Sedimentological Evidence for Pronounced Glacial‐Interglacial Climate Fluctuations in NE Tibet in the Latest Pliocene to Early Pleistocene
| Autor: | Xiaomin Fang, Yin Lu, Stefanie Kaboth-Bahr, Nico Dewald, Erwin Appel, Andreas Koutsodendris, Oliver Friedrich, Jörg Pross, Wolfgang Rösler |
|---|---|
| Přispěvatelé: | Dewald, Nico, 1 Institute of Earth Sciences Heidelberg University Heidelberg Germany, Koutsodendris, Andreas, Kaboth‐Bahr, Stefanie, Rösler, Wolfgang, 5 Institute of Geosciences University of Tübingen Tübingen Germany, Fang, Xiaomin, 6 Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing China, Pross, Jörg, Appel, Erwin, Friedrich, Oliver |
| Rok vydání: | 2020 |
| Předmět: |
551.7
Atmospheric Science geography Plateau geography.geographical_feature_category Pleistocene Paleontology Climate change Westerlies Oceanography 550 Geowissenschaften Siberian High loss on ignition SEM Asian monsoon Interglacial ddc:550 EMMA East Asian Monsoon Institut für Geowissenschaften dust Glacial period Physical geography Geology |
| Zdroj: | Paleoceanography and Paleoclimatology. 35 |
| ISSN: | 2572-4525 2572-4517 |
| Popis: | 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. German Research Foundation (DFG |
| Databáze: | OpenAIRE |
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