Evidence for early warming and cooling in North Atlantic surface waters during the last interglacial

Bauch, Henning and Kandiano, Evgeniya (2007) Evidence for early warming and cooling in North Atlantic surface waters during the last interglacial Paleoceanography, 22 (PA1201). DOI 10.1029/2005PA001252.

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In-depth analysis of planktic foraminiferal census data paired with δ18O records of specific indicator species provides new insight into the surface ocean evolution of the northeast Atlantic during the previous interglacial warm period (oxygen isotope stage (OIS) 5e). Full interglacial conditions existed at the study site for a maximum of only 8 kyr, between 125 and 117 ka. Highest sea surface temperatures (SSTs) occurred during early OIS 5e concomitant with high summer insolation but after the main phase of ice sheet melting of the preceding glaciation (Saalian). This early peak SST interval is marked by the appearance of tropical-subtropical species and lasted for 4 kyr until 121 ka, as corroborated by a major change in planktic δ18O. Relative stability in global ice volume continued for another 3–4 kyr before SSTs dropped further toward the next stadial. During early OIS 5e the situation of the surface water vertical structure appears to have been different from the early Holocene. For OIS 5e it is therefore suggested that the particular melting history of late Saalian ice had a long-lasting and profound effect on both postdeglacial surface water mass configuration in the North Atlantic and heat-moisture transfer into Europe.

Document Type: Article
Keywords: North Atlantic paleoceanography, Last interglacial, sea surface temperatures
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
DOI etc.: 10.1029/2005PA001252
ISSN: 0883-8305
Date Deposited: 03 Dec 2008 16:51
Last Modified: 10 May 2017 08:20
URI: http://eprints.uni-kiel.de/id/eprint/3553

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