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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hellstrom, John Sniderman, J. M. Kale Woodhead, Jon D. Tyler, Jonathan J. Jordan, Gregory J. Drysdale, Russell N. Porch, Nicholas |
| Spatial Coverage | Australia |
| Description | Author Affiliation: Sniderman JM ( School of Earth Sciences, University of Melbourne, Parkville, VIC 3010, Australia); Woodhead JD ( School of Earth Sciences, University of Melbourne, Parkville, VIC 3010, Australia); Hellstrom J ( School of Earth Sciences, University of Melbourne, Parkville, VIC 3010, Australia); Jordan GJ ( School of Biological Sciences, University of Tasmania, Private Bag 55, Hobart, TAS 7001, Australia); Drysdale RN ( School of Geography, University of Melbourne, Parkville, VIC 3010, Australia); Tyler JJ ( Department of Earth Sciences, University of Adelaide, Adelaide, SA 5001, Australia); Porch N ( School of Life and Environmental Sciences, Deakin University, Burwood, VIC, 3125, Australia.); |
| Abstract | The Pliocene epoch (5.3-2.6 Ma) represents the most recent geological interval in which global temperatures were several degrees warmer than today and is therefore considered our best analog for a future anthropogenic greenhouse world. However, our understanding of Pliocene climates is limited by poor age control on existing terrestrial climate archives, especially in the Southern Hemisphere, and by persistent disagreement between paleo-data and models concerning the magnitude of regional warming and/or wetting that occurred in response to increased greenhouse forcing. To address these problems, here we document the evolution of Southern Hemisphere hydroclimate from the latest Miocene to the middle Pliocene using radiometrically-dated fossil pollen records preserved in speleothems from semiarid southern Australia. These data reveal an abrupt onset of warm and wet climates early within the Pliocene, driving complete biome turnover. Pliocene warmth thus clearly represents a discrete interval which reversed a long-term trend of late Neogene cooling and aridification, rather than being simply the most recent period of greater-than-modern warmth within a continuously cooling trajectory. These findings demonstrate the importance of high-resolution chronologies to accompany paleoclimate data and also highlight the question of what initiated the sustained interval of Pliocene warmth. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 113 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2016-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Climate Paleontology Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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