Index Catalog // ScholarsArchive@OSU

Assessment of sea-surface temperture at 42° N in the California Current over the last 30,000 years

Creator:: Prahl, Fredrick, Pisias, Nicklas, Sparrow, Margaret A., and Sabin, Anne
Resource Type:: Article
Full Text:: Fredrick G. Prahl, Nicklas Pisias, Margaret A. Sparrow, and Anne Sabin College of Oceanic and Atmospheric

Dust, volcanic ash, and the evolution of the South Pacific Gyre through the Cenozoic

Creator:: Dunlea, Ann G., Murray, Richard W., Sauvage, Justine, Spivack, Arthur J., Harris, Robert N., and D'Hondt, Steven
Abstract:: We examine the 0–100 Ma paleoceanographic record retained in pelagic clay from the South Pacific Gyre (SPG) by analyzing 47 major, trace, and rare earth elements in bulk sediment in 206 samples from seven sites drilled during Integrated Ocean Drilling Program Expedition 329. We use multivariate statistical analyses (Q-mode factor analysis...
Resource Type:: Article
Full Text:: through the Cenozoic Dunlea, A. G., Murray, R. W., Sauvage, J., Spivack, A. J., Harris, R. N

Vanadium in foraminiferal calcite as a tracer for changes in the areal extent of reducing sediments

Creator:: Hastings, David W., Emerson, Steven R., and Mix, Alan C.
Abstract:: We have used the vanadium concentration in cleaned foraminiferal calcite as a tracer of seawater V changes in the past. Since the benthic flux of vanadium is sensitive to the redox potential of sediments, changes in the vanadium concentration of seawater should be a reflection of changes that control the...
Resource Type:: Article
Full Text:: redox state of sediments. V/Ca in G. sacculifer from an eastern equatorial Atlantic core (ENO66-17GGC

A new mechanism for Dansgaard-Oeschger cycles

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:: , P. U., S. W. Hostetler, N. G. Pisias, A. Schmittner, and K. J. Meissner (2007), Mechanisms for an ~7

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:: mass accumulation rates, the highest values (�5000 g cm�2 kyr�1) occur during the LGI prior to 16.7 cal

Planktonic foraminifera, sea surface temperatures, and mechanisms of oceanic change in the Peru and south equatorial currents, 0–150 ka BP

Creator:: Feldberg, Melissa J. and Mix, Alan C.
Abstract:: Planktonic foraminiferal faunas of the southeast Pacific indicate that sea surface temperatures (SST) have varied by as much as 8–10°C in the Peru Current, and by ~5–7°C along the equator, over the past 150,000 years. Changes in SST at times such as the Last Glacial Maximum reflect incursion of high-latitude...
Resource Type:: Article
Full Text:: –150,000 years) than previously thought [Patrick and Thunell, 1997; Pisias and Mix, 1997; Mix et al., 1999

Near collapse of the meridional SST gradient in the eastern equatorial Pacific during Heinrich Stadial 1

Creator:: Kienast, Stephanie S., Friedrich, Tobias, Dubois, Nathalie, Hill, Paul S., Timmermann, Axel, Mix, Alan C., and Kienast, Markus
Abstract:: Sea surface temperatures (SST) and inorganic continental input over the last 25,000 years (25 ka) are reconstructed in the far eastern equatorial Pacific (EEP) based on three cores stretching from the equatorial front (~0.01°N, ME0005-24JC) into the cold tongue region (~3.6°S; TR163-31P and V19-30). We revisit previously published alkenone-derived SST...
Resource Type:: Article
Full Text:: et al. [2002] and Shackleton and Pisias [1985], respectively. 4.6. LOVECLIM Earth System Model

Photosynthetic fractionation of ¹³C and concentrations of dissolved CO₂ in the central equatorial Pacific during the last 255,000 years

Creator:: Jasper, John P, Hayes, J. M., Mix, Alan C., and Prahl, Fredrick
Abstract:: Carbon isotopically based estimates of CO₂ levels have been generated from a record of the photosynthetic fractionation of ¹³C (≡εp) in a central equatorial Pacific sediment core that spans the last ~255 ka. Contents of ¹³C in phytoplanktonic biomass were determined by analysis of C37 alkadienones. These compounds are exclusive...
Resource Type:: Article
Full Text:: • and J. M. Hayes Biogeochemical Laboratories, Indiana University, Bloomington A. C. Mix and F. G

The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia

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:: at 759 cmbsf. The resulting age of N. pachyderma was 65 ± 50 years older than that of G. bulloides

Sediment size fractionation and focusing in the equatorial Pacific: Effect on ²³⁰Th normalization and paleoflux measurements

Creator:: Lyle, Mitchell, Marcantonio, Franco, Moore, Willard S., Murray, Richard W., Huh, Chih-An, Finney, Bruce P., Murray, David W., and Mix, Alan C.
Abstract:: We use flux, dissolution, and excess ²³⁰Th data from the Joint Global Ocean Flux Study and Manganese Nodule Project equatorial Pacific study Site C to assess the extent of sediment focusing in the equatorial Pacific. Measured mass accumulation rates (MAR) from sediment cores were compared to reconstructed MAR by multiplying...
Resource Type:: Article
Full Text:: performed radiochemical 214 analyses using the protocol in Huh et al [1990]. A 1-2 g sediment sample was

ScholarsArchive@OSU

Assessment of sea-surface temperture at 42° N in the California Current over the last 30,000 years

Dust, volcanic ash, and the evolution of the South Pacific Gyre through the Cenozoic

Vanadium in foraminiferal calcite as a tracer for changes in the areal extent of reducing sediments

A new mechanism for Dansgaard-Oeschger cycles

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

Planktonic foraminifera, sea surface temperatures, and mechanisms of oceanic change in the Peru and south equatorial currents, 0–150 ka BP

Near collapse of the meridional SST gradient in the eastern equatorial Pacific during Heinrich Stadial 1

Photosynthetic fractionation of ¹³C and concentrations of dissolved CO₂ in the central equatorial Pacific during the last 255,000 years

The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia

Sediment size fractionation and focusing in the equatorial Pacific: Effect on ²³⁰Th normalization and paleoflux measurements

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