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<p>The late Miocene was a critical period in Earth’s climate and biosphere evolution, with intensified climate variability, major terrestrial ecosystem reorganization, and formation of modern-like Tibetan Plateau. However, mechanisms linking these transformations remain elusive. Here we integrate quantitative Asian summer monsoon precipitation and qualitative Asian winter monsoon intensity reconstructions, mammalian fossil records, and climate simulations to investigate this nexus in the mammal-rich northeastern Tibetan Plateau. Results show near-synchronous Asian summer and winter monsoon intensification and pronounced biotic turnover at ~8.7 Ma. We attribute these to late Miocene global cooling and northern Tibetan Plateau uplift, which together enhanced Asian monsoon circulation. Climate modelling under different palaeotopographic scenarios highlight the critical role of northern Tibetan Plateau uplift in strengthening monsoon dynamics. These findings emphasize the late Miocene as a key interval of coupled climatic, tectonic, and ecological transitions, and the importance of Tibetan Plateau uplift in modulating regional climate and biodiversity evolution.</p>

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Late Miocene Asian monsoon intensification and turnover of Asian mammal communities

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月3日

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  • Wenxia Han,
  • Tao Zhang,
  • Jian Zhang,
  • Hong Ao,
  • David B. Kemp,
  • Tianli Wang,
  • Jimin Sun,
  • Xiaoli Yan,
  • Shiqi Wang,
  • Qigao Jiangzuo,
  • Qian Tian,
  • Yifei Fan,
  • Li Mai,
  • Niels Meijer,
  • Xiaomin Fang

摘要

The late Miocene was a critical period in Earth’s climate and biosphere evolution, with intensified climate variability, major terrestrial ecosystem reorganization, and formation of modern-like Tibetan Plateau. However, mechanisms linking these transformations remain elusive. Here we integrate quantitative Asian summer monsoon precipitation and qualitative Asian winter monsoon intensity reconstructions, mammalian fossil records, and climate simulations to investigate this nexus in the mammal-rich northeastern Tibetan Plateau. Results show near-synchronous Asian summer and winter monsoon intensification and pronounced biotic turnover at ~8.7 Ma. We attribute these to late Miocene global cooling and northern Tibetan Plateau uplift, which together enhanced Asian monsoon circulation. Climate modelling under different palaeotopographic scenarios highlight the critical role of northern Tibetan Plateau uplift in strengthening monsoon dynamics. These findings emphasize the late Miocene as a key interval of coupled climatic, tectonic, and ecological transitions, and the importance of Tibetan Plateau uplift in modulating regional climate and biodiversity evolution.