Index Catalog // ScholarsArchive@OSU

Glacial greenhouse-gas fluctuations controlled by ocean circulation changes

Creator:: Schmittner, Andreas and Galbraith, Eric D.
Abstract:: Earth's climate and the concentrations of the atmospheric greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O) varied strongly on millennial timescales during past glacial periods. Large and rapid warming events in Greenland and the North Atlantic were followed by more gradual cooling, and are highly correlated with fluctuations of...
Resource Type:: Article
Full Text:: simulation shown in Figs 2 and 3. Vol 000 | 00 Month 2008 | doi:10.1038/nature07531 1 In response to

Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka

Creator:: Grachev, Alexi M., Brook, Edward J., Severinghaus, Jeffrey P., and Pisias, Nicklas G.
Abstract:: The global biogeochemical cycle of methane has received wide attention because of methane's role as a greenhouse gas. Measurements of methane in air trapped in Greenland ice cores provide a high-resolution record of methane levels in the atmosphere over the past ~100 ka, providing clues about what controls the methane...
Resource Type:: Article
Full Text:: :10.1038/366443a0. Chiang, J. C. H., M. Biasutti, and D. S. Battisti (2003), Sensitivity of the Atlantic

Leg 202 synthesis: Southeast Pacific paleoceangraphy

Creator:: Tiedemann, Ralf and Mix, Alan C.
Abstract:: Ocean Drilling Program (ODP) Leg 202 has opened a new window into understanding late Paleogene and Neogene global environmental change by providing high-quality sediment sequences from a previously unsampled region, the eastern South Pacific. Eleven sites (1232– 1242) that record variations on timescales ranging from decades to tens of millions...
Resource Type:: Article

Increased dissolved terrestrial input to the coastal ocean during the last deglaciation

Creator:: Klinkhammer, Gary P., Mix, Alan C., and Haley, B. A.
Abstract:: Here we present the first downcore results for a new paleoproxy, the Mn/Ca ratio of foraminiferal calcite, applied to sediment accumulated in the extreme Eastern Tropical North Pacific (ETNP) over the last 30,000 years. The Mn/Ca results are compared to oxygen isotopes and sea surface temperature calculated from Mg/Ca. We...
Resource Type:: Article
Full Text:: on atmospheric CO2, Nature, 415, 159–162, doi:10.1038/415159a. Anand, P., H. Elderfield, and M. H

Tropical origins of North and South Pacific decadal variability

Creator:: Shakun, Jeremy D. and Shaman, Jeffrey
Abstract:: The origin of the Pacific Decadal Oscillation (PDO), the leading mode of sea surface temperature variability for the North Pacific, is a matter of considerable debate. One paradigm views the PDO as an independent mode centered in the North Pacific, while another regards it as a largely reddened response to...
Resource Type:: Article
Full Text:: Niño anomaly, Nature, 370, 360–363, doi:10.1038/370360a0. Karoly, D. J. (1989), Southern Hemisphere

Routing of western Canadian Plains runoff during the 8.2 ka cold event

Creator:: Carlson, Anders E., Clark, Peter U., 1956-, Haley, Brian A., and Klinkhammer, Gary P.
Abstract:: The collapse of the Laurentide Ice Sheet over Hudson Bay ∼8.47 ka allowed the rapid drainage of glacial Lake Agassiz into the Labrador Sea, an event identified as causing a reduction in Atlantic meridional overturning circulation (AMOC) and the 8.2 ka cold event. Atmosphere‐ocean models simulations based on this forcing,...
Resource Type:: Article
Full Text:: lakes, Nature, 400, 344 – 348, doi:10.1038/22504. Came, R. E., D. W. Oppo, and J. F. McManus (2007

A novel method for determination of aragonite saturation state on the continental shelf of central Oregon using multi-parameter relationships with hydrographic data

Creator:: Juranek, L. W., Freely, R. A., Peterson, W. T., Alin, S. R., Hales, Burke, Lee, K., Sabine, C. L., and Peterson, J.
Abstract:: We developed a multiple linear regression model to robustly determine aragonite saturation state (Ωarag) from observations of temperature and oxygen (R² = 0.987, RMS error 0.053), using data collected in the Pacific Northwest region in late May 2007. The seasonal evolution of Ωarag near central Oregon was evaluated by applying...
Resource Type:: Article
Full Text:: :10.1038/nature04095. Park, P. K., et al. (1969), Alkalinity budget of the Columbia River, Limnol

Using tracer observations to reduce the uncertainty of ocean diapycnal mixing and climate–carbon cycle projections

Creator:: Schmittner, Andreas, Urban, Nathan M., Keller, Klaus, and Matthews, Damon
Abstract:: What is the uncertainty of climate-carbon cycle projections in response to anthropogenic greenhouse gas emissions and how can we reduce this uncertainty? We address this question by quantifying the ability of available ocean tracer observations to constrain the values of diapycnal diffusivity in the pelagic ocean (Kv), a key uncertain...
Resource Type:: Article

A latitudinal cline in the Chinook salmon (Oncorhynchus tshawytscha) Clock gene: evidence for selection on PolyQ length variants

Creator:: O'Malley, Kathleen G. and Banks, Michael A.
Abstract:: A critical seasonal event for anadromous Chinook salmon (Oncorhynchus tshawytscha) is the time at which adults migrate from the ocean to breed in freshwater. We investigated whether allelic variation at the circadian rhythm genes, OtsClock1a and OtsClock1b, underlies genetic control of migration timing among 42 populations in North America. We...
Resource Type:: Article
Full Text:: . (doi:10.1038/nature00965) Richter, A. & Kolmes, S. A. 2005 Maximum temperature limits for Chinook

A Dimensionless Invariant for Relative Size at Sex Change in Animals: Explanation and Implications

Creator:: Gardner, Andy, Allsop, David J., Charnov, Eric L., and West, Stuart A.
Abstract:: Recent comparative studies across sex-changing animals have found that the relative size and age at sex change are strikingly invariant. In particular, 91%–97% of the variation in size at sex change across species can be explained by the simple rule that individuals change sex when they reach 72% of their...
Resource Type:: Article
Full Text:: ). Nature 428, doi:10.1038/nature2513. ———. 2004b. Sex-ratio evolution in sex changing animals. Evo- lution

ScholarsArchive@OSU

Glacial greenhouse-gas fluctuations controlled by ocean circulation changes

Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka

Leg 202 synthesis: Southeast Pacific paleoceangraphy

Increased dissolved terrestrial input to the coastal ocean during the last deglaciation

Tropical origins of North and South Pacific decadal variability

Routing of western Canadian Plains runoff during the 8.2 ka cold event

A novel method for determination of aragonite saturation state on the continental shelf of central Oregon using multi-parameter relationships with hydrographic data

Using tracer observations to reduce the uncertainty of ocean diapycnal mixing and climate–carbon cycle projections

A latitudinal cline in the Chinook salmon (Oncorhynchus tshawytscha) Clock gene: evidence for selection on PolyQ length variants

A Dimensionless Invariant for Relative Size at Sex Change in Animals: Explanation and Implications

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