Now showing items 534-553 of 898

    • 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 ...
    • A model of the temporal and spatial distribution of carbon monoxide in the mixed layer 

      Kettle, A. James (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-06)
      A field experiment demonstrated the presence of a diurnal cycle in the concentration of carbon monoxide ([CO]) in the upper ocean at the BATS site. A series of laboratory experiments and numerical simulations were carried ...
    • 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 ...
    • Modeling and frequency tracking of marine mammal whistle calls 

      Severson, Jared (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-02)
      Marine mammal whistle calls present an attractive medium for covert underwater communications. High quality models of the whistle calls are needed in order to synthesize natural-sounding whistles with embedded information. ...
    • Modeling convection in the Greenland Sea 

      Bhushan, Vikas (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-09)
      A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic ...
    • Modeling of monostatic bottom backscattering from three-dimensional volume inhomogeneities and comparisons with experimental data 

      Li, Dan (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-09)
      Acoustic propagation in the ocean inevitably encounters inhomogeneities of various types, which give rise to scattering. Acoustic scattering from rough water /bottom interfaces comprised of exposed rocks and sea mountains ...
    • Modeling the processes affecting larval haddock (Melanogrammus aeglefinus) survival on Georges Bank 

      Petrik, Colleen M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-02)
      The ultimate goal of early life studies of fish over the past century has been to better understand recruitment variability. Recruitment is the single most important natural event controlling year-class strength and ...
    • Modeling wind forcing in phase resolving simulation of nonlinear wind waves 

      Kalmikov, Alexander G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)
      Wind waves in the ocean are a product of complex interaction of turbulent air flow with gravity driven water surface. The coupling is strong and the waves are non-stationary, irregular and highly nonlinear, which restricts ...
    • Modelling bottom stress in depth-averaged flows 

      Jenter, Harry L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-05)
      The relationship between depth-averaged velocity and bottom stress for wind-driven flow in unstratified coastal waters is examined here. The adequacy of traditional linear and quadratic drag laws is addressed by comparison ...
    • The modern and glacial thermoclines along the Bahama Banks 

      Slowey, Niall C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-09)
      As a primary feature of ocean circulation and a key component of the global carbon cycle, changes in the thermocline must be accounted for if we are to understand the processes involved in Quaternary climatic fluctuation. ...
    • Modern sedimentation in the Northern Barents Sea : input, dipersal and deposition of suspended sediments from glacial meltwater 

      Pfirman, Stephanie L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1984-08)
      The modern depositional environment of the northern epicontinental Barents Sea varies from proximal to distal glaciomarine. The regional surface sediment distribution is controlled by erosion of shallow banks of the ...
    • Molecular and isotopic records of combustion inputs to the environment over the last 250 years 

      Lima, Ana Lucia Cessel de (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2004-06)
      The most ubiquitous source of polycyclic aromatic hydrocarbons (PAHs) to the environment is incomplete combustion. This study generated a high-resolution historical record of pyrogenic PAH emissions since pre-industrial ...
    • A molecular approach to questions in the phylogeny of planktonic sarcodines 

      Amaral-Zettler, Linda A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-09)
      The Acantharea and the Polycystinea are two classes of sarcodines (Sarcodina) which are exclusively planktonic and occur strictly in oligotrophic marine environments. Although these protists have been the topic of research ...
    • Molecular biogeochemistry of modern and ancient marine microbes 

      Waldbauer, Jacob R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)
      Biological activity has shaped the surface of the earth in numerous ways, but life’s most pervasive and persistent global impact has been the secular oxidation of the surface environment. Through primary production – the ...
    • Molecular determination of marine iron ligands by mass spectrometry 

      Boiteau, Rene M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-02)
      Marine microbes produce a wide variety of metal binding organic ligands that regulate the solubility and availability of biologically important metals such as iron, copper, cobalt, and zinc. In marine environments where ...
    • Molecular insights into the niche of harmful brown tides 

      Wurch, Louie L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-09)
      Recurrent brown tide blooms caused by the harmful alga Aureococcus anophagefferens have decimated coastal ecosystems and shellfisheries along the Eastern U.S. and South Africa. The exact mechanisms controlling bloom ...
    • Molecular phylogenetics of the Metazoan clade Lophotrochozoa 

      Passamaneck, Yale J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-09)
      DNA sequencing and phylogenetic analyses were conducted to investigate evolutionary relationships between taxa within the metazoan clade Lophotrochozoa. Chapter 1 presents an introduction to phylogenetics of the Metazoa ...
    • Molecular regulation of the induction of cytochrome P-450E in the estuarine fish Fundulus heteroclitus 

      Kloepper-Sams, Pamela J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-12)
      Induction of the aryl hydrocarbon hydroxylase (AHH) P450IA1 occurs in many organisms following exposure to polycyclic aromatic hydrocarbons (PAH). Regulation of induction of P450IA 1 (called P-450E) was examined in the ...