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ScholarsArchive at Oregon State University
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Assessments of climate change over time scales that exceed the last 100 years require robust integration of high-quality instrument records with high-resolution paleoclimate proxy data. In this study, we show that the recent biogenic sediments...
2013-07-17 (iso8601)
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Given image data of a fluid flow, the flow field, < u, v >, governing the evolution of the system can be estimated using a variational approach to optical flow. Assuming that the flow field governing the advection is the symplectic gradient of a...
2013-09-11 (iso8601)
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Coastal flood hazard zones and the design of coastal defenses are often devised using either the maximum recorded total water level (TWL) or a 'design' event such as the 100-year return-level flood, usually projected from observed extreme events....
2013-10-16 (iso8601)
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The biogeochemical processes that occur in marine sediments on continental
margins are complex; however, from one perspective they can be considered with respect
to three geochemical zones based on the presence and form of methane:...
2013-11 (iso8601)
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Changing environmental conditions in the North Pacific are altering the lipid/fatty acid
(FA) composition of zooplankton assemblages, but the consequences to resident fish larvae are
unknown. In the laboratory, we reared Pacific cod Gadus...
2010-08-18 (iso8601)
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The albedo of Arctic sea ice depends greatly on the formation of melt ponds. These ponds form in depressions on the ice as surface snow melts during the summer months, and their location is determined mainly by the initial snow topography. Using a...
2013-10-23 (iso8601)
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The impact of assimilation of wave-averaged flow velocities on the bathymetric correction is studied in tests with synthetic (model-generated) data using tangent-linear and adjoint components of a one-way coupled nearshore wave-circulation model....
2013-09-20 (iso8601)
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Based on a literature overview, this paper summarizes the impact and legacy of the contributions of Wilfried Brutsaert and Jean-Yves Parlange (Cornell University) with respect to the current state-of-the-art understanding in hydraulic groundwater...
2013-09-04 (iso8601)
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The atmospheric low-level coastal jet (LLCJ) in the Southeast Pacific (SEP) region is characterized as either a strong-forcing jet (colder and drier air) or weak-forcing jet (warm and moist) based on the location of the Southeast Pacific...
2013-09-03 (iso8601)
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We provide an efficient method to estimate processing rates through simple algebraic relationships derived from the transient storage model equations. The method is based on the transport equations, but eliminates the need to calibrate highly...
2013-09-04 (iso8601)
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As part of the International Polar Year research program, we conducted a survey of surface marine sediments from box cores along a section extending from the Bering Sea to Davis Strait via the Canadian Archipelago. We used bulk elemental and...
2013-09-05 (iso8601)
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See article for abstract.
2013-09-09 (iso8601)
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Cold seep communities with distinctive chemoautotrophic fauna occur where hydrocarbon-rich fluids escape from the seabed. We describe community composition, population densities, spatial extent, and within-region variability of epifaunal...
2013-10-18 (iso8601)
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Relationships among the horizontal pressure gradient, the Coriolis force, and the vertical momentum transport by turbulent fluxes are investigated using data collected from the 1999 Cooperative Atmosphere-Surface Exchange Study (CASES-99). Wind...
2013-11 (iso8601)
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The significance of the various carbon cycling pathways in driving the sharp sulfate methane transition
(SMTZ) observed at many locations on continental margins is still a topic of debate. Unraveling these
processes is important to our...
2013-10 (iso8601)
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A meaningful application of Mo as a paleo-redox proxy requires an understanding of Mo cycling in
modern reducing environments. Stagnant euxinic basins such as the Black Sea are generally regarded as
model systems for understanding euxinic systems...
2013-09 (iso8601)
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Passive hydrophone technologies and a variety of acoustic methods are applied in
the deep-ocean and shallow water coastal environments of the northeast Pacific. A
catalog derived from U.S. Navy regional hydrophone array recordings of...
2013-11-20 (iso8601)
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Nearshore and estuarine environments along the U.S West Coast are ocean acidification (OA) "hotspots". Carbon dioxide-enriched water has been correlated with production losses of Pacific oyster (Crassostrea gigas) larvae at hatcheries in the...
2013-10-18 (iso8601)
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Ocean acidification (OA) has emerged as an important focus of research and policy in this decade. Ocean acidification specifically refers to changes in the inorganic carbon system in the ocean resulting from its absorption of human-released CO₂...
2013-11-12 (iso8601)
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Larvae of the Pacific Oyster, Crassostrea gigas, at Whiskey Creek Shellfish Hatchery (WCH) in Netarts Bay, Oregon, are negatively impacted by high-CO₂ water and exposure during the initial shell formation period appears to be particularly...
2013-10-28 (iso8601)
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The subsurface microbial biosphere in the igneous oceanic crust has implications for global geochemical cycling, early life on Earth, and the search for life on Mars. Microscopic evidence of a subsurface microbial ecosystem includes biotic...
2013-12-03 (iso8601)
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Semi-volatile trace metals like Li, Cu, Mo, Sn, In, and Pb have the potential to track mobility of a volatile phase in volcanic systems. In this dissertation four studies are presented that either directly investigate or are motivated by...
2013-12-16 (iso8601)
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Seagrass ecosystems are considered some of the most productive coastal habitats in the world. One such seagrass within estuaries of the Pacific Northwest, Zostera marina (eelgrass), is recognized to be an ecosystem engineering species that...
2013-12-19 (iso8601)
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Branched glycerol dialkyl glycerol tetraethers (brGDGTs) of purportedly terrestrial
origin are frequently detected in marine sediments, even in remote ocean sites where no
direct impact from land erosion via rivers takes place. At these places,...
2013-11 (iso8601)
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