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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Martínez-garcía, Alfredo Hodell, David A. Anderson, Robert F. Jaccard, Samuel L. Hayes, Christopher T. Haug, Gerald H. Sigman, Daniel M. Hasenfratz, Adam P. |
| Spatial Coverage | Atlantic Ocean |
| Description | Author Affiliation: Hayes CT ( Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology (MIT), Cambridge, MA 02142, USA. Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA. cthayes@mit.edu.); Martínez-García A ( Geological Institute, ETH Zürich, 8092 Zürich, Switzerland.); Hasenfratz AP ( Geological Institute, ETH Zürich, 8092 Zürich, Switzerland.); Jaccard SL ( Institute of Geological Sciences and Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland.); Hodell DA ( Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK.); Sigman DM ( Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.); Haug GH ( Geological Institute, ETH Zürich, 8092 Zürich, Switzerland.); Anderson RF ( Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA.) |
| Abstract | During the last interglacial period, global temperatures were ~2°C warmer than at present and sea level was 6 to 8 meters higher. Southern Ocean sediments reveal a spike in authigenic uranium 127,000 years ago, within the last interglacial, reflecting decreased oxygenation of deep water by Antarctic Bottom Water (AABW). Unlike ice age reductions in AABW, the interglacial stagnation event appears decoupled from open ocean conditions and may have resulted from coastal freshening due to mass loss from the Antarctic ice sheet. AABW reduction coincided with increased North Atlantic Deep Water (NADW) formation, and the subsequent reinvigoration in AABW coincided with reduced NADW formation. Thus, alternation of deep water formation between the Antarctic and the North Atlantic, believed to characterize ice ages, apparently also occurs in warm climates. |
| ISSN | 00368075 |
| Issue Number | 6216 |
| Volume Number | 346 |
| e-ISSN | 10959203 |
| Journal | Science |
| Language | English |
| Publisher | American Association for the Advancement of Science (United States) |
| Publisher Date | 2014-12-19 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ice Cover Seawater Atlantic Ocean Climate Change Oxygen Analysis Salinity Journal Article Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | History and Philosophy of Science |
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