Deep water provenance and dynamics of the (de)glacial Atlantic meridional overturning circulation

Details

Serval ID
serval:BIB_CBA6D49345B9
Type
Article: article from journal or magazin.
Collection
Publications
Title
Deep water provenance and dynamics of the (de)glacial Atlantic meridional overturning circulation
Journal
Earth and Planetary Science Letters
Author(s)
Lippold Jörg, Gutjahr Marcus, Blaser Patrick, Christner Emanuel, de Carvalho Ferreira Maria Luiza, Mulitza Stefan, Christl Marcus, Wombacher Frank, Böhm Evelyn, Antz Benny, Cartapanis Olivier, Vogel Hendrik, Jaccard Samuel L.
ISSN
0012-821X
Publication state
Published
Issued date
07/2016
Peer-reviewed
Oui
Volume
445
Pages
68-78
Language
english
Abstract
Reconstructing past modes of ocean circulation is an essential task in paleoclimatology and paleoceanography. To this end, we combine two sedimentary proxies, Nd isotopes () and the 231Pa/230Th ratio, both of which are not directly involved in the global carbon cycle, but allow the reconstruction of water mass provenance and provide information about the past strength of overturning circulation, respectively. In this study, combined 231Pa/230Th and down-core profiles from six Atlantic Ocean sediment cores are presented. The data set is complemented by the two available combined data sets from the literature. From this we derive a comprehensive picture of spatial and temporal patterns and the dynamic changes of the Atlantic Meridional Overturning Circulation over the past ∼25 ka. Our results provide evidence for a consistent pattern of glacial/stadial advances of Southern Sourced Water along with a northward circulation mode for all cores in the deeper (>3000 m) Atlantic. Results from shallower core sites support an active overturning cell of shoaled Northern Sourced Water during the LGM and the subsequent deglaciation. Furthermore, we report evidence for a short-lived period of intensified AMOC in the early Holocene.
Keywords
Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Geochemistry and Petrology, Geophysics
Web of science
Open Access
Yes
Funding(s)
European Research Council (ERC) / 339108
Swiss National Science Foundation / PP00P2_144811
Create date
06/09/2021 13:36
Last modification date
12/07/2024 8:47
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