Index Catalog // ScholarsArchive@OSU

Effective attenuation lengths of cosmic rays producing ¹⁰Be and ²⁶Al in quartz: Implications for exposure age dating

Creator:: Brown, Erik Thorson, Brook, Edward J., Raisbeck, Grant M., Yiou, Francoise, and Kurz, Mark D.
Abstract:: We have measured cosmic ray produced ¹⁰Be (t₁/₂ = 1.5 My) and ²⁶Al (t₁/₂ = 0.72 My) as functions of depth in a core of quartz sandstone bedrock collected in South Victoria Land, Antarctica. These data were used to place limits on the exposure age and erosion rate of the...
Resource Type:: Article
Full Text:: Copyright 1992 by the American Geophysical Union. Paper number 92GI.1)0266 0094-8534/92/92GL-00266503.00

On the late-time behavior of tracer test breakthrough curves

Creator:: Haggerty, Roy, McKenna, Sean A., and Meigs, Lucy C.
Abstract:: We investigated the late-time (asymptotic) behavior of tracer test breakthrough curves (BTCs) with rate-limited mass transfer( e.g., in dual-porosity or multiporosity systems) and found that the late-time concentration c is given by the simple expression C = tₐ𝒹{C₀g-- [m₀(∂g/∂t)]}, for t >> tₐ𝒹 and tα >> tₐ𝒹, where tad is...
Resource Type:: Article
Full Text:: Copyright 2000 by the American Geophysical Union. Paper number 2000WR900214. 0043-1397/00

Productivity and sedimentary delta N-15 variability for the last 17,000 years along the northern Gulf of Alaska continental slope

Creator:: Addison, Jason A., Finney, Bruce P., Dean, Walter E., Davies, Maureen H., Mix, Alan C., Stoner, Joseph S., and Jaeger, John M.
Abstract:: Biogenic opal, organic carbon, organic matter stable isotope, and trace metal data from a well-dated, high-resolution jumbo piston core (EW0408–85JC; 59° 33.3′N, 144° 9.21′W, 682 m water depth) recovered from the northern Gulf of Alaska continental slope reveal changes in productivity and nutrient utilization over the last 17,000 years. Maximum...
Resource Type:: Article
Full Text:: Florida, Gainesville, Florida, USA. Copyright 2012 by the American Geophysical Union. 0883-8305/12

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:: Ecology Center, Utah State University, Logan, Utah, USA. Copyright 2011 by the American Geophysical Union

Low-pressure phase equilibria of anhydrous anorthite-bearing mafic magmas

Creator:: Kohut, Edward J. and Nielsen, Roger L.
Abstract:: One of the most persistent questions regarding the phase equilibria of mid-ocean ridge basalts (MORB) pertains to the petrogenesis of the anorthitic plagioclase phenocrysts (>An₉₀) that are characteristic of the more primitive members of such suites. Anorthitic phenocrysts are present in many if not most MORB suites in spite of...
Resource Type:: Article
Full Text:: Copyright 2003 by the American Geophysical Union 1 of 27 Kohut, E. J., and R. L. Nielsen, Low-pressure

An empirical algorithm for light absorption by ocean water based on color

Creator:: Lee, Z. P., Carder, K. L., Steward, R. G., Peacock, T. G., Davis, C. O., and Patch, J. S.
Abstract:: Empirical algorithms for the total absorption coefficient and absorption coefficient by pigments for surface waters at 440 nm were developed by applying a quadratic formula that combines two spectral ratios of remote-sensing reflectance. For total absorption coefficients ranging from 0.02 to 2.0 m⁻¹, a goodness of fit was achieved between...
Resource Type:: Article
Full Text:: - Copyright 1998 by the American Geophysical Union. Paper number 98JC01946. 0148-0227/98/98J C-01946509.00

An interlaboratory comparison of techniques for extracting and analyzing trapped gases in ice cores

Creator:: Sowers, Todd, Brook, Edward J., Etheridge, David, Blunier, Thomas, Fuchs, Andreas, Leuenberger, Markus, Chappellaz, Jerome, Barnola, Jean Marc, Wahlen, Martin, Deck, Bruce, and Weyhenmeyer, Connie
Abstract:: We undertook an interlaboratory comparison of techniques used to extract and analyze trapped gases in ice cores. The intercomparison included analyses of standard reference gases and samples of ice from the Greenland Ice Sheet Project 2 (GISP2) site. Concentrations of CO₂, CH₄, the δ¹⁸O of O₂, the δ¹⁵N of N₂,...
Resource Type:: Article
Full Text:: Jolla. Copyright 1997 by the American Geophysical Union. Paper number 97JC00633. 0148-0227/97/97JC

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:: . Copyright 2005 by the American Geophysical Union. 0148-0227/05/2004JC002573 C02017 1 of 9 promising but

Labile dissolved organic carbon supply limits hyporheic denitrification

Creator:: Zarnetske, Jay P., Haggerty, Roy, Wondzell, Steven M., and Baker, Michelle A.
Abstract:: We used an in situ steady state ¹⁵N-labeled nitrate (¹⁵NO₃⁻) and acetate (AcO⁻) well-to-wells injection experiment to determine how the availability of labile dissolved organic carbon (DOC) as AcO⁻ influences microbial denitrification in the hyporheic zone of an upland (third-order) agricultural stream. The experimental wells receiving conservative (Cl⁻ and Br)...
Resource Type:: Article
Full Text:: . Copyright 2011 by the American Geophysical Union. 0148-0227/11/2011JG001730 JOURNAL OF GEOPHYSICAL RESEARCH

Evolution of sediment accommodation space in steady state bedrock-incising valleys subject to episodic aggradation

Creator:: Lancaster, Stephen T.
Abstract:: Steepland valleys subject to debris flows incise bedrock even as episodic deposition typically covers valley bottoms. This paper’s hypothesis is that, while continual fluvial processes evacuate deposits, storage of episodic deposition drives valley widening and, thereby, creation of accommodation space for sediment storage on the valley floor. Data from three...
Resource Type:: Article
Full Text:: State University, Corvallis, Oregon, USA. Copyright 2008 by the American Geophysical Union. 0148-0227

ScholarsArchive@OSU

Effective attenuation lengths of cosmic rays producing ¹⁰Be and ²⁶Al in quartz: Implications for exposure age dating

On the late-time behavior of tracer test breakthrough curves

Productivity and sedimentary delta N-15 variability for the last 17,000 years along the northern Gulf of Alaska continental slope

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

Low-pressure phase equilibria of anhydrous anorthite-bearing mafic magmas

An empirical algorithm for light absorption by ocean water based on color

An interlaboratory comparison of techniques for extracting and analyzing trapped gases in ice cores

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

Labile dissolved organic carbon supply limits hyporheic denitrification

Evolution of sediment accommodation space in steady state bedrock-incising valleys subject to episodic aggradation

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