A 1.0 Myr record of glacial North Atlantic intermediate water variability from ODP Site 982 in the Northeast Atlantic

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doi: 10.1029/1998PA900013
Author(s): Venz, Kathryn A.; Hodell, David A.; Stanton, Cathy; Warnke, Detlef A.
Author Affiliation(s): Primary:
University of Florida, Department of Geology, Gainesville, FL, United States
Other:
California State University, United States
Volume Title: Paleoceanography
Source: Paleoceanography, 14(1), p.42-52. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0883-8305 CODEN: POCGEP
Note: In English. 55 refs.; illus., incl. sects.
Summary: Changes in the intermediate water structure of the North Atlantic were reconstructed using benthic foraminiferal δ13C at Ocean Drilling Program (ODP) site 982 for the past 1.0 Myr. During most terminations of the late Pleistocene, melting of icebergs and low-salinity surface waters caused production of Glacial North Atlantic Intermediate Water to cease, resulting in decreased ventilation of the middepth North Atlantic. Poor ventilation of intermediate water masses lasted well into some interglacial stages until upper North Atlantic Deep Water (NADW) production resumed under full interglacial conditions. The magnitude of benthic δ13C minima and ice-rafted debris maxima at terminations at site 982 generally match the degree of glacial suppression of NADW inferred from site 607. These processes may be related and controlled by the spatial and seasonal extent of sea ice cover during glaciations in the Nordic Seas. Copyright 1999 by the American Geophysical Union.
Year of Publication: 1999
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 24 Surficial Geology, Quaternary Geology; Atlantic Ocean; C-13/C-12; Carbon; Cenozoic; Cores; Foraminifera; Glacial sedimentation; Glaciation; Glaciomarine sedimentation; Ice rafting; Invertebrata; Isotope ratios; Isotopes; Leg 162; Marine sedimentation; Marine sediments; North Atlantic; North Atlantic Deep Water; Northeast Atlantic; O-18/O-16; ODP Site 982; Ocean Drilling Program; Ocean circulation; Oxygen; Paleo-oceanography; Paleoclimatology; Protista; Quaternary; Reconstruction; Sedimentation; Sediments; Spatial distribution; Stable isotopes
Coordinates: N573348 N573348 W0155230 W0155230
Record ID: 1999067414
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