Pliocene reversal of late Neogene aridification
Identifieur interne : 003111 ( Ncbi/Curation ); précédent : 003110; suivant : 003112Pliocene reversal of late Neogene aridification
Auteurs : J. M. Kale Sniderman [Australie] ; Jon D. Woodhead [Australie] ; John Hellstrom [Australie] ; Gregory J. Jordan [Australie] ; Russell N. Drysdale [Australie, France] ; Jonathan J. Tyler [Australie] ; Nicholas Porch [Australie]Source :
- Proceedings of the National Academy of Sciences of the United States of America [ 0027-8424 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- Wicri :
- geographic : Australie.
English descriptors
- KwdEn :
- MESH :
- geographic : Australia.
- Climate, Paleontology.
Abstract
The warm climates of the Pliocene epoch are considered our best analog for a future anthropogenic greenhouse world. However, understanding of the nature of Pliocene climate variability and change on land is currently limited by the poor age control of most existing terrestrial climate archives. We present a radiometrically dated history of the evolution of Southern Hemisphere vegetation and hydroclimate from the latest Miocene to the middle Pliocene. These data reveal a sharp increase in precipitation in the Early Pliocene, which drove complete vegetation turnover. The development of warm, wet early Pliocene climates clearly reversed a long-term Southern Hemisphere trend of late Neogene cooling and aridification, highlighting the question of what initiated this sustained, ∼1.5-My-long interval of warmth.
Url:
DOI: 10.1073/pnas.1520188113
PubMed: 26858429
PubMed Central: 4776468
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PMC:4776468Le document en format XML
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<front><div type="abstract" xml:lang="en"><title>Significance</title>
<p>The warm climates of the Pliocene epoch are considered our best analog for a future anthropogenic greenhouse world. However, understanding of the nature of Pliocene climate variability and change on land is currently limited by the poor age control of most existing terrestrial climate archives. We present a radiometrically dated history of the evolution of Southern Hemisphere vegetation and hydroclimate from the latest Miocene to the middle Pliocene. These data reveal a sharp increase in precipitation in the Early Pliocene, which drove complete vegetation turnover. The development of warm, wet early Pliocene climates clearly reversed a long-term Southern Hemisphere trend of late Neogene cooling and aridification, highlighting the question of what initiated this sustained, ∼1.5-My-long interval of warmth.</p>
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