The residence time of Southern Ocean surface waters and the 100,000-year ice age cycle-Reference-Cited by-同舟云学术

The residence time of Southern Ocean surface waters and the 100,000-year ice age cycle

Published:2019-03-08 Issue:6431 Volume:363 Page:1080-1084
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Hasenfratz Adam P.¹²^ORCID,Jaccard Samuel L.²^ORCID,Martínez-García Alfredo³^ORCID,Sigman Daniel M.⁴^ORCID,Hodell David A.⁵^ORCID,Vance Derek⁶,Bernasconi Stefano M.¹^ORCID,Kleiven Helga (Kikki) F.⁷^ORCID,Haumann F. Alexander⁸⁹^ORCID,Haug Gerald H.¹³

Affiliation:

1. Geological Institute, Department of Earth Sciences, ETH Zürich, Zürich, Switzerland.

2. Institute of Geological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland.

3. Max Planck Institute for Chemistry, Mainz, Germany.

4. Department of Geosciences, Guyot Hall, Princeton University, Princeton, NJ, USA.

5. Department of Earth Sciences, University of Cambridge, Cambridge, UK.

6. Institute of Geochemistry and Petrology, ETH Zürich, Zürich, Switzerland.

7. Department of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway.

8. British Antarctic Survey, Cambridge, UK.

9. Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA.

Abstract

Resetting the glacial timer The periodicity of glacial cycles changed from 100,000 to 41,000 years during the middle of the Pleistocene epoch. Why? Hasenfratz et al. measured the oxygen isotope composition and magnesium/calcium ratio in benthic and planktonic foraminifera from the Antarctic in order to reconstruct changes in the rate of transfer of ocean water from the depths to the surface over the past 1.5 million years (see the Perspective by Menviel). The emergence of the 100,000-year cycle coincided with a reduction in deep-water supply and a freshening of the surface ocean. This slowing may have caused more prolonged ice ages by making the Antarctic less responsive to orbitally paced drivers of carbon dioxide release. Science , this issue p. 1080 ; see also p. 1040

Funder

National Science Foundation

Exxon Mobil Corporation

Swiss National Science Foundation

The Research Council of Norway

Max-Planck-Gesellschaft

Eidgenössische Technische Hochschule Zürich

ACE Foundation and Ferring Pharmaceuticals

Fondation BNP Paribas

Publisher

American Association for the Advancement of Science (AAAS)

Subject