fluctuations in the viscous sublayer and buffer layer at the ocean floor are very similar to those found in the laboratory. / Graduation date: 1982