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  • Tide-topography coupling on a continental slope

    Creator:
    Kelly, Samuel M.
    Abstract:
    Tide-topography coupling is important for understanding surface-tide energy loss, the intermittency of internal tides, and the cascade of internal-tide energy from large to small scales. Although tide-topography coupling has been observed and modeled for 50 years, the identification of surface and internal tides over arbitrary topography has not been standardized....
    Resource Type:
    Dissertation
    Full Text:
    Coupling on a Continental Slope Abstract approved: Jonathan D. Nash Tide-topography coupling is

  • Engineering a Profiling System for a Robotic Oceanographic Surface Sampler

    Creator:
    Shannon, Robert J.
    Abstract:
    ROSS (Robotic Oceanographic Surface Sampler) is an autonomous boat, equipped with oceanographic sensors, used for studying the ocean’s surface. One of its advantages over traditional research vessels is its ability to sample near glaciers, an area too dangerous for manned ships. In order to properly ascertain deep ocean heat’s effect...
    Resource Type:
    Honors College Thesis
    Full Text:
    :_____________________________________________________ Jonathan Nash ROSS (Robotic Oceanographic Surface Sampler) is an autonomous boat

  • Dynamics of the Columbia River tidal plume

    Creator:
    Kilcher, Levi F.
    Abstract:
    This dissertation investigates the dynamics of the tidally modulated outflow from the Columbia River mouth using high resolution measurements of velocity, density and turbulent microstructure. At high tide, flow through the river mouth reverses from flood (onshore) to ebb (offshore). During ebb, buoyant fluid issues from the river mouth and...
    Resource Type:
    Dissertation
    Full Text:
    the Columbia River tidal plume Abstract approved: Jonathan D. Nash This dissertation investigates

  • Quantification of advection and dispersion in lateral subsurface flowpaths at the hillslope-scale

    Creator:
    Victory, Nichole I.
    Abstract:
    It is becoming increasingly important to understand fundamental hillslope-scale hydrological processes. Most hillslope-sale transport experiments have generally focused on conceptual findings or other aspect of flow behavior, rather than the quantification of the mass transport mechanisms of advection and dispersion. When the velocities have been quantified, dispersion has been mentioned...
    Resource Type:
    Masters Thesis
    Full Text:
    : __________________________________________ Jonathan D. Istok It is becoming increasingly important to understand fundamental hillslope

  • Estimating the in situ Stratification via Remotely-sensed Internal Wave Speeds

    Creator:
    Fang, Chufan
    Abstract:
    This work investigates a methodology for estimating the ocean stratification gradient based on high-resolution, in space and time, remote sensing observations of internal wave propagation speeds. The internal wave speed observations were collected using a shore-based, X-band marine radar and the ocean vertical density profiles were collected simultaneously from an...
    Resource Type:
    Masters Thesis
    Full Text:
    Wengrove, Dr. James Lerczak and Dr. Jonathan Nash. I have been working in the research group for more than

  • Observations of cross-shore sediment transport and formulation of the undertow

    Creator:
    Guannel, Gregory E.
    Abstract:
    A new set of data from a large-scale sand bar migration experiment is presented. During this experiment, two sandbars were generated. One of the bar was generated by the action of undertow, and sediment moved offshore. The other bar was generated by the shoreward movement of sediment coming from the...
    Resource Type:
    Dissertation
    Full Text:
    . Finally, I would like to thank Dr. Jonathan Nash for showing me the beauty of u∂xu. I would also like to

  • Tidal-band and high-frequency internal variability on the central Oregon inner shelf

    Creator:
    Suanda, Sutara H.
    Abstract:
    Analogous to ocean surface waves, waves in the ocean interior also experience steepening, breaking, and dissipation as they approach the coastline. Much less is known about this internal beach. In this work, extensive moored Acoustic Doppler Current Profiler and temperature/salinity data together with optical remote sensing are combined to describe...
    Resource Type:
    Dissertation
    Full Text:
    you to my committee members over the years, Jonathan Nash, Jim Lerczak, Murray Levine, Ed Dever, and

  • Semidiurnal Atmospheric Tide Driven Superinertial Oscillation on the Texas-Louisiana Shelf

    Creator:
    Hsu, Fucent Hsuan Wei
    Abstract:
    Basin-scale superinertial oceanic tides have been observed globally to resonate with the continental shelf (e.g., the Patagonian Shelf) with a clear theoretical framework. However, the response of the shelf to atmospheric tides – another basin-scale forcing – has not been discussed. This study explores this response using a prominent S2...
    Resource Type:
    Masters Thesis
    Full Text:
    , Jonathan Nash, William Smyth, Leif Thomas, Elaine Cozzi), and the support from the National Science

  • Wind-current Interactions of the Sri Lanka Dome and Tropical Indian Ocean

    Creator:
    Cullen, Kerstin
    Abstract:
    The southwest monsoon, which may be idealized as the northward movement of the intertropical convergence zone in the Indian Ocean associated with differential heating of land and ocean, brings a seasonal reversal of currents and winds in the Bay of Bengal and the Arabian Sea. Atmospheric convection from monsoon activity...
    Resource Type:
    Dissertation
    Full Text:
    encourage and support my research. I appreciate the help Jonathan Nash gave me when I first arrived at grad

  • Heterojunction Assisted Impact Ionization at the ZnS/Si Interface and Cu_10Te_4S_13 Photodiodes

    Creator:
    Reidy, Christopher F.
    Abstract:
    Several topics are presented in this dissertation, each of which has applications to solar cells and photodetectors. First, we discuss the growth of Cu10Te4S13, copper tellurium tetrahedrite. This material has interesting optical properties; it has a large joint density of states at the conduction band maximum and valence band minimum,...
    Resource Type:
    Dissertation