期刊
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷 22, 期 6, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2021GC009655
关键词
Early Miocene; East Asia; global cooling; Paratethys Sea retreat; Tibetan Plateau growth
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB42000000]
- National Natural Science Foundation of China [41888101, 41775088, 42071113]
Research suggests that the growth of the Tibetan Plateau (TP), retreat of the Paratethys Sea, and global cooling had different effects on the climate change in East Asia during the early Miocene. The TP growth led to increased annual precipitation in East China, while the retreat of the Paratethys Sea and global cooling generally decreased annual precipitation in the region. All three factors studied contributed to aridification in inland Asia.
Paleobotanical and sedimentological records indicate that marked climatic and environmental transitions had taken place in East China by the early Miocene. These transitions were driven by paleogeographic and global climatic shifts, but the respective roles of these shifts in the Asian climate remain unclear. Here, we use the low-resolution Norwegian Earth System Model and Community Atmosphere Model version 4 to compare the effects of Tibetan Plateau (TP) growth, Paratethys Sea retreat and global cooling on the East Asian climate change that occurred by the early Miocene. The modeling results indicate that these three factors had clearly different climatic effects in East China. In particular, TP growth increased annual precipitation in East China, while Paratethys Sea retreat and global cooling generally decreased annual precipitation in East China. In addition, the three factors studied all drove aridification in inland Asia. Considering the increased precipitation, arid/semiarid-to-humid shift in vegetation and high plant diversity present in East China by the early Miocene, as shown in geological records, TP growth thus played a major role in these respects.
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