Index Catalog // ScholarsArchive@OSU

Creator:: Lippmann, T. C. and Holman, Robert A.
Abstract:: A technique is presented to remotely measure the scales and morphology of natural sandbars based on the preferential dissipation of wind waves and swell over the crests of the bar. Photographic or video images are recorded and statistical uncertainties associated with incident wave height modulations removed by averaging (time exposures)....
Resource Type:: Article
Full Text:: , 1989 Quantification of Sand Bar Morphology: A Video Technique Based on Wave Dissipation T. C

Creator:: Chickadel, C. C., Holman, Robert A., and Freilich, Michael H.
Abstract:: We present an optical method (optical current meter) to measure the longshore component of nearshore surface currents by measuring the alongshore drift of persistent sea foam in the surf zone. The method uses short time series of video data collected from an alongshore array of pixels. These space-time data are...
Resource Type:: Article
Full Text:: longshore currents C. C. Chickadel, R. A. Holman, and M. H. Freilich College of Oceanic and Atmospheric

Creator:: Chickadel, C. C., Holman, Robert A., and Freilich, M. H.
Abstract:: We present an optical method (optical current meter) to measure the longshore component of nearshore surface currents by measuring the alongshore drift of persistent sea foam in the surf zone. The method uses short time series of video data collected from an alongshore array of pixels. These space-time data are...
Resource Type:: Article
Full Text:: longshore currents C. C. Chickadel, R. A. Holman, and M. H. Freilich College of Oceanic and Atmospheric

Creator:: Miller, Robert N.
Abstract:: 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 FSU monthly mean pseudostress anomaly data. These perturbed pseudostress anomaly fields...
Resource Type:: Article
Full Text:: ROBERT N. MILLER College of Oceanography, Oregon State University, Corvallis A series of observing

Creator:: Duncan, Robert A.
Abstract:: K-Ar and ⁴⁰Ar-³⁹Ar geochronologic data reveal the Paleocene to Eocene eruptive history of volcanic centers which produced the basaltic basement rocks of the Coast Range of Oregon and Washington. Volcanism was short lived at each center and migrated with time from the northern and southern ends toward the center, near...
Resource Type:: Article
Full Text:: CAPTURED ISLAND CHAIN IN THE COAST RANGE OF OREGON AND WASHINGTON Robert A. Duncan School of

Creator:: Duncan, Robert A.
Abstract:: Radiometric ages (K-Ar and ⁴⁰Ar- ³⁹Ar methods) have been determined on dredged volcanic rocks from seven of the New England Seamounts, a prominent northwest-southeast trending volcanic lineament in the northwestern Atlantic Ocean. The ⁴⁰Ar-³⁹Ar total fusion and incremental heating ages show an increase in seamount construction age from southeast to...
Resource Type:: Article
Full Text:: - search. Paleomagnet•c and paleoclimatic data estimate plate motions with respect to the earth spin axis

Creator:: Beardsley, Robert C., Denver, Edward P., Lentz, Steven J., and Dean, Jerome P.
Abstract:: Surface heat flux components are estimated at a midshelf site over the northern California shelf using moored measurements from the 1981-1982 Coastal Ocean Dynamics Experiment (CODE) and the 1988-1989 Shelf Mixed Layer Experiment (SMILE). Time series of estimated fluxes extend from early winter through summer upwelling conditions, allowing examination of...
Resource Type:: Article
Full Text:: Surface heat flux variability over the northern California shelf Robert C. Beardsley Department of

Creator:: Miller, Robert N., Busalacchi, Antonio J., and Hackert, Eric C.
Abstract:: 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. Estimates of error statistics were calculated and compared to actual differences between hindcasts...
Resource Type:: Article
Full Text:: surface topography fields of the tropical Pacific from data assimilation Robert N. Miller College of

Creator:: Haller, Merrick C., Dalrymple, Robert A., and Svendsen, Ib A.
Abstract:: Wave and current measurements are presented from a set of laboratory experiments performed on a fixed barred beach with periodically spaced rip channels using a range of incident wave conditions. The data demonstrate that the presence of gaps in otherwise longshore uniform bars dominates the nearshore circulation system for the...
Resource Type:: Article
Full Text:: beach with rip channels Merrick C. Haller1 Cooperative Institute for Limnology and Ecosystems

Creator:: Lippmann, T. C., Holman, Robert A., and Bowen, A. J.
Abstract:: Theoretical growth rates for resonantly driven edge waves in the nearshore are estimated from the forced, shallow water equations of motion for the case of a plane sloping bed. The forcing mechanism arises from spatial and temporal variations in radiation stress gradients induced by a modulating incident wave field. Only...
Resource Type:: Article
Full Text:: water T. C. Lippmann Center for Coastal Studies, Scripps Institution of Oceanography, La Jolla

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