Index Catalog // ScholarsArchive@OSU

Oxygen production and carbon sequestration in an upwelling coastal margin

Creator:: Hales, Burke, Karp-Boss, Lee, Perlin, Alexander, and Wheeler, Patricia A.
Abstract:: We examined high-resolution cross-shelf distributions of particulate organic carbon (POC) and dissolved O₂ during the upwelling season off the Oregon coast. Oxygen concentrations were supersaturated in surface waters, and hypoxic in near-bottom waters, with greatly expanded hypoxic conditions late in the season. Simplified time-dependent mass balances on cross-shelf integrated concentrations...
Resource Type:: Article
Full Text:: upwelling coastal margin Burke Hales,1 Lee Karp-Boss,2 Alexander Perlin,1 and Patricia A. Wheeler1

Form Drag and Mixing Due to Tidal Flow past a Sharp Point

Creator:: Edwards, Kathleen A., MacCready, Parker, Moum, James N., Pawla, Geno, Klymak, Jody M., and Perlin, Alexander
Abstract:: Barotropic tidal currents flowing over rough topography may be slowed by two bottom boundary–related processes: tangential stress of the bottom boundary layer, which is generally well represented by a quadratic drag law, and normal stress from bottom pressure, known as form drag. Form drag is rarely estimated from oceanic observations...
Resource Type:: Article
Full Text:: , Honolulu, Hawaii JODY M. KLYMAK AND ALEXANDER PERLIN College of Ocean and Atmospheric Sciences, Oregon

Distribution and variability of iron input to Oregon coastal waters during the upwelling season

Creator:: Chase, Zanna, Hales, Burke, Cowles, Timothy J., Schwartz, Roseanne, and van Geen, Alexander
Abstract:: We measured iron concentrations off the Oregon coast in spring (May–June) and summer (August) of 2001 as part of the Coastal Ocean Advances in Shelf Transport (COAST) program. Dissolvable and total dissolvable iron levels in surface waters were generally higher in spring (mean of 2.1 and 33.9 nmol L¯¹, respectively)...
Resource Type:: Article
Full Text:: Schwartz and Alexander van Geen Lamont Doherty Earth Observatory of Columbia University, Palisades, New

Particle resuspension in the Columbia River plume near field

Creator:: Spahn, Emily Y., Homer-Devine, Alexander R., Nash, Jonathan, Jay, David A., and Kilcher, Levi
Abstract:: Measurements of suspended sediment concentration, velocity, salinity, and turbulent microscale shear in the near-field region of the Columbia River plume are used to investigate the mechanisms of sediment resuspension and entrainment into the plume. An east-west transect was occupied during spring and neap tide periods in August 2005 and May...
Resource Type:: Article
Full Text:: near field Emily Y. Spahn,1 Alexander R. Horner-Devine,1 Jonathan D. Nash,2 David A. Jay,3 and Levi

Assimilation of moored velocity data in a model of coastal wind-driven circulation off Oregon: Multivariate capabilities

Creator:: Kurapov, Alexander, Allen, John S., Egbert, Gary D., Miller, Robert N., Kosro, P. Michael, Levine, Murray D., and Barth, John A.
Abstract:: Horizontal current measurements from an array of moored acoustic Doppler profilers are assimilated sequentially into a model of coastal wind-driven circulation off Oregon during the upwelling season of May–August 2001. Model results are compared against independent moored and ship survey data to document a positive effect of velocity data assimilation...
Resource Type:: Article
Full Text:: coastal wind-driven circulation off Oregon: Multivariate capabilities Alexander L. Kurapov, J. S. Allen

A nested grid model of the Oregon Coastal Transition Zone: Simulations and comparisons with observations during the 2001 upwelling season

Creator:: Springer, S. R., Samelson, Roger M., Allen, John S., Egbert, Gary D., Kurapov, Alexander, Miller, Robert N., and Kindle, J. C.
Abstract:: The Oregon Coastal Transition Zone (OCTZ) extends several hundred kilometers offshore where shelf flows interact with the northern California Current. A primitive-equation numerical ocean model is used to study the upwelling circulation in this region from 1 May to 1 November 2001. This OCTZ model obtains initial and boundary conditions...
Resource Type:: Article
Full Text:: south- west of Cape Blanco that arises during upwelling-favorable winds [Samelson et al., 2002; Perlin

Dissipative Losses in Nonlinear Internal Waves Propagating across the Continental Shelf

Creator:: Moum, J. N., Farmer, D. M., Shroyer, E. L., Smyth, W. D., and Armi, L.
Abstract:: A single nonlinear internal wave tracked more than 100 wavelengths across Oregon’s continental shelf over a 12-h period exhibited nearly constant wave speed, c = 0.75 m s⁻¹, and amplitude, a = 15 m. The wavelength L gradually decreased from 220 m in 170-m water depth to 60 m in...
Resource Type:: Article
Full Text:: Nash, Alexander Perlin, and Greg Avicola for comments on an early draft. REFERENCES Chang, M.-H., R

Internal solitary waves of elevation advancing on a shoaling shelf

Creator:: Klymak, Jody M. and Moum, James N.
Abstract:: A sequence of three internal solitary waves of elevation were observed propagating shoreward along a near-bottom density interface over Oregon’s continental shelf. These waves are highly turbulent and coincide with enhanced optical backscatter, consistent with increased suspended sediments in the bottom boundary layer. Nonlinear solitary wave solutions are employed to...
Resource Type:: Article
Full Text:: /V Revelle. Kevin Lamb and Bill Smyth provided code and theoretical advice. Alexander Perlin

Anomalously warm July 2005 in the northern California Current : historical context and the significance of cumulative wind stress

Creator:: Pierce, Stephen D., Barth, John A., Thomas, Rebecca E., and Fleischer, Guy W.
Abstract:: In the northern California Current, the onset of the 2005 upwelling season was five weeks later than usual, and well established upwelling with a cold surface signature did not occur until about seven weeks after this. As part of the joint US-Canada Pacific hake survey, from 14–16 July 2005 we...
Resource Type:: Article
Full Text:: . Perlin, R. L. Smith, and P. A. Wheeler (2005), Two coastal upwelling domains in the northern California

Modeling Bottom Mixed Layer Variability on the Mid-Oregon Shelf during Summer Upwelling

Creator:: Kurapov, A. L., Allen, J. S., Egber, G. D., and Miller, R. N.
Abstract:: Results from a model of wind-driven circulation are analyzed to study spatial and temporal variability in the bottom mixed layer (BML) on the mid-Oregon shelf in summer 2001. The model assimilates acoustic Doppler profiler velocities from two cross-shore lines of moorings 90 km apart to provide improved accuracy of near-bottom...
Resource Type:: Article
Full Text:: and temporal coverage of the Corresponding author address: Dr. Alexander Kurapov, COAS, Oregon State

ScholarsArchive@OSU

Oxygen production and carbon sequestration in an upwelling coastal margin

Form Drag and Mixing Due to Tidal Flow past a Sharp Point

Distribution and variability of iron input to Oregon coastal waters during the upwelling season

Particle resuspension in the Columbia River plume near field

Assimilation of moored velocity data in a model of coastal wind-driven circulation off Oregon: Multivariate capabilities

A nested grid model of the Oregon Coastal Transition Zone: Simulations and comparisons with observations during the 2001 upwelling season

Dissipative Losses in Nonlinear Internal Waves Propagating across the Continental Shelf

Internal solitary waves of elevation advancing on a shoaling shelf

Anomalously warm July 2005 in the northern California Current : historical context and the significance of cumulative wind stress

Modeling Bottom Mixed Layer Variability on the Mid-Oregon Shelf during Summer Upwelling

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