Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic

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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_458C0A10DB35
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
Journal
Nature Communications
Author(s)
Liu Jingyu, Wang Yipeng, Jaccard Samuel L., Wang Nan, Gong Xun, Fang Nianqiao, Bao Rui
ISSN
2041-1723
Publication state
Published
Issued date
24/06/2023
Peer-reviewed
Oui
Volume
14
Number
1
Language
english
Abstract
Changes in ocean ventilation have been pivotal in regulating carbon sequestration and release on centennial to millennial timescales. However, paleoceanographic reconstructions documenting changes in deep-ocean ventilation using 14C dating, may bear multidimensional explanations, obfuscating the roles of ocean ventilation played on climate evolution. Here, we show that previously inferred poorly ventilated conditions in the North Atlantic were linked to enhanced pre-aged organic carbon (OC) input during Heinrich Stadial 1 (HS1). The 14C age of sedimentary OC was approximately 13,345 ± 692 years older than the coeval foraminifera in the central North Atlantic during HS1, which is coupled to a ventilation age of 5,169 ± 660 years. Old OC was mainly of terrigenous origin and exported to the North Atlantic by ice-rafting. Remineralization of old terrigenous OC in the ocean may have contributed to, at least in part, the anomalously old ventilation ages reported for the high-latitude North Atlantic during HS1.
Keywords
General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary
Open Access
Yes
Create date
26/06/2023 9:25
Last modification date
01/07/2023 6:48
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