Now showing items 352-371 of 868

    • Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the northwestern Atlantic 

      Pangallo, Kristin C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-09)
      Halogenated 1’-methyl-1,2’-bipyrroles (MBPs) are a distinctive class of marine organic compounds. They are naturally produced, they have a unique carbon structure, they are highly halogenated, and they bioaccumulate in ...
    • Heat flow and tectonics of the Ligurian Sea basin and margins 

      Jemsek, John P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-05)
      Heat flow, tectonic subsidence and crustal thickness distributions in the Ligurian Basin are best explained by asymmetric lithospheric thinning mechanisms. Over 150 heat flow measurements are made on several transects ...
    • Heat loss and hydrothermal circulation due to sea-floor spreading 

      Williams, David Lee (Woods Hole Oceanographic Institution, 1974-07)
      Lithospheric cooling along the Galapagos Spreading Center at 86°W longitude, as determined by surface heat-flow measurements, appears dominated by hydrothermal circulation. This same phenomena apparently exists on the ...
    • Helium and lead isotope geochemistry of oceanic volcanic rocks from the East Pacific and South Atlantic 

      Graham, David W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-09)
      The isotopic evolution of helium and lead in the Earth is coupled by virtue of their common radioactive parents uranium and thorium. The isotopic signatures in oceanic volcanic rocks provide constraints on the temporal ...
    • Helium isotope geochemistry of oceanic volcanic rocks : implications for mantle heterogeneity and degassing 

      Kurz, Mark D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-06)
      The concentrations and isotopic compositions of helium have been measured in a number of mantle derived oceanic basalts. The goal of this research is to use the helium isotopic systematics to constrain the nature and ...
    • Heterogeneous reservoirs in the marine carbon cycle 

      Follett, Christopher L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-06)
      Understanding the fate of primary production in the ocean is a challenging task because once produced, organic material is oxidized over timescales which range from minutes, to millions of years. This timescale diversity ...
    • High molecular weight (HMW) dissolved organic matter (DOM) in seawater : chemical structure, sources and cycling 

      Aluwihare, Lihini I. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-04)
      The goal of this thesis was to use high resolution analytical techniques coupled with molecular level analyses to chemically characterize high molecular weight (> 1 k Da (HMW)) dissolved organic matter (DOM) isolated ...
    • The history of plutonium and cesium-137 contamination of the Ob River delta sediments 

      Panteleyev, George P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-05)
      Much of the nuclear activity of the former Soviet Union took place within or adjacent to the confines of the Ob River drainage basin. These activities include weapons production and reprocessing at Chelyabinsk-65 (also ...
    • The history of sedimentation and abyssal circulation on the Greater Antilles outer ridge 

      Tucholke, Brian E. (Woods Hole Oceanographic Institution, 1974-01)
      The Greater Antilles Outer Ridge is an 1800 km long, submarine sedimentary ridge which lies below 5000 m in the southwestern North Atlantic Ocean. Seismic reflection profiles and core data indicate that the ridge is ...
    • Horizontal and vertical structure of velocity, potential vorticity and energy in the Gulf Stream 

      Hall, Melinda M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1985-02)
      From October, 1982 to October, 1983 a current meter mooring reaching from the bottom into the thermocline was deployed for the first time in the Gulf Stream at 68°W. The temperatures, pressures, and velocities at the ...
    • Horizontal directional spectrum estimation of the Heard Island transmissions 

      Traykovski, Peter A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-01)
      In 1991 the Heard Island Feasibility Test demonstrated that it is possible to transmit coded acoustic signals nearly half way around the world. One of the key issues in the feasibility test was to determine the spatial ...
    • Human factors engineering in sonar visual displays 

      Galvin, Lawrence F. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-08)
      Undersea technology is on the verge of equipping remotely operated vehicle (ROV) pilots with a three-dimensional (3-D), real-time display incorporating data from a wide variety of sensors including sonar (sound navigation ...
    • Hybrid state estimators for the control of remotely operated underwater vehicles 

      Vaughn, Gregory M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-08)
      This paper explores the use of 'hybrid' state estimators to increase the accuracy and flexibility of acoustic position measurement systems used in the control of underwater vehicles. Two different approaches to extend ...
    • Hydraulics and instabilities of quasi-geostrophic zonal flows 

      Ralph, Elise A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-09)
      The thesis addresses the applicability of traditional hydraulic theory to an unstable, mid-latitude jet where the only wave present is the Rossby wave modified by shear. While others (Armi 1989, Pratt 1989, Haynes et ...
    • Hydrodynamic and morphodynamic responses to surfzone seafloor perturbations 

      Moulton, Melissa (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-06)
      Holes and channels were excavated in the surf zone on an ocean beach near Duck, NC, and observations of the subsequent evolution of waves, currents, and the modified seafloor were used to investigate nearshore dynamics. ...
    • Hydrodynamic controls on multiple tidal inlet persistence 

      Salles, Paulo (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-02)
      The importance of the persistence of multiple inlets in coastal systems is fundamental for issues such as water quality, navigability, and beach/barrier stability. In long embayments, having extended residence times, the ...
    • Hydrodynamic modeling of towed buoyant submarine antenna's in multidirectional seas 

      Geiger, Sam R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-09)
      A finite difference computer model is developed to simulate the exposure statistics of a radio frequency buoyant antenna as it is towed in a three-dimensional random seaway. The model allows the user to prescribe antenna ...
    • Hydrodynamics and morphodynamics of shallow tidal channels and intertidal flats 

      Friedrichs, Carl T. (Woods Hole Oceanographic Institution, 1993-02)
      In this thesis, mechanisms which control morphodynamics of shallow tidal embayments are investigated analytically. In the process of exploring these mechanisms (specifically asymmetries in bottom stress, τ), basis momentum ...
    • Hydrodynamics of a multiple tidal inlet system : Katama Bay, Martha’s Vineyard, MA 

      Orescanin, Mara M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-09)
      Observations, theoretical models, and a numerical model (ADCIRC) are used to investigate the effects of tides, waves, bay bathymetry, and changing inlet geometry on the hydrodynamics of the multiple-inlet Katama system, ...
    • Hydrographic structure of overflow water passing through the Denmark Strait 

      Mastropole, Dana M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-09)
      Denmark Strait Overflow Water (DSOW) constitutes the densest portion of North Atlantic Deep Water, which feeds the lower limb of the Atlantic Meridional Overturning Circulation (AMOC). As such, it is critical to understand ...