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Pliocene reversal of late Neogene aridification

Identifieur interne : 001943 ( Main/Exploration ); précédent : 001942; suivant : 001944

Pliocene 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 :

RBID : PMC:4776468

Descripteurs français

English descriptors

Abstract

Significance

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


Affiliations:


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Le document en format XML

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<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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