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North Atlantic Paleoceanography: The Last Five Million Years

Creator:: Stein, Ruediger, Kanamatsu, Toshiya, Alvarez-Zarikian, Carlos, Higgins, Sean M., Channell, Jim E. T., Aboud, Essam, Ohno, Masao, Acton, Gary D., Akimoto, Kazumi, Bailey, Ian, Bjorklund, Kjell R., Evans, Helen, Neilsen, Simmon H. H., Ferretti, Partizia, Gruetzner, Jean, Hagino, Kentaro, Harris, Robert N., Hatakeda, Kentaro, Hefter, Jens, Judge, Shelley A., Kullanek, Denise K., Nanayama, Futoshi, Rashid, Harunur, Sierro Sanchez, Francisco J., Voelker, Antje, and Zhai, Qiumin
Abstract:: In the North Atlantic, cold, relatively salty water sinks in the icy Labrador and Greenland seas, forming North Atlantic Deep Water (NADW). This circulates through the global ocean, driving ocean overturning and global heat transport and, thus, impacting global climate. As one of the most climatically sensitive regions on Earth,...
Resource Type:: Article
Full Text:: succession of the last six million years North Atlantic Paleoceanography: The Last Five Million Years PAGES

Refinement of a high-resolution, continuous sedimentary section for studying Equatorial Pacific Ocean paleoceanography, Leg 138

Creator:: Hagelberg, T. K., Pisias, Nicklas G., Shackleton, N. J., Mix, Alan C., and Harris, Sara E.
Abstract:: Ocean Drilling Program (ODP) Leg 138 was designed to study the late Neogene paleoceanography of the equatorial Pacific Ocean at time scales of thousands to millions of years. Crucial to this objective was the acquisition of continuous, high-resolution sedimentary records. It is well known that between successive advanced piston corer...
Resource Type:: Article
Full Text:: , CONTINUOUS SEDIMENTARY SECTION FOR STUDYING EQUATORIAL PACIFIC OCEAN PALEOCEANOGRAPHY, LEG 1381 T.K

Paleoceanography of the Eastern Equatorial Pacific during the Neogene : synthesis of Leg 138 drilling results

Creator:: Pisias, Nicklas G., Mayer, Larry A., and Mix, Alan C.
Abstract:: The primary objective of Leg 138 was to provide detailed information about the ocean's response to global climate change during the Neogene. Two north south transects were drilled (95° and 110°W) within the region of equatorial divergence driven upwelling (and thus high accumulation rates and resolution) and spanning the major...
Resource Type:: Article
Full Text:: the Ocean Drilling Program, Scientific Results, Vol. 138 1. PALEOCEANOGRAPHY OF THE EASTERN

Late Quaternary paleoceanography in the Eastern Equatorial Pacific Ocean from Planktonic Foraminifiers : a high-resolution record from Site 846

Creator:: Mix, Alan C., Le, J., and Shackleton, N. J.
Abstract:: High-resolution records of δ¹⁸0 and relative abundances of planktonic foraminifers were generated for ODP Leg 138 Site 846 for the past 800 k.y., with an average sampling interval of 3.6 k.y. The time scale was constructed by correlating the benthic δ¹⁸0 record to the SPECMAP and ODP Site 677 δ¹⁸0...
Resource Type:: Article
Full Text:: the Ocean Drilling Program, Scientific Results, Vol. 138 33. LATE QUATERNARY PALEOCEANOGRAPHY IN THE

Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water Subduction: Paleoceanography

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:: , Paleoceanography, 22, XXXXXX, doi:10.1029/2006PA001384. 28 1. Introduction 29 [2] Profound and rapid climatic

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:: ; 4267 Oceanography: General: Paleoceanography; 4516 Oceanography: Physical: Eastern boundary currents

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:: , Paleoceanography, 28, 24–30, doi:10.1029/2012PA002364. 1. Introduction [2] During the last glacial period, the

Interlaboratory comparison study of calibration standards for foraminiferal Mg/Ca thermometry

Creator:: Greaves, M., Caillon, N., Rebaubier, H., Bartoli, G., Boharty, S., Cacho, I., Clarke, L., Cooper, M., Daunt, C., Delaney, M., deMenocal, P., Dutton, A., Eggins, S., Elderfield, H., Garbe-Schoenberg, D., Goddard, E., Green, D., Groeneveld, J., Hastings, D., Hathorne, E., Kimoto, K., Klinkhammer, Gary P., Labeyrie, L., Lea, D. W., Marchitto, T., Martinez-Boti, M. A., Mortyn, P. G., Ni, Y., Nuernberg, D., Paradis, G., Pena, L., Quinn, T., Rosenthal, Y., Russell, A., Sagawa, T., Sosdian, S., L., Stott, Tachikawa, K., Tappa, E., Thunell, R., and Wilson, P. A.
Abstract:: An interlaboratory study of Mg/Ca and Sr/Ca ratios in three commercially available carbonate reference materials (BAM RS3, CMSI 1767, and ECRM 752-1) was performed with the participation of 25 laboratories that determine foraminiferal Mg/Ca ratios worldwide. These reference materials containing Mg/Ca in the range of foraminiferal calcite (0.8 mmol/mol to...
Resource Type:: Article
Full Text:: ; paleoceanography; carbonates. Index Terms: 4825 Oceanography: Biological and Chemical: Geochemistry; 4875

Evaluation of automated flow-through time-resolved analysis of foraminifera for Mg/Ca paleothermometry

Creator:: Klinkhammer, Gary P., Haley, Brian A., Mix, Alan C., Benway, H. M., and Cheseby, M.
Abstract:: The primary Mg/Ca ratio of foraminiferal shells is a potentially valuable paleoproxy for sea surface temperature (SST) reconstructions. However, the reliable extraction of this ratio from sedimentary calcite assumes that we can overcome artifacts related to foraminiferal ecology and partial dissolution, as well as contamination by secondary calcite and clay....
Resource Type:: Article
Full Text:: techniques; 4267 Oceanography: General: Paleoceanography; 4299 Oceanography: General: General or

Climatically driven changes in oceanic processes throughout the equatorial Pacific

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
Full Text:: : Paleoceanography; 4558 Oceanography: Physical: Sediment transport; 4863 Oceanography: Biological and Chemical

ScholarsArchive@OSU

North Atlantic Paleoceanography: The Last Five Million Years

Refinement of a high-resolution, continuous sedimentary section for studying Equatorial Pacific Ocean paleoceanography, Leg 138

Paleoceanography of the Eastern Equatorial Pacific during the Neogene : synthesis of Leg 138 drilling results

Late Quaternary paleoceanography in the Eastern Equatorial Pacific Ocean from Planktonic Foraminifiers : a high-resolution record from Site 846

Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water Subduction: Paleoceanography

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

A new mechanism for Dansgaard-Oeschger cycles

Interlaboratory comparison study of calibration standards for foraminiferal Mg/Ca thermometry

Evaluation of automated flow-through time-resolved analysis of foraminifera for Mg/Ca paleothermometry

Climatically driven changes in oceanic processes throughout the equatorial Pacific

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