Now showing items 344-363 of 845

  • 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 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 ...
  • Hydrological and biogeochemical cycling along the Greenland ice sheet margin 

    Bhatia, Maya P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-02)
    Global warming has led to a significant increase in Greenland ice sheet (GrIS) melt and runoff since 1990, resulting in escalated export of fresh water and associated sediment to the surrounding North Atlantic and Arctic ...
  • The hydrothermal alteration of oceanic basalts by seawater 

    Humphris, Susan E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1976-10)
    Considerable geological and geophysical evidence now exists to support the hypothesis that seawater circulates through freshly intruded basalt at the mid-ocean ridges. As a consequence of this process, reactions between ...
  • Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents 

    Dansereau, Veronique (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)
    Interactions between the ocean circulation in sub-ice shelf cavities and the overlying ice shelf have received considerable attention in the context of observed changes in flow speeds of marine ice sheets around Antarctica. ...