Delia W Oppo

Woods Hole Oceanographic Institution

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David Thornalley

University College London

Antje H L Voelker

Portuguese Sea and Atmosphere Institute

Jean Lynch‐Stieglitz

Georgia Institute of Technology

Rosemarie E Came

University of New Hampshire at Manchester

Thomas M. Marchitto

University of Colorado Boulder

Gema Martínez Méndez

University of Bremen

David C Lund

University of Connecticut

Anders E. Carlson

Oregon Research Institute

Konrad A Hughen

Woods Hole Oceanographic Institution

Janne Repschläger

Max Planck Institute for Chemistry

Cooperative Institutions

Centre National de la Recherche Scientifique

104

Woods Hole Oceanographic Institution

Rutgers, The State University of New Jersey

Pacific Northwest National Laboratory

Sorbonne Université

Laboratoire de Météorologie Dynamique

Columbia University

University of Bremen

Lamont-Doherty Earth Observatory

Chinese Academy of Sciences

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Stable carbon and oxygen isotopic compsoition of Globorotalia inflata of sediment core MD03-2699

Antje H L Voelker Teresa Rodrigues Katharina Billups Delia W Oppo Jerry F McManus

Sediment core

Carbon fibers

10.1594/pangaea.742785

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Citations (0)

Deep sea records from the southeast Labrador Sea: Ocean circulation changes and ice‐rafting events during the last 160,000 years

Paleoceanography (2003)

Tine L. Rasmussen Delia W Oppo Erik Thomsen Scott J. Lehman

Results from two deep sea cores from northeast of Newfoundland at 1251 and 2527 m water depth, respectively, indicate that during the time period from 160,000 to 10,000 years BP, ice rafting events in the Labrador Sea were accompanied by rapid variations in deep and surface water circulation. Twelve ice‐rafting events occurred, each coinciding with high concentrations of detrital carbonate and oxygen isotopic depletion of both surface and bottom waters. Eleven of these can be correlated with the North Atlantic Heinrich events H1–H11. The remaining very conspicuous ice‐rafting event took place early in MIS substage 5e, at a time when the planktic faunal assemblage suggests marked warming of the sea surface. In the shallower core, benthic δ 13 C values rise from a minimum during the deglaciation to peak substage 5e values following the last ice‐rafting event, indicating that the ventilation of intermediate depths was renewed after the deglaciation was complete and continued throughout substage 5e. The benthic foraminifera suggest that this well‐ventilated water mass was comparable to the modern Labrador Sea Water (LSW). The benthic faunas suggest that a relatively warm intermediate water mass entered the SE Labrador Sea during Heinrich events. Generally low benthic δ 13 C values indicate that this water mass was poorly ventilated and rich in inorganic nutrients. Isotope data and benthic faunal distributions indicate that North Atlantic Deep Water (NADW) formed in the Norwegian‐Greenland Sea reached the SE Labrador Sea between the Heinrich events.

Deglaciation

Ice core

Circumpolar deep water

10.1029/2001pa000736

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Citations (99)

Paired benthic foraminiferal Cd/Ca and Zn/Ca evidence for a greatly increased presence of Southern Ocean Water in the glacial

North Atlantic Thomas M. Marchitto Delia W Oppo William B Curry

paleoceanography

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(Table S3) Epsilon-Nd data of planktic foraminifera, decarbonated leachates and the detrital fraction of sediment core GeoB2104-3

Jacob N W Howe Alexander M Piotrowski Delia W Oppo Kuo‐Fang Huang Stefan Mulitza

Sediment core

Table (database)

Fraction (chemistry)

10.1594/pangaea.874863

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Citations (0)

A 0.5-Million-Year Record of Millennial-Scale Climate Variability in the North Atlantic

Science (1999)

Jerry F McManus Delia W Oppo James L. Cullen

Long, continuous, marine sediment records from the subpolar North Atlantic document the glacial modulation of regional climate instability throughout the past 0.5 million years. Whenever ice sheet size surpasses a critical threshold indicated by the benthic oxygen isotope (delta18O) value of 3.5 per mil during each of the past five glaciation cycles, indicators of iceberg discharge and sea-surface temperature display dramatically larger amplitudes of millennial-scale variability than when ice sheets are small. Sea-surface temperature oscillations of 1 degrees to 2 degreesC increase in size to approximately 4 degrees to 6 degreesC, and catastrophic iceberg discharges begin alternating repeatedly with brief quiescent intervals. The glacial growth associated with this amplification threshold represents a relatively small departure from the modern ice sheet configuration and sea level. Instability characterizes nearly all observed climate states, with the exception of a limited range of baseline conditions that includes the current Holocene interglacial.

Iceberg

Ice core

Greenland ice sheet

Ice-sheet model

Temperature record

10.1126/science.283.5404.971

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Citations (903)

Quantitative Reconstruction of Glacial/Interglacial Carbonate Ion Concentrations in the Deep Pacific Using Zn and Cd in Benthic Foraminifera

AGUFM (2001)

Thomas M. Marchitto Jean Lynch‐Stieglitz William B Curry Delia W Oppo

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