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ScholarsArchive at Oregon State University
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We present evidence for pore water flow through the sediment of Crater Lake, Oregon based on systematic variations in pore water chemical compositions and thermal gradients. Pore water was extracted from sediment by centrifugation and diffusive...
1998-05-10 (iso8601)
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The Rainbow hydrothermal plume was
discovered during a recent geophysical survey along
200km of the Mid-Atlantic Ridge (MAR), SW of the
Azores Triple Junction, in which at least seven new sites
of hydrothermal activity were identified. Here, we...
1990-10-15 (iso8601)
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An interlaboratory study of Mg/Ca and Sr/Ca ratios in three commercially available carbonate reference
materials (BAM RS3, CMSI 1767, and ECRM 752-1) was performed with the participation of
25 laboratories that determine foraminiferal Mg/Ca ratios...
2008-08-19 (iso8601)
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Here we present the first downcore results for a new paleoproxy, the Mn/Ca ratio of foraminiferal
calcite, applied to sediment accumulated in the extreme Eastern Tropical North Pacific (ETNP) over the
last 30,000 years. The Mn/Ca results are...
2009-03-18 (iso8601)
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The primary Mg/Ca ratio of foraminiferal shells is a potentially valuable paleoproxy for sea surface
temperature (SST) reconstructions. However, the reliable extraction of this ratio from sedimentary calcite
assumes that we can overcome artifacts...
2004-12-30 (iso8601)
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Particles were collected from the dilute portion of neutrally buoyant hydrothermal plumes from four Mid-Atlantic Ridge sites (MARK, 23°N; TAG, 26°N; Broken Spur, 29°N; Lucky Strike, 37°N). Comparison of data from proximal portions of the TAG...
1996-11-15 (iso8601)
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Core-top benthic foraminifera (Cibicidoides wuellerstorfi) from a depth transect of Soutar box cores from the Ontong-Java Plateau (1.6 – 4.4 km) were analyzed for cadmium, barium, and strontium (Cd/Ca, Ba/Ca, and Sr/Ca) and for their stable...
1995-08 (iso8601)
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As part of the French-American Ridge Atlantic program the French-American Zero-Angle Photon Spectrometer and Rocks (FAZAR) cruise conducted water column studies between 33 and 40°N along the Mid-Atlantic Ridge (MAR) to detect hydrothermal...
1995-10-15 (iso8601)
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Large-scale lateral advection of seawater within the
oceanic crust is thought to be the cause of low heat flow in
the Equatorial Pacific. Until now supportive evidence is
limited to reversals of B and δ¹¹B, Ca, Mg, SO₄⁻², Sr and
⁸⁷Sr/⁸⁶Sr in...
2003-11-13 (iso8601)
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Meteorological conditions during an intensive oceanographic observational program
in May through August 2001 along the central Oregon coast are described and related to
larger-scale and longer-term conditions. Southward wind stresses of 0.05-0.1 N...
2005-10-27 (iso8601)
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Measurements of upper ocean shear made during the Mixed Layer Dynamics Experiment
(MILDEX) provide evidence of large horizontal scale motion at near-inertial frequency. The
measurements consist of shipboard acoustic Doppler current profiles. Four...
1989-06-15 (iso8601)
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Temperature was observed in the upper 80 m by moored thermistor chains at three locations in
Rockall Channel west of Scotland. Isotherms were interpolated, and a 1-week period of exceptionally
energetic tidal oscillations was analyzed. The moored...
1986-02-15 (iso8601)
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Several methods are developed for analyzing data containing a highly variable internal tide. In
particular, the methods are aimed at the analysis of moored observations with relatively few
measurements in the vertical. The analysis depends upon an...
1989-06-15 (iso8601)
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A statistical description of the deep ocean internal wave field is presented using measurements from the Midocean Acoustic Transmission Experiment, conducted near Cobb Seamount in the NE Pacific (46°46'N, 30°47'W) during June–July 1977. The unique...
1986-08-15 (iso8601)
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Internal gravity waves measured under the Arctic pack ice were strikingly different from measurements
at lower latitudes. The total wave energy, integrated over the internal wave frequency band, was lower by
a factor of 0.03-0.07, and the spectral...
1987-01-15 (iso8601)
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A model is developed to calculate the upper ocean internal wave spectrum as modified by the surface
boundary and mixed layer. The Garrett-Munk spectrum is assumed to describe the deep ocean wave
field. The main effect of the surface and mixed...
1987-05-15 (iso8601)
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The Sr, Nd, and Pb isotopic compositions of five Cretaceous guyots (Limalok, Lo-En, Wodejebato, MIT, and Takuyo-Daisan) within the West Pacific Seamount Province (WPSP) indicate that they originated from geochemically enriched mantle sources. They...
1995 (iso8601)
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The upper ocean current and temperature fields in the western Weddell Sea were measured from the drifting pack ice at Ice Station Weddell 1 (ISW) and nearby sites using a vertical profiler and an array of moored sensors in January–June 1992. These...
1997-01-15 (iso8601)
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The spectral composition of internal gravity waves under the Arctic pack ice during the Arctic
Internal Wave Experiment (AIWEX) was found to be strikingly different from observations at lower
latitudes. Time series of vertical displacement were...
1990-05-15 (iso8601)
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This review documents the advances in our knowledge of the oceanic internal wave field during the past quadrennium. Emphasis is placed on studies that deal most directly with the measurement and modeling of internal waves as they exist in the...
1983-06 (iso8601)
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The dissipation of internal wave energy in the turbulent boundary layer under pack ice is determined using a time‐varying boundary layer model with an eddy coefficient closure scheme. The magnitude of the eddy coefficient is determined by the ice...
1985-11-20 (iso8601)
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Hydrographic and velocity profiles were made through a small baroclinic cyclonic eddy during the Arctic Internal Wave Experiment in the Canada Basin in April 1985. The maximum measured azimuthal velocity was 0.38 m s⁻¹ at a depth of 115 m, with...
1990-06-15 (iso8601)
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The upward flux of heat from the subsurface core of Warm Deep Water
(WDW) to the perennially ice-covered sea surface over the continental slope in the
western Weddell Sea is estimated using data obtained during February-June 1992
from a drifting...
1995-09-15 (iso8601)
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Nitrate concentrations, chlorophyll a (Chl a) fluorescence, radiance, salinity, and
temperature were measured on the Hawaii Air-Sea Logging Experiment, A Long-Term
Oligotrophic Habitat Assessment (HALE ALOHA) mooring located near the Hawaii
Ocean...
2004-05-28 (iso8601)
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An approach developed recently to study the dynamics of vorticity defects in homogeneous
shear flow extends naturally to the case of baroclinic, quasi-geostrophic
flow. It is shown that an inviscid geostrophic flow with uniform vertical shear may...
1999-03 (iso8601)
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