DOI: 10.5194/cp-12-1473-2016
Scopus记录号: 2-s2.0-84978371909
论文题名: Palynological evidence for late Miocene stepwise aridification on the northeastern Tibetan Plateau
作者: Liu J. ; Jun Li J. ; Hui Song C. ; Yu H. ; Jiang Peng T. ; Chuang Hui Z. ; Yan Ye X.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 7 起始页码: 1473
结束页码: 1484
语种: 英语
Scopus关键词: aridification
; climate variation
; cooling
; humid environment
; Miocene
; paleoclimate
; paleoenvironment
; palynology
; succession
; tectonics
; temperate forest
; uplift
; China
; Gansu
; Longzhong Basin
; Qinghai-Xizang Plateau
; Tianshui Basin
英文摘要: Holding a climatically and geologically key position both regionally and globally, the northeastern Tibetan Plateau provides a natural laboratory for illustrating the interactions between tectonic activity and the evolution of the Asian interior aridification. Determining when and how the late Miocene climate evolved on the northeastern Tibetan Plateau may help us better understand the relationships among tectonic uplift, global cooling and ecosystem evolution. Previous paleoenvironmental research has focused on the western Longzhong Basin. Late Miocene aridification data derived from pollen now require corroborative evidence from the eastern Longzhong Basin. Here, we present a late Miocene pollen record from the Tianshui Basin in the eastern Longzhong Basin. Our results show that a general trend toward dry climate was superimposed by stepwise aridification: a temperate forest with a rather humid climate existed in the basin between 11.4 and 10.1 Ma, followed by a temperate open forest environment with a less humid climate between 10.1 and 7.4 Ma, then giving way to an open temperate forest-steppe environment with a relatively arid climate between 7.4 and 6.4 Ma. The vegetation succession demonstrates that the aridification of the Asian interior occurred after g 7-8 Ma, which is confirmed by other evidence from Asia. Furthermore, the aridification trend on the northeastern Tibetan Plateau parallels the global cooling of the late Miocene; the stepwise vegetation succession is consistent with the major uplift of the northeastern Tibetan Plateau during this time. These integrated environmental proxies indicate that the long-term global cooling and the Tibetan Plateau uplift caused the late Miocene aridification of the Asian interior. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48995
Appears in Collections: 气候变化与战略
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Recommended Citation:
Liu J.,Jun Li J.,Hui Song C.,et al. Palynological evidence for late Miocene stepwise aridification on the northeastern Tibetan Plateau[J]. Climate of the Past,2016-01-01,12(7)