Header
Header
Article

A deep Tasman outflow of Pacific waters during the last glacial period



Struve, Torben;

Wilson, David J;

Hines, Sophia KV;

Adkins, Jess F;

van de Flierdt, Tina;

(2022)

A deep Tasman outflow of Pacific waters during the last glacial period.

Nature Communications
, 13


, Article 3763. 10.1038/s41467-022-31116-7.

[thumbnail of Struve et al 2022 Nature Communications.pdf]


Text

Struve et al 2022 Nature Communications.pdf
– Published Version

Download (3MB)

Abstract

The interoceanic exchange of water masses is modulated by flow through key oceanic choke points in the Drake Passage, the Indonesian Seas, south of Africa, and south of Tasmania. Here, we use the neodymium isotope signature (εNd) of cold-water coral skeletons from intermediate depths (1460‒1689 m) to trace circulation changes south of Tasmania during the last glacial period. The key feature of our dataset is a long-term trend towards radiogenic εNd values of ~−4.6 during the Last Glacial Maximum and Heinrich Stadial 1, which are clearly distinct from contemporaneous Southern Ocean εNd of ~−7. When combined with previously published radiocarbon data from the same corals, our results indicate that a unique radiogenic and young water mass was present during this time. This scenario can be explained by a more vigorous Pacific overturning circulation that supported a deeper outflow of Pacific waters, including North Pacific Intermediate Water, through the Tasman Sea.

Type: Article

Title: A deep Tasman outflow of Pacific waters during the last glacial period
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s41467-022-31116-7
Publisher version: https://doi.org/10.1038/s41467-022-31116-7
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Keywords: Marine chemistry, Palaeoceanography, Palaeoclimate, Physical oceanography
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10151151
Download activity – last month
Download activity – last 12 months
Downloads by country – last 12 months

Archive Staff Only

View Item View Item



Source link

Back to top button