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Filtering by: Creator Smyth, Jeffrey D. Remove constraint Creator: Smyth, Jeffrey D. Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Multivariate geostatistical analysis of groundwater contamination by pesticide and nitrate

    Creator:
    Smyth, Jeffrey D.
    Abstract:
    A field study was conducted to determine the applicability of multivariate geostatistical methods to the problem of estimating and simulating pesticide concentrations in groundwater from measured concentrations of nitrate and pesticide, when pesticide is undersampled. Prior to this study, no published attempt had been made to apply multivariate geostatistics to...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Jeffrey D. Smyth for the degree of

  • Turbulence in sheared, salt-fingering favorable environment

    Creator:
    Kimura, Satoshi
    Abstract:
    Instability and turbulence in sheared, salt-fingering favorable stratification are studied using three-dimensional direct numerical simulations (DNS). Salt-fingering favorable stratification is gravitationally stable, because the unstable vertical gradient of salinity is stabilized by temperature (warm, salty over cool, fresh water-masses). Salt-fingering instability can occur at the interface of these different water-masses....
    Resource Type:
    Dissertation
    Full Text:
    : Turbulence in Sheared, Salt-fingering Favorable Environment Abstract approved: William D. Smyth

  • Turbulence and biophysical fluxes in the near surface ocean

    Creator:
    Hoecker-Martínez, Martín
    Abstract:
    Vertical transports of plankton, momentum, heat, and turbulence are modeled. A novel integration of high resolution turbulence and biophysical modeling is used to show the influence of a Kelvin-Helmholtz instability on the vertical migration of simple gyrotactic organisms. A viscous limit on mixing driven by shear turbulence is proposed. Large...
    Resource Type:
    Dissertation
    Full Text:
    biophysical fluxes in the near surface ocean. Abstract Approved: William D. Smyth Vertical transports of

  • Mathematical approaches to the physics of mesoscale oceanography

    Creator:
    Early, Jeffrey J.
    Abstract:
    The long-term evolution of Gaussian eddies is studied in an equivalent barotropic model using both linear and nonlinear quasi-geostrophic theory in an attempt to understand westward propagating satellite altimetry tracked mesoscale eddies. By examining both individual eddies and a large basin seeded with eddies, it is shown that long term...
    Resource Type:
    Dissertation
    Full Text:
    1 AN ABSTRACT OF THE DISSERTATION OF Jeffrey J. Early for the

  • Shear and convective turbulence in a model of thermohaline intrusions

    Creator:
    Mueller, Rachael
    Abstract:
    Thermohaline interleaving is an important mechanism for laterally fluxing salt, heat, and nutrients between oceanic water masses. Interleaving is driven by a release of potential energy resulting from the vastly differing diffusivities of heat and salt in seawater. The flows are composed of stacked intrusions that flux more buoyant and...
    Resource Type:
    Masters Thesis
    Full Text:
    Turbulence in a Model of Thermohaline Intrusions Abstract approved: William D. Smyth Thermohaline

  • Linear theory of roll instabilities in the ocean surface layer

    Creator:
    Duncombe, Jenessa R.
    Abstract:
    This thesis describes the results of a linear stability analysis conducted on a simulated wind-forced ocean front. The ocean surface boundary layer regulates exchanges between the ocean and atmosphere, and the presence of turbulence in the surface layer can greatly impact climate and ocean life. Past research has shown that...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Roger M. Samelson Eric D. Skyllingstad ABSTRACT This thesis describes the results

  • Nonlinear internal waves on the continental shelf

    Creator:
    Shroyer, Emily L.
    Abstract:
    The properties and evolution of nonlinear internal waves (NLIWs) depend upon the background conditions within which waves form, propagate, and dissipate. As a result, the NLIW field on the New Jersey shelf displayed dramatic variability during the Shallow Water 2006 experiment. Wave variability was exhibited by 1) amplitudes that ranged...
    Resource Type:
    Dissertation
    Full Text:
    Smyth, and William Hetherington. I feel very fortunate to have worked with such ex- ceptional

  • Candidate Genes Associated with Blister Rust Resistance in Whitebark Pine (Pinus albicaulis) Revealed through de novo Transcriptome Assembly and Differential Gene Expression Analysis

    Creator:
    Bair, Zolton J.
    Abstract:
    Whitebark pine (Pinus albicaulis) is an iconic North American high-elevation tree species currently threatened by climate change, mountain pine beetle, and white pine blister rust (WPBR), a lethal disease caused by the non-native fungal pathogen Cronartium ribicola. In collaboration with the USDA Forest Service Dorena Genetic Resource Center, germplasm was...
    Resource Type:
    Dissertation
    Full Text:
    : ____________________________________________________ Jeffrey K. Stone Whitebark pine (Pinus albicaulis) is an iconic North American high

  • Characterization of the transition to the progamic phase in Zea mays pollen

    Creator:
    Smyth, Johanna C.
    Abstract:
    The transition of mature pollen to the progamic phase represents an important step in the regulation of plant sexual reproduction. The progamic phase encompasses the initiation of pollen tube germination, growth of the pollen tube through the stigma (the silk in maize) and concludes with fertilization of the female gametophyte....
    Resource Type:
    Dissertation
    Full Text:
    Johanna C. Smyth for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

  • An investigation of the synthesis of homogentisic acid

    Creator:
    Smyth, James Simpson
    Resource Type:
    Masters Thesis
    Full Text:
    water was decanted and renewed several tes and the last volume allowed to cool d stand f or s everal