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Offshore controls on nearshore rip currents

Creator:: Long, Joseph W. and Özkan-Haller, H. Tuba
Abstract:: The rip current field resulting from the transformation of surface gravity waves over offshore submarine canyons is studied. Employing a wave transformation model and a wave-induced circulation model over observed bathymetry we find that wave height variations associated with undulations in the canyon contours cause rip current circulation cells with...
Resource Type:: Article
Full Text:: Joseph W. Long and H. Tuba Özkan-Haller College of Oceanic and Atmospheric Sciences, Oregon State

Low-frequency characteristics of wave group-forced vortices

Creator:: Long, Joseph W. and Özkan-Haller, H. Tuba
Abstract:: The dynamics of vorticity motions forced by wave groups incident on an alongshore-uniform barred beach are analyzed. For both normally and obliquely incident wave groups, the potential vorticity and enstrophy equations reveal that the temporal variability of wave group–forced vortices is directly linked to the variability in the incoming wave...
Resource Type:: Article
Full Text:: vortices Joseph W. Long1 and H. Tuba Özkan-Haller1 Received 1 May 2008; revised 25 March 2009; accepted

Air-water CO₂ fluxes in the microtidal Neuse River Estuary, North Carolina

Creator:: Crosswell, Joseph R., Wetz, Michael S., Hales, Burke, and Paerl, Hans W.
Abstract:: From June 2009 to July 2010, we conducted 27 continuous-flow surveys of surface water CO₂ partial pressure (pCO₂) along the longitudinal axis of the Neuse River Estuary (NRE), North Carolina ranging from the tidal freshwater region to the polyhaline border with the Pamlico Sound. Lateral transects were also conducted at...
Resource Type:: Article
Full Text:: Carolina Air-water CO2 fluxes in the microtidal Neuse River Estuary, North Carolina Joseph R. Crosswell

Diffuse attenuation coefficient of downwelling irradiance: An evaluation of remote sensing methods.pdf

Creator:: Lee, Zhong-Ping, Darecki, Miroslaw, Carder, Kendall L., Davis, Curtiss O., Stramski, Dariusz, and Rhea, W. Joseph
Abstract:: The propagation of downwelling irradiance at wavelength l from surface to a depth (z) in the ocean is governed by the diffuse attenuation coefficient, K𝒹(λ). There are two standard methods for the derivation of K𝒹(λ) in remote sensing, which both are based on empirical relationships involving the blue-to-green ratio of...
Resource Type:: Article
Full Text:: ,4 Curtiss O. Davis,5 Dariusz Stramski,6 and W. Joseph Rhea5 Received 1 July 2004; revised 18

Records of geomagnetic reversals from volcanic islands of French Polynesia 1. Paleomagnetic study of a polarity transition in a lava sequence from the island of Huahine

Creator:: Roperch, Pierrick and Duncan, Robert A.
Abstract:: We report the behavior of the earth's magnetic field for a transition recorded in lavas at the volcanic island of Huahine in French Polynesia, south-central Pacific Ocean. Detailed intermediate fields are observed that record an apparent N-N excursion. The available K-Ar ages indicate that most volcanic rocks of the southern...
Resource Type:: Article
Full Text:: French Polynesia 1. Paleomagnetic Study of a Polarity Transition in a Lava Sequence From the Island of

Origin of the Louisville ridge and its relationship to the Eltanin Fracture Zone System

Creator:: Watts, A. B., Weissel, J. K., Duncan, Robert A., and Larson, R. L.
Abstract:: We have combined shipboard and Seasat altimeter derived data in an intergrated geological and geophysical study of the Louisville Ridge; a 3500-km-long seamount chain extending from the Tonga trench to the Eltanin Fracture Zone. A break in the smooth trend of the ridge at latitude 37.5°S has been recognized in...
Resource Type:: Article
Full Text:: , 1988 Origin of the Louisville Ridge and Its Relationship to the Eltanin Fracture Zone System A. B

Effects of the legacy of axial cooling on partitioning of hydrothermal heat extraction from oceanic lithosphere

Creator:: Spinelli, G. A. and Harris, R. N.
Abstract:: Water circulating through oceanic lithosphere extracts large quantities of heat, affecting magmatic, tectonic, geochemical, and microbial processes. Numerous estimates for the amount of hydrothermal heat extraction have been made on the basis of the difference between the predicted and observed heat flux across the seafloor. These methods have assumed a...
Resource Type:: Article
Full Text:: to the first fewmillion years of lithospheric heat transport. Fisher [2003] showed that a fraction of

Records of geomagnetic reversals from volcanic islands of French Polynesia 2. Paleomagnetic study of a flow sequence (1.2-0.6 Ma) from the island of Tahiti and discussion of reversal models

Creator:: Chauvin, Annick, Roperch, Pierrick, and Duncan, Robert A.
Abstract:: A volcanic sequence almost 700 meters thick has been sampled in the Punaruu valley on the island of Tahiti, southern central Pacific Ocean. Detailed paleomagnetic results have been obtained from 123 sites. Three reversals are recorded in this sequence. Age determinations (K-Ar) indicate that the youngest reversal corresponds to the...
Resource Type:: Article
Full Text:: French Polynesia 2. Paleomagnetic Study of a Flow Sequence (1.2–0.6 Ma) From the Island

Evidence for diffuse exension of the Pacific plate from Pukapuka ridges and cross-grain gravity lineations

Creator:: Sandwell, David T., Winterer, Edward L., Mammerickx, Jacqueline, Duncan, Robert A., Lynch, Mary Ann, Levitt, Daniel A., and Johnson, Catherine L.
Abstract:: Satellite altimeter measurements of marine gravity reveal 100 to 200-km wavelength lineations over a wide area of the Pacific plate oriented roughly in the direction of absolute plate motion. At least three mechanisms have been proposed for their origin: smallscale convective rolls aligned in the direction of absolute plate motion...
Resource Type:: Article
Full Text:: , 430-443, 1991. Bonatti, E., C. G. A. Harrison, D. E. Fisher, J. Honnorez, J.-G. Schilling, J. J

Dynamics of nitrate production and removal as a function of residence time in the hyporheic zone

Creator:: Zarnetske, Jay P., Haggerty, Roy, Wondzell, Steven M., and Baker, Michelle A.
Abstract:: Biogeochemical reactions associated with stream nitrogen cycling, such as nitrification and denitrification, can be strongly controlled by water and solute residence times in the hyporheic zone (HZ). We used a whole‐stream steady state ¹⁵N‐labeled nitrate (¹⁵NO₃⁻) and conservative tracer (Cl⁻) addition to investigate the spatial and temporal physiochemical conditions controlling...
Resource Type:: Article
Full Text:: ., and S. Fisher (2003), Spatial segregation of periphyton commu- nities in a desert stream: Causes and

ScholarsArchive@OSU

Offshore controls on nearshore rip currents

Low-frequency characteristics of wave group-forced vortices

Air-water CO₂ fluxes in the microtidal Neuse River Estuary, North Carolina

Diffuse attenuation coefficient of downwelling irradiance: An evaluation of remote sensing methods.pdf

Records of geomagnetic reversals from volcanic islands of French Polynesia 1. Paleomagnetic study of a polarity transition in a lava sequence from the island of Huahine

Origin of the Louisville ridge and its relationship to the Eltanin Fracture Zone System

Effects of the legacy of axial cooling on partitioning of hydrothermal heat extraction from oceanic lithosphere

Records of geomagnetic reversals from volcanic islands of French Polynesia 2. Paleomagnetic study of a flow sequence (1.2-0.6 Ma) from the island of Tahiti and discussion of reversal models

Evidence for diffuse exension of the Pacific plate from Pukapuka ridges and cross-grain gravity lineations

Dynamics of nitrate production and removal as a function of residence time in the hyporheic zone

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