Now showing items 654-673 of 846

  • Relative sea-level rise and the development of channel-fill and shallow-water sequences on Cape Cod, Massachusetts 

    Gutierrez, Benjamin T. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-01)
    Channel-fill sediments located in shallow-water off the south shore of Cape Cod, Massachusetts, provide a record of the late-Pleistocene and Holocene geological evolution in a post-glacial setting. Though conventionally ...
  • Relative sea-level variations revealed by tide-gauge records of long duration 

    Withnell, Anthony J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-06)
    Trends in mean relative sea-level and pat.terns of occurrence of extreme sea levels are analyzed separately in the two parts of this thesis. In Part 1, twenty-eight of the world's longest tide-gauge records are examined ...
  • Representation of eddies in climate models by a potential vorticity flux 

    Wardle, Richard M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-02)
    This thesis addresses the parameterization of the heat and momentum transporting properties of eddy motions for use in three-dimensional, primitive equation, z-coordinate atmosphere and ocean models. Determining the ...
  • Reproductive traits of pioneer gastropod species colonizing deep-sea hydrothermal vents after an eruption 

    Bayer, Skylar R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-06)
    The colonization dynamics and life histories of pioneer species are vital components in understanding the early succession of nascent hydrothermal vents. The reproductive ecology of pioneer species at deep-sea hydrothermal ...
  • Response of a pendulum spar to 2-dimensional random waves and a uniform current 

    Rodenbusch, George (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1978-08)
    A linearized theory for the response of a circular pendulum spar in 2-dimensional waves and a uniform current is developed. The linear forces on the cylinder are predicted using an approximate potential flow theory for ...
  • The response of the Red Sea to a strong wind jet near the Tokar Gap in summer 

    Zhai, Ping (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-09)
    Remote sensing and in situ observations are used to investigate the ocean response to the Tokar Wind Jet in the Red Sea. The wind jet blows down the pressure gradient through the Tokar Gap on the Sudanese coast, at about ...
  • Ridge segmentation, tectonic evolution and rheology of slow-spreading oceanic crust 

    Escartin Guiral, Javier E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-08)
    Two-thirds of the Earth's surface is oceanic crust formed by magmatic and tectonic processes along mid-ocean ridges. Slow-spreading ridges, such as the Mid-Atlantic Ridge, are discontinuous and composed of ridge segments. ...
  • Ridge waves 

    Harrington, Stephanie A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-06)
    Second-class wave propagation along mid-ocean ridges is investigated in an effort to explain subinertial peaks found in the velocity spectra over the Juan de Fuca Ridge (JdFR, 4 days) and the Iceland-Faeroe Ridge (IFR, ...
  • Robust acoustic signal detection and synchronization in a time varying ocean environment 

    Gieleghem, Ryan T. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)
    Signal detection and synchronization in the time varying ocean environment is a difficult endeavor. The current common methods include using a linear frequency modulated chirped pulse or maximal length sequence as a detection ...
  • The role of biological production in pleistocene atmospheric carbon dioxide variations and the nitrogen isotope dynamics of the southern ocean 

    Sigman, Daniel M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-09)
    This dissertation contributes to the search for a cause of glacial/interglacial variations in atmospheric carbon dioxide. The hypotheses addressed involve changes in low and high-latitude biological export production. A ...
  • The role of colloidal organic matter in the marine geochemistry of PCB’s 

    Brownawell, Bruce J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1986-04)
    Polychlorinated biphenyls (PCBs) were used as model hydrophobic organic compounds (HOC) to study physical~chemical processes which affect the speciation and fate of HOC in coastal environments. The focus of this study ...
  • The role of denitrification in the nitrogen cycle of New England salt marshes 

    Hamersley, Michael R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-12)
    I used direct measurements of nitrogen gas (N2) fluxes and a 15N stable isotope tracer to determine the contribution of denitrification to salt marsh sediment N cycling. Denitrification in salt marsh tidal creekbottoms ...
  • The role of heterotrophic microflagellates in plankton communities 

    Caron, David A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1984-06)
    The distribution and feeding behavior of bacterivorous micro flagellates (2-20 μm protozoa) and their ingestion by copepods were examined in an attempt to assess the importance of these protozoa as a trophic link ...
  • The role of sulfur in salt marsh metabolism 

    Howarth, Robert W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979-02)
    The rate of sulfate reduction in stands of dwarf Spartina alterniflora in the Great Sippewissett Salt Marsh is approximately 75 moles S04 m2 year-1. This is the highest rate reported for any natural ecosystem. Sulfate ...
  • Rotating convection driven by differential bottom heating and its application 

    Park, Young-Gyu (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-09)
    A convection experiment was done with a rotating rectangular tank as a model of oceanic meridional overturning circulation. Heat flux was fixed at one bottom end of the tank using an electrical heater. Temperature was ...
  • Sands and environmental conditions impact the abundance and persistence of the fecal indicator bacteria Enterococcus at recreational beaches 

    Halliday, Elizabeth (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)
    The marine fecal indicator Enterococcus is measured at beaches to detect fecal contamination events, and beaches are closed to bathers when Enterococcus is found to exceed the federally mandated limit. This dissertation ...
  • Satellite-derived sea surface temperature, mesoscale variability, and foraminiferal production in the North Atlantic 

    Wolfteich, Carl M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-02)
    Planktonic foraminiferal flux was collected at four sediment trap locations spanning a 34° latitude range in the North Atlantic during 1988-1990. Satellite-derived sea surface temperature (SST) and CTD data were integrated ...
  • Scale closure in upper ocean optical properties : from single particles to ocean color 

    Green, Rebecca E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2002-06)
    Predictions of chlorophyll concentration from satellite ocean color are an indicator of phytoplankton primary productivity, with implications for foodweb structure, fisheries, and the global carbon cycle. Current models ...
  • Scattering of coastal-trapped waves by irregularities in coastline and topography 

    Wilkin, John L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-09)
    A study is conducted of the scattering of freely-propagating subinertial frequency coastal-trapped waves (CTWS) by large variations in coastline and topography using analytical and numerical techniques. Particular attention ...
  • Scattering of the low-mode internal tide at the Line Islands Ridge 

    Haji, Maha N. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-02)
    The scattering of low-mode internal tides by ocean-floor topography is extensively studied through analytical models and field observations at the Line Islands Ridge (LIR). An existing Green function method is utilized ...