Glacial reduction and millennial-scale variations in Drake Passage throughflow

Lamy, Frank, Arz, Helge W., Kilian, Rolf, Lange, Carina B., Lembke-Jene, Lester, Wengler, Marc, Kaiser, Jérôme, Baeza-Urreac, Oscar, Hall, Ian Robert ORCID: https://orcid.org/0000-0001-6960-1419, Harada, Naomi and Tiedemann, Ralf 2015. Glacial reduction and millennial-scale variations in Drake Passage throughflow. Proceedings of the National Academy of Sciences 112 (44) , pp. 13496-13501. 10.1073/pnas.1509203112

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Abstract

The Drake Passage (DP) represents the most important oceanic gateway along the pathway of the world’s largest current: the Antarctic Circumpolar Current (ACC). Resolving changes in the flow of circumpolar water masses through the DP is crucial for advancing our understanding of the Southern Ocean’s role in affecting ocean and climate change on a global scale. We reconstruct current intensity from marine sediment records around the southern tip of South America with unprecedented millennial-scale resolution covering the past ∼65,000 y. For the last glacial period, we infer intervals of strong weakening of the ACC entering the DP, implying an enhanced export of northern ACC surface and intermediate waters into the South Pacific Gyre and reduced Pacific–Atlantic exchange through the cold water route.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences Water Research Institute (WATER)
Publisher:	National Academy of Sciences
ISSN:	1091-6490
Date of First Compliant Deposit:	30 March 2016
Date of Acceptance:	31 July 2015
Last Modified:	03 May 2023 11:29
URI:	https://orca.cardiff.ac.uk/id/eprint/77063

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