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Article Dans Une Revue Nature Communications Année : 2021

Global warming-induced Asian hydrological climate transition across the Miocene–Pliocene boundary

Hong Ao
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Ran Zhang
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Andrew P Roberts
Zhonghui Liu
Yong Xu
Qiang Sun
Xiaodong Liu
Weijian Zhou
Zhangdong Jin
Xianzhe Peng
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Xiaoke Qiang
Zhisheng An

Résumé

Across the Miocene-Pliocene boundary (MPB; 5.3 million years ago, Ma), late Miocene cooling gave way to the early-to-middle Pliocene Warm Period. This transition, across which atmospheric CO 2 concentrations increased to levels similar to present, holds potential for deciphering regional climate responses in Asia-currently home to more than half of the world's population-to global climate change. Here we find that CO 2-induced MPB warming both increased summer monsoon moisture transport over East Asia, and enhanced aridification over large parts of Central Asia by increasing evaporation, based on integration of our 1-2-thousand-year (kyr) resolution summer monsoon records from the Chinese Loess Plateau aeolian red clay with existing terrestrial records, land-sea correlations, and climate model simulations. Our results offer palaeoclimate-based support for 'wet-gets-wetter and dry-gets-drier' projections of future regional hydroclimate responses to sustained anthropogenic forcing. Moreover, our high-resolution monsoon records reveal a dynamic response to eccentricity modulation of solar insolation, with predominant 405-kyr and~100-kyr periodicities between 8.1 and 3.4 Ma.

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Stratigraphie
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Dates et versions

hal-03469338 , version 1 (07-12-2021)

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Hong Ao, Eelco J Rohling, Ran Zhang, Andrew P Roberts, Ann E Holbourn, et al.. Global warming-induced Asian hydrological climate transition across the Miocene–Pliocene boundary. Nature Communications, 2021, 12 (1), pp.6935. ⟨10.1038/s41467-021-27054-5⟩. ⟨hal-03469338⟩
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