42 research outputs found
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A description of hydrography, winds, and currents during the upwelling season near Newport, Oregon
Several series of measurements of the hydrography, currents,
and winds during the past ten years are used as a basis for an overview
of the physical oceanography and meteorology during the
upwelling season near Newport, Oregon. Data are described using
elementary statistics, progressive vector diagrams, coordinate system
independent spectra, and complex demodulation.
The resulting description strengthens and extends the conceptual
model of coastal upwelling. Averages of various series of data are
calculated with the aim of making the collected information more
readily available and giving perspective to specific data.
The time series analysis indicates which bands of frequencies
contain important portions of the coherent energy. Complex demodulation
is used to show how the energy in selected frequency bands is
distributed as a function of time.
It is concluded that the long-term seasonal average of the winds
and the hydrography behaves smoothly, but the short-term fluctuations
around the average are important. The relationships between the
short-term variations in the current and hydrography are as yet
unclear, but directions are indicated for further analysis and experimentation
Recommended from our members
A Compilation of observations from moored current meters. Vol. 15. Currents, temperature, and pressure collected near the Emperor Sea Mounts, June 1982 - November 1983
Recommended from our members
A Compilation of observations from moored current meters. Vol. VII. Oregon continental shelf, July-August 1973
Aanderaa recording current meters, moored off the Oregon coast at fixed depths measured water temperature, current speed, current direction and for some meters, conductivity and pressure. In addition to these subsurface meters, surface meteorological buoys were installed to measure wind speed, wind direction, air and water temperature. Data from each current meter string are shown by means of pertinent statistics, real time plots of hourly values, progressive vector diagrams, and rotary spectra
Recommended from our members
A compilation of observations from moored current meters. Vol. VIII. Wind, currents and temperature off Northwest Africa along 21°40' N during JOINT-1
Current meters, moored during JOINT-I in the coastal upwelling area off Northwest Africa along 21°40'N measured current speed and direction, temperature and, in some cases, conductivity and pressure. In addition, surface buoy meterological stations were installed at some current meter strings to record wind speed and direction, as well as air and water temperature.
The sampling intervals of the instruments were 5 and 10 minutes. The data have been filtered and are shown here by means of pertinent statistics, real time plots, progressive vector diagrams and rotary spectra of hourly values
Recommended from our members
A compilation of observations from moored current meters. Vol. 12. Currents, temperature and pressure in the Drake Passage during FDRAKE 77, 78, January 1977-January 1979
Internally recording instruments were installed in the Drake Passage in January 1977 and recovered in December 1977. Additional instruments were installed at this time and recovered in January 1979. The first array consisted of 21 Aanderaa current meters on five moorings. The second array was one mooring with three current meters. The data were taken at one hour intervals.
In this report the measurements are summarized through pertinent statistics, progressive vector diagrams, real time plots, stick figures, rotary spectra, and conventional power spectra
Recommended from our members
A Compilation of observations from moored current meters. Vol. 6. Oregon continental shelf, April-October 1972
Aanderaa recording current meters, moored in CUE-I off the Oregon coast at specific depths along both the Newport hydrographic line and perpendicular to the isobaths off Depoe Bay, were set to measure water temperature, current speed, current direction and, in some cases, pressure. In addition, surface buoy meteorological stations were moored at points along these same lines to measure wind speed, direction and air and water temperature. Data from
each current meter string are shown by means of pertinent statistics, real time plots of hourly values, progressive vector diagrams and rotary spectra. The appendices describe the actual operation of the Aanderaa current meter and the methods used to process the data
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Seasonal variation of the alongshore velocity field over the continental shelf off Oregon
The seasonal variation in the alongshore velocity field is inferred from direct current observations made over the Oregon continental shelf at various locations and irregular intervals since 1965. Monthly mean currents are computed and compared with earlier studies to give a description of the seasonal variation in the alongshore currents. In winter, the alongshore flow is generally northward and independent of depth. In spring, flow is southward at all depths but stronger near the surface. In summer, surface flow is southward and deep flow is northward; the southward surface flow forms a coastal jet and the deep northward velocity increases with distance offshore
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A compilation of observations from moored current meters. Vol. 11. Currents, temperature and pressure in the Drake Passage during F DRAKE 76 : February 1976-January 1977
Self-recording instruments were installed in Drake
Passage in February 1976 and recovered in January 1977.
The instrument array consisted of eleven Aanderaa current
meters on seven moorings and two tide gauges. The data
were sampled at one hour intervals.
In this report the measurements are summarized through
pertinent statistics, progressive vector diagrams, real
time plots, stick figures, and rotary spectra
Recommended from our members
A compendium of physical observations from JOINT-I : vertical sections of temperature, salinity and sigma-t from R/V GILLISS data and low-pass filtered measurements of wind and currents
During February, March and April 1974, the interdisciplinary Coastal
Upwelling Ecosystems Analysis experiment known as JOINT-I took place over
the continental shelf and slope near Cabo Corveiro in the NW African upwelling
region. As part of the field program, Oregon State University
made a series of repeated hydrographic surveys from R/V GILLISS along
latitudes 21°2O'N and 2l°4O'N (Fig. 1). The more northerly line was the
site of the current meter mooring and meteorological buoy array maintained
during the same period by Oregon State University in cooperation with the
Deutsches Hydrographisches Institut, Hamburg. This report contains the
complete set of contour plots of hydrographic section and anchor station
data obtained by OSU. The low-pass filtered time series of current and
wind measurements from each OSU mooring are also included
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A compilation of observations from moored current meters and thermographs. Vol. 3. Oregon continental shelf, May-June 1967, April-September 1968
A summary of one phase of a direct observational program conducted
in the coastal region off Oregon is presented. The measurements
were made primarily on the continental shelf during most of the coastal
upwelling season (May and June 1967; April through September 1968).
The principal measurements were time series of horizontal current
velocity and temperature fields; these observations were made with an
array of moored, recording meters. Supplementary measurements of
hydrographic variables, wind, atmospheric pressure, and mean sea level
were also made