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ScholarsArchive at Oregon State University
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We report significant rates of dinitrogen (N₂) fixation in the central basins of the Gulf
of California (GC) during July–August 2005. Mixing model estimates based upon
δ¹⁵N values of particulate matter in the surface mixed layer indicate that N₂...
2007-05-30 (iso8601)
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Population dynamics of Calanus finmarchicus have been modelled using very finely divided representation of the stock according to age-within-stage, in the manner of models developed by C. S. Davis, A. Sciandra, F. Carlotti and others. A key...
1993-12-09 (iso8601)
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Ecological effects of populations of the salp Cyclosalpa bakeri were studied in late
summer of 1984, 1987 and 1988 dunng the Subarctic Pacific Ecosystem Research (SUPER) project at
Station P in the northeast Pacific. Salps occurred largely in the...
2010-08-17T18:27:21Z (iso8601)
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Calanus finmarchicus (Gunnerus) stratify narrowly near 500 m depth during their fifth copepodite resting phase in North Atlantic Slope Water off southern New England, USA. They probably achieve this by migration to a specific, daytime isolume....
1991-05-23 (iso8601)
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The upwelling-driven coastal jet off Oregon is in geostrophic balance to first order.
The accompanying thermal wind shear is stable to shear instability. Yet enhanced
turbulence is observed in the upwelling jet, typically as long, thin patches...
2007-06-28 (iso8601)
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Microstructure observations near upwelled fronts indicate considerable variation in the structure of
vertical mixing across the frontal region. Observations of cool filaments off northern California
indicate that within the cool (dense) core of...
1990-06-15 (iso8601)
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In November-December 1984 we carried out an intensive 12-day upper ocean sampling program on
the equator at 140°W as part of the Tropic Heat Experiment. From our observations we constructed
hourly averaged profiles of temperature, salinity, σ₁,...
1986-11-15 (iso8601)
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Repeated microstructure transects across filaments in the coastal transition zone (CTZ) have
Revealed fundamental structure and dynamics of the complicated features. The measurements allow
detailed momentum and vorticity analyses and provide a...
1991-08-15 (iso8601)
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This paper presents observations of a dynamic minifilament and summarizes the findings of
three microstructure surveys across and within the meandering current structures of the Coastal
Transition Zone (CTZ). An actively turbulent minifilament is...
1993-08-15 (iso8601)
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A new method is presented for estimating the vertical turbulent heat flux at the bottom of the daily
mixed layer from the temperature data in the mixed layer and net solar irradiance data at the sea surface.
We assume that fluctuations in the...
1988-11-15 (iso8601)
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A sequence of three internal solitary waves of
elevation were observed propagating shoreward along a
near-bottom density interface over Oregon’s continental
shelf. These waves are highly turbulent and coincide with
enhanced optical backscatter,...
2003-10-23 (iso8601)
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From a comprehensive set of upper ocean measurements made during a moderate El Niño in boreal spring 1987, we reassess the role of turbulence in transporting momentum vertically at the equator. An examination of the terms in the vertically...
1991-04-15 (iso8601)
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The arduous task of finding a solution to the enduring salmon crisis calls for
a non-trivial, comprehensive approach. Such a solution is likely to affect virtually
everyone in the Pacific Northwest. Ensuring public understanding of and support
for...
2003-11-26 (iso8601)
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Twelve days of microstructure measurements at the equator (140°W) in November 1984 showed a
surprisingly strong effect of both daily cycle of solar heating and wind on mixing in the upper ocean.
Because of limited variations in atmospheric forcing...
1989-02-15 (iso8601)
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Estimates of heat flux from direct measurements of vertical velocity-temperature
fluctuation correlations have been obtained from vertical profiles
through turbulent patches in the main thermocline. These have been compared
to more indirect flux...
1996-05-15 (iso8601)
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From measurements of the energy-containing scales of turbulence in the
ocean thermocline, two new formulations are examined: (1) an inviscid estimate
for the viscous dissipation rate of turbulent kinetic energy and (2) a mixing
length estimate for...
1996-06-15 (iso8601)
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Near the bottom, the velocity profile in the bottom boundary layer over the continental
shelf exhibits a characteristic law-of-the-wall that is consistent with local estimates of
friction velocity from near-bottom turbulence measurements. Farther...
2005-09-28 (iso8601)
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Comprehensive observations of velocity, density, and
turbulent dissipation permit quantification of the nonlinear
internal wave (NLIW) contribution to vertical heat flux and
lateral mass transport over New Jersey’s shelf. The effect of
NLIWs on...
2010-04-24 (iso8601)
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The well-known fact that tropical sea level can be usefully simulated by linear wind driven models recommends it as a realistic test problem for data assimilation schemes. Here we report on an assimilation of monthly data for the period 1975-1992...
1996-10-15 (iso8601)
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This paper presents a series of observing system simulation experiments
(OSSEs) which are intended as a design study for a proposed array of instrumented
moorings in the tropical Atlantic Ocean. Fields of TOPEX/Poseidon sea surface height...
1998-04-15 (iso8601)
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Time series of maps of monthly tropical Pacific dynamic topography
anomalies from 1979 through 1985 were constructed by means of assimilation of tide
gauge and expendable bathythermograph (XBT) data into a linear model driven by
observed winds....
1995-07-15 (iso8601)
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A series of observing system simulation experiments (OSSE) is performed on a simulated data
set which was designed to mimic the wind-forced response of the tropical Pacific ocean. This
data set was constructed by adding random perturbations to the...
1990-07-15 (iso8601)
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Optimal interpolation (OI) has been used to produce analyses of quasi-geostrophic (QG) stream
function over a 59-day period in a 150-km-square domain off northern California. Hydrographic
observations acquired over five surveys, each of about 6...
1991-08-15 (iso8601)
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The St. Elias, Alaska earthquake of 28 February, 1979 (M s 7.2) is reanalyzed using broadband
teleseismic body waves and long-period surface waves because of unresolved questions about its depth,
focal mechanism, seismic moment, and location in a...
1992-05-10 (iso8601)
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