Index Catalog // ScholarsArchive@OSU

Creator:: Paytan, Adina, Lyle, Mitchell, Mix, Alan C., and Chase, Zanna
Abstract:: The mass accumulation rates of sedimentary components (carbonate, organic carbon, opal, barite, reactive phosphate, iron, terrigenous minerals, etc.) are used in many paleoceanographic reconstructions to learn about temporal and spatial changes in surficial Earth processes including wind stress and direction, oceanic circulation, weathering rates, marine productivity and ecosystem structure, climate...
Resource Type:: Article

Creator:: Wetz, Michael S., Hales, Burke, Chase, Zanna, Wheeler, Patricia A., and Whitney, Michael M.
Abstract:: Three cross‐shelf transects were conducted off northern Oregon in February, 2003, coincident with flooding of Coast Range rivers, to assess the riverine impact on coastal ocean biogeochemistry. During downwelling conditions, low salinity river‐influenced water was located in a narrow band near the coast and contained elevated macronutrient, iron, and organic...
Resource Type:: Article

Creator:: Francois, Roger, Frank, Martin, Rutgers van der Loeff, Michiel, Bacon, Michael P., Geibert, Walter, Kienast, Stephanie, Anderson, Robert F., Bradtmiller, Louisa, Chase, Zanna, Henderson, Gideon, Marcantonio, Franco, and Allen, Susan E.
Abstract:: Accurately estimating the vertical flux of material reaching the seafloor from the overlying surface waters is essential for the paleoceanographic reconstruction of a wide variety of oceanic processes. Two approaches are currently being used. One consists of estimating mass accumulation rates (MAR) between dated horizons as the product of linear...
Resource Type:: Article

Creator:: Johnson, Kenneth S., Berelson, William M., Boss, Emmanuel S., Chase, Zanna, Claustre, Herve, Emerson, Steven R., Gruber, Nicolas, Kortzinger, Arne, Perry, Mary Jane, and Riser, Stephen C.
Abstract:: Chemical and biological sensor technologies have advanced rapidly in the past five years. Sensors that require low power and operate for multiple years are now available for oxygen, nitrate, and a variety of bio-optional properties that serve as proxies for important components of the carbon cycle (e.g., particulate organic carbon)....
Resource Type:: Article

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)...
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Creator:: Chase, Zanna, Strutton, Peter G., and Hales, Burke
Abstract:: A poleward increase in phytoplankton biomass along the West Coast of North America has been attributed to increasing river runoff towards the north. We combine streamflow and shelf width data with satellite-derived estimates of phytoplankton biomass to quantify the relationship between these variables. We find that a combination of winter...
Resource Type:: Article

Creator:: Chase, Zanna, van Geen, Alexander, Kosro, P. Michael, 1951-, Marra, John, and Wheeler, Patricia A.
Abstract:: The relationship between iron and nitrate concentrations was examined off the coast of Oregon during the upwelling season. Surface Fe and N (nitrate + nitrite) concentrations measured underway by flow injection analysis ranged from <0.3 to 20 nmol L¯¹ and <0.1 to 30 mmol L¯¹, respectively. Total dissolvable Fe concentrations,...
Resource Type:: Article

Creator:: Chen, Ying, Paytan, Adina, Chase, Zanna, Measures, Christopher, Beck, Aaron J., Sañudo-Wilhelmy, Sergio A., and Post, Anton F.
Abstract:: We present the first comprehensive investigation of the concentrations, fluxes and sources of aerosol trace elements over the Gulf of Aqaba. We found that the mean atmospheric concentrations of crustally derived elements such as Al, Fe and Mn (1081, 683, and 16.7 ng m¯³) are about 2–3 times higher than...
Resource Type:: Article

Creator:: Chase, Zanna, Paytan, Adina, Johnson, Kenneth S., Street, Joseph, and Chen, Ying
Abstract:: The Gulf of Aqaba, northern Red Sea, is an ideal natural laboratory for studying the impact of atmospheric dry deposition of iron to the ocean surface. We have measured atmospheric iron deposition weekly for 18 months, and dissolved and total dissolvable iron concentrations in the stratified summer (August) and well-mixed...
Resource Type:: Article

Creator:: Cullen, Jay T., Chase, Zanna, Coale, Kenneth H., Fitzwater, Steve E., and Sherrell, Robert M.
Abstract:: There is considerable interest in the biogeochemical cycling of cadmium (Cd) and phosphate (PO4) in surface waters, driven in part by the ongoing development of a paleonutrient proxy that utilizes Cd preserved in fossil planktonic foraminifera to determine past PO4 utilization efficiencies in ocean surface waters. The present article reports...
Resource Type:: Article

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