MILDEX, a mixed layer dynamics experiment, began
October 21, 1983 and lasted until November 16, 1983.
R.P. Flip, R.V. Wecoma and R.V. Acania rendezvoused at
34° N, 127° W to participate in joint observations of
the mixed layer and upper ocean. This report contains
data from the WAve Zone Profiler,...
As part of the Peru Currents study, CTD observations were made between February 1983 and April 1985 between 3° N to 17° S off the coasts of Peru and Ecuador. Vertical sections of temperature, salinity and sigma-theta vs
depth from 0 to 625 m are presented for each section completed...
The stable isotope 15N was used to measure nitrogen uptake in the coastal upwelling region off Oregon and Washington, USA, where nitrate concentrations in the surface water ranged from 0.7 to 49.1 μM. Nanoplankton biomass (1 to 10 pm) was relatively more abundant at low-nitrate stations, while netplankton biomass (10...
Our component of the TROPIC HEAT 1987 experiment was
designed to investigate a number of questions raised by our
TROPIC HEAT 1984 measurements (Park et al, 1985; Mourn and
Caldwell, 1985; Mourn et al, 1986; Chereskin et al, 1986; Mourn et
al; 1987). In particular, the goals of LEG 2...
Transition metal and rare earth element (REE) data are presented
for various sedimentary materials from two Manganese Nodule
Program (MANOP) sites in the eastern tropical Pacific. These data
constrain the sources of elemental supply to the seafloor and the
processes that control ferromanganese nodule genesis. Investigation
of elemental partitioning between...
Daily commercial albacore catches made by U. S. trollers fishing
off central California and Oregon are correlated with daily upwelling
indices and predictive catch models are developed.
Models predicting total catch/day and catch/boat/day are
formulated for the region off central California in 1961 to 1963 and
off Oregon in 1967...
This report is a summary of my internship experience during
the summer of 1984. From June, 1984 through September, 1984, I
worked as a Graduate Intern II for the Alaska Department of Commerce
and Economic Development (ADCED) in Juneau, Alaska. Specifically,
I was associated with the Office of Commercial Fisheries...
Temperature observations are presented from 4 Aanderaa thermistor chains suspended from a free-floating surface buoy during October-November 1983 near 33.5° N, 126.5° W as part of the Mixed Layer Dynamics Experiment (MILDEX). Each chain contained 11 sensors; the upper two were 30 min length, the lower two were 100 m...
The School of Oceanography, Oregon State University, initiated a study during the spring of 1984 to investigate the utilization of Netarts Bay by juvenile churn salmon. Specific objectives the first year were to determine: 1) the relative numbers of hatchery arid wild churn salmon, 2) the nursery areas utilized by...
"The following analysis will deal with the use of science in
the development of policy and the execution of the Power Act.
Specifically, it will address how science, policy, and politics
play different roles in development, writing, and implementation
of a regional resource plan. To discuss this, some background on...
The shallow water benthic habitat of the SW Beaufort Sea is frequently
gouged by the keels of ice pressure ridges. This natural physical
disturbance was hypothesized to be an important factor affecting the
structure of the benthic community. Smith-McIntyre grab samples were
taken from three discrete gouge axes and from...
The purpose of this report is to provide the IDB with the available information on the current status of aquaculture in most of its South American member countries.
A finite difference scheme is employed to solve the
integral form of the momentum, continuity and heat
equations, for a two layer ocean bounded by a coastline.
The momentum equations include the turbulent dynamics and
the time-dependent and nonlinear terms in both the
cross-shelf and alongshelf directions. The system of...
This report is divided into several sections. The first provides information
on the current status of wetlands, the Corps' regulatory role, its statutory
enforcement authority, and its interpretation of that authority. The next
section describes the Portland District's enforcement structure and procedures.
A case study detailing the District's treatment of...
Groundwater is a vital resource and efforts must be made to protect its quality. In certain areas, its quality has been
threatened by the introduction of oil and gasoline, many times originating from underground storage tanks. Massachusetts has
directly reacted to this concern about groundwater quality by promulating a Massachusetts...
The following paper traces important decision processes
connected with initiating and constructing a coastal environmental
facility. There is a brief review of the early history and
summaries of the preliminary studies completed as of April 1986.
Particular focus is placed on the Oregon State University/Oregon
Coast Aquarium cooperative study. Finally,...
The surface-layer zone, occupying the upper 20 cm of the water column, represents a unique oceanic environment. A diverse assemblage of organisms occupies this zone, either in an obligate or facultative manner (Zaitsev 1970, Hempel and Weikert 1972, Cheng 1975, Peres 1982). Certain animals show morphological or biochemical adaptations to...
Using a linear quasi-geostrophic model of large scale spiraling flow and vertical density gradient in the eastern North Pacific, we evaluate the complex dispersion relationships for quasi-geostrophic waves. Our calculations indicate that the geostrophic circulation of the eastern North Pacific can locally convert potential energy to mesoscale kinetic energy on...
A long and gradual transition between the summer and winter
oceanic regimes was observed off Oregon during the autumn of 1980.
Hydrographic sections and a single current meter mooring between
August and December show the ocean possessed characteristics during
fall that have not been observed during other seasons: a slow...
This study was done for the Oregon State Marine Board and completed during the 6 month period of June through December of 1986. The purpose of this project is to provide information through reliable secondary data that will show the importance of boating recreation to the Oregon economy. The study...
Meteorological, sea surface temperature, and coastal sea level data were collected along the west coast of North America from northern Baja California to the Alaska/British Columbia border from 1980 to mid-1984 for the large-scale component of the Coastal Ocean Dynamics Experiment (CODE). This report presents statistical summaries and plots of...
One of the most important fisheries of the Austral zone,
corresponding to the Magallanes area and the Magellan Strait,
is the king crab (Centolla), Lithodes antarctica. The basic objective of this project is to describe the fisheries of this resource from an economic-biological stand point.
A 5km swath-width SeaMARC I sidescan sonar survey, conducted over
the zone of overlap between the southern rift zone of Axial Volcano and the northern
tip of the Vance spreading segment on the Juan de Fuca Ridge (between 45°24'N
and 45°50'N latitude), was analyzed to locate the present position of...
Rockfishes, Sebastes spp.. were the most numerous and speciose fishes seen during 16 submersible dives from 64 to 305 m depth in the vicinity of Heceta Bank off the coast of Oregon. Dense schools of juvenile rockfishes and large yellowtail rockfish, S. flavidus, were observed only over rocky, high relief...
The School of Oceanography, Oregon State University, conducted three cruises (May 19-June 2, June 7-22, and September 4-14) in 1982 to study the distribution, abundance, migration, growth and feeding habits of juvenile salmonids during their first summer in the ocean. This is the second year we have had a series...
The objective of this project is the production of a Tillamook
Bay restoration plan which is designed to revitalize the bay's
biological productivity and thereby stimulate economic
opportunity in the region. A selected planning team will assess
the cumulative impacts on the bay from accelerated sedimentation.
The team will develop...
Plastic waste in the oceans is now recognized as a serious threat to marine life and a pollution problem with economic consequences for mariners and coastal states. Annex V of MARPOL, effective December 1988, is an international treaty which prohibits signatory nations from disposing of any plastic material into the...
Juvenile coho salmon (101-400 mm) were sampled by
purse seine off the Pacific Coast from Waatch Point,
Washington to Four Mile Creek, Oregon, out to 30 mi
offshore, during the months of May, June, and September in
1982 and 1983. Sea surface temperature, surface salinity,
surface chlorophyll-a concentration, and Secchi...
The overall objective of this study is to propose a framework or model for
comprehensive management model of coastal development in Quintana Roo (Quintana
Roo's Coastal Management Program-QRCMP), using a regional approach.
Observations of oppositely directed, monthly mean alongshore currents and wind stress over the continental margin off the Pacific coast of North America motivate the theoretical examination of mean flow generation by topographic lee-wave drag. We formulate a barotropic model for wind-forced shelf-slope flow over variable topography. Our central objective is...
This paper will discuss some of the pressing issues and critical problems pertaining to the resources of the northern coast of Java and some alternative management strategies that may be applicable for the region. Some conclusions and recommendations are presented at the end of this paper.
Sea level and wind data from coastal and island stations from
Buenaventura, Colombia (4°N) to Callao, Peru (12°S) have been
analyzed for the 1979-1984 time period, to describe the seasonal and
interannual variations in the characteristics of short time scale
variability (1-2 weeks). Auto- and cross spectral analyses are used...
Small amounts of carbon from glucose and leucine added at natural
concentrations to seawater were biologically transformed to higher
molecular weight (MW) dissolved materials which persisted through six
months of incubation. These materials were resistant to biological
utilization: only 1 to 17% of the higher MW carbon was respired when...
Rates of molting of a specific copepodite stage can be determined by sorting the stage from a new collection, waiting, then counting the number that have molted to the next stage in the interval. In principle, stage duration can be determined as the inverse of the measured rate, and molting...
Following is a proposal for preparation of an Alsea Bay marine development
plan and graduate student internship as port manager. The plan would be
prepared during January - June 1984. Dr. Fred Smith and Jim Good have agreed to
supervise the plan preparation and provide university guidance.
Number of harbor seals, counted on 32 haul-out areas in Oregon, increased by 6 - 8.8 % per year from 1975 - 1983. Percent of seals in bays has increased an average 1.8%/year, from 47% in 1975 to 61% in 1983. Along the central Oregon coast, harbor seals were most...
A phytoplankton bloom dominated by the pennate diatom Nitzschia
curta (Van Heurck) Hasle was observed during January-February 1983 at
a receding ice-edge in the Western Ross Sea, Antarctica. The core of
the bloom was found between 100-150 Km from the ice-edge. Nitzschia
curta cell densities up to 22 x 10⁶...
Hydrographic and CTD measurements were taken from ninety-eight stations between Honolulu, Hawaii and Kodiak, Alaska from 4 May to 4 June 1984 on the second leg of the Marathon Expedition. This report consists of the cruise track, vertical sections, listings of all discrete hydrographic data, a subsample of the CTD...
Birth and pupping season records of Pacific harbor seals
(Phoca vitulina richardsi) were used in an analysis of
photoperiod effect on the timing of birth in this species. Dates
and latitudes of births were converted into photoperiods using a
photoperiod equation. Sequential dates from parturition were
converted into photoperiods and...
The area near Point Arguello has long been recognized as a location of strong
upwelling. A tongue of biologically active waters was observed in the earliest studies of
this region (Sverdrup and Allen, 1939). More recently, satellite estimates of chlorophyll by
the Coastal Zone Color Scanner (CZCS) on Nimbus-7 have...
The Optical Dynamics Experiment (ODEX) cruise of Oct and Nov 1982 occupied 1984 stations along a transect from the California coast at 35°N to a study area covering the subtropical front near 32°N, 142°W. This report presents data collected with spectral—radiometer instrument package and particle size distributions of discrete water...
The project presented here emphasizes a specific biological problem affecting the salmon cage culture with the final goal being to propose a realistic management strategy for fjordic estuaries worldwide.
From July, 1982 to August, 1983 I had the privilege of serving an internship
as an oceanographer at the National Marine Fisheries Service Beaufort
Laboratory. During the period of my appointment I assisted in a preliminary
assessment of the potential fishery impacts of ocean thermal energy conversion
(OTEC) power plants....
This report deals with the current status of four promising
sources of electrical energy generation from the oceans. They
are, in sequence;
Ocean Thermal Energy Conversion: Where energy is obtained by
exploiting the temperature differences between warm surface
waters, and much deeper colder waters.
Tidal Energy: Where differences in water...
Uptake of nitrogenous nutrients by microplankton off the Washington and Oregon coasts was measured during the 1985 upwelling period. Nitrogen uptake rates in low-NO3- waters (<5 μM) were 0.020–0.258 μmol N liter-1 h-1 and were primarily supported by regenerated nitrogen (71% of total uptake). Nitrogen uptake rates in high-NO3- waters...
As one member of a team of three consultants, my role was to provide a perspective from the discipline of oceanography, to incorporate new dune management policies into the County's Comprehensive Plan and Zoning Ordinance, and, to function as a liaison between the citizens of
Nedonna Beach and the project...
This report presents observations from moorings of temperature, conductivity
and pressure, made during the Arctic Internal Wave Experiment (AIWEX)
in March-April 1985.
The purpose of the temperature and conductivity measurements was to
provide time series from which inferences could be made about the vertical
displacement of the internal waves.
A series of profiles of velocity microstructure along 152°E in the western North Pacific Ocean were collected in May–June 1982. Large, averaged turbulent dissipation rates, ϵ, found in the main thermocline (400 to 1000 m) were determined by a combination of large independent estimates of ϵ and a greater rate...
Twelve days of microstructure measurements at the equator (140°W) in November 1984 showed a
surprisingly strong effect of both the daily cycle of solar heating and wind on mixing in the upper ocean.
Because of limited variations in atmospheric forcing and currents during the experiment, processes in the
daily mixing...
The Arctic Internal Wave Experiment (AIWEX) was designed to study the internal wave and microstructure fields in the Beaufort Sea in the early spring. A major goal of the experiment was to verify the hypothesis that the internal wave and microstructure fields beneath the ice are far less energetic than...
From September, 1984 through March, 1985, I worked as a Visiting
Intern for the Division of Special Programs, College of Arts and Sciences,
Northeastern University (NU). My position entailed the administration and
promotion of university marine related projects. The Division of Special
Programs is responsible for the development, implementation and...
Gray whales accomplish an annual migration which
spans as much as 50° of latitude in the northeast
Pacific Ocean. This migration links their summer high
latitude feeding grounds with winter calving and breeding
areas. The purpose of this study was to determine how
adult females apportion their stored lipid reserves...
This report is an overview of my experience working with
the Consortium for International Fisheries and Aquaculture
Development (CIFAD), administered from an office within Oregon
State University, Corvallis, Oregon. CIFAD is a non-profit
organization comprised of five U.S. universities: the University
of Arkansas at Pine Bluff (UAPB), University of Hawaii...
A thermistor chain was moored below the pack ice from 50–150 m in the Arctic Ocean for five days in 1981. Oscillations in temperature are attributed to the vertical dispalcement of internal waves. The spectral shape of isotherm dispalcement is consistent with the Garrett-Munk model and other internal wave observations,...
This paper is the product of a 15 month internship with the
U.S. Army Corps of Engineers. From July, 1985 through
September, 1986, I served as an environmental specialist for the
Portland District Regulatory Branch. My responsibilities included
evaluating environmental impacts of work conducted in Oregon's
waterways, through processing of...
CTD observations were made in the Code region near Pt. Arena on the northern California coast at 39° N during 14-27 July 1982. The observations in the Code region included three repeated sections along the Central Line, two mesoscale surveys of the shelf/slope region, and an alongshore section over the...
Grain-size distributions of gravels transported as bedload in Oak Creek, Oregon,
show systematic variations with changing flow discharges. At low discharges the gravel
distributions are nearly symmetrical and Gaussian. As discharges increase, the
distributions become more skewed and follow the ideal Rosin distribution. The patterns of
variations are established by...
