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ScholarsArchive at Oregon State University
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Acidified waters are impacting commercial oyster
production in the U.S. Pacific Northwest, and favorable
carbonate chemistry conditions are predicted to become
less frequent. Within 48 h of fertilization, unshelled Pacific
oyster (Crassostrea...
2013-05-29 (iso8601)
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A new theory of shear instability in a turbulent environment is applied to eight days of velocity and density
profiles from the upper-equatorial Pacific. This period featured a regular diurnal cycle of surface forcing,
together with a clear...
2013-11 (iso8601)
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The increase in atmospheric concentrations of water vapor with global warming is a
large positive feedback in the climate system. Thus, even relatively small errors in its
magnitude can lead to large uncertainties in predicting climate response to...
2013-11-22 (iso8601)
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Numerical solutions to the nonlinear Boussinesq equation, applied to a steeply sloping
aquifer and assuming uniform hydraulic conductivity, indicate that late-time recession
discharge decreases nearly linearly in time. When recession discharge is...
2013-11-20 (iso8601)
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Given its large population, vigorous and water-intensive agricultural industry, and
important ecological resources, the western United States presents a valuable case study for
examining potential near-term changes in regional hydroclimate. Using...
2013-10-01 (iso8601)
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Sea surface temperatures (SST) and inorganic continental input over the last 25,000 years
(25 ka) are reconstructed in the far eastern equatorial Pacific (EEP) based on three cores
stretching from the equatorial front (~0.01°N, ME0005-24JC) into...
2013-11-25 (iso8601)
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Several mechanisms can drive vertical velocities in the coastal ocean, including wind-forcing
and through gradients in the vorticity field generated by flow-topography
interactions. A two-layer, steady, wind-driven, analytical model is applied to...
2013-11-13 (iso8601)
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The network comprising 61 high-frequency radar systems along the U.S. West Coast
(USWC) provides a unique, high resolution, and broad scale view of ocean surface
circulation. Subinertial alongshore surface currents show poleward propagating...
2013-12-12 (iso8601)
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Idealized numerical simulations utilizing the Regional Ocean Modeling System (ROMS) are carried out
to examine the response of buoyant river plume systems to offshore-directed wind stresses. It is found that
after a few inertial periods of wind...
2013-12 (iso8601)
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We review marine heat flow data along the Nankai Trough and show that observations
>30 km seaward of the deformation front are 20% below conductive predictions
(129–94 mW m⁻²) but consistent with the global heat flow average for oceanic crust of...
2013-06-21 (iso8601)
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Nonlinear mesoscale eddies can influence biogeochemical cycles in the upper ocean
through vertical and horizontal advection of nutrients and marine organisms. The relative
importance of these two processes depends on the polarity of an eddy...
2013-12-02 (iso8601)
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Multiple episodes of Oligocene and younger silicic volcanism are represented in the high lava plateau
of central and southeastern Oregon. From 12 Ma to Recent, volcanism is strongly bimodal with nearly
equal volumes of basalt and rhyolite. It is...
2013-08-08 (iso8601)
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A historical record of Pacific Northwest (defined here as west of the Cascade Mountains in Washington and
Oregon) heat waves is identified using the U.S. Historical Climate Network, version 2, daily data (1901–2009).
Both daytime and nighttime...
2013-07 (iso8601)
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Acoustic scattering layers of biological origin have been observed for nearly 70 years across the world’s oceans. The organisms that comprise these layers are known to be important features in most oceanic ecosystems, providing a vital trophic...
2014-03-10 (iso8601)
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The frictional resistance on a fault during slip controls earthquake dynamics.
Friction dissipates heat during an earthquake; therefore the fault temperature after an earthquake
provides insight into the level of friction. The JFAST project (IODP...
2013-12-06 (iso8601)
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The vast marine deep biosphere consists of microbial habitats within sediment, pore waters, upper basaltic crust and the fluids that circulate throughout it. A wide range of temperature, pressure, pH, and electron donor and acceptor conditions...
2013-07-11 (iso8601)
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Using a short-baseline hydrophone array, persistent volcanoacoustic sources are identified
within the ambient noise field of the Lau Basin during the period between 2009 January and
2010 April. The submarine volcano West Mata and adjacent volcanic...
2014-03 (iso8601)
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This report reviews the state of the California Current System (CCS) between winter 2012 and spring 2013, and includes observations from Washington State to Baja California. During 2012, large-scale climate modes indicated the CCS remained in a...
2013-12 (iso8601)
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The overflow of deep water from the Nordic seas
into the North Atlantic plays a critical role in global ocean
circulation and climate. Approximately half of this overflow
occurs via the Iceland–Scotland (I–S) overflow, yet the history
of its...
2013-09-03 (iso8601)
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Multibeam (1 m resolution) and side scan data collected from an autonomous underwater vehicle, and
lava samples, radiocarbon-dated sediment cores, and observations of flow contacts collected by remotely
operated vehicle were combined to...
2013-10-04 (iso8601)
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We use the NCEP/NCAR Reanalysis (NCEP)
and the MPI/ECHAM5 general circulation model to drive
the RegCM3 regional climate model to assess the ability of
the models to reproduce the spatiotemporal aspects of the
Pacific-North American teleconnection...
2014-03 (iso8601)
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Several evolutionarily significant units (ESUs) of Columbia River basin Chinook Salmon Oncorhynchus tshawytscha
and Coho Salmon O. kisutch are listed as threatened or endangered under the U.S. Endangered Species Act. Yet little is
known about the...
2014-01 (iso8601)
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We have compared the helium isotope ratio in five
samples of Pacific marine air spanning the 40 year period
between 1973 and 2013 against a secondary gas standard. In
a separate experiment we directly compared the ³He/⁴He
ratio in air samples...
2013-12-03 (iso8601)
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The trajectory of aquaculture growth in sub-Saharan Africa has necessitated closer attention to the use of environmental best management practices (BMPs). Two BMPs in particular, water reuse and floating feeds, are being promoted for adoption by...
2014-02-04 (iso8601)
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