Index Catalog // ScholarsArchive@OSU

Creator:: Petersen, S. V., Schrag, D. P., and Clark, P. U.
Abstract:: We present a new hypothesis to explain the millennial-scale temperature variability recorded in ice cores known as Dansgaard-Oeschger (DO) cycles. We propose that an ice shelf acted in concert with sea ice to set the slow and fast timescales of the DO cycle, respectively. The abrupt warming at the onset...
Resource Type:: Article
Full Text:: . Sci., 24(3), 279–293, doi:10.1002/jqs.1231. Flückiger, J., T. Blunier, B. Stauffer, J. Chappellaz, R

Creator:: Davies, M. H., Mix, A. C., Stoner, J. S., Addison, J. A., Jaeger, J., Finney, B., and Wiest, J.
Abstract:: Oxygen isotope data from planktonic and benthic foraminifera, on a high-resolution age model (44 ¹⁴C dates spanning 17,400 years), document deglacial environmental change on the southeast Alaska margin (59°33.32′N, 144°9.21′W, 682 m water depth). Surface freshening (i.e., δ¹⁸O reduction of 0.8‰) began at 16,650 ± 170 cal years B.P. during...
Resource Type:: Article
Full Text:: ‐related dia- toms (B. fragilis, F. cylindrus, F. oceanica, T. gravida, and T. hyalina) is also plotted

Creator:: Pichevin, Laetitia, Ganeshram, Raja S., Reynolds, Ben C., Prahl, Fredrick, Pedersen, Thomas F., Thunell, Robert, and McClymont, Erin L.
Abstract:: Iron is considered to play a large role in the cycling of Si in Fe-limited regions of the ocean, but little is known about its role in Si biogeochemistry outside these areas. Here, we present published sediment trap data, new nutrient profiles and high resolution sedimentary records (Si isotopes, Biogenic...
Resource Type:: Article
Full Text:: short timescales. Citation: Pichevin, L., R. S. Ganeshram, B. C. Reynolds, F. Prahl, T. F. Pedersen, R

Creator:: Schmittner, Andreas, Galbraith, Eric D., Hostetler, Steven W., Pedersen, Thomas F., and Zhang, Rong
Abstract:: Paleoclimate records from glacial Indian and Pacific oceans sediments document millennial-scale fluctuations of subsurface dissolved oxygen levels and denitrification coherent with North Atlantic temperature oscillations. Yet the mechanism of this teleconnection between the remote ocean basins remains elusive. Here we present model simulations of the oxygen and nitrogen cycles that...
Resource Type:: Article
Full Text:: biogeochemical cycles even in remote areas. Citation: Schmittner, A., E. D. Galbraith, S. W. Hostetler, T. F

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