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ScholarsArchive at Oregon State University
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Many Earth science disciplines are currently experiencing the emergence of new ways of data
publication and the establishment of an information technology infrastructure for data archiving and
exchange. Building on efforts to standardize data and...
2003-01-25 (iso8601)
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South Pacific intraplate volcanoes have been active since the Early Cretaceous. Their HIMU-EMI-EMII mantle sources can be traced back into the West Pacific Seamount Province (WPSP) using plate tectonic reconstructions, implying that these...
2003-10-28 (iso8601)
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The issue of permanent nondipole contributions to the time-averaged field lies at the very heart of
paleomagnetism and the study of the ancient geomagnetic field. In this paper we focus on paleomagnetic
directional results from igneous rocks of...
2003-04-11 (iso8601)
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The summit crater of Vailulu’u Seamount, the youngest volcano in the Samoan chain, hosts an active
hydrothermal system with profound impact on the ocean water column inside and around its crater (2 km
wide and 407 m deep at a 593 m summit depth)....
2004-02-10 (iso8601)
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We report new ⁴⁰Ar/³⁹Ar ages for the oldest Pacific oceanic floor at Ocean Drilling Program Site 801C
in the Pigafetta basin and Site 1149D close to the Izu-Bonin subduction zone in the Nadezhda basin. These
ages were determined by applying...
2003-11-25 (iso8601)
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The Louisville seamount trail has been recognized as one of the key examples of hot spot volcanism, comparable to the classic volcanic Hawaiian-Emperor lineaments. The published total fusion ⁴⁰Ar/³⁹Ar data of Watts et al. [1988] showed an...
2004-06-19 (iso8601)
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The ambient temperatures and humidities required for contrail formation
and persistence are determined from in situ measurements during the
Subsonic Aircraft: Contrail and Cloud Effects Special Study (SUCCESS) experiment.
Ambient temperatures and...
1998-02-27 (iso8601)
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In situ measurements of water vapor and temperature from recent
aircraft campaigns have provided evidence that the upper troposphere is frequently
supersaturated with respect to ice. The peak relative humidities with respect
to ice (RHI)...
2001-08-16 (iso8601)
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It has been hypothesized that continuous ground-based remote sensing measurements
from collocated active and passive remote sensors combined with regular soundings of the
atmospheric thermodynamic structure can be combined to describe the effects...
2006 (iso8601)
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A continuous flow diffusion chamber (CFDC) was used to measure ice formation by
cloud particle residuals during the Cirrus Regional Study of Tropical Anvils and Cirrus
Layers-Florida Area Cirrus Experiment. These measurements were directed toward...
2007 (iso8601)
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Ice crystal larger than about 5 μm diameter were separated from interstitial particles in aircraft contrails and evaporated. Residual particles larger than 0.1 μm were analyzed by electron microscopy. Soot, metals, and volatile organic substances,...
1998 (iso8601)
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One important role of anthropogenic aerosol particles
is their influence on climate by acting as cloud condensation
nuclei. However, these particles are diverse in composition
and mixing state, and our knowledge of which particle types
act as...
2005 (iso8601)
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Planktonic foraminiferal faunas of the southeast Pacific indicate that sea surface temperatures (SST) have
varied by as much as 8–10°C in the Peru Current, and by ~5–7°C along the equator, over the past 150,000 years.
Changes in SST at times such...
2003 (iso8601)
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Sea surface temperature (SST) and salinity of the Western Pacific Warm Pool (WPWP) reflect global
climate effects such as the El Nin˜o–Southern Oscillation phenomenon. However, reconstructions of past
changes in the WPWP from the geologic record...
2007 (iso8601)
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Application of the ²³⁰Th normalization method to estimate sediment burial fluxes in six cores from the
eastern equatorial Pacific (EEP) reveals that bulk sediment and organic carbon fluxes display a coherent regional
pattern during the Holocene...
2007 (iso8601)
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We have used the vanadium concentration in cleaned foraminiferal calcite as a tracer
of seawater V changes in the past. Since the benthic flux of vanadium is sensitive to the redox potential
of sediments, changes in the vanadium concentration of...
1996-12 (iso8601)
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In order to quantify changes in export production and carbonate dissolution over the past 1 Myr in the
central equatorial Pacific Ocean we analyzed Ba, P, Al, Ti, and Ca in 1106 samples from five piston cores gathered from
5°S to 4°N at 140°W. We...
2000-12 (iso8601)
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Northeast Pacific benthic foraminiferal δ¹⁸O and δ¹³C reveal repeated millennial-scale events of strong deep-sea
ventilation (associated with nutrient depletion and/or high gas exchange) during stadial (cool, high ice volume) episodes
from 10 to...
1998-02 (iso8601)
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We constructed biogenic mass accumulation rate (MAR) time series for eastern Pacific core transects across the equator
at ~105˚and ~85˚W and along the equator from 80˚to 140˚W. We used empirical orthogonal function (EOF) analysis to
extract...
2002 (iso8601)
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During the Indian Ocean Experiment (INDOEX), cloud droplets were collected and evaporated using a counterflow virtual impactor (CVI). The nonvolatile residual particles were then analyzed by various instruments. Physical and chemical properties of...
2001-11-27 (iso8601)
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A case study of new particle formation in the region downwind of a mesoscale
convective system stretching across much of the central United States is presented.
Airborne measurements were made of condensation nuclei (CN), cloud particle surface...
2002 (iso8601)
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The sensitivity of the tropics to climate change, particularly the amplitude of glacial-to-interglacial changes in
sea surface temperature (SST), is one of the great controversies in paleoclimatology. Here we reassess faunal estimates of
ice age...
1999-06 (iso8601)
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Data from nine stratocumulus clouds in the northeastern Pacific Ocean were analyzed
to determine the effect of aerosol particles on cloud microphysical and radiative properties.
Seven nighttime and two daytime cases were included. The number...
2005 (iso8601)
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We report the first measurements of CO₂, CH₄,
N₂O, CO₂, and H₂O(g) in the exhaust trails of T-39, B-757, and
DC-8 aircraft at cruise conditions. Emission indices (El)
derived from these in-situ measurements are presented.
Results are in agreement...
1998-05-15 (iso8601)
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In flight through a wave cloud during SUCCESS on 2 May 1996, simultaneous forward- and aft- facing NOy inlets were used to infer the amount of condensed-phase NOy present on ice particles that were up to a few minutes old. Condensed-phased amounts...
1998 (iso8601)
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