Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene

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Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_858DEE5A97C5
Type
Article: article from journal or magazin.
Collection
Publications
Title
Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene
Journal
Geophysical Research Letters
Author(s)
Lippold Jörg, Pöppelmeier Frerk, Süfke Finn, Gutjahr Marcus, Goepfert Tyler J., Blaser Patrick, Friedrich Oliver, Link Jasmin M., Wacker Lukas, Rheinberger Stefan, Jaccard Samuel L.
ISSN
0094-8276
1944-8007
Publication state
Published
Issued date
28/10/2019
Peer-reviewed
Oui
Volume
46
Number
20
Pages
11338-11346
Language
english
Abstract
There is a converging body of evidence supporting a measurable slowdown of the Atlantic Meridional Overturning Circulation (AMOC) as climate warms and Northern Hemisphere ice sheets inexorably shrink. Within this context, we assess the variability of the AMOC during the Holocene based on a marine sediment core retrieved from the deep northwest Atlantic, which sensitively recorded large-scale deglacial transitions in deep water circulation. While there is a diffuse notion of Holocene variability in Labrador and Nordic Seas overturning, we report a largely invariable deep water circulation for the last ~11,000 years, even during the meltwater pulse associated with the 8.2-ka event. Sensitivity tests along with high-resolution 231Pa/230Th data constrain the duration and the magnitude of possible Holocene AMOC variations. The generally constant baseline during the Holocene suggests attenuated natural variability of the large-scale AMOC on submillennial timescales and calls for compensating effects involving the upstream components of North Atlantic Deep Water.
Keywords
AMOC, Holocene, high resolution 231Pa/230Th, Bermuda Rise, sensitivity tests
Web of science
Open Access
Yes
Funding(s)
Swiss National Science Foundation / 200021_163003
Create date
06/09/2021 14:43
Last modification date
12/07/2024 9:44
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