Implications of stratigraphic and paleoclimatic records of the last interglaciation from the Nordic Seas.

Bauch, Henning A., Erlenkeuser, Helmut, Grootes, Pieter M. and Jouzel, Jean (1996) Implications of stratigraphic and paleoclimatic records of the last interglaciation from the Nordic Seas. Quaternary Research, 46 (3). pp. 260-269. DOI 10.1006/qres.1996.0065.

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Abstract

Climatic reconstruction of glacial to interglacial episodes from oxygen isotopes in sediment cores from the Nordic seas is complicated by strong local meltwater contributions to the oxygen isotope changes. Combination of benthic and planktic foraminiferal isotope data with foraminiferal abundances and ice-rafted debris (IRD) allows separation of local and global effects and subdivision of the marine oxygen isotope events 6.2–5.4, which include the last interglaciation, into: (1) a meltwater phase after glacial stage 6, recorded by large amounts of IRD and low foraminiferal abundance, indicating surface water warming; (2) an IRD-free period with high deposition rates of subpolar foraminifera and other CaCO3pelagic components, recognized here as the “full” interglaciation; and (3) a phase with the recurrence of IRD and the demise of subpolar species. Comparison of ice-core records and marine data implies that the global climate during the last full interglaciation and that during the postdeglacial Holocene were similar. The records show no significantly different variations in the proxy data. In contrast, the oxygen isotopes of planktic foraminifera and ice cores indicate significant differences during each of the deglacial transitions (Terminations I and II) that preceded these two interglaciations. These suggest that during Termination II the climatic evolution in the Nordic seas was less affected by abrupt changes in ocean–atmosphere circulation than during the last glacial to interglacial transition.

Document Type: Article
Keywords: Holocene; Last Interglacial; Global climate; Paleoclimate; Oxygen isotopes; Nordic Seas
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1006/qres.1996.0065
ISSN: 0033-5894
Projects: SFB313
Date Deposited: 23 Mar 2015 09:50
Last Modified: 02 Feb 2017 11:04
URI: http://oceanrep.geomar.de/id/eprint/28200

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