In this study methods were developed for the prediction of wave
conditions that are hazardous to navigation at river entrances, with
emphasis on applicability to the Columbia River. There are two basic
components to the prediction system: (1) a semi-automated spectral
method for forecasting the significant height and average period...
In January-February 1971 five replicate 0.07 m² Van Veen grabs
were obtained from each of 12 stations in Arthur Harbor and nine Van
Veen grabs were obtained from two stations in nearby Bismark Strait.
The 69 grab samples yielded 78,395 individuals which were separated
into 282 taxa, including 108 species...
Two separate studies on the distribution of gammarid amphipods in the bathyal and abyssal benthic environments demonstrated that different assemblages could be found at a single depth over distances on the order of 100 kilometers. These studies evaluated changes in the species composition and relative abundance of the amphipod assemblage...
Current observations were obtained at three locations forming
a cross section along 70°34'W longitude in Long Island Sound. Fifteen
days of data were selected from each series so that nearly
simultaneous observations were used in the analysis.
Elementary statistics were computed for the data prior to
performing a least squares...
The continental margin off southern Oregon, which includes the
shelf and slope from Cape Blanco to the Oregon-California border,
exhibits a distinctive marginal-plateau structural pattern which divides
the margin into the continental shelf, the upper continental slope and
its associated benches, and the lower continental slope. Lutum transport
and deposition...
A multidisciplinary western Beaufort Sea Ecological Cruise
(WEBSEC) was conducted from August 15 to September 20, 1971.
During the cruise, one hundred ninety-nine 0.1 m² Smith-McIntyre
grabs samples were taken at forty stations located on the continental
shelf and slope of the western Beaufort Sea. The Gammaridean
Amphipoda and Cumacea...
Heavy minerals can contain potentially economic amounts of
metals as both matrix and trace constituents. Such minerals appear
as unconsolidated black sands on the continental shelf off southwest
Oregon and along the Oregon coast. Two diverse energies are considered in this investigation. Environmental energy of the depositional
regimen, Part I;...
This study examines the seasonal variability in temperature and
salinity of the nearshore waters off Oregon and Northern California.
Specifically, temperature and salinity variations during summer and
winter were ana1yzed from data gathered at shore stations along the
coast and from hydrographic data collected within 25 nautical miles
of shore....
Measurements of the fluctuations of humidity, temperature
and velocity were made in the marine boundary layer. The humidity
fluctuations were measured with a Lyman-alpha humidiometer.
Temperature fluctuations were measured with a dry thermocouple
and a platinum resistance thermometer. Velocity fluctuations were
measured with a three component sonic anemometer. These measurements...
This study examined the foraminifera and the ecologic conditions
of the benthic environment of the Oregon shelf and the uppermost slope
(75-550 m depth) between 143°45' N and 144°40' N. Seasonal collections
monitored the near-bottom marine environment and the sedimentary
substrate at 16 stations. The foraminiferal benthic fauna was
examined...
The stoichiometric model of organic decomposition in seawater
(Redfield, Ketchum, and Richards, 1963) was used to describe the
oceanic distribution of total carbon dioxide. It was assumed that the
concentration of total carbon dioxide was the sum of three terms:
(1) the initial concentration of carbon dioxide, (2) the increase...
A three component drag probe has been built, calibrated, and
used to measure velocities beneath deep water ocean waves and
turbulence in a tidal channel. Simple variable inductance devices
which may be submerged in water were used as displacement transducers
and the associated electronics provided voltage outputs which
were proportional...
Sea level and current observations made over the Oregon
continental shelf exhibit wavelike characteristics in a frequency band
from approximately 0.15 to 0.45 cpd. In a narrow band around
0.22 cpd the current-sea level relationship is consistent with the
predicted values for the first mode of Robinson's continental shelf
waves....
The distribution of surface sediments on the northern Oregon
continental shell is characterized by a nearshore sandy facies and an
outer shelf muddy facies, separated by a mid-shelf zone of mixed
sand and mud. Currents which have been measured at 130 centimeters
above the bottom indicate that the distribution of...
This study examines the relationship between fishing activities
of Pacific Northwest albacore fishermen and the availability of albacore.
Tactical responses of troll-boat fishermen were compared to
changes in daily apparent albacore abundance. Tactical responses
included boat aggregation and total applied effort (number of boats)
within a particular area, and net...
The behavior of the shore crab Hemigrapsus oregonensis was assessed
with and without exposure to polychlorinated biphenyls (Aroclor 1260).
After describing the crab's behavioral repertoire, activity budgets were
developed from observations of the time crabs spent in 20 categories of
shelter use, posture, and activity while held in habitat replicas...