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Combined high- and low-latitude forcing of East Asian monsoon precipitation variability in the Pliocene warm period
Wang, Y.; Lu, H.; Wang, K.; Wang, Y.; Li, Y.; Clemens, S.; Lv, H.; Huang, Z.; Wang, H.; Hu, X.; Lu, F.; Zhang, H. (2020). Combined high- and low-latitude forcing of East Asian monsoon precipitation variability in the Pliocene warm period. Science Advances 6(46): eabc2414. https://dx.doi.org/10.1126/sciadv.abc2414
In: Science Advances. AAAS: New York. ISSN 2375-2548; e-ISSN 2375-2548
Peer reviewed article  
Beschikbaar in  Auteurs 
Auteurs  Top 
  • Wang, Y.
  • Lu, H.
  • Wang, K.
  • Wang, Y.
  • Li, Y.
  • Clemens, S.
  • Lv, H.
  • Huang, Z.
  • Wang, H.
  • Hu, X.
  • Lu, F.
  • Zhang, H.
Abstract
    East Asian monsoon variability in the Pliocene warm world has not been sufficiently studied because of the lack of direct records. We present a high-resolution precipitation record from Pliocene fluvial-lacustrine sequences in the Weihe Basin, Central China, a region sensitive to the East Asian monsoon. The record shows an abrupt monsoon shift at ~4.2 million years ago, interpreted as the result of high-latitude cooling, with an extratropical temperature decrease across a critical threshold. The precipitation time series exhibits a pronounced ~100–thousand year periodicity and the presence of precession and half-precession cycles, which suggest low-latitude forcing. The synchronous phase but mismatched amplitudes of the East Asian monsoon precipitation proxy and eccentricity suggest a nonlinear but sensitive precipitation response to temperature forcing in the Pliocene warm world. These observations highlight the role of high- and low-latitude forcing of East Asian monsoon variations on tectonic and orbital time scales.
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