Now showing items 268-287 of 891

    • Estimating open-ocean boundary conditions : sensitivity studies 

      Gunson, James R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-08)
      The problem of estimating boundary and initial conditions for a regional open-ocean model is addressed here. With the objective of mimicking the SYNOP experiment in the Gulf Stream system, a meandering jet is modeled by ...
    • Estimating phytoplankton growth rates from compositional data 

      Thomas, Lorraine (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-02)
      I build on the deterministic phytoplankton growth model of Sosik et al. by introducing process error, which simulates real variation in population growth and inaccuracies in the structure of the matrix model. Adding a ...
    • Estimation and correction of geometric distortions in side-scan sonar images 

      Cobra, Daniel Távora de Queiroz (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-03)
      This thesis introduces a new procedure for the enhancement of acoustic images of the bottom of the sea produced by side-scan sonars. Specifically, it addresses the problem of estimating and correcting geometric distortions ...
    • Estimation and tracking of rapidly time-varying broadband acoustic communication channels 

      Li, Weichang (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-02)
      This thesis develops methods for estimating wideband shallow-water acoustic communication channels. The very shallow water wideband channel has three distinct features: large dimension caused by extensive delay spread; ...
    • Estimation of planetary wave parameters from the data of the 1981 ocean acoustic tomography experiment 

      Chiu, Ching-Sang (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1985-08)
      Using the maximum-likelihood estimation method and minimization techniques, quasi-geostrophic wave solutions were fitted to the observations of the 1981 Ocean Acoustic Tomography Experiment. The experiment occupied a ...
    • Estimation of sea surface wave spectra using acoustic tomography 

      Miller, James H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-08)
      This thesis develops a new technique for estimating quasi-homogeneous and quasi-stationary sea surface wave frequency-direction spectra using acoustic tomography. The analysis of acoustic (mode and ray) phase and travel ...
    • Evaluating mantle and crustal processes using isotope geochemistry 

      Saal, Alberto E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-09)
      Geochemical studies are fundamental for understanding how the dynamic Earth works and evolves. These studies place constraints on the composition, formation, age, distribution, evolution and scales of geochemically ...
    • Evaluation of GEOSAT data and application to variability of the Northeast Pacific Ocean 

      Campbell, Jeffrey W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-09)
      A portion of the northeast Pacific ocean was chosen within which to evaluate and use altimetric data from the U.S. Navy Geodetic Satellite GEOSAT. The zero-order accuracy of the major GEOSAT geophysical data record (GDR) ...
    • Evaluation of transport relative to the tidal mixing front on southern Georges Bank 

      Katrein, Jody M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-09)
      As part of Phase III of the U.S. GLOBEC Georges Bank program, drogued drifters and dye tracer were released into the pycnocline on the southern flank of Georges Bank to measure advective and diffusive transport relative ...
    • Evaluation of vector sensors for adaptive equalization in underwater acoustic communication 

      Lewis, Matthew R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-09)
      Underwater acoustic communication is an extremely complex field that faces many challenges due to the time-varying nature of the ocean environment. Vector sensors are a proven technology that when utilizing their directional ...
    • Evolution of anthropogenic Pb and Pb isotopes in the deep North Atlantic Ocean and the Indian Ocean 

      Lee, Jong-Mi (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-06)
      Pb and Pb isotopes in the ocean have varied on decadal to centennial time scales due to anthropogenic Pb inputs. Thus, tracing the temporal variation of Pb and Pb isotopes in the ocean provides information on the major ...
    • The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers 

      Behn, Mark D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2002-06)
      This thesis investigates the evolution of lithospheric deformation and crustal structure from continental margins to mid-ocean ridges. The first part (Ch. 2) examines the style of segmentation along the U.S. East Coast ...
    • Evolution of oceanic gabbros : in-situ and ancient examples 

      Kvassnes, Astri Jæger Sweetman (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2004-06)
      This study is a geochemical investigation into the accretion of lower oceanic crust and processes of shallow melt-rock reaction at mid-ocean ridges. Major-, trace-elements, and isotopes from whole-rocks and minerals from ...
    • Evolution of oceanic margins : rifting in the Gulf of California and sediment diapirism and mantle hydration during subduction 

      Miller, Nathamiel C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-06)
      This thesis investigates three processes that control the evolution of oceanic margins. Chapter 2 presents seismic images of a ~2-km-thick evaporite body in Guaymas Basin, central Gulf of California. In rifts, evaporites ...
    • The evolution of the Indian Ocean triple junction and the finite rotation problem 

      Tapscott, Christopher Robert (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979-06)
      A major goal in the study of plate tectonics is the acquisition of a knowledge of the history of relative motion among the rigid plates of the earth's lithosphere. The three papers of this thesis contribute to this effort ...
    • Evolution of the Irminger Current anticyclones in the Labrador Sea from hydrographic data 

      Rykova, Tatiana A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-06)
      The continuous supply of heat and fresh water from the boundaries to the interior of the Labrador Sea plays an important role for the dynamics of the region and in particular, for the Labrador Sea Water formation. Thus, ...
    • The evolution of upper ocean thermal structure at 10°N, 125°W during 1997-1998 

      Farrar, J. Thomas (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-09)
      In this thesis I have endeavored to determine the factors and physical processes that controlled SST and thermocline depth at 10°N, 125°W during the Pan American Climate Study (PACS) field program. Analysis based on the ...
    • Evolutionary and ecological genomics in deep-sea organisms 

      Herrera Monroy, Santiago (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-02)
      Hydrothermal vents and coral ecosystems are conspicuous biological hotspots in the deep-sea. These ecosystems face increasing threats from human activities. Having thorough taxonomic inventories as well as understanding ...
    • Evolutionary demography of structured two-sex populations and sex ratios 

      Shyu, Esther (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-09)
      Males and females may differ in stage-specific survival, maturation, fertility, or mating availability. These demographic differences, in turn, affect population growth rates, equilibrium structure, and evolutionary ...
    • Evolutionary patterns within the Anthozoa (phylum Cindaria) reflected in ribosomal gene sequences 

      Berntson, Ewann A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-04)
      This thesis project assesses phylogenetic relationships within the phylum Cnidaria, at the subclass level within the Class Anthozoa, and at the ordinal level within the Subclass Octocorallia. Traditional cladistics using ...