Now showing items 497-516 of 860

  • 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 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 ...
  • Mixing and general circulation dynamics : theory and observations 

    Tziperman, Eli (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-02)
    This thesis studies the role of cross-isopycnal mixing in general circulation dynamics, from both the theoretical and observational points of view. The first two chapters discuss some theoretical aspects of cross-isopycnal ...
  • Mixing in the North Atlantic Tracer Release Experiment : observations and numerical simulations of Lagrangian particles and passive tracer 

    Sundermeyer, Miles A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-09)
    Mixing and stirring of passive tracer and Lagrangian particles in the open ocean was studied through comparison of observations from the North Atlantic Tracer Release Experiment, a numerical model, and existing theory. ...
  • Mixing processes and hydraulic control in a highly stratified estuary 

    MacDonald, Daniel G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-02)
    This thesis utilizes field data from the Fraser River Estuary, a highly stratified system located in southwestern British Columbia, Canada, to investigate the nature of mixing processes in a highly stratified environment, ...
  • Modal analysis of vertical array receptions for the Heard Island Feasibility Test 

    Sperry, Brian J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-05)
    During the 1991 Heard Island Feasibility Test, a vertical hydrophone array deployed off Monterey, CA, recorded transmissions from a low-frequency acoustic source nearly 18,000 km away. By determining the modal structure ...
  • A modal/WKB inversion method for determining sound speed profiles in the ocean and ocean bottom 

    Casey, Kevin D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-06)
    Two approaches to determining the ocean sound speed profile using measured acoustic modal eigenvalues are examined. Both methods use measured eigenvalues and mode dependent assumed values of the WKB phase integral as ...
  • A model of a Mediterranean salt lens in external shear 

    Walsh, David (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-04)
    A pair of simple models representing the interaction of a continuously stratified f-plane quasigeostrophic lens with a uniform external shear flow is examined. The study is motivated by the desire to understand the ...
  • Model of PAH and PCB bioaccumulation in Mya arenaria and application for site assessment in conjunction with sediment quality screening criteria 

    Levine, Rachel H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-06)
    A review of six methods for deriving sediment quality criteria SQC was conducted. Each approach was analyzed according to cost, difficulty, applicability and reliability. Results of this analysis led to the recommendation ...
  • A model of the equatorial deep jets and the role of the horizontal Coriolis parameter 

    Zhang, Xiaoming (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-01)
    This thesis reviews observational and theoretical work on the equatorial deep jets and work related to the study of the role of the horizontal Coriolis parameter. Most existing analytical models interpret the equatorial ...
  • Modeling a 300 kHz bathymetric sonar system 

    Malmquist, Kenneth A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-09)
    The Deep Submergence Laboratory has developed a family of calibrated high frequency bathymetric sonar systems for underwater survey. It is useful to have a detailed mathematical description of these systems to assist in ...
  • Modeling and control of an autonomous underwater vehicle with combined foil/thruster actuators 

    Jakuba, Michael V. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-02)
    The Sentry AUV represents a radical departure from conventional AUV design, particularly with respect to actuation. The vehicle's combined foil/thruster actuators have the potential to produce a vehicle both maneuverable ...