Browsing Oceanography by Subject "Theses--Oceanography"
Now showing items 1-20 of 25
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Bacterial activity and community structure in the Columbia River estuarine turbidity maxima
(1999)The food web of the Columbia River estuary is centered in estuarine turbidity maxima (ETM) where allochthanous particulate organic material (POM), particle-attached bacteria, and consumers such as copepods and rotifers are ... -
Digestion theory and applications to deposit feeders
(1988)A general theory of digestion can be derived from principles of chemical reactor theory, and three ideal reactor models, the batch reactor, plug-flow reactor (PFR), and continuous-flow, stirred-tank reactor (CSTR), are the ... -
Ecology, phylogeny and physiological adaptations of euryhaline and moderately halophilic bacteria from deep-sea and hydrothermal-vent environments
(2003)The gamma-proteobacterial genus Halomonas is among the most abundant groups of microorganisms in hydrothermal-vent and pelagic habitats. Characterization of six novel Halomonas strains, including four new species isolated ... -
Energy and volume flux into the deep ocean: examining diffuse hydrothermal systems
(2004)Hydrothermal circulation plays an important role in the chemistry of the world's oceans, the biology beneath and at the seafloor---as well as within the ocean itself---and also the geology of the uppermost igneous oceanic ... -
Equatorial wave-mean flow interaction: the long Rossby waves
(1988)The interaction of long equatorial Rossby waves with mean zonal currents in the ocean is investigated in a continuously stratified finite difference numerical model. The model allows for realistic specification of the mean ... -
The heat and salt balances of the upper ocean beneath a spatially variable melting sea ice cover
(2003)The aim of this study is to paint a picture of the evolution of the horizontally variable ice-ocean boundary layer throughout summer. Observations were made during the drifting Surface HEat Balance of the Arctic (SHEBA) ... -
Hydrography and flow in the axial valley of the Endeavour segment: implications for larval dispersal
(2006)The axial valley of the Endeavour Segment (Juan de Fuca Ridge) is a region of intense hydrothermal activity that supports an exotic chemosynthetic ecosystem. Previous studies of circulation in the region have mostly focused ... -
Influence of breaking waves on sediment concentration profiles and longshore sediment flux in the nearshore zone
(1997)Two experiments provided data for the investigation of the influence of wave breaking on suspended sediment concentration profiles and sediment flux in the nearshore zone. A prototype wave basin experiment provided velocity ... -
Influences of mean shear in Florida current on turbulent production by internal waves
(1998)Observations of shear finestructure and turbulence in the Florida Current are analyzed to assess whether internal wave parameterizations can predict viscous dissipation rates in a vertically sheared background. Measurements ... -
Isotopic constraints on sources and cycling of riverine dissolved inorganic carbon in the Amazon Basin
(2004)Dissolved inorganic carbon (DIC) and CO2 gas are fundamental components of riverine biogeochemical functioning. Amazonian and humid tropical rivers represent a large, neglected source of CO2 to the atmosphere. Carbon ... -
Magmatic accretion of the upper oceanic crust
(1998)The focus of this work is the temporal and spatial evolution of upper oceanic crust accreted at the southern Juan de Fuca Ridge (JdFR), an intermediate rate spreading center. The area of concentrated study is along the ... -
Measured and modeled particle export in equatorial and coastal upwelling regions
(1999)The focus of this work was to improve understanding of particle cycling and export from the surface ocean in three areas: (1) methods validation, (2) description of regional and temporal variability and (3) evaluation of ... -
The microbial fate of carbon in high-latitude seas: impact of the microbial loop on oceanic uptake of CO2
(1996)This dissertation examines pelagic microbial processes in high-latitude seas, how they affect regional and global carbon cycling, and how they might respond to hypothesized changes in climate. Critical to these interests ... -
Nearshore ice formation and sediment transport in southern Lake Michigan
(1998)The southern Lake Michigan nearshore zone is ice covered for two to four months each year. Daily observations in January 1991 document the effect of this seasonal ice on sediment transport along the Illinois shoreline of ... -
Observations and physics of amplified subinertial tidal currents in stratification and mean shear flow at a seamount
(1996)Three-dimensional structure of amplified diurnal tidal currents (subinertial, 0.69f) at Cobb Seamount (130.8$\sp\circ W,$ 46.8$\sp\circ N),$ collected by ship-mounted Acoustic Doppler Current Profiler, agrees well with a ... -
Organic carbon input, degradation, and preservation in continental margin sediments: an assessment of the role of a strong oxygen deficient zone
(1998)Rates of organic carbon input, oxidation and burial in marine sediments were studied with the goal of assessing the role of an oxygen deficient water column in the preservation of organic matter. Factors influencing these ... -
Passive acoustic detection and measurement of rainfall at sea and an empirical ocean ambient sound model
(2004)Rainfall over the ocean is one of the most important climatic parameters for both oceanic and atmospheric science. Traditional accumulation-type rain gauges are difficult to operate at sea, and so an alternate technique ... -
Phase separation in submarine hydrothermal systems: evidence from the Juan de Fuca Ridge
(1990)In order to understand processes affecting the composition of hydrothermal fluids, a detailed study was made of the chemical variability within two vent fields along the Juan de Fuca Ridge. Results indicate that phase ... -
Reconstructing the oceanic p13sSeuss effect
(1999)This dissertation consists of two components: deriving along-isopycnal advection rates in the North Pacific from chlorofluorocarbon (CFC) distributions and determining 13C/12C changes in the global ocean due to oceanic ...