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Sedimentological Evidence for Pronounced Glacial‐Interglacial Climate Fluctuations in NE Tibet in the Latest Pliocene to Early Pleistocene

Lu, YinORCIDiD
Dewald, NicoORCIDiD
Koutsodendris, AndreasORCIDiD
Kaboth‐Bahr, Stefanie
Rösler, Wolfgang
Fang, XiaominORCIDiD
Pross, Jörg
Appel, ErwinORCIDiD
Friedrich, OliverORCIDiD
DOI: https://doi.org/10.1029/2020PA003864
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8499
Lu, Yin; Dewald, Nico; Koutsodendris, Andreas; Kaboth‐Bahr, Stefanie; Rösler, Wolfgang; Fang, Xiaomin; Pross, Jörg; Appel, Erwin; Friedrich, Oliver, 2020: Sedimentological Evidence for Pronounced Glacial‐Interglacial Climate Fluctuations in NE Tibet in the Latest Pliocene to Early Pleistocene. In: Paleoceanography and Paleoclimatology, Band 35, 5, DOI: 10.1029/2020PA003864.
 
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  • Abstract
The intensification of Northern Hemisphere glaciation (iNHG) and uplift of the Tibetan Plateau have been argued to be among the main drivers of climate change in midlatitude Central Asia during the Pliocene/Pleistocene. While most proxy records that support this hypothesis are from regions outside the Tibetan Plateau (such as from the Chinese Loess Plateau), detailed paleoclimatic information for the plateau itself during that time has yet remained elusive. Here we present a temporally highly resolved (~500 years) sedimentological record from the Qaidam Basin situated on the northeastern Tibetan Plateau that shows pronounced glacial‐interglacial climate variability during the interval from 2.7 to 2.1 Ma. Glacial (interglacial) intervals are generally characterized by coarser (finer) grain size, minima (maxima) in organic matter content, and maxima (minima) in carbonate content. Comparison of our results with Earth's orbital parameters and proxy records from the Chinese Loess Plateau suggests that the observed climate fluctuations were mainly driven by changes in the Siberian High/East Asian winter monsoon system as a response to the iNHG. They are further proposed to be enhanced by the topography of the Tibetan Plateau and its impact on the position and intensity of the westerlies.
 
Key Points: Pronounced glacial‐interglacial climate fluctuations on the NE Tibetan Plateau during the latest Pliocene and early Pleistocene. Changes in East Asian Winter Monsoon and the position of the westerlies influenced sediment transport on the NE Tibetan Plateau. Intensification of Northern Hemisphere glaciation amplified climate fluctuations on the NE Tibetan Plateau.
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  • Geologie [737]
Subjects:
loss on ignition
EMMA
SEM
dust
Asian monsoon
Westerlies
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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