Henry, L. G. and McManus, J. F. and Curry, W. B. and Roberts, N. L. and Piotrowski, A. M. and Keigwin, L. D. (2016) North Atlantic ocean circulation and abrupt climate change during the last glaciation. Science, 353 (6298). pp. 470-474. ISSN 0036-8075 (print), 1095-9203 (online) DOI https://doi.org/10.1126/science.aaf5529
![]()
|
Image
F1.large.jpg - Accepted Version Download (147kB) | Preview |
|
|
Text
Henry accepted Ms Science 2016.pdf - Accepted Version Download (1MB) | Preview |
|
|
Text
Henry et al., Science 2016 Supplement-1.pdf - Supplemental Material Download (1MB) | Preview |
|
![]() |
Text
Henry et al., 2016 Science published PDF.pdf - Published Version Restricted to Repository staff only Download (1MB) | Request a copy |
Abstract
The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in oceanic meridional heat transport may contribute to these repeated climate changes, which were most pronounced during marine isotope stage 3, the glacial interval 25 thousand to 60 thousand years ago. We examined climate and ocean circulation proxies throughout this interval at high resolution in a deep North Atlantic sediment core, combining the kinematic tracer protactinium/thorium (Pa/Th) with the deep water-mass tracer, epibenthic δ13C. These indicators suggest reduced Atlantic overturning circulation during every cool northern stadial, with the greatest reductions during episodic Hudson Strait iceberg discharges, while sharp northern warming followed reinvigorated overturning. These results provide direct evidence for the ocean’s persistent, central role in abrupt glacial climate change.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | 2016AREP; IA71 |
Subjects: | 01 - Climate Change and Earth-Ocean Atmosphere Systems |
Divisions: | 01 - Climate Change and Earth-Ocean Atmosphere Systems 08 - Green Open Access |
Journal or Publication Title: | Science |
Volume: | 353 |
Page Range: | pp. 470-474 |
Identification Number: | https://doi.org/10.1126/science.aaf5529 |
Depositing User: | Sarah Humbert |
Date Deposited: | 02 Aug 2016 16:45 |
Last Modified: | 02 Aug 2016 16:45 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/3739 |
Actions (login required)
![]() |
View Item |