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ScholarsArchive at Oregon State University
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An idealized global climate model is used to explore the response of the climate to a
wide range of dust radiative properties and dust layer heights. The top-of-the-atmosphere
(TOA) shortwave forcing becomes more negative as the broadband...
2007-02-08 (iso8601)
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Ingestion and respiration by Metridia pacifica, the dominant large copepod during autumn and winter in the subarctic Pacific, were investigated by shipboard and laboratory experiments. Diel variation in the rate of grazing on phytoplankton by M....
1986-12-19 (iso8601)
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We analyzed 7 years (2002–2008) of micrometeorological and concurrent biological
observations of carbon and water fluxes at a mature ponderosa pine forest in central
Oregon in a semiarid climate. We sought to evaluate the extent that gross...
2009-11-10 (iso8601)
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The dynamic response to a westerly wind burst which occurred during the Couple Ocean Atmosphere Response Experiment in the warm pool of the equatorial Pacific Ocean is described using velocity, hydrography, and microstructure measurements....
1996-10-15 (iso8601)
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A westerly wind burst observed in the warm pool of the western equatorial Pacific Ocean cooled the ocean's surface layer by about 0.8°C. Turbulent entrainment at the base of this layer caused cooling but also heating due to the reversal of the...
1996-10-15 (iso8601)
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The High Lava Plains province (HLP) is a late Cenozoic bimodal volcanic field at
the northern margin of the Basin and Range province in southeastern Oregon that hosts
a westward younging trend of silicic volcanism that crudely mirrors...
2004-10-05 (iso8601)
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Crystallization ages of volcanic rocks, dredged or drilled from the Walvis Ridge (ten sites) and the Rio
Grande Rise (one site), have been determined by the ⁴⁰Ar/³⁹Ar incremental heating technique. The
fundamentally age-progressive distribution of...
1990-10-10 (iso8601)
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Davidson Seamount, a volcano located about 80 km off the central California coast, has a volume of
~320 km³ and consists of a series of parallel ridges serrated with steep cones. Davidson was sampled and
its morphology observed during 27 ROV...
2009-12-16 (iso8601)
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We report the behavior of the earth's magnetic field for a transition recorded in lavas at the volcanic island of
Huahine in French Polynesia, south-central Pacific Ocean. Detailed intermediate fields are observed that record an
apparent N-N...
1990-03-10 (iso8601)
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Glacial sedimentary sequences in the north central United States record multiple advances of the
Laurentide Ice Sheet (LIS) since ~2 Ma. Although the tills found in these sequences were deposited by
southward flowing glacial lobes, little...
2007-09-18 (iso8601)
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Satellite altimeter measurements of marine gravity reveal 100 to 200-km
wavelength lineations over a wide area of the Pacific plate oriented roughly in the direction of
absolute plate motion. At least three mechanisms have been proposed for their...
1995-08-10 (iso8601)
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At the submerged margins of the North Atlantic, andesitic to dacitic and basaltic volcanic rocks
occur together. The silicic rocks were derived by processes requiring the presence of continental crust
(crustal anatexis and/or contamination of...
1998 (iso8601)
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Rapid eruption of submarine lava flows during formation of the Caribbean plateau correlates closely with
ocean anoxic event 2 (OAE2), which bracketed the Cenomanian/Turonian boundary (~93.5 Ma). These events
also correspond with a positive...
2005-08-04 (iso8601)
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New K-Ar age determinations on
basalts, basaltic andesites, and ash flow
tuffs from the central Western Cascades in
Oregon range in age from 32 to 3 Ma. The
ages decrease from west to east and with
increasing elevation. Volcanism has been...
1987-04 (iso8601)
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We have combined shipboard and Seasat altimeter derived data in an intergrated geological and
geophysical study of the Louisville Ridge; a 3500-km-long seamount chain extending from the Tonga
trench to the Eltanin Fracture Zone. A break in the...
1988 (iso8601)
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We report new major element, trace element, isotope ratio, and geochronological data on the Galapagos
Archipelago. Magmas erupted from the large western volcanos are generally moderately fractionated tholeiites of
uniform composition; those...
1993-11-10 (iso8601)
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We present new 3He surface exposure ages on moraines and bedrock near the summit of Mauna Kea, Hawaii, which refine the age of the Mauna Kea Ice Cap during the Local Last Glacial Maximum (LLGM) and identify a subsequent fluctuation of the ice...
2010 (iso8601)
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Abundances of larval walleye pollock in Shelikof Strait, Gulf of Alaska, in 1981 were far
greater than any recorded estimates before that time or since (some patch estimates exceeded 100000
larvae per 10 m²). In spite of this extraordinary input,...
2002-11-13 (iso8601)
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Climate can affect population dynamics in indirect ways via nonadditive
forcing by external variables on internal demographic rates. Current analytical techniques,
employed in population ecology, fail to explicitly include nonadditive interactions...
2004-12 (iso8601)
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The majority of survival analyses focus on temporal scales. Consequently, there
is a limited understanding of how species survival varies over space and, ultimately, how
spatial variability in the environment affects the temporal dynamics of...
2007-03 (iso8601)
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Broadband body waves recorded at 15 digital
seismic stations worldwide are used to study the rupture
process of the May 23, 1989 Macquarie Ridge earthquake.
The centroidal solution (strike 211°, dip 86°, rake 180°, and
depth of 10 km below the...
1990 (iso8601)
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Horizontal current measurements from an array of moored acoustic Doppler profilers are assimilated sequentially into a model of coastal wind-driven circulation off Oregon during the upwelling season of May–August 2001. Model results are compared...
2005-09-29 (iso8601)
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An optimal interpolation (OI) sequential algorithm is implemented for a three-dimensional primitive equation model to assimilate current measurements from acoustic Doppler profilers moored on the Oregon shelf as a part of the Coastal Ocean...
2005-02-22 (iso8601)
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We analyzed the sedimentological characteristics and magnetic properties of cores from the three basins of Clear Lake, California, USA, to assess the depositional response to a series of land use changes that occurred in the watershed over the...
2008-12 (iso8601)
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We report the intercalibration of paleomagnetic secular variation (PSV) and radiocarbon dates of two
expanded postglacial sediment cores from geographically proximal, but oceanographically and
sedimentologically contrasting settings. The objective...
2007-02-23 (iso8601)
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