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Climatic Record in North Atlantic Deep-Sea Core V23-82: Comparison of the Last and Present Interglacials Based on Quantitative Time Series

Published online by Cambridge University Press:  20 January 2017

Constance Sancetta ,
John Imbrie ,
N.G. Kipp ,
Andrew McIntyre  and
W.F. Ruddiman
Constance Sancetta
Affiliation:
Department of Geol. Sci., Brown University, Providence, Rhode Island 02912 USA.
John Imbrie
Affiliation:
Department of Geol. Sci., Brown University, Providence, Rhode Island 02912 USA.
N.G. Kipp
Affiliation:
Department of Geol. Sci., Brown University, Providence, Rhode Island 02912 USA.
Andrew McIntyre
Affiliation:
Lamont-Doherty Geological Observatory of Columbia University, Palisades, NY 10964, and Dept. Earth and Environmental Sciences, Queens College of C.U.N.Y., NY 11367
W.F. Ruddiman
Affiliation:
United States Naval Oceanographic Office, Chesapeake Beach, Maryland 20732
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Abstract

In North Atlantic deep-sea core V23-82, changing surface water conditions are revealed by changing composition of fauna and flora. Sedimentation rate seems to vary little so that approximate dating of climatic events within the X zone of Ericson is possible. These include an interglacial temperature maximum at 124,000 YBP; start of the post-Eemian cooling at about 116,000 YBP; and peak cool conditions at about 110,000 YBP, followed by warming.

Drop in summer and winter temperatures about two-thirds of the way towards full glacial values and a significant drop of salinity is suggested by quantitative paleoenvironmental analysis of the 110,000 YBP cold episode.

If the Eemian is taken as the analog of the present interglacial, a point in time 116,000 YBP becomes the historical model for today's ocean, and the North Atlantic is now approaching a time of severe cooling.

Type
Original Articles
Information
Quaternary Research , Volume 2 , Issue 3 , November 1972 , pp. 363 - 367
Copyright
Academic Press, Inc.

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