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Filtering by: Creator Miller, Heather M. Remove constraint Creator: Miller, Heather M. Degree Field Oceanography Remove constraint Degree Field: Oceanography Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • Modern and past climate variability in the eastern Pacific warm pool

    Creator:
    Benway, Heather M.
    Abstract:
    Westward transport of water vapor across the Panama Isthmus helps to maintain the salinity contrast between the Atlantic and Pacific Oceans, important in thermohaline circulation and global climate. Relatively low sea-surface salinities and a strong, shallow pycnocline in the eastern Pacific warm pool (EPWP) region near Central America reflect high...
    Resource Type:
    Dissertation
    Full Text:
    Heather M. Ben\YilY for the degree of Doctor of PhilQfilw_hy in OceanogrJIDhY presented on July 21, 2005

  • Numerical and assimilative studies of the equatorial Pacific cold tongue

    Creator:
    Perez, Renellys Christine
    Abstract:
    Numerical model and assimilation experiments were conducted in the tropical Pacific Ocean to obtain a better understanding of the processes that control the cold tongue surface mixed layer temperature balance during August 1999 to July 2004. The numerical model was first applied to test two hypotheses (asymmetric background currents and...
    Resource Type:
    Dissertation
    Full Text:
    Assimilative Studies of the Equatorial Pacific Cold Tongue. Abstract approved: '' / Robert N. Miller

  • Modeling studies of ocean circulation using inverse methods and bifurcation theory

    Creator:
    Vernieres, Guillaume
    Abstract:
    We present a study of the ocean circulation using state of the art numerical and data assimilation techniques. The second chapter of the thesis presents the development and application of generalized inversion to a simple dynamical model of Lake Kinneret. The intent was to develop the necessary tools to implement...
    Resource Type:
    Dissertation
    Full Text:
    Ocean Circulation Using Inverse Methods and Bifurcation Theory Abstract approved Robert N. Miller We

  • Distribution and abundance of coastal fish and macro-invertebrates in the Galapagos Islands

    Creator:
    Figueroa, Diego
    Abstract:
    The Galapagos Islands, located off the coast of Ecuador, have a spatially diverse marine environment suitable for a variety of species with different climatic requirements. A year-long inventory program was carried out in 2000-2001 to provide baseline data on the abundances and distribution of coastal fish and macro-invertebrates. The purposes...
    Resource Type:
    Masters Thesis
    Full Text:
    Coastal Fish and Macro-Invertebrates in the Galapagos Islands Abstract approved: Charles B. Miller The

  • Quantifying linear disturbance growth in periodic and aperiodic systems

    Creator:
    Wolfe, Christopher Lee
    Abstract:
    The mathematical and physical connections between three different ways of quantifying linear predictability in geophysical fluid systems are studied in a series of analytical and numerical models. Normal modes, as they are traditionally formulated in the instabilities theories of geophysical fluid dynamics, characterize the asymptotic development of disturbances to stationary...
    Resource Type:
    Dissertation
    Full Text:
    Disturbance Growth in Periodic and Aperiodic Systems Abstract approved: Roger M. Samelson The mathematical

  • Zooplankton of the Galapagos Islands

    Creator:
    Figueroa, Diego
    Abstract:
    The marine climate of the Galapagos is spatially and seasonally heterogeneous. A taxonomically comprehensive study of Galapagos zooplankton has never been done. This study is an initial effort to establish the distribution and community structure of zooplankton in the Archipelago. I collected zooplankton samples by vertical tows over the Galapagos...
    Resource Type:
    Dissertation
    Full Text:
    : Charles B. Miller Harold P. Batchelder The marine climate of the Galapagos is spatially and

  • Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

    Creator:
    Gutierrez, Jaime Gomez
    Abstract:
    I compare the seasonal abundance variation, population dynamics, fecundity, egg hatching mechanism and success, and apostome ciliate parasites of the euphausiids Euphausia pac?fica and Thysanoessa spinfera from the Oregon coast, USA. Community structure and nearshore distributions were examined from bi-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change...
    Resource Type:
    Dissertation
    Full Text:
    people who have helping me along the way. I want to thank my major advisors, Charles B. Miller and

  • A seasonal study of sediment reworking by Neotrypaea californiensis in Yaquina Bay, Oregon

    Creator:
    Fritz, Cara E.
    Abstract:
    A year-long field study was undertaken to investigate the influence of a number of physical and biological factors, specifically temperature, organic carbon content, and shrimp population dynamics on sediment reworking rates by the ghost shrimp Neotrypaea calforniensis. Because of its role as a structuring agent in estuaries along the West...
    Resource Type:
    Masters Thesis
    Full Text:
    . Rates of reworking normalized to shrimp biomass/m 2 varied over the year, with lows in the winter

  • Modeling Transport, Retention, and Growth of Early Life Stages of Small Pelagic Fishes in the Southern Humboldt System

    Creator:
    Gomez, Fabian A.
    Abstract:
    Small pelagic fishes (SPF), such as anchovies and sardines, are ecologically important due to their large abundance and intermediate trophic position that links plankton production to upper trophic levels. They are also economically important, supporting large fisheries that contribute to one fourth of the world fish landings. Reproductive success in...
    Resource Type:
    Dissertation
    Full Text:
    patterns strongly determine individual growth and survival. Passive individuals initialized at 5 m depth

  • Vertical distribution patterns of plankton and their relationship to physical factors over the continental shelf off Oregon

    Creator:
    Sutor, Malinda
    Abstract:
    Discrete layers of phytoplankton and zooplankton were observed over the Oregon continental shelf in summer and fall of 2001 and summer 2002 using optical and acoustical technologies and a pump sampling system. Layers of phytoplankton had steep vertical gradients which were associated with gradients in density and local peaks in...
    Resource Type:
    Dissertation
    Full Text:
    Charlie Miller and Bill Peterson have been dedicated editors and have been important scientific mentors