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Filtering by: Creator Perkins, Matt J. Remove constraint Creator: Perkins, Matt J. Degree Field Oceanography Remove constraint Degree Field: Oceanography Resource Type Dissertation Remove constraint Resource Type: Dissertation

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  • Relationships of in situ spectral absorption, pigment ratios and environmental parameters for phytoplankton assemblages in coastal waters

    Creator:
    Eisner, Lisa B.
    Abstract:
    In situ optical measurements of spectral absorption and beam attenuation provide information on the fine scale horizontal and vertical variations in phytoplankton pigments and other measures of phytoplankton photophysiology and ecology in coastal waters. Phytoplankton pigment ratios from discrete sample analyses with High Performance Liquid Chromatography were compared to in...
    Resource Type:
    Dissertation
    Full Text:
    : Timothy J. Cowles In situ optical measurements of spectral absorption and beam attenuation provide

  • Interactions of wind-driven and tidally-driven circulation in the Oregon coastal ocean

    Creator:
    Osborne, John J.
    Abstract:
    Influences of tidal and slower (subtidal) oceanic flows over the continental shelf and slope off Oregon are studied using a high-resolution ocean circulation model and comparative model-data analyses. The model is based on the Regional Ocean Modeling System (ROMS), a fully nonlinear, three-dimensional model (using hydrostatic and Boussinesq approximations). The...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF John J. Osborne V

  • Prokaryotes associated with marine crust

    Creator:
    Mason, Olivia Underwood
    Abstract:
    Oceanic crust covers nearly 70% of the Earth's surface, of which, the upper, sediment layer is estimated to harbor substantial microbial biomass. Marine crust; however, extends several kilometers beyond this surficial layer, and includes the basalt and gabbro layers. In particular, the basalt layer has high permeabilities which allows for...
    Resource Type:
    Dissertation
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    : _______________________________________________ Stephen J. Giovannoni Martin R. Fisk Oceanic crust covers nearly 70% of the

  • Satellite observations of the influence of mesoscale ocean eddies on near-surface temperature, phytoplankton and surface stress

    Creator:
    Gaube, Peter
    Abstract:
    The influence of mesoscale ocean eddies on near-surface ocean temperature, surface stress and phytoplankton communities is investigated by collocating numerous satellite measurements along with vertical profiles of oceanic temperature and salinity to the interiors of eddies identified and tracked in altimetric sea surface height maps. The surface currents associated with...
    Resource Type:
    Dissertation
    Full Text:
    you. Matt, thank you for keeping me honest, teaching me Man Skills while providing an outlet for

  • Chromium-51 in the Columbia River and adjacent Pacific Ocean

    Creator:
    Cutshall, N. H.
    Abstract:
    Radioactive chromium-51, a waste byproduct from operation of nuclear reactors at Hanford, Washington, has been followed down the Columbia River and into the Pacific Ocean. Chemical factors influencing the partitioning of ⁵¹Cr between solution and sediment have been considered. Chromium-5l, in a hexavalent oxyanion when introduced into the Columbia River,...
    Resource Type:
    Dissertation
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    are discussed by Crouthamel (1960), Heath (1964), Baird-Atomic Incorpo- rated (1960) and by Perkins

  • Dispersion of the Columbia River plume based on radioactivity measurements

    Creator:
    Frederick, Lawrence Churchill
    Abstract:
    An investigation has been made of several physical parameters of the effluent plume of the Columbia River as it enters the Pacific Ocean. Radioactive material in trace amounts enters the Columbia River from the Hanford nuclear reactors at Richland, Washington. One of these nuclides, chromium -51, has been used to...
    Resource Type:
    Dissertation
    Full Text:
    detected at the mouth of the Columbia River (Perkins, Nelson and Haushild, 1966). Of these, two gamma emit

  • Radioecology of ⁶⁵Zn in an arm of the Columbia River Estuary

    Creator:
    Renfro, William Charles
    Abstract:
    Levels of ⁶⁵Zn in water, sediments, plants, and animals in Alder Slough, a small ecosystem in the Columbia River Estuary, were determined periodically during a one year period. Concentrations of total Zn in organisms were also measured to permit computation of specific activities (μCi⁶⁵Zn/g total Zn). Temporal fluctuations in the...
    Resource Type:
    Dissertation
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    amounts of fission products and activation products to the cooling water (Nelson, 1962). Perkins, Nelson

  • Water tracing with soluble metal chelates and neutron activation analysis : a laboratory and field study

    Creator:
    Hanson, Peter James
    Abstract:
    Research on the application of soluble, metal chelates for water tracing using thermal neutron activation analysis for tracer determination has led to the development of several tracers with promising solution stabilities (conservative behavior) and determination sensitivities. The solution stabilities of the ethylenediamine tetraacetic acid (EDTA) and the diethylenetriamine pentaacetic acid...
    Resource Type:
    Dissertation
    Full Text:
    , 5,9, 12 106 Ru solution 106j ( Ru) d g, i 3 125 Sb SbEDTA a, b, d 1, n 12 131 I NH4I, KI b, d g, j

  • Decline of radioactivity in the Columbia River and estuary : rates and mechanisms

    Creator:
    Johnson, Vernon Gene
    Resource Type:
    Dissertation
    Full Text:
    PLUTONIC RCCKS -=-:-' -' PLEISTOCENE - .. I'. . -- GLACIAL Qk\f::_) - I -. / LIL;-j (,. OREGON T

  • Techniques of solvent extraction of organic material from natural waters

    Creator:
    Cronin, John Thomas, 1935-
    Abstract:
    Manual and automatic solvent extraction techniques were used to concentrate organic material from natural waters. Field and laboratory extractions were compared to determine the most probable method and best solvents for efficient concentration of organic material from estuarine and sea waters. The large scale extraction processes utilizing extractors made from...
    Resource Type:
    Dissertation
    Full Text:
    . D. (Name of student) (Degree) in Oceanography presented on \'J\c'j \ (Major) (Date) Title