Now showing items 497-516 of 879

    • Measuring surface ocean wave height and directional spectra using an Acoustic Doppler Current Profiler from an autonomous underwater vehicle 

      Haven, Scott (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)
      The Acoustic Doppler Current Profiler (ADCP) is a proven technology which is capable of measuring surface wave height and directional information, however it is generally limited to rigid, bottom mounted applications which ...
    • Mechanical and geological controls on the long-term evolution of normal faults 

      Olive, Jean-Arthur L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-02)
      This thesis investigates the long-term evolution of rift-bounding normal faults in extensional environments. My main objective is to develop a theoretical framework that explains the controls on maximum fault offset in ...
    • Mechanisms and variability of salt transport in partially-stratified estuaries 

      Bowen, Melissa M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-02)
      The variability of salt transport determines the variation of the length of the salinity intrusion and the large-scale density gradient in an estuary. This thesis contains three studies that address salt transport and ...
    • Mechanisms for enhanced turbulence in the Drake Passage region of the Southern Ocean 

      Merrifield, Sophia T. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-06)
      The Southern Ocean is one of the most energetic regions of the world ocean due to intense winds and storm forcing, strong currents in the form of the Antarctic Circumpolar Current (ACC) interacting with steep topography, ...
    • Mechanisms of action for aryl hydrocarbon receptor ligands in the PLHC-1 cell line 

      Hestermann, Eli V. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-12)
      Aryl hydrocarbon receptor (AHR) expression and activity was characterized in the teleost hepatoma cell line, PLHC-1. This work was carried out in order to gain insights into mechanisms of halogenated aromatic hydrocarbon ...
    • Mechanisms of heat transport through the floor of the equatorial Pacific Ocean 

      Crowe, John (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1981-02)
      The equatorial Pacific heat flow low, a major oceanic geothermal anomaly centered on the equatorial sediment bulge, was investigated using deeply penetrating heat flow probes (6-11 meters penetration) within three ...
    • Mechanisms of metal release from contaminated coastal sediments 

      Kalnejais, Linda H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-09)
      The fate of trace metals in contaminated coastal sediments is poorly understood, yet critical for effective coastal management. The aim of this thesis is to investigate and quantify the mechanisms leading to the release ...
    • Mechanisms of turbulent mixing in the Continental Shelf bottom boundary layer 

      Shaw, William J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-09)
      The bottom boundary layer is an important dynamical region of shallow water flows. In this thesis, the problem of turbulent mixing in the coastal bottom boundary layer is investigated with a unique set of field measurements ...
    • Meridional circulation in the tropical North Atlantic 

      Friedrichs, Marjorie A. M. (Woods Hole Oceanographic Institution, 1993-01)
      A transatlantic CTD/ADCP section nominally located at 11°N was carried out in March 1989. In this paper relative geostrophic velocities are computed from these data via the thermal wind balance, with reference level choices ...
    • Mesoscale variability and mean flow interaction near the Gulf Stream as seen by satellite altimetry and numerical modelling 

      Botella, Juan (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-09)
      The interaction between the eddy field and the mean flow near the Gulf Stream is studied here using satellite altimeter measurements and an eddy resolving numerical modeL. The eddy vorticity flux in the quasigeostrophic ...
    • Metapopulation dynamics of the softshell clam, Mya arenaria 

      Strasser, Carly A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-06)
      In this dissertation, I explored metapopulation dynamics and population connectivity, with a focus on the softshell clam, Mya arenaria. I first worked towards developing a method for using elemental signatures retained ...
    • Microbial cycling of marine high molecular weight dissolved organic matter 

      Sosa, Oscar A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-06)
      Microorganisms play a central role mediating biogeochemical cycles in the ocean. Marine dissolved organic matter (DOM) – a reservoir of organic solutes and colloids derived from plankton is a major source of carbon, ...
    • Microbial food web interactions in two Long Island embayments 

      Boissonneault Cellineri, Katie Rose (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-09)
      Phytoplankton mortality (herbivory) and bacterivory were examined experimentally in West Neck Bay and Coecles Harbor, Long Island, NY from April through September, 1998. Small algae (<5 μm diameter) dominated phytoplankton ...
    • Microbial interactions associated with biofilms attached to Trichodesmium spp. and detrital particles in the ocean 

      Hmelo, Laura R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-06)
      Quorum sensing (QS) via acylated homoserine lactones (AHLs) was discovered in the ocean, yet little is known about its role in the ocean beyond its involvement in certain symbiotic interactions. The objectives of this ...
    • Microbial production and consumption of marine dissolved organic matter 

      Becker, Jamie W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-06)
      Marine phytoplankton are the principal producers of oceanic dissolved organic matter (DOM), the organic substrate responsible for secondary production by heterotrophic microbes in the sea. Despite the importance of DOM ...
    • Microbial size spectra from diverse marine ecosystems 

      Gin, Karina Y. H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-06)
      Characteristics of microbial size spectra (bacteria and phytoplankton) were examined in relation to changes in ecosystem productivity and environmental perturbations. Samples were obtained from productive coastal waters ...
    • Migratory patterns of American shad (Alosa sapidissima) revealed by natural geochemical tags in otoliths 

      Walther, Benjamin D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-02)
      Geochemical signatures in the otoliths of diadromous fishes may allow for retrospective analyses of natal origins. In an assessment of river-specific signatures in American shad (Alosa sapidissima), an anadromous clupeid ...
    • Mitochondrial DNA sequence variation in North Atlantic long-finned pilot whales, Globicephala melas 

      Siemann, Liese A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-05)
      I sequenced mitochondrial DNA (mtDNA) from 59 long-finned pilot whales (Globicephala melas) that stranded on the coasts of Cape Cod, Newfoundland, Nova Scotia, Scotland, and England or were caught by commercial fisheries ...
    • Mitochondrial genomics and Northwestern Atlantic population genetics of marine annelids 

      Jennings, Robert M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-09)
      The overarching goal of this thesis was to investigate marine benthic invertebrate phylogenetics and population genetics, focused on the phylum Annelida. Recent expansions of molecular methods and the increasing diversity ...
    • Mixing and dynamics of the Mediterranean outflow 

      Baringer, Molly O. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-10)
      Hydrographic and expendable current profiler (XCP) data taken during the Gulf of Cadiz Expedition in September 1988 are analyzed to diagnose the mixing and dynamics of the Mediterranean outflow. The overall structure of ...