Now showing items 674-693 of 845

  • A search for layering in the oceanic crust 

    Collins, John A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-10-06)
    The results of numerous seismic refraction and reflection experiments have shown that the seismic structure of the oceanic crust can be usefully parameterized by a small number of locally horizontal layers within which ...
  • Search methods for an autonomous underwater vehicle using scalar measurements 

    Burian, Erik A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-07-18)
    The continuing development of the autonomous underwater vehicle as an oceanographic research tool has opened up the realm of scientific possibility in the field of deep ocean research. The ability of a vehicle to travel ...
  • The seasonal and interannual variability of the West Greenland Current system in the Labrador Sea 

    Rykova, Tatiana A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-06)
    The Labrador Sea, as one of a few places of deep water formation, plays an important role in the Meridional Overturning Circulation. While the interior of the Labrador Sea, where the deepest convection takes place, is ...
  • Seasonal oscillations in a mid-latitude ocean with barriers to deep flow 

    Firing, Eric (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1978-08)
    A two-layer linear analytic model is used to study the response of the mid-latitude ocean to the seasonal variation of the windstress. The most important component of the response is a barotropic quasi-steady Sverdrup ...
  • Seasonal variability in the intermediate water of the eastern North Atlantic 

    Bray, Nancy Amanda (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-08)
    Observational evidence of seasonal variability below the main thermocline in the eastern North Atlantic is described, and a theoretical model of oceanic response to seasonally varying windstress forcing is constructed to ...
  • Sediment deposition in the lower Hudson River estuary 

    Woodruff, Jonathan D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-09)
    This study uses geophysical and sedimentological data collected from the Lower Hudson River estuary to identify the depositional response of the estuary to high river discharge events. Erosional and depositional environments ...
  • Sedimentary lipids as indicators of depositional conditions in the coastal Peruvian upwelling regime 

    McCaffrey, Mark A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-05)
    This thesis assesses the utility of various sedimentary lipids as indicators of short-term changes in depositional conditions and sedimentary organic matter sources in the coastal upwelling regime off of Peru. A variety ...
  • Sedimentary processes on the continental slope off New England 

    MacIlvaine, Joseph Chad (Woods Hole Oceanographic Institution, 1973-09)
    A detailed study of a small (5000 km2) area of the continental slope south of Cape Cod, Massachusetts, was conducted. Bathymetry, 3.5 kHz profiles, seismic profiles, suspended sediment analysis, bottom photographs, television ...
  • Seismic and gravitational studies of melting in the mantle's thermal boundary layers 

    Van Ark, Emily M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-06)
    This thesis presents three studies which apply geophysical tools to the task of better understanding mantle melting phenomena at the upper and lower boundaries of the mantle. The first study uses seafloor bathymetry and ...
  • Seismic and magnetic constraints on the structure of upper oceanic crust at fast and slow spreading ridges 

    Hussenoeder, Stefan A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-09)
    The upper ocean crust contains a comprehensive record of the shallow geological processes active along the world's mid-ocean ridge system. This thesis examines the magnetic and seismic structure of the upper crust at two ...
  • The seismic attenuation structure of the East Pacific Rise 

    Wilcock, William S. D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-06)
    Studies of seismic propagation through oceanic crust have contributed enormously to our understanding of the generation and evolution of oceanic crust However, such work has largely been confined to the seismic velocity ...
  • Seismic constraints on shallow crustal processes at the East Pacific Rise 

    Christeson, Gail L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-02)
    This thesis is concerned with understanding how oceanic crust is emplaced at mid-ocean ridges. The emphasis is upon fast-spreading ridges, and the use of seismic techniques to image the uppermost several hundred meters ...
  • Seismic scattering of low-grazing-angle acoustic waves incident on the seafloor 

    Greaves, Robert J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
    The goal of this thesis is to develop a methodology to interpret sound scattered from the seafloor in terms of seafloor structure and subseafloor geological properties. Specifically, this work has been directed towards ...
  • Seismicity and structure of the Orozco transform fault from ocean bottom seismic observations 

    Trehu, Anne M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-02)
    In this thesis, seismic waves generated by sources ranging from 2.7 kg shots of TNT to magnitude 5 earthquakes are studied in order to determine the seismic activity and crustal structure of the Orozco transform fault. ...
  • Self consistent bathymetric mapping from robotic vehicles in the deep ocean 

    Roman, Christopher N. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-06)
    Obtaining accurate and repeatable navigation for robotic vehicles in the deep ocean is difficult and consequently a limiting factor when constructing vehicle-based bathymetric maps. This thesis presents a methodology to ...
  • The sensitivity and predictability of mesoscale eddies in an idealized model ocean 

    Haidvogel, Dale B. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1976-04)
    Two numerical applications of two-level quasigeostrophic theory are used to investigate the interrelationships of the mean and mesoscale eddy fields in a closed-basin ocean model. The resulting techniques provide a more ...
  • Sensitivity of a general circulation inverse model to sub-grid scale parametrization coefficients 

    Won, Eric C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-08)
    Ocean modellers seek to understand the circulation of the oceans, or portions thereof, by developing models of the ocean they can solve. This tractability constraint forces ocean modellers to make choices. Naturally, ...
  • The sensory mediation of symbiosis between hyperiid amphipods and salps 

    Diebel, Carol E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-03)
    Hyperiid amphipods are open ocean crustaceans which use gelatinous planktonic animals for food, shelter, and brooding space for their offspring. These associations involve varying degrees of host specificity; and there ...
  • Setup in the surfzone 

    Apotsos, Alex (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-09)
    Surfzone wave height transformation and wave-breaking-driven increases in the mean sea level (setup) are examined on alongshore-uniform beaches with alongshore homogeneous and inhomogeneous wave forcing. While previously ...
  • Sexual patterns of monooxygenase function in the liver of marine teleosts and the regulation of activity by estradiol 

    Gray, Elisabeth S. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-05)
    Sex differences in hepatic microsomal cytochrome P-450 and monooxygenase activities were investigated in the marine teleosts scup (Stenotomus chrysops) and winter flounder (Pseudopleuronectes americanus). Microsomal ...